Merge branch 'master' of git@scm.dev.nokia.troll.no:qt/qt

98 files changed, 3850 insertions, 2464 deletions

diff --git a/src/3rdparty/phonon/ds9/videowidget.cpp b/src/3rdparty/phonon/ds9/videowidget.cpp
index 0ef653f..34ff8cb 100644
--- a/src/3rdparty/phonon/ds9/videowidget.cpp
+++ b/src/3rdparty/phonon/ds9/videowidget.cpp
@@ -153,7 +153,7 @@ namespace Phonon
                     }
                 } else if (!isEmbedded()) {
                     m_currentRenderer = m_node->switchRendering(m_currentRenderer);
-                    setAttribute(Qt::WA_PaintOnScreen, true);
+                    setAttribute(Qt::WA_PaintOnScreen, false);
                 }
             }
 
diff --git a/src/corelib/animation/qpropertyanimation.cpp b/src/corelib/animation/qpropertyanimation.cpp
index 7526a81..5f224aa 100644
--- a/src/corelib/animation/qpropertyanimation.cpp
+++ b/src/corelib/animation/qpropertyanimation.cpp
@@ -100,10 +100,6 @@
 
 QT_BEGIN_NAMESPACE
 
-typedef QPair<QObject *, QByteArray> QPropertyAnimationPair;
-typedef QHash<QPropertyAnimationPair, QPropertyAnimation*> QPropertyAnimationHash;
-Q_GLOBAL_STATIC(QPropertyAnimationHash, _q_runningAnimations)
-
 void QPropertyAnimationPrivate::updateMetaProperty()
 {
     if (!target || propertyName.isEmpty())
@@ -286,19 +282,21 @@ void QPropertyAnimation::updateState(QAbstractAnimation::State oldState,
 
     QPropertyAnimation *animToStop = 0;
     {
-        QPropertyAnimationHash * hash = _q_runningAnimations();
-        QMutexLocker locker(QMutexPool::globalInstanceGet(hash));
+        QMutexLocker locker(QMutexPool::globalInstanceGet(&staticMetaObject));
+        typedef QPair<QObject *, QByteArray> QPropertyAnimationPair;
+        typedef QHash<QPropertyAnimationPair, QPropertyAnimation*> QPropertyAnimationHash;
+        static QPropertyAnimationHash hash;
         QPropertyAnimationPair key(d->target, d->propertyName);
         if (newState == Running) {
             d->updateMetaProperty();
-            animToStop = hash->value(key, 0);
-            hash->insert(key, this);
+            animToStop = hash.value(key, 0);
+            hash.insert(key, this);
             // update the default start value
             if (oldState == Stopped) {
                 d->setDefaultStartValue(d->target->property(d->propertyName.constData()));
             }
-        } else if (hash->value(key) == this) {
-            hash->remove(key);
+        } else if (hash.value(key) == this) {
+            hash.remove(key);
         }
     }
 
diff --git a/src/corelib/codecs/qiconvcodec.cpp b/src/corelib/codecs/qiconvcodec.cpp
index 1bf76ea..188ac8c 100644
--- a/src/corelib/codecs/qiconvcodec.cpp
+++ b/src/corelib/codecs/qiconvcodec.cpp
@@ -225,10 +225,11 @@ QString QIconvCodec::convertToUnicode(const char* chars, int len, ConverterState
     char *inBytes = const_cast<char *>(chars);
 #endif
 
+    QByteArray in;
     if (remainingCount) {
         // we have to prepend the remaining bytes from the previous conversion
         inBytesLeft += remainingCount;
-        QByteArray in(inBytesLeft, Qt::Uninitialized);
+        in.resize(inBytesLeft);
         inBytes = in.data();
 
         memcpy(in.data(), remainingBuffer, remainingCount);
@@ -362,9 +363,10 @@ QByteArray QIconvCodec::convertFromUnicode(const QChar *uc, int len, ConverterSt
     inBytes = const_cast<char *>(reinterpret_cast<const char *>(uc));
     inBytesLeft = len * sizeof(QChar);
 
+    QByteArray in;
     if (convState && convState->remainingChars) {
         // we have one surrogate char to be prepended
-        QByteArray in(sizeof(QChar) + len, Qt::Uninitialized);
+        in.resize(sizeof(QChar) + len);
         inBytes = in.data();
 
         QChar remaining = convState->state_data[0];
diff --git a/src/corelib/global/qglobal.h b/src/corelib/global/qglobal.h
index a139a55..d6c708c 100644
--- a/src/corelib/global/qglobal.h
+++ b/src/corelib/global/qglobal.h
@@ -2062,7 +2062,7 @@ public:
 
     inline bool operator!() const { return !i; }
 
-    inline bool testFlag(Enum f) const { return (i & f) == f; }
+    inline bool testFlag(Enum f) const { return (i & f) == f && (f != 0 || i == f ); }
 };
 
 #define Q_DECLARE_FLAGS(Flags, Enum)\
diff --git a/src/corelib/io/qbuffer.cpp b/src/corelib/io/qbuffer.cpp
index aed5b82..3883d30 100644
--- a/src/corelib/io/qbuffer.cpp
+++ b/src/corelib/io/qbuffer.cpp
@@ -452,7 +452,7 @@ qint64 QBuffer::writeData(const char *data, qint64 len)
 */
 void QBuffer::connectNotify(const char *signal)
 {
-    if (strcmp(signal + 1, "readyRead()") == 0 || strcmp(signal + 1, "bytesWritten(qint64)"))
+    if (strcmp(signal + 1, "readyRead()") == 0 || strcmp(signal + 1, "bytesWritten(qint64)") == 0)
         d_func()->signalConnectionCount++;
 }
 
diff --git a/src/corelib/kernel/qabstracteventdispatcher.cpp b/src/corelib/kernel/qabstracteventdispatcher.cpp
index a98d005..e2682f5 100644
--- a/src/corelib/kernel/qabstracteventdispatcher.cpp
+++ b/src/corelib/kernel/qabstracteventdispatcher.cpp
@@ -398,20 +398,23 @@ void QAbstractEventDispatcher::closingDown()
 */
 
 /*!
-    Sets the event filter \a filter. Returns a pointer to the filter
-    function previously defined.
-
-    The event filter is a function that receives all messages taken
-    from the system event loop before the event is dispatched to the
-    respective target. This includes messages that are not sent to Qt
+    Replaces the event filter function for this
+    QAbstractEventDispatcher with \a filter and returns the replaced
+    event filter function. Only the current event filter function is
+    called. If you want to use both filter functions, save the
+    replaced EventFilter in a place where yours can call it.
+
+    The event filter function set here is called for all messages
+    taken from the system event loop before the event is dispatched to
+    the respective target, including the messages not meant for Qt
     objects.
 
-    The function can return true to stop the event to be processed by
-    Qt, or false to continue with the standard event processing.
+    The event filter function should return true if the message should
+    be filtered, (i.e. stopped). It should return false to allow
+    processing the message to continue.
 
-    Only one filter can be defined, but the filter can use the return
-    value to call the previously set event filter. By default, no
-    filter is set (i.e. the function returns 0).
+    By default, no event filter function is set (i.e., this function
+    returns a null EventFilter the first time it is called).
 */
 QAbstractEventDispatcher::EventFilter QAbstractEventDispatcher::setEventFilter(EventFilter filter)
 {
diff --git a/src/corelib/kernel/qcore_unix_p.h b/src/corelib/kernel/qcore_unix_p.h
index 1bf2425..8d43897 100644
--- a/src/corelib/kernel/qcore_unix_p.h
+++ b/src/corelib/kernel/qcore_unix_p.h
@@ -69,19 +69,19 @@
 
 struct sockaddr;
 
-QT_BEGIN_NAMESPACE
-
 #if defined(Q_OS_LINUX) && defined(O_CLOEXEC) && defined(__GLIBC__) && (__GLIBC__ * 0x100 + __GLIBC_MINOR__) >= 0x0204
 // Linux supports thread-safe FD_CLOEXEC
 # define QT_UNIX_SUPPORTS_THREADSAFE_CLOEXEC 1
 
+QT_BEGIN_NAMESPACE
 namespace QtLibcSupplement {
     Q_CORE_EXPORT int accept4(int, sockaddr *, QT_SOCKLEN_T *, int flags);
     Q_CORE_EXPORT int dup3(int oldfd, int newfd, int flags);
     Q_CORE_EXPORT int pipe2(int pipes[], int flags);
 }
+QT_END_NAMESPACE
+using namespace QT_PREPEND_NAMESPACE(QtLibcSupplement);
 
-using namespace QtLibcSupplement;
 #else
 # define QT_UNIX_SUPPORTS_THREADSAFE_CLOEXEC 0
 #endif
@@ -91,6 +91,7 @@ using namespace QtLibcSupplement;
         var = cmd;                              \
     } while (var == -1 && errno == EINTR)
 
+QT_BEGIN_NAMESPACE
 
 // don't call QT_OPEN or ::open
 // call qt_safe_open
diff --git a/src/corelib/kernel/qcoreapplication.cpp b/src/corelib/kernel/qcoreapplication.cpp
index 054be70..706dc54 100644
--- a/src/corelib/kernel/qcoreapplication.cpp
+++ b/src/corelib/kernel/qcoreapplication.cpp
@@ -2183,21 +2183,37 @@ void QCoreApplication::removeLibraryPath(const QString &path)
 /*!
     \fn EventFilter QCoreApplication::setEventFilter(EventFilter filter)
 
-    Sets the event filter \a filter. Returns a pointer to the filter
-    function previously defined.
-
-    The event filter is a function that is called for every message
-    received in all threads. This does \e not include messages to
+    Replaces the event filter function for the QCoreApplication with
+    \a filter and returns the pointer to the replaced event filter
+    function. Only the current event filter function is called. If you
+    want to use both filter functions, save the replaced EventFilter
+    in a place where yours can call it.
+
+    The event filter function set here is called for all messages
+    received by all threads meant for all Qt objects. It is \e not
+    called for messages that are not meant for Qt objects.
+
+    The event filter function should return true if the message should
+    be filtered, (i.e. stopped). It should return false to allow
+    processing the message to continue.
+
+    By default, no event filter function is set (i.e., this function
+    returns a null EventFilter the first time it is called).
+    
+    \note The filter function set here receives native messages,
+    i.e. MSG or XEvent structs, that are going to Qt objects. It is
+    called by QCoreApplication::filterEvent(). If the filter function
+    returns false to indicate the message should be processed further,
+    the native message can then be translated into a QEvent and
+    handled by the standard Qt \l{QEvent} {event} filering, e.g.
+    QObject::installEventFilter().
+
+    \note The filter function set here is different form the filter
+    function set via QAbstractEventDispatcher::setEventFilter(), which
+    gets all messages received by its thread, even messages meant for
     objects that are not handled by Qt.
 
-    The function can return true to stop the event to be processed by
-    Qt, or false to continue with the standard event processing.
-
-    Only one filter can be defined, but the filter can use the return
-    value to call the previously set event filter. By default, no
-    filter is set (i.e., the function returns 0).
-
-    \sa installEventFilter()
+    \sa QObject::installEventFilter(), QAbstractEventDispatcher::setEventFilter()
 */
 QCoreApplication::EventFilter
 QCoreApplication::setEventFilter(QCoreApplication::EventFilter filter)
diff --git a/src/corelib/plugin/qplugin.h b/src/corelib/plugin/qplugin.h
index ff2b412..233b4f9 100644
--- a/src/corelib/plugin/qplugin.h
+++ b/src/corelib/plugin/qplugin.h
@@ -63,21 +63,6 @@ typedef QObject *(*QtPluginInstanceFunction)();
 
 void Q_CORE_EXPORT qRegisterStaticPluginInstanceFunction(QtPluginInstanceFunction function);
 
-struct qt_plugin_instance_deleter
-{
-    qt_plugin_instance_deleter(QPointer<QObject> &instance)
-        : instance_(instance)
-    {
-    }
-
-    ~qt_plugin_instance_deleter()
-    {
-        delete instance_;
-    }
-
-    QPointer<QObject> &instance_;
-};
-
 #define Q_IMPORT_PLUGIN(PLUGIN) \
         extern QT_PREPEND_NAMESPACE(QObject) *qt_plugin_instance_##PLUGIN(); \
         class Static##PLUGIN##PluginInstance{ \
@@ -91,10 +76,8 @@ struct qt_plugin_instance_deleter
 #define Q_PLUGIN_INSTANCE(IMPLEMENTATION) \
         { \
             static QT_PREPEND_NAMESPACE(QPointer)<QT_PREPEND_NAMESPACE(QObject)> _instance; \
-            if (!_instance) { \
-                static QT_PREPEND_NAMESPACE(qt_plugin_instance_deleter) deleter(_instance); \
+            if (!_instance)      \
                 _instance = new IMPLEMENTATION; \
-            } \
             return _instance; \
         }
 
diff --git a/src/corelib/thread/qthread.cpp b/src/corelib/thread/qthread.cpp
index 24522f2..2e31c6d 100644
--- a/src/corelib/thread/qthread.cpp
+++ b/src/corelib/thread/qthread.cpp
@@ -261,9 +261,14 @@ void QAdoptedThread::run()
     Returns the thread handle of the currently executing thread.
 
     \warning The handle returned by this function is used for internal
-    purposes and should not be used in any application code. On
-    Windows, the returned value is a pseudo-handle for the current
-    thread that cannot be used for numerical comparison.
+    purposes and should not be used in any application code.
+
+    \warning On Windows, the returned value is a pseudo-handle for the
+    current thread. It can't be used for numerical comparison. i.e.,
+    this function returns the DWORD (Windows-Thread ID) returned by
+    the Win32 function getCurrentThreadId(), not the HANDLE
+    (Windows-Thread HANDLE) returned by the Win32 function
+    getCurrentThread().
 */
 
 /*!
diff --git a/src/corelib/tools/qringbuffer_p.h b/src/corelib/tools/qringbuffer_p.h
index f3daca7..008c068 100644
--- a/src/corelib/tools/qringbuffer_p.h
+++ b/src/corelib/tools/qringbuffer_p.h
@@ -303,6 +303,9 @@ public:
 
     // read an unspecified amount (will read the first buffer)
     inline QByteArray read() {
+        if (bufferSize == 0)
+            return QByteArray();
+
         // multiple buffers, just take the first one
         if (head == 0 && tailBuffer != 0) {
             QByteArray qba = buffers.takeFirst();
@@ -325,7 +328,7 @@ public:
         // We can avoid by initializing the QRingBuffer with basicBlockSize of 0
         // and only using this read() function.
         QByteArray qba(readPointer(), nextDataBlockSize());
-        buffers.takeFirst();
+        buffers.removeFirst();
         head = 0;
         if (tailBuffer == 0) {
             buffers << QByteArray();
diff --git a/src/corelib/tools/qstring.h b/src/corelib/tools/qstring.h
index 6bb0d8e..235c603 100644
--- a/src/corelib/tools/qstring.h
+++ b/src/corelib/tools/qstring.h
@@ -1235,6 +1235,8 @@ inline int QStringRef::localeAwareCompare(const QStringRef &s1, const QStringRef
 
 QT_END_NAMESPACE
 
+QT_END_HEADER
+
 #ifdef QT_USE_FAST_CONCATENATION
 #include <QtCore/qstringbuilder.h>
 #endif
diff --git a/src/corelib/tools/qstringbuilder.h b/src/corelib/tools/qstringbuilder.h
index 852c072..3b43253 100644
--- a/src/corelib/tools/qstringbuilder.h
+++ b/src/corelib/tools/qstringbuilder.h
@@ -69,7 +69,7 @@ private:
 };
 
 
-template <typename T> class QConcatenable {};
+template <typename T> struct QConcatenable {};
 
 template <typename A, typename B>
 class QStringBuilder
@@ -202,6 +202,18 @@ template <> struct QConcatenable<const char *>
             *out++ = QLatin1Char(*a++);
     }
 };
+
+template <> struct QConcatenable<QByteArray>
+{
+    typedef QByteArray type;
+    static int size(const QByteArray &ba) { return qstrnlen(ba.constData(), ba.size()); }
+    static inline void appendTo(const QByteArray &ba, QChar *&out)
+    {
+        const char *data = ba.constData();
+        while (*data)
+            *out++ = QLatin1Char(*data++);
+    }
+};
 #endif
 
 template <typename A, typename B>
diff --git a/src/dbus/qdbusconnection.cpp b/src/dbus/qdbusconnection.cpp
index 6777aa5..14cadd9 100644
--- a/src/dbus/qdbusconnection.cpp
+++ b/src/dbus/qdbusconnection.cpp
@@ -973,8 +973,15 @@ QDBusConnection QDBusConnection::systemBus()
 }
 
 /*!
+  \nonreentrant
+
   Returns the connection that sent the signal, if called in a slot activated
   by QDBus; otherwise it returns 0.
+
+  \note Please avoid this function. This function is not thread-safe, so if
+  there's any other thread delivering a D-Bus call, this function may return
+  the wrong connection. In new code, please use QDBusContext::connection()
+  (see that class for a description on how to use it).
 */
 QDBusConnection QDBusConnection::sender()
 {
diff --git a/src/gui/dialogs/qfiledialog_p.h b/src/gui/dialogs/qfiledialog_p.h
index d798f9d..4c599cc 100644
--- a/src/gui/dialogs/qfiledialog_p.h
+++ b/src/gui/dialogs/qfiledialog_p.h
@@ -73,7 +73,6 @@
 #include <qabstractproxymodel.h>
 #include <qcompleter.h>
 #include <qpointer.h>
-#include <qtimeline.h>
 #include <qdebug.h>
 #include "qsidebar_p.h"
 
diff --git a/src/gui/dialogs/qsidebar.cpp b/src/gui/dialogs/qsidebar.cpp
index 1915e21..e4821ad 100644
--- a/src/gui/dialogs/qsidebar.cpp
+++ b/src/gui/dialogs/qsidebar.cpp
@@ -247,11 +247,16 @@ void QUrlModel::addUrls(const QList<QUrl> &list, int row, bool move)
         QUrl url = list.at(i);
         if (!url.isValid() || url.scheme() != QLatin1String("file"))
             continue;
+        //this makes sure the url is clean
+        const QString cleanUrl = QDir::cleanPath(url.toLocalFile());
+        url = QUrl::fromLocalFile(cleanUrl);
+
         for (int j = 0; move && j < rowCount(); ++j) {
+            QString local = index(j, 0).data(UrlRole).toUrl().toLocalFile();
 #if defined(Q_OS_WIN)
-            if (QDir::cleanPath(index(j, 0).data(UrlRole).toUrl().toLocalFile()).toLower() == QDir::cleanPath(url.toLocalFile()).toLower()) {
+            if (index(j, 0).data(UrlRole).toUrl().toLocalFile().toLower() == cleanUrl.toLower()) {
 #else
-            if (QDir::cleanPath(index(j, 0).data(UrlRole).toUrl().toLocalFile()) == QDir::cleanPath(url.toLocalFile())) {
+            if (index(j, 0).data(UrlRole).toUrl().toLocalFile() == cleanUrl) {
 #endif
                 removeRow(j);
                 if (j <= row)
@@ -260,12 +265,12 @@ void QUrlModel::addUrls(const QList<QUrl> &list, int row, bool move)
             }
         }
         row = qMax(row, 0);
-        QModelIndex idx = fileSystemModel->index(url.toLocalFile());
+        QModelIndex idx = fileSystemModel->index(cleanUrl);
         if (!fileSystemModel->isDir(idx))
             continue;
         insertRows(row, 1);
         setUrl(index(row, 0), url, idx);
-        watching.append(QPair<QModelIndex, QString>(idx, url.toLocalFile()));
+        watching.append(qMakePair(idx, cleanUrl));
     }
 }
 
diff --git a/src/gui/graphicsview/graphicsview.pri b/src/gui/graphicsview/graphicsview.pri
index 4cee6d6..0c0747e 100644
--- a/src/gui/graphicsview/graphicsview.pri
+++ b/src/gui/graphicsview/graphicsview.pri
@@ -1,37 +1,42 @@
 # Qt graphicsview module
-HEADERS += graphicsview/qgraphicsitem.h \
+HEADERS += graphicsview/qgraphicsgridlayout.h \
+    graphicsview/qgraphicsitem.h \
     graphicsview/qgraphicsitem_p.h \
     graphicsview/qgraphicsitemanimation.h \
-    graphicsview/qgraphicsscene.h \
-    graphicsview/qgraphicsscene_p.h \
-    graphicsview/qgraphicsscene_bsp_p.h \
-    graphicsview/qgraphicssceneevent.h \
-    graphicsview/qgraphicsview_p.h \
-    graphicsview/qgraphicsview.h
-SOURCES += graphicsview/qgraphicsitem.cpp \
-    graphicsview/qgraphicsitemanimation.cpp \
-    graphicsview/qgraphicsscene.cpp \
-    graphicsview/qgraphicsscene_bsp.cpp \
-    graphicsview/qgraphicssceneevent.cpp \
-    graphicsview/qgraphicsview.cpp
-
-# Widgets on the canvas
-HEADERS += graphicsview/qgraphicslayout.h \
+    graphicsview/qgraphicslayout.h \
     graphicsview/qgraphicslayout_p.h \
     graphicsview/qgraphicslayoutitem.h \
     graphicsview/qgraphicslayoutitem_p.h \
     graphicsview/qgraphicslinearlayout.h \
+    graphicsview/qgraphicsproxywidget.h \
+    graphicsview/qgraphicsscene.h \
+    graphicsview/qgraphicsscene_bsp_p.h \
+    graphicsview/qgraphicsscene_p.h \
+    graphicsview/qgraphicsscenebsptreeindex_p.h \
+    graphicsview/qgraphicssceneevent.h \
+    graphicsview/qgraphicssceneindex_p.h \
+    graphicsview/qgraphicsscenelinearindex_p.h \
+    graphicsview/qgraphicsview.h \
+    graphicsview/qgraphicsview_p.h \
     graphicsview/qgraphicswidget.h \
     graphicsview/qgraphicswidget_p.h \
-    graphicsview/qgridlayoutengine_p.h \
-    graphicsview/qgraphicsproxywidget.h \
-    graphicsview/qgraphicsgridlayout.h
-SOURCES += graphicsview/qgraphicslayout.cpp \
+    graphicsview/qgridlayoutengine_p.h
+
+SOURCES += graphicsview/qgraphicsgridlayout.cpp \
+    graphicsview/qgraphicsitem.cpp \
+    graphicsview/qgraphicsitemanimation.cpp \
+    graphicsview/qgraphicslayout.cpp \
     graphicsview/qgraphicslayout_p.cpp \
     graphicsview/qgraphicslayoutitem.cpp \
     graphicsview/qgraphicslinearlayout.cpp \
+    graphicsview/qgraphicsproxywidget.cpp \
+    graphicsview/qgraphicsscene.cpp \
+    graphicsview/qgraphicsscene_bsp.cpp \
+    graphicsview/qgraphicsscenebsptreeindex.cpp \
+    graphicsview/qgraphicssceneevent.cpp \
+    graphicsview/qgraphicssceneindex.cpp \
+    graphicsview/qgraphicsscenelinearindex.cpp \
+    graphicsview/qgraphicsview.cpp \
     graphicsview/qgraphicswidget.cpp \
     graphicsview/qgraphicswidget_p.cpp \
-    graphicsview/qgridlayoutengine.cpp \
-    graphicsview/qgraphicsproxywidget.cpp \
-    graphicsview/qgraphicsgridlayout.cpp
+    graphicsview/qgridlayoutengine.cpp
diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp
index a5ee7e6..03014d8 100644
--- a/src/gui/graphicsview/qgraphicsitem.cpp
+++ b/src/gui/graphicsview/qgraphicsitem.cpp
@@ -558,6 +558,7 @@
 #include "qgraphicsview.h"
 #include "qgraphicswidget.h"
 #include "qgraphicsproxywidget.h"
+#include "qgraphicsscenebsptreeindex_p.h"
 #include <QtCore/qbitarray.h>
 #include <QtCore/qdebug.h>
 #include <QtCore/qpoint.h>
@@ -588,17 +589,6 @@
 
 QT_BEGIN_NAMESPACE
 
-// QRectF::intersects() returns false always if either the source or target
-// rectangle's width or height are 0. This works around that problem.
-static inline void _q_adjustRect(QRectF *rect)
-{
-    Q_ASSERT(rect);
-    if (!rect->width())
-        rect->adjust(-0.00001, 0, 0.00001, 0);
-    if (!rect->height())
-        rect->adjust(0, -0.00001, 0, 0.00001);
-}
-
 static inline void _q_adjustRect(QRect *rect)
 {
     Q_ASSERT(rect);
@@ -832,6 +822,42 @@ void QGraphicsItemPrivate::combineTransformFromParent(QTransform *x, const QTran
     }
 }
 
+void QGraphicsItemPrivate::updateSceneTransformFromParent()
+{
+    if (parent) {
+        Q_ASSERT(!parent->d_ptr->dirtySceneTransform);
+        if (parent->d_ptr->sceneTransformTranslateOnly) {
+            sceneTransform = QTransform::fromTranslate(parent->d_ptr->sceneTransform.dx() + pos.x(),
+                                                       parent->d_ptr->sceneTransform.dy() + pos.y());
+        } else {
+            sceneTransform = parent->d_ptr->sceneTransform;
+            sceneTransform.translate(pos.x(), pos.y());
+        }
+        if (transformData) {
+            sceneTransform = transformData->computedFullTransform(&sceneTransform);
+            sceneTransformTranslateOnly = (sceneTransform.type() <= QTransform::TxTranslate);
+        } else {
+            sceneTransformTranslateOnly = parent->d_ptr->sceneTransformTranslateOnly;
+        }
+    } else if (!transformData) {
+        sceneTransform = QTransform::fromTranslate(pos.x(), pos.y());
+        sceneTransformTranslateOnly = 1;
+    } else if (transformData->onlyTransform) {
+        sceneTransform = transformData->transform;
+        if (!pos.isNull())
+            sceneTransform *= QTransform::fromTranslate(pos.x(), pos.y());
+        sceneTransformTranslateOnly = (sceneTransform.type() <= QTransform::TxTranslate);
+    } else if (pos.isNull()) {
+        sceneTransform = transformData->computedFullTransform();
+        sceneTransformTranslateOnly = (sceneTransform.type() <= QTransform::TxTranslate);
+    } else {
+        sceneTransform = QTransform::fromTranslate(pos.x(), pos.y());
+        sceneTransform = transformData->computedFullTransform(&sceneTransform);
+        sceneTransformTranslateOnly = (sceneTransform.type() <= QTransform::TxTranslate);
+    }
+    dirtySceneTransform = 0;
+}
+
 /*!
     \internal
 
@@ -871,6 +897,11 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent)
     if (newParent == parent)
         return;
 
+    if (scene) {
+        // Deliver the change to the index
+        scene->d_func()->index->itemChange(q, QGraphicsItem::ItemParentChange, newParentVariant);
+    }
+
     if (QGraphicsWidget *w = isWidget ? static_cast<QGraphicsWidget *>(q) : q->parentWidget()) {
         // Update the child focus chain; when reparenting a widget that has a
         // focus child, ensure that that focus child clears its focus child
@@ -958,12 +989,6 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent)
         }
     }
 
-    if (scene) {
-        // Invalidate any sort caching; arrival of a new item means we need to
-        // resort.
-        scene->d_func()->invalidateSortCache();
-    }
-
     // Resolve depth.
     resolveDepth(parent ? parent->d_ptr->depth : -1);
     dirtySceneTransform = 1;
@@ -1442,6 +1467,8 @@ void QGraphicsItem::setFlags(GraphicsItemFlags flags)
     flags = GraphicsItemFlags(itemChange(ItemFlagsChange, quint32(flags)).toUInt());
     if (quint32(d_ptr->flags) == quint32(flags))
         return;
+    if (d_ptr->scene)
+        d_ptr->scene->d_func()->index->itemChange(this, ItemFlagsChange, quint32(flags));
 
     // Flags that alter the geometry of the item (or its children).
     const quint32 geomChangeFlagsMask = (ItemClipsChildrenToShape | ItemClipsToShape | ItemIgnoresTransformations);
@@ -1800,6 +1827,8 @@ void QGraphicsItemPrivate::setVisibleHelper(bool newVisible, bool explicitly, bo
         if (q_ptr->isSelected())
             q_ptr->setSelected(false);
     } else {
+        geometryChanged = 1;
+        paintedViewBoundingRectsNeedRepaint = 1;
         if (isWidget && scene) {
             QGraphicsWidget *widget = static_cast<QGraphicsWidget *>(q_ptr);
             if (widget->windowType() == Qt::Popup)
@@ -3160,7 +3189,8 @@ void QGraphicsItem::setTransformOrigin(const QPointF &origin)
 */
 QMatrix QGraphicsItem::sceneMatrix() const
 {
-    return sceneTransform().toAffine();
+    d_ptr->ensureSceneTransform();
+    return d_ptr->sceneTransform.toAffine();
 }
 
 
@@ -3183,16 +3213,7 @@ QMatrix QGraphicsItem::sceneMatrix() const
 */
 QTransform QGraphicsItem::sceneTransform() const
 {
-    if (d_ptr->dirtySceneTransform) {
-        // This item and all its descendants have dirty scene transforms.
-        // We're about to validate this item's scene transform, so we have to
-        // invalidate all the children; otherwise there's no way for the descendants
-        // to detect that the ancestor has changed.
-        d_ptr->invalidateChildrenSceneTransform();
-    }
-
-    QGraphicsItem *that = const_cast<QGraphicsItem *>(this);
-    d_ptr->ensureSceneTransformRecursive(&that);
+    d_ptr->ensureSceneTransform();
     return d_ptr->sceneTransform;
 }
 
@@ -3222,8 +3243,10 @@ QTransform QGraphicsItem::sceneTransform() const
 QTransform QGraphicsItem::deviceTransform(const QTransform &viewportTransform) const
 {
     // Ensure we return the standard transform if we're not untransformable.
-    if (!d_ptr->itemIsUntransformable())
-        return sceneTransform() * viewportTransform;
+    if (!d_ptr->itemIsUntransformable()) {
+        d_ptr->ensureSceneTransform();
+        return d_ptr->sceneTransform * viewportTransform;
+    }
 
     // Find the topmost item that ignores view transformations.
     const QGraphicsItem *untransformedAncestor = this;
@@ -3242,7 +3265,8 @@ QTransform QGraphicsItem::deviceTransform(const QTransform &viewportTransform) c
     }
 
     // First translate the base untransformable item.
-    QPointF mappedPoint = (untransformedAncestor->sceneTransform() * viewportTransform).map(QPointF(0, 0));
+    untransformedAncestor->d_ptr->ensureSceneTransform();
+    QPointF mappedPoint = (untransformedAncestor->d_ptr->sceneTransform * viewportTransform).map(QPointF(0, 0));
 
     // COMBINE
     QTransform matrix = QTransform::fromTranslate(mappedPoint.x(), mappedPoint.y());
@@ -3335,8 +3359,11 @@ QTransform QGraphicsItem::itemTransform(const QGraphicsItem *other, bool *ok) co
     // Find the closest common ancestor. If the two items don't share an
     // ancestor, then the only way is to combine their scene transforms.
     const QGraphicsItem *commonAncestor = commonAncestorItem(other);
-    if (!commonAncestor)
-        return sceneTransform() * other->sceneTransform().inverted(ok);
+    if (!commonAncestor) {
+        d_ptr->ensureSceneTransform();
+        other->d_ptr->ensureSceneTransform();
+        return d_ptr->sceneTransform * other->d_ptr->sceneTransform.inverted(ok);
+    }
 
     // If the two items are cousins (in sibling branches), map both to the
     // common ancestor, and combine the two transforms.
@@ -3627,18 +3654,20 @@ void QGraphicsItem::setZValue(qreal z)
     qreal newZ = qreal(newZVariant.toDouble());
     if (newZ == d_ptr->z)
         return;
+
+    if (d_ptr->scene) {
+        // Z Value has changed, we have to notify the index.
+        d_ptr->scene->d_func()->index->itemChange(this, ItemZValueChange, newZVariant);
+    }
+
     d_ptr->z = newZ;
     if (d_ptr->parent)
         d_ptr->parent->d_ptr->needSortChildren = 1;
     else if (d_ptr->scene)
         d_ptr->scene->d_func()->needSortTopLevelItems = 1;
 
-    if (d_ptr->scene) {
+    if (d_ptr->scene)
         d_ptr->scene->d_func()->markDirty(this, QRectF(), /*invalidateChildren=*/true);
-        // Invalidate any sort caching; arrival of a new item means we need to
-        // resort.
-        d_ptr->scene->d_func()->invalidateSortCache();
-    }
 
     itemChange(ItemZValueHasChanged, newZVariant);
 
@@ -3729,7 +3758,13 @@ QRectF QGraphicsItem::sceneBoundingRect() const
 
     QRectF br = boundingRect();
     br.translate(offset);
-    return !parentItem ? br : parentItem->sceneTransform().mapRect(br);
+    if (!parentItem)
+        return br;
+    if (parentItem->d_ptr->hasTranslateOnlySceneTransform()) {
+        br.translate(parentItem->d_ptr->sceneTransform.dx(), parentItem->d_ptr->sceneTransform.dy());
+        return br;
+    }
+    return parentItem->d_ptr->sceneTransform.mapRect(br);
 }
 
 /*!
@@ -4104,7 +4139,7 @@ bool QGraphicsItem::isObscuredBy(const QGraphicsItem *item) const
 {
     if (!item)
         return false;
-    return QGraphicsScenePrivate::closestItemFirst_withoutCache(item, this)
+    return QGraphicsSceneBspTreeIndexPrivate::closestItemFirst_withoutCache(item, this)
         && qt_QGraphicsItem_isObscured(this, item, boundingRect());
 }
 
@@ -4297,12 +4332,11 @@ bool QGraphicsItemPrivate::discardUpdateRequest(bool ignoreClipping, bool ignore
 {
     // No scene, or if the scene is updating everything, means we have nothing
     // to do. The only exception is if the scene tracks the growing scene rect.
-    return (!visible && !ignoreVisibleBit)
+    return !scene
+           || (!visible && !ignoreVisibleBit && !this->ignoreVisible)
            || (!ignoreDirtyBit && fullUpdatePending)
-           || !scene
-           || (scene->d_func()->updateAll && scene->d_func()->hasSceneRect)
            || (!ignoreClipping && (childrenClippedToShape() && isClippedAway()))
-           || (!ignoreOpacity && childrenCombineOpacity() && isFullyTransparent());
+           || (!ignoreOpacity && !this->ignoreOpacity && childrenCombineOpacity() && isFullyTransparent());
 }
 
 /*!
@@ -4323,6 +4357,7 @@ void QGraphicsItemPrivate::resolveDepth(int parentDepth)
 void QGraphicsItemPrivate::addChild(QGraphicsItem *child)
 {
     needSortChildren = 1;
+    child->d_ptr->siblingIndex = children.size();
     children.append(child);
 }
 
@@ -4332,6 +4367,10 @@ void QGraphicsItemPrivate::addChild(QGraphicsItem *child)
 void QGraphicsItemPrivate::removeChild(QGraphicsItem *child)
 {
     children.removeOne(child);
+    // NB! Do not use children.removeAt(child->d_ptr->siblingIndex) because
+    // the child is not guaranteed to be at the index after the list is sorted.
+    // (see ensureSortedChildren()).
+    child->d_ptr->siblingIndex = -1;
 }
 
 /*!
@@ -4492,9 +4531,22 @@ void QGraphicsItemPrivate::ensureSceneTransformRecursive(QGraphicsItem **topMost
     }
 
     // COMBINE my transform with the parent's scene transform.
-    sceneTransform = parent ? parent->d_ptr->sceneTransform : QTransform();
-    combineTransformFromParent(&sceneTransform);
-    dirtySceneTransform = 0;
+    updateSceneTransformFromParent();
+    Q_ASSERT(!dirtySceneTransform);
+}
+
+void QGraphicsItemPrivate::ensureSceneTransform()
+{
+    if (dirtySceneTransform) {
+        // This item and all its descendants have dirty scene transforms.
+        // We're about to validate this item's scene transform, so we have to
+        // invalidate all the children; otherwise there's no way for the descendants
+        // to detect that the ancestor has changed.
+        invalidateChildrenSceneTransform();
+    }
+
+    QGraphicsItem *that = q_func();
+    ensureSceneTransformRecursive(&that);
 }
 
 /*!
@@ -4835,7 +4887,9 @@ QPointF QGraphicsItem::mapToParent(const QPointF &point) const
 */
 QPointF QGraphicsItem::mapToScene(const QPointF &point) const
 {
-    return sceneTransform().map(point);
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return QPointF(point.x() + d_ptr->sceneTransform.dx(), point.y() + d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.map(point);
 }
 
 /*!
@@ -4902,7 +4956,9 @@ QPolygonF QGraphicsItem::mapToParent(const QRectF &rect) const
 */
 QPolygonF QGraphicsItem::mapToScene(const QRectF &rect) const
 {
-    return sceneTransform().map(rect);
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return rect.translated(d_ptr->sceneTransform.dx(), d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.map(rect);
 }
 
 /*!
@@ -4975,7 +5031,9 @@ QRectF QGraphicsItem::mapRectToParent(const QRectF &rect) const
 */
 QRectF QGraphicsItem::mapRectToScene(const QRectF &rect) const
 {
-    return sceneTransform().mapRect(rect);
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return rect.translated(d_ptr->sceneTransform.dx(), d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.mapRect(rect);
 }
 
 /*!
@@ -5049,7 +5107,9 @@ QRectF QGraphicsItem::mapRectFromParent(const QRectF &rect) const
 */
 QRectF QGraphicsItem::mapRectFromScene(const QRectF &rect) const
 {
-    return sceneTransform().inverted().mapRect(rect);
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return rect.translated(-d_ptr->sceneTransform.dx(), -d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.inverted().mapRect(rect);
 }
 
 /*!
@@ -5101,7 +5161,9 @@ QPolygonF QGraphicsItem::mapToParent(const QPolygonF &polygon) const
 */
 QPolygonF QGraphicsItem::mapToScene(const QPolygonF &polygon) const
 {
-    return sceneTransform().map(polygon);
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return polygon.translated(d_ptr->sceneTransform.dx(), d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.map(polygon);
 }
 
 /*!
@@ -5146,7 +5208,9 @@ QPainterPath QGraphicsItem::mapToParent(const QPainterPath &path) const
 */
 QPainterPath QGraphicsItem::mapToScene(const QPainterPath &path) const
 {
-    return sceneTransform().map(path);
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return path.translated(d_ptr->sceneTransform.dx(), d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.map(path);
 }
 
 /*!
@@ -5207,7 +5271,9 @@ QPointF QGraphicsItem::mapFromParent(const QPointF &point) const
 */
 QPointF QGraphicsItem::mapFromScene(const QPointF &point) const
 {
-    return sceneTransform().inverted().map(point);
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return QPointF(point.x() - d_ptr->sceneTransform.dx(), point.y() - d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.inverted().map(point);
 }
 
 /*!
@@ -5275,7 +5341,9 @@ QPolygonF QGraphicsItem::mapFromParent(const QRectF &rect) const
 */
 QPolygonF QGraphicsItem::mapFromScene(const QRectF &rect) const
 {
-    return sceneTransform().inverted().map(rect);
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return rect.translated(-d_ptr->sceneTransform.dx(), -d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.inverted().map(rect);
 }
 
 /*!
@@ -5325,7 +5393,9 @@ QPolygonF QGraphicsItem::mapFromParent(const QPolygonF &polygon) const
 */
 QPolygonF QGraphicsItem::mapFromScene(const QPolygonF &polygon) const
 {
-    return sceneTransform().inverted().map(polygon);
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return polygon.translated(-d_ptr->sceneTransform.dx(), -d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.inverted().map(polygon);
 }
 
 /*!
@@ -5368,7 +5438,9 @@ QPainterPath QGraphicsItem::mapFromParent(const QPainterPath &path) const
 */
 QPainterPath QGraphicsItem::mapFromScene(const QPainterPath &path) const
 {
-    return sceneTransform().inverted().map(path);
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return path.translated(-d_ptr->sceneTransform.dx(), -d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.inverted().map(path);
 }
 
 /*!
@@ -6333,7 +6405,7 @@ void QGraphicsItem::addToIndex()
         return;
     }
     if (d_ptr->scene)
-        d_ptr->scene->d_func()->addToIndex(this);
+        d_ptr->scene->d_func()->index->addItem(this);
 }
 
 /*!
@@ -6350,7 +6422,7 @@ void QGraphicsItem::removeFromIndex()
         return;
     }
     if (d_ptr->scene)
-        d_ptr->scene->d_func()->removeFromIndex(this);
+        d_ptr->scene->d_func()->index->removeItem(this);
 }
 
 /*!
@@ -6369,10 +6441,12 @@ void QGraphicsItem::removeFromIndex()
 void QGraphicsItem::prepareGeometryChange()
 {
     if (d_ptr->scene) {
+        d_ptr->scene->d_func()->dirtyGrowingItemsBoundingRect = true;
         d_ptr->geometryChanged = 1;
         d_ptr->paintedViewBoundingRectsNeedRepaint = 1;
 
         QGraphicsScenePrivate *scenePrivate = d_ptr->scene->d_func();
+        scenePrivate->index->prepareBoundingRectChange(this);
         scenePrivate->markDirty(this, QRectF(),
                                 /*invalidateChildren=*/true,
                                 /*maybeDirtyClipPath=*/!d_ptr->inSetPosHelper);
@@ -6383,10 +6457,13 @@ void QGraphicsItem::prepareGeometryChange()
         // _q_processDirtyItems is called before _q_emitUpdated.
         if ((scenePrivate->connectedSignals & scenePrivate->changedSignalMask)
             || scenePrivate->views.isEmpty()) {
-            d_ptr->scene->update(sceneTransform().mapRect(boundingRect()));
+            if (d_ptr->hasTranslateOnlySceneTransform()) {
+                d_ptr->scene->update(boundingRect().translated(d_ptr->sceneTransform.dx(),
+                                                               d_ptr->sceneTransform.dy()));
+            } else {
+                d_ptr->scene->update(d_ptr->sceneTransform.mapRect(boundingRect()));
+            }
         }
-
-        scenePrivate->removeFromIndex(this);
     }
 
     QGraphicsItem *parent = this;
@@ -9706,17 +9783,11 @@ QDebug operator<<(QDebug debug, QGraphicsItem *item)
         return debug;
     }
 
-    QStringList flags;
-    if (item->isVisible()) flags << QLatin1String("isVisible");
-    if (item->isEnabled()) flags << QLatin1String("isEnabled");
-    if (item->isSelected()) flags << QLatin1String("isSelected");
-    if (item->hasFocus()) flags << QLatin1String("HasFocus");
-
     debug << "QGraphicsItem(this =" << ((void*)item)
           << ", parent =" << ((void*)item->parentItem())
           << ", pos =" << item->pos()
-          << ", z =" << item->zValue() << ", flags = {"
-          << flags.join(QLatin1String("|")) << " })";
+          << ", z =" << item->zValue() << ", flags = "
+          << item->flags() << ")";
     return debug;
 }
 
diff --git a/src/gui/graphicsview/qgraphicsitem.h b/src/gui/graphicsview/qgraphicsitem.h
index d26110a..72c4830 100644
--- a/src/gui/graphicsview/qgraphicsitem.h
+++ b/src/gui/graphicsview/qgraphicsitem.h
@@ -142,7 +142,7 @@ public:
 
     QGraphicsItem(QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                  // obsolete argument
+                  // ### obsolete argument
                   , QGraphicsScene *scene = 0
 #endif
         );
@@ -209,8 +209,8 @@ public:
     Qt::MouseButtons acceptedMouseButtons() const;
     void setAcceptedMouseButtons(Qt::MouseButtons buttons);
 
-    bool acceptsHoverEvents() const; // obsolete
-    void setAcceptsHoverEvents(bool enabled); // obsolete
+    bool acceptsHoverEvents() const; // ### obsolete
+    void setAcceptsHoverEvents(bool enabled); // ### obsolete
     bool acceptHoverEvents() const;
     void setAcceptHoverEvents(bool enabled);
     bool acceptTouchEvents() const;
@@ -437,11 +437,16 @@ private:
     friend class QGraphicsScene;
     friend class QGraphicsScenePrivate;
     friend class QGraphicsSceneFindItemBspTreeVisitor;
+    friend class QGraphicsSceneBspTree;
     friend class QGraphicsView;
     friend class QGraphicsViewPrivate;
     friend class QGraphicsWidget;
     friend class QGraphicsWidgetPrivate;
     friend class QGraphicsProxyWidgetPrivate;
+    friend class QGraphicsSceneIndex;
+    friend class QGraphicsSceneIndexPrivate;
+    friend class QGraphicsSceneBspTreeIndex;
+    friend class QGraphicsSceneBspTreeIndexPrivate;
     friend class ::tst_QGraphicsItem;
     friend bool qt_closestLeaf(const QGraphicsItem *, const QGraphicsItem *);
     friend bool qt_closestItemFirst(const QGraphicsItem *, const QGraphicsItem *);
@@ -533,7 +538,7 @@ class Q_GUI_EXPORT QAbstractGraphicsShapeItem : public QGraphicsItem
 public:
     QAbstractGraphicsShapeItem(QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                               // obsolete argument
+                               // ### obsolete argument
                                , QGraphicsScene *scene = 0
 #endif
         );
@@ -563,13 +568,13 @@ class Q_GUI_EXPORT QGraphicsPathItem : public QAbstractGraphicsShapeItem
 public:
     QGraphicsPathItem(QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                      // obsolete argument
+                      // ### obsolete argument
                       , QGraphicsScene *scene = 0
 #endif
         );
     QGraphicsPathItem(const QPainterPath &path, QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                      // obsolete argument
+                      // ### obsolete argument
                       , QGraphicsScene *scene = 0
 #endif
         );
@@ -606,19 +611,19 @@ class Q_GUI_EXPORT QGraphicsRectItem : public QAbstractGraphicsShapeItem
 public:
     QGraphicsRectItem(QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                      // obsolete argument
+                      // ### obsolete argument
                       , QGraphicsScene *scene = 0
 #endif
         );
     QGraphicsRectItem(const QRectF &rect, QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                      // obsolete argument
+                      // ### obsolete argument
                       , QGraphicsScene *scene = 0
 #endif
         );
     QGraphicsRectItem(qreal x, qreal y, qreal w, qreal h, QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                      // obsolete argument
+                      // ### obsolete argument
                       , QGraphicsScene *scene = 0
 #endif
         );
@@ -659,19 +664,19 @@ class Q_GUI_EXPORT QGraphicsEllipseItem : public QAbstractGraphicsShapeItem
 public:
     QGraphicsEllipseItem(QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                         // obsolete argument
+                         // ### obsolete argument
                          , QGraphicsScene *scene = 0
 #endif
         );
     QGraphicsEllipseItem(const QRectF &rect, QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                         // obsolete argument
+                         // ### obsolete argument
                          , QGraphicsScene *scene = 0
 #endif
         );
     QGraphicsEllipseItem(qreal x, qreal y, qreal w, qreal h, QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                         // obsolete argument
+                         // ### obsolete argument
                          , QGraphicsScene *scene = 0
 #endif
         );
@@ -718,14 +723,14 @@ class Q_GUI_EXPORT QGraphicsPolygonItem : public QAbstractGraphicsShapeItem
 public:
     QGraphicsPolygonItem(QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                         // obsolete argument
+                         // ### obsolete argument
                          , QGraphicsScene *scene = 0
 #endif
         );
     QGraphicsPolygonItem(const QPolygonF &polygon,
                          QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                         // obsolete argument
+                         // ### obsolete argument
                          , QGraphicsScene *scene = 0
 #endif
         );
@@ -765,19 +770,19 @@ class Q_GUI_EXPORT QGraphicsLineItem : public QGraphicsItem
 public:
     QGraphicsLineItem(QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                      // obsolete argument
+                      // ### obsolete argument
                       , QGraphicsScene *scene = 0
 #endif
         );
     QGraphicsLineItem(const QLineF &line, QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                      // obsolete argument
+                      // ### obsolete argument
                       , QGraphicsScene *scene = 0
 #endif
         );
     QGraphicsLineItem(qreal x1, qreal y1, qreal x2, qreal y2, QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                      // obsolete argument
+                      // ### obsolete argument
                       , QGraphicsScene *scene = 0
 #endif
         );
@@ -825,13 +830,13 @@ public:
 
     QGraphicsPixmapItem(QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                        // obsolete argument
+                        // ### obsolete argument
                         , QGraphicsScene *scene = 0
 #endif
         );
     QGraphicsPixmapItem(const QPixmap &pixmap, QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                        // obsolete argument
+                        // ### obsolete argument
                         , QGraphicsScene *scene = 0
 #endif
         );
@@ -887,13 +892,13 @@ class Q_GUI_EXPORT QGraphicsTextItem : public QGraphicsObject
 public:
     QGraphicsTextItem(QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                      // obsolete argument
+                      // ### obsolete argument
                       , QGraphicsScene *scene = 0
 #endif
         );
     QGraphicsTextItem(const QString &text, QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                      // obsolete argument
+                      // ### obsolete argument
                       , QGraphicsScene *scene = 0
 #endif
         );
@@ -988,13 +993,13 @@ class Q_GUI_EXPORT QGraphicsSimpleTextItem : public QAbstractGraphicsShapeItem
 public:
     QGraphicsSimpleTextItem(QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                            // obsolete argument
+                            // ### obsolete argument
                             , QGraphicsScene *scene = 0
 #endif
         );
     QGraphicsSimpleTextItem(const QString &text, QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                            // obsolete argument
+                            // ### obsolete argument
                             , QGraphicsScene *scene = 0
 #endif
         );
@@ -1034,7 +1039,7 @@ class Q_GUI_EXPORT QGraphicsItemGroup : public QGraphicsItem
 public:
     QGraphicsItemGroup(QGraphicsItem *parent = 0
 #ifndef Q_QDOC
-                       // obsolete argument
+                       // ### obsolete argument
                        , QGraphicsScene *scene = 0
 #endif
         );
diff --git a/src/gui/graphicsview/qgraphicsitem_p.h b/src/gui/graphicsview/qgraphicsitem_p.h
index 46ec6fe..9bdd273 100644
--- a/src/gui/graphicsview/qgraphicsitem_p.h
+++ b/src/gui/graphicsview/qgraphicsitem_p.h
@@ -119,6 +119,7 @@ public:
         parent(0),
         transformData(0),
         index(-1),
+        siblingIndex(-1),
         depth(0),
         acceptedMouseButtons(0x1f),
         visible(1),
@@ -149,13 +150,14 @@ public:
         dirtyChildrenBoundingRect(1),
         paintedViewBoundingRectsNeedRepaint(0),
         dirtySceneTransform(1),
-        geometryChanged(0),
+        geometryChanged(1),
         inDestructor(0),
         isObject(0),
         ignoreVisible(0),
         ignoreOpacity(0),
         acceptTouchEvents(0),
         acceptedTouchBeginEvent(0),
+        sceneTransformTranslateOnly(0),
         globalStackingOrder(-1),
         q_ptr(0)
     {
@@ -164,6 +166,15 @@ public:
     inline virtual ~QGraphicsItemPrivate()
     { }
 
+    static const QGraphicsItemPrivate *get(const QGraphicsItem *item)
+    {
+        return item->d_ptr;
+    }
+    static QGraphicsItemPrivate *get(QGraphicsItem *item)
+    {
+        return item->d_ptr;
+    }
+
     void updateAncestorFlag(QGraphicsItem::GraphicsItemFlag childFlag,
                             AncestorFlag flag = NoFlag, bool enabled = false, bool root = true);
     void setIsMemberOfGroup(bool enabled);
@@ -177,6 +188,7 @@ public:
 
     void combineTransformToParent(QTransform *x, const QTransform *viewTransform = 0) const;
     void combineTransformFromParent(QTransform *x, const QTransform *viewTransform = 0) const;
+    void updateSceneTransformFromParent();
 
     // ### Qt 5: Remove. Workaround for reimplementation added after Qt 4.4.
     virtual QVariant inputMethodQueryHelper(Qt::InputMethodQuery query) const;
@@ -286,6 +298,13 @@ public:
     void invalidateCachedClipPathRecursively(bool childrenOnly = false, const QRectF &emptyIfOutsideThisRect = QRectF());
     void updateCachedClipPathFromSetPosHelper(const QPointF &newPos);
     void ensureSceneTransformRecursive(QGraphicsItem **topMostDirtyItem);
+    void ensureSceneTransform();
+
+    inline bool hasTranslateOnlySceneTransform()
+    {
+        ensureSceneTransform();
+        return sceneTransformTranslateOnly;
+    }
 
     inline void invalidateChildrenSceneTransform()
     {
@@ -370,6 +389,7 @@ public:
     }
 
     inline QTransform transformToParent() const;
+    inline void ensureSortedChildren();
 
     QPainterPath cachedClipPath;
     QRectF childrenBoundingRect;
@@ -385,6 +405,7 @@ public:
     TransformData *transformData;
     QTransform sceneTransform;
     int index;
+    int siblingIndex;
     int depth;
 
     // Packed 32 bytes
@@ -426,7 +447,8 @@ public:
     quint32 ignoreOpacity : 1;
     quint32 acceptTouchEvents : 1;
     quint32 acceptedTouchBeginEvent : 1;
-    quint32 unused : 9; // feel free to use
+    quint32 sceneTransformTranslateOnly : 1;
+    quint32 unused : 8; // feel free to use
 
     // Optional stacking order
     int globalStackingOrder;
@@ -457,6 +479,10 @@ struct QGraphicsItemPrivate::TransformData {
         if (onlyTransform) {
             if (!postmultiplyTransform)
                 return transform;
+            if (postmultiplyTransform->isIdentity())
+                return transform;
+            if (transform.isIdentity())
+                return *postmultiplyTransform;
             QTransform x(transform);
             x *= *postmultiplyTransform;
             return x;
@@ -477,6 +503,29 @@ struct QGraphicsItemPrivate::TransformData {
     }
 };
 
+/*!
+    \internal
+*/
+inline bool qt_closestLeaf(const QGraphicsItem *item1, const QGraphicsItem *item2)
+{
+    // Return true if sibling item1 is on top of item2.
+    const QGraphicsItemPrivate *d1 = item1->d_ptr;
+    const QGraphicsItemPrivate *d2 = item2->d_ptr;
+    bool f1 = d1->flags & QGraphicsItem::ItemStacksBehindParent;
+    bool f2 = d2->flags & QGraphicsItem::ItemStacksBehindParent;
+    if (f1 != f2)
+        return f2;
+    if (d1->z != d2->z)
+        return d1->z > d2->z;
+    return d1->siblingIndex > d2->siblingIndex;
+}
+
+/*!
+    \internal
+*/
+static inline bool qt_notclosestLeaf(const QGraphicsItem *item1, const QGraphicsItem *item2)
+{ return qt_closestLeaf(item2, item1); }
+
 /*
    return the full transform of the item to the parent.  This include the position and all the transform data
 */
@@ -487,6 +536,14 @@ inline QTransform QGraphicsItemPrivate::transformToParent() const
     return matrix;
 }
 
+inline void QGraphicsItemPrivate::ensureSortedChildren()
+{
+    if (needSortChildren) {
+        qSort(children.begin(), children.end(), qt_notclosestLeaf);
+        needSortChildren = 0;
+    }
+}
+
 QT_END_NAMESPACE
 
 #endif // QT_NO_GRAPHICSVIEW
diff --git a/src/gui/graphicsview/qgraphicsscene.cpp b/src/gui/graphicsview/qgraphicsscene.cpp
index 0c3abd4..c8e178a 100644
--- a/src/gui/graphicsview/qgraphicsscene.cpp
+++ b/src/gui/graphicsview/qgraphicsscene.cpp
@@ -39,7 +39,6 @@
 **
 ****************************************************************************/
 
-
 /*!
     \class QGraphicsScene
     \brief The QGraphicsScene class provides a surface for managing a large
@@ -218,6 +217,9 @@
 #include "qgraphicsview_p.h"
 #include "qgraphicswidget.h"
 #include "qgraphicswidget_p.h"
+#include "qgraphicssceneindex_p.h"
+#include "qgraphicsscenebsptreeindex_p.h"
+#include "qgraphicsscenelinearindex_p.h"
 
 #include <QtCore/qdebug.h>
 #include <QtCore/qlist.h>
@@ -251,67 +253,6 @@
 
 QT_BEGIN_NAMESPACE
 
-static inline bool qt_notclosestLeaf(const QGraphicsItem *item1, const QGraphicsItem *item2);
-
-static inline bool QRectF_intersects(const QRectF &s, const QRectF &r)
-{
-    qreal xp = s.left();
-    qreal yp = s.top();
-    qreal w = s.width();
-    qreal h = s.height();
-    qreal l1 = xp;
-    qreal r1 = xp;
-    if (w < 0)
-        l1 += w;
-    else
-        r1 += w;
-
-    qreal l2 = r.left();
-    qreal r2 = r.left();
-    if (w < 0)
-        l2 += r.width();
-    else
-        r2 += r.width();
-
-    if (l1 >= r2 || l2 >= r1)
-        return false;
-
-    qreal t1 = yp;
-    qreal b1 = yp;
-    if (h < 0)
-        t1 += h;
-    else
-        b1 += h;
-
-    qreal t2 = r.top();
-    qreal b2 = r.top();
-    if (r.height() < 0)
-        t2 += r.height();
-    else
-        b2 += r.height();
-
-    return !(t1 >= b2 || t2 >= b1);
-}
-
-// QRectF::intersects() returns false always if either the source or target
-// rectangle's width or height are 0. This works around that problem.
-static inline void _q_adjustRect(QRectF *rect)
-{
-    Q_ASSERT(rect);
-    if (!rect->width())
-        rect->adjust(-0.00001, 0, 0.00001, 0);
-    if (!rect->height())
-        rect->adjust(0, -0.00001, 0, 0.00001);
-}
-
-static inline QRectF adjustedItemBoundingRect(const QGraphicsItem *item)
-{
-    Q_ASSERT(item);
-    QRectF boundingRect(item->boundingRect());
-    _q_adjustRect(&boundingRect);
-    return boundingRect;
-}
-
 static void _q_hoverFromMouseEvent(QGraphicsSceneHoverEvent *hover, const QGraphicsSceneMouseEvent *mouseEvent)
 {
     hover->setWidget(mouseEvent->widget());
@@ -331,18 +272,15 @@ static void _q_hoverFromMouseEvent(QGraphicsSceneHoverEvent *hover, const QGraph
 QGraphicsScenePrivate::QGraphicsScenePrivate()
     : changedSignalMask(0),
       indexMethod(QGraphicsScene::BspTreeIndex),
-      bspTreeDepth(0),
+      index(0),
       lastItemCount(0),
       hasSceneRect(false),
+      dirtyGrowingItemsBoundingRect(true),
       updateAll(false),
       calledEmitUpdated(false),
       processDirtyItemsEmitted(false),
       selectionChanging(0),
       needSortTopLevelItems(true),
-      regenerateIndex(true),
-      purgePending(false),
-      indexTimerId(0),
-      restartIndexTimer(false),
       stickyFocus(false),
       hasFocus(false),
       focusItem(0),
@@ -359,7 +297,6 @@ QGraphicsScenePrivate::QGraphicsScenePrivate()
       allItemsUseDefaultCursor(true),
       painterStateProtection(true),
       sortCacheEnabled(false),
-      updatingSortCache(false),
       style(0),
       allItemsIgnoreTouchEvents(true)
 {
@@ -372,6 +309,8 @@ void QGraphicsScenePrivate::init()
 {
     Q_Q(QGraphicsScene);
 
+    index = new QGraphicsSceneBspTreeIndex(q);
+
     // Keep this index so we can check for connected slots later on.
     changedSignalMask = (1 << q->metaObject()->indexOfSignal("changed(QList<QRectF>)"));
     qApp->d_func()->scene_list.append(q);
@@ -381,223 +320,25 @@ void QGraphicsScenePrivate::init()
 /*!
     \internal
 */
-QList<QGraphicsItem *> QGraphicsScenePrivate::estimateItemsInRect(const QRectF &rect) const
-{
-    const_cast<QGraphicsScenePrivate *>(this)->purgeRemovedItems();
-    const_cast<QGraphicsScenePrivate *>(this)->_q_updateSortCache();
-
-    if (indexMethod == QGraphicsScene::BspTreeIndex) {
-        // ### Only do this once in a while.
-        QGraphicsScenePrivate *that = const_cast<QGraphicsScenePrivate *>(this);
-
-        // Get items from BSP tree
-        QList<QGraphicsItem *> items = that->bspTree.items(rect);
-
-        // Fill in with any unindexed items
-        for (int i = 0; i < unindexedItems.size(); ++i) {
-            if (QGraphicsItem *item = unindexedItems.at(i)) {
-                if (!item->d_ptr->itemDiscovered && item->d_ptr->visible && !(item->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren)) {
-                    QRectF boundingRect = item->sceneBoundingRect();
-                    if (QRectF_intersects(boundingRect, rect)) {
-                        item->d_ptr->itemDiscovered = 1;
-                        items << item;
-                    }
-                }
-            }
-        }
-
-        // Reset the discovered state of all discovered items
-        for (int i = 0; i < items.size(); ++i)
-            items.at(i)->d_func()->itemDiscovered = 0;
-        return items;
-    }
-
-    QList<QGraphicsItem *> itemsInRect;
-    for (int i = 0; i < unindexedItems.size(); ++i) {
-        if (QGraphicsItem *item = unindexedItems.at(i)) {
-            if (item->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren)
-                continue;
-            if (item->d_ptr->visible && !item->d_ptr->isFullyTransparent())
-                itemsInRect << item;
-        }
-    }
-    for (int i = 0; i < indexedItems.size(); ++i) {
-        if (QGraphicsItem *item = indexedItems.at(i)) {
-            if (item->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren)
-                continue;
-            if (item->d_ptr->visible && !item->d_ptr->isFullyTransparent())
-                itemsInRect << item;
-        }
-    }
-
-    return itemsInRect;
-}
-
-/*!
-    \internal
-*/
-void QGraphicsScenePrivate::addToIndex(QGraphicsItem *item)
-{
-    if (indexMethod == QGraphicsScene::BspTreeIndex) {
-        if (item->d_func()->index != -1) {
-            bspTree.insertItem(item, item->sceneBoundingRect());
-            foreach (QGraphicsItem *child, item->children())
-                child->addToIndex();
-        } else {
-            // The BSP tree is regenerated if the number of items grows to a
-            // certain threshold, or if the bounding rect of the graph doubles in
-            // size.
-            startIndexTimer();
-        }
-    }
-}
-
-/*!
-    \internal
-*/
-void QGraphicsScenePrivate::removeFromIndex(QGraphicsItem *item)
-{
-    if (indexMethod == QGraphicsScene::BspTreeIndex) {
-        int index = item->d_func()->index;
-        if (index != -1) {
-            bspTree.removeItem(item, item->sceneBoundingRect());
-            freeItemIndexes << index;
-            indexedItems[index] = 0;
-            item->d_func()->index = -1;
-            unindexedItems << item;
-
-            foreach (QGraphicsItem *child, item->children())
-                child->removeFromIndex();
-        }
-
-        startIndexTimer();
-    }
-}
-
-/*!
-    \internal
-*/
-void QGraphicsScenePrivate::resetIndex()
-{
-    purgeRemovedItems();
-    if (indexMethod == QGraphicsScene::BspTreeIndex) {
-        for (int i = 0; i < indexedItems.size(); ++i) {
-            if (QGraphicsItem *item = indexedItems.at(i)) {
-                item->d_ptr->index = -1;
-                unindexedItems << item;
-            }
-        }
-        indexedItems.clear();
-        freeItemIndexes.clear();
-        regenerateIndex = true;
-        startIndexTimer();
-    }
-}
-
-static inline int intmaxlog(int n)
+QGraphicsScenePrivate *QGraphicsScenePrivate::get(QGraphicsScene *q)
 {
-    return  (n > 0 ? qMax(qCeil(qLn(qreal(n)) / qLn(qreal(2))), 5) : 0);
+    return q->d_func();
 }
 
-/*!
-    \internal
-*/
-void QGraphicsScenePrivate::_q_updateIndex()
+void QGraphicsScenePrivate::_q_emitUpdated()
 {
-    if (!indexTimerId)
-        return;
-
     Q_Q(QGraphicsScene);
-    q->killTimer(indexTimerId);
-    indexTimerId = 0;
-
-    purgeRemovedItems();
-
-    // Add unindexedItems to indexedItems
-    QRectF unindexedItemsBoundingRect;
-    for (int i = 0; i < unindexedItems.size(); ++i) {
-        if (QGraphicsItem *item = unindexedItems.at(i)) {
-            unindexedItemsBoundingRect |= item->sceneBoundingRect();
-            if (!freeItemIndexes.isEmpty()) {
-                int freeIndex = freeItemIndexes.takeFirst();
-                item->d_func()->index = freeIndex;
-                indexedItems[freeIndex] = item;
-            } else {
-                item->d_func()->index = indexedItems.size();
-                indexedItems << item;
-            }
-        }
-    }
-
-    // Update growing scene rect.
-    QRectF oldGrowingItemsBoundingRect = growingItemsBoundingRect;
-    growingItemsBoundingRect |= unindexedItemsBoundingRect;
-
-    // Determine whether we should regenerate the BSP tree.
-    if (indexMethod == QGraphicsScene::BspTreeIndex) {
-        int depth = bspTreeDepth;
-        if (depth == 0) {
-            int oldDepth = intmaxlog(lastItemCount);
-            depth = intmaxlog(indexedItems.size());
-            static const int slack = 100;
-            if (bspTree.leafCount() == 0 || (oldDepth != depth && qAbs(lastItemCount - indexedItems.size()) > slack)) {
-                // ### Crude algorithm.
-                regenerateIndex = true;
-            }
-        }
-
-        // Regenerate the tree.
-        if (regenerateIndex) {
-            regenerateIndex = false;
-            bspTree.initialize(q->sceneRect(), depth);
-            unindexedItems = indexedItems;
-            lastItemCount = indexedItems.size();
-            q->update();
-
-            // Take this opportunity to reset our largest-item counter for
-            // untransformable items. When the items are inserted into the BSP
-            // tree, we'll get an accurate calculation.
-            largestUntransformableItem = QRectF();
-        }
-    }
+    calledEmitUpdated = false;
 
-    // Insert all unindexed items into the tree.
-    for (int i = 0; i < unindexedItems.size(); ++i) {
-        if (QGraphicsItem *item = unindexedItems.at(i)) {
-            QRectF rect = item->sceneBoundingRect();
-            if (item->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren)
-                continue;
-            if (indexMethod == QGraphicsScene::BspTreeIndex)
-                bspTree.insertItem(item, rect);
-
-            // If the item ignores view transformations, update our
-            // largest-item-counter to ensure that the view can accurately
-            // discover untransformable items when drawing.
-            if (item->d_ptr->itemIsUntransformable()) {
-                QGraphicsItem *topmostUntransformable = item;
-                while (topmostUntransformable && (topmostUntransformable->d_ptr->ancestorFlags
-                                                  & QGraphicsItemPrivate::AncestorIgnoresTransformations)) {
-                    topmostUntransformable = topmostUntransformable->parentItem();
-                }
-                // ### Verify that this is the correct largest untransformable rectangle.
-                largestUntransformableItem |= item->mapToItem(topmostUntransformable, item->boundingRect()).boundingRect();
-            }
+    if (dirtyGrowingItemsBoundingRect) {
+        if (!hasSceneRect) {
+            const QRectF oldGrowingItemsBoundingRect = growingItemsBoundingRect;
+            growingItemsBoundingRect |= q->itemsBoundingRect();
+            if (oldGrowingItemsBoundingRect != growingItemsBoundingRect)
+                emit q->sceneRectChanged(growingItemsBoundingRect);
         }
+        dirtyGrowingItemsBoundingRect = false;
     }
-    unindexedItems.clear();
-
-    // Notify scene rect changes.
-    if (!hasSceneRect && growingItemsBoundingRect != oldGrowingItemsBoundingRect)
-        emit q->sceneRectChanged(growingItemsBoundingRect);
-}
-
-/*!
-    \internal
-*/
-void QGraphicsScenePrivate::_q_emitUpdated()
-{
-    Q_Q(QGraphicsScene);
-    calledEmitUpdated = false;
 
     // Ensure all views are connected if anything is connected. This disables
     // the optimization that items send updates directly to the views, but it
@@ -633,6 +374,7 @@ void QGraphicsScenePrivate::_q_emitUpdated()
 void QGraphicsScenePrivate::registerTopLevelItem(QGraphicsItem *item)
 {
     needSortTopLevelItems = true;
+    item->d_ptr->siblingIndex = topLevelItems.size();
     topLevelItems.append(item);
 }
 
@@ -642,19 +384,10 @@ void QGraphicsScenePrivate::registerTopLevelItem(QGraphicsItem *item)
 void QGraphicsScenePrivate::unregisterTopLevelItem(QGraphicsItem *item)
 {
     topLevelItems.removeOne(item);
-}
-
-/*!
-    \internal
-
-    Updates all items in the pending update list. At this point, the list is
-    unlikely to contain partially constructed items.
-*/
-void QGraphicsScenePrivate::_q_updateLater()
-{
-    foreach (QGraphicsItem *item, pendingUpdateItems)
-        item->update();
-    pendingUpdateItems.clear();
+    // NB! Do not use topLevelItems.removeAt(item->d_ptr->siblingIndex) because
+    // the item is not guaranteed to be at the index after the list is sorted
+    // (see ensureSortedTopLevelItems()).
+    item->d_ptr->siblingIndex = -1;
 }
 
 /*!
@@ -680,9 +413,23 @@ void QGraphicsScenePrivate::_q_processDirtyItems()
 {
     processDirtyItemsEmitted = false;
 
+    if (updateAll) {
+        Q_ASSERT(calledEmitUpdated);
+        // No need for further processing (except resetting the dirty states).
+        // The growingItemsBoundingRect is updated in _q_emitUpdated.
+        for (int i = 0; i < topLevelItems.size(); ++i)
+            resetDirtyItem(topLevelItems.at(i), /*recursive=*/true);
+        return;
+    }
+
     const bool wasPendingSceneUpdate = calledEmitUpdated;
     const QRectF oldGrowingItemsBoundingRect = growingItemsBoundingRect;
-    processDirtyItemsRecursive(0);
+
+    // Process items recursively.
+    for (int i = 0; i < topLevelItems.size(); ++i)
+        processDirtyItemsRecursive(topLevelItems.at(i));
+
+    dirtyGrowingItemsBoundingRect = false;
     if (!hasSceneRect && oldGrowingItemsBoundingRect != growingItemsBoundingRect)
         emit q_func()->sceneRectChanged(growingItemsBoundingRect);
 
@@ -727,22 +474,16 @@ void QGraphicsScenePrivate::removeItemHelper(QGraphicsItem *item)
 
     // Clear focus on the item to remove any reference in the focusWidget chain.
     item->clearFocus();
+
     markDirty(item, QRectF(), false, false, false, false, /*removingItemFromScene=*/true);
 
-    if (!item->d_ptr->inDestructor) {
+    if (item->d_ptr->inDestructor) {
+        // The item is actually in its destructor, we call the special method in the index.
+        index->deleteItem(item);
+    } else {
         // Can potentially call item->boundingRect() (virtual function), that's why
         // we only can call this function if the item is not in its destructor.
-        removeFromIndex(item);
-    } else if (item->d_ptr->index != -1) {
-        // Important: The index is useless until purgeRemovedItems() is called.
-        indexedItems[item->d_ptr->index] = (QGraphicsItem *)0;
-        if (!purgePending)
-            purgePending = true;
-        removedItems << item;
-    } else {
-        // Recently added items are purged immediately. unindexedItems() never
-        // contains stale items.
-        unindexedItems.removeAll(item);
+        index->removeItem(item);
     }
 
     if (!item->d_ptr->inDestructor && item == tabFocusFirst) {
@@ -763,17 +504,6 @@ void QGraphicsScenePrivate::removeItemHelper(QGraphicsItem *item)
         unregisterTopLevelItem(item);
     }
 
-    if (!item->d_ptr->inDestructor) {
-        // Remove from our item lists.
-        int index = item->d_func()->index;
-        if (index != -1) {
-            freeItemIndexes << index;
-            indexedItems[index] = 0;
-        } else {
-            unindexedItems.removeAll(item);
-        }
-    }
-
     // Reset the mouse grabber and focus item data.
     if (item == focusItem)
         focusItem = 0;
@@ -793,7 +523,6 @@ void QGraphicsScenePrivate::removeItemHelper(QGraphicsItem *item)
     hoverItems.removeAll(item);
     cachedItemsUnderMouse.removeAll(item);
     unpolishedItems.removeAll(item);
-    pendingUpdateItems.removeAll(item);
     resetDirtyItem(item);
 
     //We remove all references of item from the sceneEventFilter arrays
@@ -831,45 +560,6 @@ void QGraphicsScenePrivate::removeItemHelper(QGraphicsItem *item)
 
 /*!
     \internal
-
-    Removes stale pointers from all data structures.
-*/
-void QGraphicsScenePrivate::purgeRemovedItems()
-{
-    if (!purgePending && removedItems.isEmpty())
-        return;
-
-    // Remove stale items from the BSP tree.
-    if (indexMethod != QGraphicsScene::NoIndex)
-        bspTree.removeItems(removedItems);
-
-    // Purge this list.
-    removedItems.clear();
-    freeItemIndexes.clear();
-    for (int i = 0; i < indexedItems.size(); ++i) {
-        if (!indexedItems.at(i))
-            freeItemIndexes << i;
-    }
-    purgePending = false;
-}
-
-/*!
-    \internal
-
-    Starts or restarts the timer used for reindexing unindexed items.
-*/
-void QGraphicsScenePrivate::startIndexTimer(int interval)
-{
-    Q_Q(QGraphicsScene);
-    if (indexTimerId) {
-        restartIndexTimer = true;
-    } else {
-        indexTimerId = q->startTimer(interval);
-    }
-}
-
-/*!
-    \internal
 */
 void QGraphicsScenePrivate::addPopup(QGraphicsWidget *widget)
 {
@@ -1104,41 +794,20 @@ QList<QGraphicsItem *> QGraphicsScenePrivate::itemsAtPosition(const QPoint &scre
 {
     Q_Q(const QGraphicsScene);
     QGraphicsView *view = widget ? qobject_cast<QGraphicsView *>(widget->parentWidget()) : 0;
-    QList<QGraphicsItem *> items;
-    if (view)
-        items = view->items(view->viewport()->mapFromGlobal(screenPos));
-    else
-        items = q->items(scenePos);
-    return items;
-}
+    if (!view)
+        return q->items(scenePos, Qt::IntersectsItemShape, Qt::AscendingOrder, QTransform());
 
-/*!
-    \internal
+    const QRectF pointRect(QPointF(widget->mapFromGlobal(screenPos)), QSizeF(1, 1));
+    if (!view->isTransformed())
+        return q->items(pointRect, Qt::IntersectsItemShape, Qt::AscendingOrder);
 
-    Checks if item collides with the path and mode, but also checks that if it
-    doesn't collide, maybe its frame rect will.
-*/
-bool QGraphicsScenePrivate::itemCollidesWithPath(QGraphicsItem *item,
-                                                 const QPainterPath &path,
-                                                 Qt::ItemSelectionMode mode)
-{
-    if (item->collidesWithPath(path, mode))
-        return true;
-    if (item->isWidget()) {
-        // Check if this is a window, and if its frame rect collides.
-        QGraphicsWidget *widget = static_cast<QGraphicsWidget *>(item);
-        if (widget->isWindow()) {
-            QRectF frameRect = widget->windowFrameRect();
-            QPainterPath framePath;
-            framePath.addRect(frameRect);
-            bool intersects = path.intersects(frameRect);
-            if (mode == Qt::IntersectsItemShape || mode == Qt::IntersectsItemBoundingRect)
-                return intersects || path.contains(frameRect.topLeft())
-                    || framePath.contains(path.elementAt(0));
-            return !intersects && path.contains(frameRect.topLeft());
-        }
+    const QTransform viewTransform = view->viewportTransform();
+    if (viewTransform.type() <= QTransform::TxScale) {
+        return q->items(viewTransform.inverted().mapRect(pointRect), Qt::IntersectsItemShape,
+                        Qt::AscendingOrder, viewTransform);
     }
-    return false;
+    return q->items(viewTransform.inverted().map(pointRect), Qt::IntersectsItemShape,
+                    Qt::AscendingOrder, viewTransform);
 }
 
 /*!
@@ -1150,7 +819,7 @@ void QGraphicsScenePrivate::storeMouseButtonsForMouseGrabber(QGraphicsSceneMouse
         if (event->buttons() & i) {
             mouseGrabberButtonDownPos.insert(Qt::MouseButton(i),
                                              mouseGrabberItems.last()->d_ptr->genericMapFromScene(event->scenePos(),
-                                                                                          event->widget()));
+                                                                                                  event->widget()));
             mouseGrabberButtonDownScenePos.insert(Qt::MouseButton(i), event->scenePos());
             mouseGrabberButtonDownScreenPos.insert(Qt::MouseButton(i), event->screenPos());
         }
@@ -1428,779 +1097,6 @@ QGraphicsWidget *QGraphicsScenePrivate::windowForItem(const QGraphicsItem *item)
     return 0;
 }
 
-QList<QGraphicsItem *> QGraphicsScenePrivate::topLevelItemsInStackingOrder(const QTransform *const viewTransform,
-                                                                           QRegion *exposedRegion)
-{
-    if (indexMethod == QGraphicsScene::NoIndex || !exposedRegion) {
-        if (needSortTopLevelItems) {
-            needSortTopLevelItems = false;
-            qStableSort(topLevelItems.begin(), topLevelItems.end(), qt_notclosestLeaf);
-        }
-        return topLevelItems;
-    }
-
-    const QRectF exposedRect = exposedRegion->boundingRect().adjusted(-1, -1, 1, 1);
-    QRectF sceneRect;
-    QTransform invertedViewTransform(Qt::Uninitialized);
-    if (!viewTransform) {
-        sceneRect = exposedRect;
-    } else {
-        invertedViewTransform = viewTransform->inverted();
-        sceneRect = invertedViewTransform.mapRect(exposedRect);
-    }
-    if (!largestUntransformableItem.isEmpty()) {
-        // ### Nuke this when we move the indexing code into a separate
-        // class.  All the largestUntransformableItem code should then go
-        // away, and the estimate function should return untransformable
-        // items as well.
-        QRectF untr = largestUntransformableItem;
-        QRectF ltri = !viewTransform ? untr : invertedViewTransform.mapRect(untr);
-        ltri.adjust(-untr.width(), -untr.height(), untr.width(), untr.height());
-        sceneRect.adjust(-ltri.width(), -ltri.height(), ltri.width(), ltri.height());
-    }
-
-    QList<QGraphicsItem *> tmp = estimateItemsInRect(sceneRect);
-    for (int i = 0; i < tmp.size(); ++i)
-        tmp.at(i)->topLevelItem()->d_ptr->itemDiscovered = 1;
-
-    // Sort if the toplevel list is unsorted.
-    if (needSortTopLevelItems) {
-        needSortTopLevelItems = false;
-        qStableSort(topLevelItems.begin(), topLevelItems.end(), qt_notclosestLeaf);
-    }
-
-    QList<QGraphicsItem *> tli;
-    for (int i = 0; i < topLevelItems.size(); ++i) {
-        // ### Investigate smarter ways. Looping through all top level
-        // items is not optimal. If the BSP tree is to have maximum
-        // effect, it should be possible to sort the subset of items
-        // quickly. We must use this approach for now, as it's the only
-        // current way to keep the stable sorting order (insertion order).
-        QGraphicsItem *item = topLevelItems.at(i);
-        if (item->d_ptr->itemDiscovered) {
-            item->d_ptr->itemDiscovered = 0;
-            tli << item;
-        }
-    }
-    return tli;
-}
-
-void QGraphicsScenePrivate::recursive_items_helper(QGraphicsItem *item, QRectF rect,
-                                                   QList<QGraphicsItem *> *items,
-                                                   const QTransform &parentTransform,
-                                                   const QTransform &viewTransform,
-                                                   Qt::ItemSelectionMode mode, Qt::SortOrder order,
-                                                   qreal parentOpacity) const
-{
-    // Calculate opacity.
-    qreal opacity;
-    if (item) {
-        if (!item->d_ptr->visible)
-            return;
-        QGraphicsItem *p = item->d_ptr->parent;
-        bool itemIgnoresParentOpacity = item->d_ptr->flags & QGraphicsItem::ItemIgnoresParentOpacity;
-        bool parentDoesntPropagateOpacity = (p && (p->d_ptr->flags & QGraphicsItem::ItemDoesntPropagateOpacityToChildren));
-        if (!itemIgnoresParentOpacity && !parentDoesntPropagateOpacity) {
-            opacity = parentOpacity * item->opacity();
-        } else {
-            opacity = item->d_ptr->opacity;
-        }
-        if (opacity == 0.0 && !(item->d_ptr->flags & QGraphicsItem::ItemDoesntPropagateOpacityToChildren))
-            return;
-    } else {
-        opacity = parentOpacity;
-    }
-
-    // Calculate the full transform for this item.
-    QTransform transform = parentTransform;
-    bool keep = false;
-    if (item) {
-        item->d_ptr->combineTransformFromParent(&transform, &viewTransform);
-
-        // ### This does not take the clip into account.
-        QRectF brect = item->boundingRect();
-        _q_adjustRect(&brect);
-
-        keep = true;
-        if (mode == Qt::ContainsItemShape || mode == Qt::ContainsItemBoundingRect)
-            keep = rect.contains(transform.mapRect(brect)) && rect != brect;
-        else
-            keep = rect.intersects(transform.mapRect(brect));
-
-        if (keep && (mode == Qt::ContainsItemShape || mode == Qt::IntersectsItemShape)) {
-            QPainterPath rectPath;
-            rectPath.addRect(rect);
-            keep = itemCollidesWithPath(item, transform.inverted().map(rectPath), mode);
-        }
-    }
-
-    bool childClip = (item && (item->d_ptr->flags & QGraphicsItem::ItemClipsChildrenToShape));
-    bool dontProcessItem = !item || !keep;
-    bool dontProcessChildren = item && dontProcessItem && childClip;
-
-    // Find and sort children.
-    QList<QGraphicsItem *> &children = item ? item->d_ptr->children : const_cast<QGraphicsScenePrivate *>(this)->topLevelItems;
-    if (!dontProcessChildren) {
-        if (item && item->d_ptr->needSortChildren) {
-            item->d_ptr->needSortChildren = 0;
-            qStableSort(children.begin(), children.end(), qt_notclosestLeaf);
-        } else if (!item && needSortTopLevelItems) {
-            const_cast<QGraphicsScenePrivate *>(this)->needSortTopLevelItems = false;
-            qStableSort(children.begin(), children.end(), qt_notclosestLeaf);
-        }
-    }
-
-    childClip &= !dontProcessChildren & !children.isEmpty();
-
-    // Clip.
-    if (childClip)
-        rect &= transform.map(item->shape()).controlPointRect();
-
-    // Process children behind
-    int i = 0;
-    if (!dontProcessChildren) {
-        for (i = 0; i < children.size(); ++i) {
-            QGraphicsItem *child = children.at(i);
-            if (!(child->d_ptr->flags & QGraphicsItem::ItemStacksBehindParent))
-                break;
-            recursive_items_helper(child, rect, items, transform, viewTransform,
-                                   mode, order, opacity);
-        }
-    }
-
-    // Process item
-    if (!dontProcessItem)
-        items->append(item);
-
-    // Process children in front
-    if (!dontProcessChildren) {
-        for (; i < children.size(); ++i)
-            recursive_items_helper(children.at(i), rect, items, transform, viewTransform,
-                                   mode, order, opacity);
-    }
-
-    if (!item && order == Qt::AscendingOrder) {
-        int n = items->size();
-        for (int i = 0; i < n / 2; ++i) {
-            QGraphicsItem *tmp = (*items)[n - i - 1];
-            (*items)[n - i - 1] = (*items)[i];
-            (*items)[i] = tmp;
-        }
-    }
-}
-
-QList<QGraphicsItem *> QGraphicsScenePrivate::items_helper(const QPointF &pos) const
-{
-    QList<QGraphicsItem *> items;
-
-    // The index returns a rough estimate of what items are inside the rect.
-    // Refine it by iterating through all returned items.
-    QRectF adjustedRect = QRectF(pos, QSize(1,1));
-    foreach (QGraphicsItem *item, estimateItemsInRect(adjustedRect)) {
-        // Find the item's scene transform in a clever way.
-        QTransform x = item->sceneTransform();
-        bool keep = false;
-
-        // ### _q_adjustedRect is only needed because QRectF::intersects,
-        // QRectF::contains and QTransform::map() and friends don't work with
-        // flat rectangles.
-        const QRectF br(adjustedItemBoundingRect(item));
-            // Rect intersects/contains item's shape
-        if (QRectF_intersects(adjustedRect, x.mapRect(br))) {
-            bool ok;
-            QTransform xinv = x.inverted(&ok);
-            if (ok) {
-                if (item->contains(xinv.map(pos))) {
-                    items << item;
-                    keep = true;
-                }
-            }
-        }
-
-        if (keep && (item->flags() & QGraphicsItem::ItemClipsChildrenToShape)) {
-            // Recurse into children that clip children.
-            bool ok;
-            QTransform xinv = x.inverted(&ok);
-            if (ok)
-                childItems_helper(&items, item, xinv.map(pos));
-        }
-    }
-
-    sortItems(&items, Qt::AscendingOrder, sortCacheEnabled);
-    return items;
-}
-
-QList<QGraphicsItem *> QGraphicsScenePrivate::items_helper(const QRectF &rect,
-                                                           Qt::ItemSelectionMode mode,
-                                                           Qt::SortOrder order) const
-{
-    QList<QGraphicsItem *> items;
-
-    QPainterPath path;
-
-    // The index returns a rough estimate of what items are inside the rect.
-    // Refine it by iterating through all returned items.
-    QRectF adjustedRect(rect);
-    _q_adjustRect(&adjustedRect);
-    foreach (QGraphicsItem *item, estimateItemsInRect(adjustedRect)) {
-        // Find the item's scene transform in a clever way.
-        QTransform x = item->sceneTransform();
-        bool keep = false;
-
-        // ### _q_adjustedRect is only needed because QRectF::intersects,
-        // QRectF::contains and QTransform::map() and friends don't work with
-        // flat rectangles.
-        const QRectF br(adjustedItemBoundingRect(item));
-        if (mode >= Qt::ContainsItemBoundingRect) {
-            // Rect intersects/contains item's bounding rect
-            QRectF mbr = x.mapRect(br);
-            if ((mode == Qt::IntersectsItemBoundingRect && QRectF_intersects(rect, mbr))
-                || (mode == Qt::ContainsItemBoundingRect && rect != mbr && rect.contains(mbr))) {
-                items << item;
-                keep = true;
-            }
-        } else {
-            // Rect intersects/contains item's shape
-            if (QRectF_intersects(adjustedRect, x.mapRect(br))) {
-                bool ok;
-                QTransform xinv = x.inverted(&ok);
-                if (ok) {
-                    if (path.isEmpty())
-                        path.addRect(rect);
-                    if (itemCollidesWithPath(item, xinv.map(path), mode)) {
-                        items << item;
-                        keep = true;
-                    }
-                }
-            }
-        }
-
-        if (keep && (item->flags() & QGraphicsItem::ItemClipsChildrenToShape)) {
-            // Recurse into children that clip children.
-            bool ok;
-            QTransform xinv = x.inverted(&ok);
-            if (ok) {
-                if (x.type() <= QTransform::TxScale) {
-                    // Rect
-                    childItems_helper(&items, item, xinv.mapRect(rect), mode);
-                } else {
-                    // Polygon
-                    childItems_helper(&items, item, xinv.map(rect), mode);
-                }
-            }
-        }
-    }
-
-    if (order != Qt::SortOrder(-1))
-        sortItems(&items, order, sortCacheEnabled);
-    return items;
-}
-
-QList<QGraphicsItem *> QGraphicsScenePrivate::items_helper(const QPolygonF &polygon,
-                                                           Qt::ItemSelectionMode mode,
-                                                           Qt::SortOrder order) const
-{
-    QList<QGraphicsItem *> items;
-
-    QRectF polyRect(polygon.boundingRect());
-     _q_adjustRect(&polyRect);
-    QPainterPath path;
-
-    // The index returns a rough estimate of what items are inside the rect.
-    // Refine it by iterating through all returned items.
-    foreach (QGraphicsItem *item, estimateItemsInRect(polyRect)) {
-        // Find the item's scene transform in a clever way.
-        QTransform x = item->sceneTransform();
-        bool keep = false;
-
-        // ### _q_adjustedRect is only needed because QRectF::intersects,
-        // QRectF::contains and QTransform::map() and friends don't work with
-        // flat rectangles.
-        const QRectF br(adjustedItemBoundingRect(item));
-        if (mode >= Qt::ContainsItemBoundingRect) {
-            // Polygon contains/intersects item's bounding rect
-            if (path == QPainterPath())
-                path.addPolygon(polygon);
-            if ((mode == Qt::IntersectsItemBoundingRect && path.intersects(x.mapRect(br)))
-                || (mode == Qt::ContainsItemBoundingRect && path.contains(x.mapRect(br)))) {
-                items << item;
-                keep = true;
-            }
-        } else {
-            // Polygon contains/intersects item's shape
-            if (QRectF_intersects(polyRect, x.mapRect(br))) {
-                bool ok;
-                QTransform xinv = x.inverted(&ok);
-                if (ok) {
-                    if (path == QPainterPath())
-                        path.addPolygon(polygon);
-                    if (itemCollidesWithPath(item, xinv.map(path), mode)) {
-                        items << item;
-                        keep = true;
-                    }
-                }
-            }
-        }
-
-        if (keep && (item->flags() & QGraphicsItem::ItemClipsChildrenToShape)) {
-            // Recurse into children that clip children.
-            bool ok;
-            QTransform xinv = x.inverted(&ok);
-            if (ok)
-                childItems_helper(&items, item, xinv.map(polygon), mode);
-        }
-    }
-
-    if (order != Qt::SortOrder(-1))
-        sortItems(&items, order, sortCacheEnabled);
-    return items;
-}
-
-QList<QGraphicsItem *> QGraphicsScenePrivate::items_helper(const QPainterPath &path,
-                                                           Qt::ItemSelectionMode mode,
-                                                           Qt::SortOrder order) const
-{
-    QList<QGraphicsItem *> items;
-    QRectF pathRect(path.controlPointRect());
-    _q_adjustRect(&pathRect);
-
-    // The index returns a rough estimate of what items are inside the rect.
-    // Refine it by iterating through all returned items.
-    foreach (QGraphicsItem *item, estimateItemsInRect(pathRect)) {
-        // Find the item's scene transform in a clever way.
-        QTransform x = item->sceneTransform();
-        bool keep = false;
-
-        // ### _q_adjustedRect is only needed because QRectF::intersects,
-        // QRectF::contains and QTransform::map() and friends don't work with
-        // flat rectangles.
-        const QRectF br(adjustedItemBoundingRect(item));
-        if (mode >= Qt::ContainsItemBoundingRect) {
-            // Path contains/intersects item's bounding rect
-            if ((mode == Qt::IntersectsItemBoundingRect && path.intersects(x.mapRect(br)))
-                || (mode == Qt::ContainsItemBoundingRect && path.contains(x.mapRect(br)))) {
-                items << item;
-                keep = true;
-            }
-        } else {
-            // Path contains/intersects item's shape
-            if (QRectF_intersects(pathRect, x.mapRect(br))) {
-                bool ok;
-                QTransform xinv = x.inverted(&ok);
-                if (ok) {
-                    if (itemCollidesWithPath(item, xinv.map(path), mode)) {
-                        items << item;
-                        keep = true;
-                    }
-                }
-            }
-        }
-
-        if (keep && (item->flags() & QGraphicsItem::ItemClipsChildrenToShape)) {
-            bool ok;
-            QTransform xinv = x.inverted(&ok);
-            if (ok)
-                childItems_helper(&items, item, xinv.map(path), mode);
-        }
-    }
-
-    if (order != Qt::SortOrder(-1))
-        sortItems(&items, order, sortCacheEnabled);
-    return items;
-}
-
-void QGraphicsScenePrivate::childItems_helper(QList<QGraphicsItem *> *items,
-                                              const QGraphicsItem *parent,
-                                              const QPointF &pos) const
-{
-    bool parentClip = (parent->flags() & QGraphicsItem::ItemClipsChildrenToShape);
-    if (parentClip && parent->d_ptr->isClippedAway())
-        return;
-    // ### is this needed?
-    if (parentClip && !parent->boundingRect().contains(pos))
-        return;
-
-    QList<QGraphicsItem *> &children = parent->d_ptr->children;
-    for (int i = 0; i < children.size(); ++i) {
-        QGraphicsItem *item = children.at(i);
-        if (item->d_ptr->transformData && !item->d_ptr->transformData->computedFullTransform().isInvertible())
-            continue;
-
-        // Skip invisible items and all their children.
-        if (item->d_ptr->isInvisible())
-            continue;
-
-        bool keep = false;
-        if (!item->d_ptr->isClippedAway()) {
-            if (item->contains(item->mapFromParent(pos))) {
-                items->append(item);
-                keep = true;
-            }
-        }
-
-        if ((keep || !(item->flags() & QGraphicsItem::ItemClipsChildrenToShape)) && !item->d_ptr->children.isEmpty())
-            // Recurse into children.
-            childItems_helper(items, item, item->mapFromParent(pos));
-    }
-}
-
-
-void QGraphicsScenePrivate::childItems_helper(QList<QGraphicsItem *> *items,
-                                              const QGraphicsItem *parent,
-                                              const QRectF &rect,
-                                              Qt::ItemSelectionMode mode) const
-{
-    bool parentClip = (parent->flags() & QGraphicsItem::ItemClipsChildrenToShape);
-    if (parentClip && parent->d_ptr->isClippedAway())
-        return;
-    QRectF adjustedRect(rect);
-    _q_adjustRect(&adjustedRect);
-    QRectF r = !parentClip ? adjustedRect : adjustedRect.intersected(adjustedItemBoundingRect(parent));
-    if (r.isEmpty())
-        return;
-
-    QPainterPath path;
-    QList<QGraphicsItem *> &children = parent->d_ptr->children;
-    for (int i = 0; i < children.size(); ++i) {
-        QGraphicsItem *item = children.at(i);
-        if (item->d_ptr->transformData && !item->d_ptr->transformData->computedFullTransform().isInvertible())
-            continue;
-
-        // Skip invisible items and all their children.
-        if (item->d_ptr->isInvisible())
-            continue;
-
-        bool keep = false;
-        if (!item->d_ptr->isClippedAway()) {
-            // ### _q_adjustedRect is only needed because QRectF::intersects,
-            // QRectF::contains and QTransform::map() and friends don't work with
-            // flat rectangles.
-            const QRectF br(adjustedItemBoundingRect(item));
-            QRectF mbr = item->mapRectToParent(br);
-            if (mode >= Qt::ContainsItemBoundingRect) {
-                // Rect intersects/contains item's bounding rect
-                if ((mode == Qt::IntersectsItemBoundingRect && QRectF_intersects(rect, mbr))
-                    || (mode == Qt::ContainsItemBoundingRect && rect != mbr && rect.contains(br))) {
-                    items->append(item);
-                    keep = true;
-                }
-            } else {
-                // Rect intersects/contains item's shape
-                if (QRectF_intersects(rect, mbr)) {
-                    if (path == QPainterPath())
-                        path.addRect(rect);
-                    if (itemCollidesWithPath(item, item->mapFromParent(path), mode)) {
-                        items->append(item);
-                        keep = true;
-                    }
-                }
-            }
-        }
-
-        if ((keep || !(item->flags() & QGraphicsItem::ItemClipsChildrenToShape)) && !item->d_ptr->children.isEmpty()) {
-            // Recurse into children.
-            if (!item->d_ptr->transformData || item->d_ptr->transformData->computedFullTransform().type() <= QTransform::TxScale) {
-                // Rect
-                childItems_helper(items, item, item->mapRectFromParent(rect), mode);
-            } else {
-                // Polygon
-                childItems_helper(items, item, item->mapFromParent(rect), mode);
-            }
-        }
-    }
-}
-
-
-void QGraphicsScenePrivate::childItems_helper(QList<QGraphicsItem *> *items,
-                                              const QGraphicsItem *parent,
-                                              const QPolygonF &polygon,
-                                              Qt::ItemSelectionMode mode) const
-{
-    bool parentClip = (parent->flags() & QGraphicsItem::ItemClipsChildrenToShape);
-    if (parentClip && parent->d_ptr->isClippedAway())
-        return;
-    QRectF polyRect(polygon.boundingRect());
-    _q_adjustRect(&polyRect);
-    QRectF r = !parentClip ? polyRect : polyRect.intersected(adjustedItemBoundingRect(parent));
-    if (r.isEmpty())
-        return;
-
-    QPainterPath path;
-    QList<QGraphicsItem *> &children = parent->d_ptr->children;
-    for (int i = 0; i < children.size(); ++i) {
-        QGraphicsItem *item = children.at(i);
-        if (item->d_ptr->transformData && !item->d_ptr->transformData->computedFullTransform().isInvertible())
-            continue;
-
-        // Skip invisible items.
-        if (item->d_ptr->isInvisible())
-            continue;
-
-        bool keep = false;
-        if (!item->d_ptr->isClippedAway()) {
-            // ### _q_adjustedRect is only needed because QRectF::intersects,
-            // QRectF::contains and QTransform::map() and friends don't work with
-            // flat rectangles.
-            const QRectF br(adjustedItemBoundingRect(item));
-            if (mode >= Qt::ContainsItemBoundingRect) {
-                // Polygon contains/intersects item's bounding rect
-                if (path == QPainterPath())
-                    path.addPolygon(polygon);
-                if ((mode == Qt::IntersectsItemBoundingRect && path.intersects(item->mapRectToParent(br)))
-                    || (mode == Qt::ContainsItemBoundingRect && path.contains(item->mapRectToParent(br)))) {
-                    items->append(item);
-                    keep = true;
-                }
-            } else {
-                // Polygon contains/intersects item's shape
-                if (QRectF_intersects(polyRect, item->mapRectToParent(br))) {
-                    if (path == QPainterPath())
-                        path.addPolygon(polygon);
-                    if (itemCollidesWithPath(item, item->mapFromParent(path), mode)) {
-                        items->append(item);
-                        keep = true;
-                    }
-                }
-            }
-        }
-
-        if ((keep || !(item->flags() & QGraphicsItem::ItemClipsChildrenToShape)) && !item->d_ptr->children.isEmpty()) {
-            // Recurse into children that clip children.
-            childItems_helper(items, item, item->mapFromParent(polygon), mode);
-        }
-    }
-}
-
-void QGraphicsScenePrivate::childItems_helper(QList<QGraphicsItem *> *items,
-                                              const QGraphicsItem *parent,
-                                              const QPainterPath &path,
-                                              Qt::ItemSelectionMode mode) const
-{
-    bool parentClip = (parent->flags() & QGraphicsItem::ItemClipsChildrenToShape);
-    if (parentClip && parent->d_ptr->isClippedAway())
-        return;
-    QRectF pathRect(path.boundingRect());
-    _q_adjustRect(&pathRect);
-    QRectF r = !parentClip ? pathRect : pathRect.intersected(adjustedItemBoundingRect(parent));
-    if (r.isEmpty())
-        return;
-
-    QList<QGraphicsItem *> &children = parent->d_ptr->children;
-    for (int i = 0; i < children.size(); ++i) {
-        QGraphicsItem *item = children.at(i);
-        if (item->d_ptr->transformData && !item->d_ptr->transformData->computedFullTransform().isInvertible())
-            continue;
-
-        // Skip invisible items.
-        if (item->d_ptr->isInvisible())
-            continue;
-
-        bool keep = false;
-        if (!item->d_ptr->isClippedAway()) {
-            // ### _q_adjustedRect is only needed because QRectF::intersects,
-            // QRectF::contains and QTransform::map() and friends don't work with
-            // flat rectangles.
-            const QRectF br(adjustedItemBoundingRect(item));
-            if (mode >= Qt::ContainsItemBoundingRect) {
-                // Polygon contains/intersects item's bounding rect
-                if ((mode == Qt::IntersectsItemBoundingRect && path.intersects(item->mapRectToParent(br)))
-                    || (mode == Qt::ContainsItemBoundingRect && path.contains(item->mapRectToParent(br)))) {
-                    items->append(item);
-                    keep = true;
-                }
-            } else {
-                // Path contains/intersects item's shape
-                if (QRectF_intersects(pathRect, item->mapRectToParent(br))) {
-                    if (itemCollidesWithPath(item, item->mapFromParent(path), mode)) {
-                        items->append(item);
-                        keep = true;
-                    }
-                }
-            }
-        }
-
-        if ((keep || !(item->flags() & QGraphicsItem::ItemClipsChildrenToShape)) && !item->d_ptr->children.isEmpty()) {
-            // Recurse into children that clip children.
-            childItems_helper(items, item, item->mapFromParent(path), mode);
-        }
-    }
-}
-
-void QGraphicsScenePrivate::invalidateSortCache()
-{
-    Q_Q(QGraphicsScene);
-    if (!sortCacheEnabled || updatingSortCache)
-        return;
-
-    updatingSortCache = true;
-    QMetaObject::invokeMethod(q, "_q_updateSortCache", Qt::QueuedConnection);
-}
-
-/*!
-    \internal
-
-    Should not be exported, but we can't change that now.
-    ### Qt 5: Remove symbol / make static
-*/
-inline bool qt_closestLeaf(const QGraphicsItem *item1, const QGraphicsItem *item2)
-{
-    // Return true if sibling item1 is on top of item2.
-    const QGraphicsItemPrivate *d1 = item1->d_ptr;
-    const QGraphicsItemPrivate *d2 = item2->d_ptr;
-    bool f1 = d1->flags & QGraphicsItem::ItemStacksBehindParent;
-    bool f2 = d2->flags & QGraphicsItem::ItemStacksBehindParent;
-    if (f1 != f2) return f2;
-    qreal z1 = d1->z;
-    qreal z2 = d2->z;
-    return z1 > z2;
-}
-
-static inline bool qt_notclosestLeaf(const QGraphicsItem *item1, const QGraphicsItem *item2)
-{
-    return qt_closestLeaf(item2, item1);
-}
-
-/*!
-    \internal
-
-    Should not be exported, but we can't change that now.
-*/
-inline bool qt_closestItemFirst(const QGraphicsItem *item1, const QGraphicsItem *item2)
-{
-    return QGraphicsScenePrivate::closestItemFirst_withoutCache(item1, item2);
-}
-
-/*!
-    Returns true if \a item1 is on top of \a item2.
-
-    \internal
-*/
-bool QGraphicsScenePrivate::closestItemFirst_withoutCache(const QGraphicsItem *item1, const QGraphicsItem *item2)
-{
-    // Siblings? Just check their z-values.
-    const QGraphicsItemPrivate *d1 = item1->d_ptr;
-    const QGraphicsItemPrivate *d2 = item2->d_ptr;
-    if (d1->parent == d2->parent)
-        return qt_closestLeaf(item1, item2);
-
-    // Find common ancestor, and each item's ancestor closest to the common
-    // ancestor.
-    int item1Depth = d1->depth;
-    int item2Depth = d2->depth;
-    const QGraphicsItem *p = item1;
-    const QGraphicsItem *t1 = item1;
-    while (item1Depth > item2Depth && (p = p->d_ptr->parent)) {
-        if (p == item2) {
-            // item2 is one of item1's ancestors; item1 is on top
-            return !(t1->d_ptr->flags & QGraphicsItem::ItemStacksBehindParent);
-        }
-        t1 = p;
-        --item1Depth;
-    }
-    p = item2;
-    const QGraphicsItem *t2 = item2;
-    while (item2Depth > item1Depth && (p = p->d_ptr->parent)) {
-        if (p == item1) {
-            // item1 is one of item2's ancestors; item1 is not on top
-            return (t2->d_ptr->flags & QGraphicsItem::ItemStacksBehindParent);
-        }
-        t2 = p;
-        --item2Depth;
-    }
-
-    // item1Ancestor is now at the same level as item2Ancestor, but not the same.
-    const QGraphicsItem *a1 = t1;
-    const QGraphicsItem *a2 = t2;
-    while (a1) {
-        const QGraphicsItem *p1 = a1;
-        const QGraphicsItem *p2 = a2;
-        a1 = a1->parentItem();
-        a2 = a2->parentItem();
-        if (a1 && a1 == a2)
-            return qt_closestLeaf(p1, p2);
-    }
-
-    // No common ancestor? Then just compare the items' toplevels directly.
-    return qt_closestLeaf(t1->topLevelItem(), t2->topLevelItem());
-}
-
-/*!
-    Returns true if \a item2 is on top of \a item1.
-
-    \internal
-*/
-bool QGraphicsScenePrivate::closestItemLast_withoutCache(const QGraphicsItem *item1, const QGraphicsItem *item2)
-{
-    return closestItemFirst_withoutCache(item2, item1);
-}
-
-void QGraphicsScenePrivate::climbTree(QGraphicsItem *item, int *stackingOrder)
-{
-    if (!item->d_ptr->children.isEmpty()) {
-        QList<QGraphicsItem *> childList = item->d_ptr->children;
-        qSort(childList.begin(), childList.end(), qt_closestLeaf);
-        for (int i = 0; i < childList.size(); ++i) {
-            QGraphicsItem *item = childList.at(i);
-            if (!(item->flags() & QGraphicsItem::ItemStacksBehindParent))
-                climbTree(childList.at(i), stackingOrder);
-        }
-        item->d_ptr->globalStackingOrder = (*stackingOrder)++;
-        for (int i = 0; i < childList.size(); ++i) {
-            QGraphicsItem *item = childList.at(i);
-            if (item->flags() & QGraphicsItem::ItemStacksBehindParent)
-                climbTree(childList.at(i), stackingOrder);
-        }
-    } else {
-        item->d_ptr->globalStackingOrder = (*stackingOrder)++;
-    }
-}
-
-void QGraphicsScenePrivate::_q_updateSortCache()
-{
-    _q_updateIndex();
-
-    if (!sortCacheEnabled || !updatingSortCache)
-        return;
-
-    updatingSortCache = false;
-    int stackingOrder = 0;
-
-    QList<QGraphicsItem *> topLevels;
-
-    for (int i = 0; i < indexedItems.size(); ++i) {
-        QGraphicsItem *item = indexedItems.at(i);
-        if (item && item->parentItem() == 0)
-            topLevels << item;
-    }
-    for (int i = 0; i < unindexedItems.size(); ++i) {
-        QGraphicsItem *item = unindexedItems.at(i);
-        if (item->parentItem() == 0)
-            topLevels << item;
-    }
-
-    qSort(topLevels.begin(), topLevels.end(), qt_closestLeaf);
-    for (int i = 0; i < topLevels.size(); ++i)
-        climbTree(topLevels.at(i), &stackingOrder);
-}
-
-void QGraphicsScenePrivate::sortItems(QList<QGraphicsItem *> *itemList, Qt::SortOrder order,
-                                      bool sortCacheEnabled)
-{
-    if (sortCacheEnabled) {
-        if (order == Qt::AscendingOrder) {
-            qSort(itemList->begin(), itemList->end(), closestItemFirst_withCache);
-        } else if (order == Qt::DescendingOrder) {
-            qSort(itemList->begin(), itemList->end(), closestItemLast_withCache);
-        }
-    } else {
-        if (order == Qt::AscendingOrder) {
-            qSort(itemList->begin(), itemList->end(), closestItemFirst_withoutCache);
-        } else if (order == Qt::DescendingOrder) {
-            qSort(itemList->begin(), itemList->end(), closestItemLast_withoutCache);
-        }
-    }
-}
-
 /*!
     \internal
 
@@ -2333,8 +1229,8 @@ QGraphicsScene::QGraphicsScene(QObject *parent)
 QGraphicsScene::QGraphicsScene(const QRectF &sceneRect, QObject *parent)
     : QObject(*new QGraphicsScenePrivate, parent)
 {
-    setSceneRect(sceneRect);
     d_func()->init();
+    setSceneRect(sceneRect);
 }
 
 /*!
@@ -2348,8 +1244,8 @@ QGraphicsScene::QGraphicsScene(const QRectF &sceneRect, QObject *parent)
 QGraphicsScene::QGraphicsScene(qreal x, qreal y, qreal width, qreal height, QObject *parent)
     : QObject(*new QGraphicsScenePrivate, parent)
 {
-    setSceneRect(x, y, width, height);
     d_func()->init();
+    setSceneRect(x, y, width, height);
 }
 
 /*!
@@ -2386,8 +1282,19 @@ QGraphicsScene::~QGraphicsScene()
 QRectF QGraphicsScene::sceneRect() const
 {
     Q_D(const QGraphicsScene);
-    const_cast<QGraphicsScenePrivate *>(d)->_q_updateIndex();
-    return d->hasSceneRect ? d->sceneRect : d->growingItemsBoundingRect;
+    if (d->hasSceneRect)
+        return d->sceneRect;
+
+    if (d->dirtyGrowingItemsBoundingRect) {
+        // Lazily update the growing items bounding rect
+        QGraphicsScenePrivate *thatd = const_cast<QGraphicsScenePrivate *>(d);
+        QRectF oldGrowingBoundingRect = thatd->growingItemsBoundingRect;
+        thatd->growingItemsBoundingRect |= itemsBoundingRect();
+        thatd->dirtyGrowingItemsBoundingRect = false;
+        if (oldGrowingBoundingRect != thatd->growingItemsBoundingRect)
+            emit const_cast<QGraphicsScene *>(this)->sceneRectChanged(thatd->growingItemsBoundingRect);
+    }
+    return d->growingItemsBoundingRect;
 }
 void QGraphicsScene::setSceneRect(const QRectF &rect)
 {
@@ -2395,8 +1302,7 @@ void QGraphicsScene::setSceneRect(const QRectF &rect)
     if (rect != d->sceneRect) {
         d->hasSceneRect = !rect.isNull();
         d->sceneRect = rect;
-        d->resetIndex();
-        emit sceneRectChanged(rect);
+        emit sceneRectChanged(d->hasSceneRect ? rect : d->growingItemsBoundingRect);
     }
 }
 
@@ -2437,6 +1343,8 @@ void QGraphicsScene::setSceneRect(const QRectF &rect)
 void QGraphicsScene::render(QPainter *painter, const QRectF &target, const QRectF &source,
                             Qt::AspectRatioMode aspectRatioMode)
 {
+    // ### Switch to using the recursive rendering algorithm instead.
+
     // Default source rect = scene rect
     QRectF sourceRect = source;
     if (sourceRect.isNull())
@@ -2531,8 +1439,19 @@ QGraphicsScene::ItemIndexMethod QGraphicsScene::itemIndexMethod() const
 void QGraphicsScene::setItemIndexMethod(ItemIndexMethod method)
 {
     Q_D(QGraphicsScene);
-    d->resetIndex();
+    if (d->indexMethod == method)
+        return;
+
     d->indexMethod = method;
+
+    QList<QGraphicsItem *> oldItems = d->index->items(Qt::AscendingOrder);
+    delete d->index;
+    if (method == BspTreeIndex)
+        d->index = new QGraphicsSceneBspTreeIndex(this);
+    else
+        d->index = new QGraphicsSceneLinearIndex(this);
+    for (int i = oldItems.size() - 1; i >= 0; --i)
+        d->index->addItem(oldItems.at(i));
 }
 
 /*!
@@ -2570,35 +1489,32 @@ void QGraphicsScene::setItemIndexMethod(ItemIndexMethod method)
 int QGraphicsScene::bspTreeDepth() const
 {
     Q_D(const QGraphicsScene);
-    return d->bspTreeDepth;
+    QGraphicsSceneBspTreeIndex *bspTree = qobject_cast<QGraphicsSceneBspTreeIndex *>(d->index);
+    return bspTree ? bspTree->bspTreeDepth() : 0;
 }
 void QGraphicsScene::setBspTreeDepth(int depth)
 {
     Q_D(QGraphicsScene);
-    if (d->bspTreeDepth == depth)
-        return;
-
     if (depth < 0) {
         qWarning("QGraphicsScene::setBspTreeDepth: invalid depth %d ignored; must be >= 0", depth);
         return;
     }
 
-    d->bspTreeDepth = depth;
-    d->resetIndex();
+    QGraphicsSceneBspTreeIndex *bspTree = qobject_cast<QGraphicsSceneBspTreeIndex *>(d->index);
+    if (!bspTree) {
+        qWarning("QGraphicsScene::setBspTreeDepth: can not apply if indexing method is not BSP");
+        return;
+    }
+    bspTree->setBspTreeDepth(depth);
 }
 
 /*!
     \property QGraphicsScene::sortCacheEnabled
     \brief whether sort caching is enabled
     \since 4.5
+    \obsolete
 
-    When enabled, this property adds a cache that speeds up sorting and
-    transformations for scenes with deep hierarchies (i.e., items with many
-    levels of descendents), at the cost of using more memory (approx. 100 more
-    bytes of memory per item).
-
-    Items that are not part of a deep hierarchy suffer no penalty from this
-    cache.
+    Since Qt 4.6, this property has no effect.
 */
 bool QGraphicsScene::isSortCacheEnabled() const
 {
@@ -2608,10 +1524,9 @@ bool QGraphicsScene::isSortCacheEnabled() const
 void QGraphicsScene::setSortCacheEnabled(bool enabled)
 {
     Q_D(QGraphicsScene);
-    if (enabled == d->sortCacheEnabled)
+    if (d->sortCacheEnabled == enabled)
         return;
-    if ((d->sortCacheEnabled = enabled))
-        d->invalidateSortCache();
+    d->sortCacheEnabled = enabled;
 }
 
 /*!
@@ -2623,6 +1538,7 @@ void QGraphicsScene::setSortCacheEnabled(bool enabled)
 */
 QRectF QGraphicsScene::itemsBoundingRect() const
 {
+    // Does not take untransformable items into account.
     QRectF boundingRect;
     foreach (QGraphicsItem *item, items())
         boundingRect |= item->sceneBoundingRect();
@@ -2637,29 +1553,24 @@ QRectF QGraphicsScene::itemsBoundingRect() const
 QList<QGraphicsItem *> QGraphicsScene::items() const
 {
     Q_D(const QGraphicsScene);
-    const_cast<QGraphicsScenePrivate *>(d)->purgeRemovedItems();
+    return d->index->items(Qt::AscendingOrder);
+}
 
-    // If freeItemIndexes is empty, we know there are no holes in indexedItems and
-    // unindexedItems.
-    if (d->freeItemIndexes.isEmpty()) {
-        if (d->unindexedItems.isEmpty())
-            return d->indexedItems;
-        return d->indexedItems + d->unindexedItems;
-    }
+/*!
+    Returns an ordered list of all items on the scene. \a order decides the
+    sorting.
 
-    // Rebuild the list of items to avoid holes. ### We could also just
-    // compress the item lists at this point.
-    QList<QGraphicsItem *> itemList;
-    foreach (QGraphicsItem *item, d->indexedItems + d->unindexedItems) {
-        if (item)
-            itemList << item;
-    }
-    return itemList;
+    \sa addItem(), removeItem()
+*/
+QList<QGraphicsItem *> QGraphicsScene::items(Qt::SortOrder order) const
+{
+    Q_D(const QGraphicsScene);
+    return d->index->items(order);
 }
 
 /*!
     Returns all visible items at position \a pos in the scene. The items are
-    listed in descending Z order (i.e., the first item in the list is the
+    listed in descending stacking order (i.e., the first item in the list is the
     top-most item, and the last item is the bottom-most item).
 
     \sa itemAt()
@@ -2667,7 +1578,7 @@ QList<QGraphicsItem *> QGraphicsScene::items() const
 QList<QGraphicsItem *> QGraphicsScene::items(const QPointF &pos) const
 {
     Q_D(const QGraphicsScene);
-    return d->items_helper(pos);
+    return d->index->items(pos, Qt::IntersectsItemShape, Qt::AscendingOrder);
 }
 
 /*!
@@ -2686,9 +1597,7 @@ QList<QGraphicsItem *> QGraphicsScene::items(const QPointF &pos) const
 QList<QGraphicsItem *> QGraphicsScene::items(const QRectF &rect, Qt::ItemSelectionMode mode) const
 {
     Q_D(const QGraphicsScene);
-    QList<QGraphicsItem *> itemList;
-    d->recursive_items_helper(0, rect, &itemList, QTransform(), QTransform(), mode, Qt::AscendingOrder);
-    return itemList;
+    return d->index->items(rect, mode, Qt::AscendingOrder);
 }
 
 /*!
@@ -2712,7 +1621,7 @@ QList<QGraphicsItem *> QGraphicsScene::items(const QRectF &rect, Qt::ItemSelecti
 QList<QGraphicsItem *> QGraphicsScene::items(const QPolygonF &polygon, Qt::ItemSelectionMode mode) const
 {
     Q_D(const QGraphicsScene);
-    return d->items_helper(polygon, mode, Qt::AscendingOrder);
+    return d->index->items(polygon, mode, Qt::AscendingOrder);
 }
 
 /*!
@@ -2729,7 +1638,85 @@ QList<QGraphicsItem *> QGraphicsScene::items(const QPolygonF &polygon, Qt::ItemS
 QList<QGraphicsItem *> QGraphicsScene::items(const QPainterPath &path, Qt::ItemSelectionMode mode) const
 {
     Q_D(const QGraphicsScene);
-    return d->items_helper(path, mode, Qt::AscendingOrder);
+    return d->index->items(path, mode, Qt::AscendingOrder);
+}
+
+/*!
+    Returns all visible items that, depending on \a mode, are at the specified \a pos
+    and return a list sorted using \a order.
+
+    The default value for \a mode is Qt::IntersectsItemShape; all items whose
+    exact shape intersects with \a pos are returned.
+
+    \a deviceTransform is the transformation apply to the view.
+
+    \sa itemAt()
+*/
+QList<QGraphicsItem *> QGraphicsScene::items(const QPointF &pos, Qt::ItemSelectionMode mode,
+                                             Qt::SortOrder order, const QTransform &deviceTransform) const
+{
+    Q_D(const QGraphicsScene);
+    return d->index->items(pos, mode, order, deviceTransform);
+}
+
+/*!
+    \overload
+
+    Returns all visible items that, depending on \a mode, are either inside or
+    intersect with the specified \a rect and return a list sorted using \a order.
+
+    The default value for \a mode is Qt::IntersectsItemShape; all items whose
+    exact shape intersects with or is contained by \a rect are returned.
+
+    \a deviceTransform is the transformation apply to the view.
+
+    \sa itemAt()
+*/
+QList<QGraphicsItem *> QGraphicsScene::items(const QRectF &rect, Qt::ItemSelectionMode mode,
+                                             Qt::SortOrder order, const QTransform &deviceTransform) const
+{
+    Q_D(const QGraphicsScene);
+    return d->index->items(rect, mode, order, deviceTransform);
+}
+
+/*!
+    \overload
+
+    Returns all visible items that, depending on \a mode, are either inside or
+    intersect with the specified \a polygon and return a list sorted using \a order.
+
+    The default value for \a mode is Qt::IntersectsItemShape; all items whose
+    exact shape intersects with or is contained by \a polygon are returned.
+
+    \a deviceTransform is the transformation apply to the view.
+
+    \sa itemAt()
+*/
+QList<QGraphicsItem *> QGraphicsScene::items(const QPolygonF &polygon, Qt::ItemSelectionMode mode,
+                                             Qt::SortOrder order, const QTransform &deviceTransform) const
+{
+    Q_D(const QGraphicsScene);
+    return d->index->items(polygon, mode, order, deviceTransform);
+}
+
+/*!
+   \overload
+
+    Returns all visible items that, depending on \a mode, are either inside or
+    intersect with the specified \a path and return a list sorted using \a order.
+
+    The default value for \a mode is Qt::IntersectsItemShape; all items whose
+    exact shape intersects with or is contained by \a path are returned.
+
+    \a deviceTransform is the transformation apply to the view.
+
+    \sa itemAt()
+*/
+QList<QGraphicsItem *> QGraphicsScene::items(const QPainterPath &path, Qt::ItemSelectionMode mode,
+                                             Qt::SortOrder order, const QTransform &deviceTransform) const
+{
+    Q_D(const QGraphicsScene);
+    return d->index->items(path, mode, order, deviceTransform);
 }
 
 /*!
@@ -2752,12 +1739,12 @@ QList<QGraphicsItem *> QGraphicsScene::collidingItems(const QGraphicsItem *item,
         return QList<QGraphicsItem *>();
     }
 
+    // Does not support ItemIgnoresTransformations.
     QList<QGraphicsItem *> tmp;
-    foreach (QGraphicsItem *itemInVicinity, d->estimateItemsInRect(item->sceneBoundingRect())) {
+    foreach (QGraphicsItem *itemInVicinity, d->index->estimateItems(item->sceneBoundingRect(), Qt::AscendingOrder)) {
         if (item != itemInVicinity && item->collidesWithItem(itemInVicinity, mode))
             tmp << itemInVicinity;
     }
-    d->sortItems(&tmp, Qt::AscendingOrder, d->sortCacheEnabled);
     return tmp;
 }
 
@@ -2777,6 +1764,13 @@ QGraphicsItem *QGraphicsScene::itemAt(const QPointF &pos) const
     return itemsAtPoint.isEmpty() ? 0 : itemsAtPoint.first();
 }
 
+QGraphicsItem *QGraphicsScene::itemAt(const QPointF &pos, const QTransform &deviceTransform) const
+{
+    QList<QGraphicsItem *> itemsAtPoint = items(pos, Qt::IntersectsItemShape,
+                                                Qt::AscendingOrder, deviceTransform);
+    return itemsAtPoint.isEmpty() ? 0 : itemsAtPoint.first();
+}
+
 /*!
     \fn QGraphicsScene::itemAt(qreal x, qreal y) const
     \overload
@@ -2852,6 +1846,21 @@ void QGraphicsScene::setSelectionArea(const QPainterPath &path)
 */
 void QGraphicsScene::setSelectionArea(const QPainterPath &path, Qt::ItemSelectionMode mode)
 {
+    setSelectionArea(path, mode, QTransform());
+}
+
+/*!
+    \overload
+    \since 4.3
+
+    Sets the selection area to \a path using \a mode to determine if items are
+    included in the selection area.
+
+    \sa clearSelection(), selectionArea()
+*/
+void QGraphicsScene::setSelectionArea(const QPainterPath &path, Qt::ItemSelectionMode mode,
+                                      const QTransform &deviceTransform)
+{
     Q_D(QGraphicsScene);
 
     // Note: with boolean path operations, we can improve performance here
@@ -2867,7 +1876,7 @@ void QGraphicsScene::setSelectionArea(const QPainterPath &path, Qt::ItemSelectio
     bool changed = false;
 
     // Set all items in path to selected.
-    foreach (QGraphicsItem *item, items(path, mode)) {
+    foreach (QGraphicsItem *item, items(path, mode, Qt::AscendingOrder, deviceTransform)) {
         if (item->flags() & QGraphicsItem::ItemIsSelectable) {
             if (!item->isSelected())
                 changed = true;
@@ -2924,26 +1933,13 @@ void QGraphicsScene::clearSelection()
 void QGraphicsScene::clear()
 {
     Q_D(QGraphicsScene);
-    // Recursive descent delete
-    for (int i = 0; i < d->indexedItems.size(); ++i) {
-        if (QGraphicsItem *item = d->indexedItems.at(i)) {
-            if (!item->parentItem())
-                delete item;
-        }
-    }
-    QList<QGraphicsItem *> unindexedParents;
-    for (int i = 0; i < d->unindexedItems.size(); ++i) {
-        QGraphicsItem *item = d->unindexedItems.at(i);
-        if (!item->parentItem())
-            unindexedParents << item;
-    }
-    d->unindexedItems.clear();
-    qDeleteAll(unindexedParents);
-    d->indexedItems.clear();
-    d->freeItemIndexes.clear();
+    // NB! We have to clear the index before deleting items; otherwise the
+    // index might try to access dangling item pointers.
+    d->index->clear();
+    const QList<QGraphicsItem *> items = d->topLevelItems;
+    qDeleteAll(items);
+    Q_ASSERT(d->topLevelItems.isEmpty());
     d->lastItemCount = 0;
-    d->bspTree.clear();
-    d->largestUntransformableItem = QRectF();
     d->allItemsIgnoreHoverEvents = true;
     d->allItemsUseDefaultCursor = true;
     d->allItemsIgnoreTouchEvents = true;
@@ -3065,14 +2061,6 @@ void QGraphicsScene::addItem(QGraphicsItem *item)
         return;
     }
 
-    // Prevent reusing a recently deleted pointer: purge all removed items
-    // from our lists.
-    d->purgeRemovedItems();
-
-    // Invalidate any sort caching; arrival of a new item means we need to
-    // resort.
-    d->invalidateSortCache();
-
     // Detach this item from its parent if the parent's scene is different
     // from this scene.
     if (QGraphicsItem *itemParent = item->parentItem()) {
@@ -3083,29 +2071,18 @@ void QGraphicsScene::addItem(QGraphicsItem *item)
     // Add the item to this scene
     item->d_func()->scene = targetScene;
 
-    // Indexing requires sceneBoundingRect(), but because \a item might
-    // not be completely constructed at this point, we need to store it in
-    // a temporary list and schedule an indexing for later.
-    d->unindexedItems << item;
-    item->d_func()->index = -1;
-    d->startIndexTimer(0);
+    // Add the item in the index
+    d->index->addItem(item);
 
     // Add to list of toplevels if this item is a toplevel.
     if (!item->d_ptr->parent)
         d->registerTopLevelItem(item);
 
-    // Update the scene's sort cache settings.
-    item->d_ptr->globalStackingOrder = -1;
-    d->invalidateSortCache();
-
     // Add to list of items that require an update. We cannot assume that the
     // item is fully constructed, so calling item->update() can lead to a pure
     // virtual function call to boundingRect().
-    if (!d->updateAll) {
-        if (d->pendingUpdateItems.isEmpty())
-            QMetaObject::invokeMethod(this, "_q_updateLater", Qt::QueuedConnection);
-        d->pendingUpdateItems << item;
-    }
+    d->markDirty(item);
+    d->dirtyGrowingItemsBoundingRect = true;
 
     // Disable selectionChanged() for individual items
     ++d->selectionChanging;
@@ -4039,16 +3016,6 @@ bool QGraphicsScene::event(QEvent *event)
     case QEvent::TouchEnd:
         d->touchEventHandler(static_cast<QTouchEvent *>(event));
         break;
-    case QEvent::Timer:
-        if (d->indexTimerId && static_cast<QTimerEvent *>(event)->timerId() == d->indexTimerId) {
-            if (d->restartIndexTimer) {
-                d->restartIndexTimer = false;
-            } else {
-                // this call will kill the timer
-                d->_q_updateIndex();
-            }
-        }
-        // Fallthrough intended - support timers in subclasses.
     default:
         return QObject::event(event);
     }
@@ -5137,6 +4104,20 @@ void QGraphicsScenePrivate::drawItemHelper(QGraphicsItem *item, QPainter *painte
     }
 }
 
+void QGraphicsScenePrivate::drawItems(QPainter *painter, const QTransform *const viewTransform,
+                                      QRegion *exposedRegion, QWidget *widget)
+{
+    QRectF exposedSceneRect;
+    if (exposedRegion && indexMethod != QGraphicsScene::NoIndex) {
+        exposedSceneRect = exposedRegion->boundingRect().adjusted(-1, -1, 1, 1);
+        if (viewTransform)
+            exposedSceneRect = viewTransform->inverted().mapRect(exposedSceneRect);
+    }
+    const QList<QGraphicsItem *> tli = index->estimateTopLevelItems(exposedSceneRect, Qt::DescendingOrder);
+    for (int i = 0; i < tli.size(); ++i)
+        drawSubtreeRecursive(tli.at(i), painter, viewTransform, exposedRegion, widget);
+}
+
 void QGraphicsScenePrivate::drawSubtreeRecursive(QGraphicsItem *item, QPainter *painter,
                                                  const QTransform *const viewTransform,
                                                  QRegion *exposedRegion, QWidget *widget,
@@ -5159,6 +4140,7 @@ void QGraphicsScenePrivate::drawSubtreeRecursive(QGraphicsItem *item, QPainter *
 
     QTransform transform(Qt::Uninitialized);
     QTransform *transformPtr = 0;
+    bool translateOnlyTransform = false;
 #define ENSURE_TRANSFORM_PTR \
     if (!transformPtr) { \
         Q_ASSERT(!itemIsUntransformable); \
@@ -5168,6 +4150,7 @@ void QGraphicsScenePrivate::drawSubtreeRecursive(QGraphicsItem *item, QPainter *
             transformPtr = &transform; \
         } else { \
             transformPtr = &item->d_ptr->sceneTransform; \
+            translateOnlyTransform = item->d_ptr->sceneTransformTranslateOnly; \
         } \
     }
 
@@ -5179,10 +4162,8 @@ void QGraphicsScenePrivate::drawSubtreeRecursive(QGraphicsItem *item, QPainter *
         transform = item->deviceTransform(viewTransform ? *viewTransform : QTransform());
         transformPtr = &transform;
     } else if (item->d_ptr->dirtySceneTransform) {
-        item->d_ptr->sceneTransform = item->d_ptr->parent ? item->d_ptr->parent->d_ptr->sceneTransform
-                                                          : QTransform();
-        item->d_ptr->combineTransformFromParent(&item->d_ptr->sceneTransform);
-        item->d_ptr->dirtySceneTransform = 0;
+        item->d_ptr->updateSceneTransformFromParent();
+        Q_ASSERT(!item->d_ptr->dirtySceneTransform);
         wasDirtyParentSceneTransform = true;
     }
 
@@ -5191,7 +4172,8 @@ void QGraphicsScenePrivate::drawSubtreeRecursive(QGraphicsItem *item, QPainter *
     if (drawItem) {
         const QRectF brect = adjustedItemBoundingRect(item);
         ENSURE_TRANSFORM_PTR
-        QRect viewBoundingRect = transformPtr->mapRect(brect).toRect();
+        QRect viewBoundingRect = translateOnlyTransform ? brect.translated(transformPtr->dx(), transformPtr->dy()).toRect()
+                                                        : transformPtr->mapRect(brect).toRect();
         item->d_ptr->paintedViewBoundingRects.insert(widget, viewBoundingRect);
         viewBoundingRect.adjust(-1, -1, 1, 1);
         drawItem = exposedRegion ? exposedRegion->intersects(viewBoundingRect) : !viewBoundingRect.isEmpty();
@@ -5208,10 +4190,7 @@ void QGraphicsScenePrivate::drawSubtreeRecursive(QGraphicsItem *item, QPainter *
 
     int i = 0;
     if (itemHasChildren) {
-        if (item->d_ptr->needSortChildren) {
-            item->d_ptr->needSortChildren = 0;
-            qStableSort(item->d_ptr->children.begin(), item->d_ptr->children.end(), qt_notclosestLeaf);
-        }
+        item->d_ptr->ensureSortedChildren();
 
         if (itemClipsChildrenToShape) {
             painter->save();
@@ -5237,7 +4216,8 @@ void QGraphicsScenePrivate::drawSubtreeRecursive(QGraphicsItem *item, QPainter *
     if (drawItem) {
         Q_ASSERT(!itemIsFullyTransparent);
         Q_ASSERT(itemHasContents);
-        item->d_ptr->initStyleOption(&styleOptionTmp, transform, exposedRegion
+        ENSURE_TRANSFORM_PTR
+        item->d_ptr->initStyleOption(&styleOptionTmp, *transformPtr, exposedRegion
                                      ? *exposedRegion : QRegion(), exposedRegion == 0);
 
         const bool itemClipsToShape = item->d_ptr->flags & QGraphicsItem::ItemClipsToShape;
@@ -5245,10 +4225,9 @@ void QGraphicsScenePrivate::drawSubtreeRecursive(QGraphicsItem *item, QPainter *
         if (savePainter)
             painter->save();
 
-        if (!itemHasChildren || !itemClipsChildrenToShape) {
-            ENSURE_TRANSFORM_PTR
+        if (!itemHasChildren || !itemClipsChildrenToShape)
             painter->setWorldTransform(*transformPtr);
-        }
+
         if (itemClipsToShape)
             painter->setClipPath(item->shape(), Qt::IntersectClip);
         painter->setOpacity(opacity);
@@ -5291,6 +4270,16 @@ void QGraphicsScenePrivate::markDirty(QGraphicsItem *item, const QRectF &rect, b
                                           /*ignoreVisibleBit=*/force,
                                           /*ignoreDirtyBit=*/removingItemFromScene || invalidateChildren,
                                           /*ignoreOpacity=*/ignoreOpacity)) {
+        if (item->d_ptr->dirty) {
+            // The item is already marked as dirty and will be processed later. However,
+            // we have to make sure ignoreVisible and ignoreOpacity are set properly;
+            // otherwise things like: item->update(); item->hide() (force is now true)
+            // won't work as expected.
+            if (force)
+                item->d_ptr->ignoreVisible = 1;
+            if (ignoreOpacity)
+                item->d_ptr->ignoreOpacity = 1;
+        }
         return;
     }
 
@@ -5350,65 +4339,121 @@ void QGraphicsScenePrivate::markDirty(QGraphicsItem *item, const QRectF &rect, b
 }
 
 static inline bool updateHelper(QGraphicsViewPrivate *view, QGraphicsItemPrivate *item,
-                                const QRectF &rect, const QTransform &xform)
+                                const QRectF &rect, bool itemIsUntransformable)
 {
     Q_ASSERT(view);
     Q_ASSERT(item);
-    if (item->hasBoundingRegionGranularity)
+
+    QGraphicsItem *itemq = static_cast<QGraphicsItem *>(item->q_ptr);
+    QGraphicsView *viewq = static_cast<QGraphicsView *>(view->q_ptr);
+
+    if (itemIsUntransformable) {
+        const QTransform xform = itemq->deviceTransform(viewq->viewportTransform());
+        if (!item->hasBoundingRegionGranularity)
+            return view->updateRect(xform.mapRect(rect).toRect());
         return view->updateRegion(xform.map(QRegion(rect.toRect())));
-    return view->updateRect(xform.mapRect(rect).toRect());
+    }
+
+    if (item->sceneTransformTranslateOnly && view->identityMatrix) {
+        const qreal dx = item->sceneTransform.dx();
+        const qreal dy = item->sceneTransform.dy();
+        if (!item->hasBoundingRegionGranularity) {
+            QRectF r(rect);
+            r.translate(dx - view->horizontalScroll(), dy - view->verticalScroll());
+            return view->updateRect(r.toRect());
+        }
+        QRegion r(rect.toRect());
+        r.translate(qRound(dx) - view->horizontalScroll(), qRound(dy) - view->verticalScroll());
+        return view->updateRegion(r);
+    }
+
+    if (!viewq->isTransformed()) {
+        if (!item->hasBoundingRegionGranularity)
+            return view->updateRect(item->sceneTransform.mapRect(rect).toRect());
+        return view->updateRegion(item->sceneTransform.map(QRegion(rect.toRect())));
+    }
+
+    QTransform xform = item->sceneTransform;
+    xform *= viewq->viewportTransform();
+    if (!item->hasBoundingRegionGranularity)
+        return view->updateRect(xform.mapRect(rect).toRect());
+    return view->updateRegion(xform.map(QRegion(rect.toRect())));
 }
 
 void QGraphicsScenePrivate::processDirtyItemsRecursive(QGraphicsItem *item, bool dirtyAncestorContainsChildren,
                                                        qreal parentOpacity)
 {
     Q_Q(QGraphicsScene);
+    Q_ASSERT(item);
+    Q_ASSERT(!updateAll);
 
-    bool wasDirtyParentViewBoundingRects = false;
-    bool wasDirtyParentSceneTransform = false;
-    qreal opacity = parentOpacity;
+    if (!item->d_ptr->dirty && !item->d_ptr->dirtyChildren) {
+        resetDirtyItem(item);
+        return;
+    }
 
-    if (item) {
-        wasDirtyParentViewBoundingRects = item->d_ptr->paintedViewBoundingRectsNeedRepaint;
-        opacity = item->d_ptr->combineOpacityFromParent(parentOpacity);
-        const bool itemIsHidden = !item->d_ptr->ignoreVisible && !item->d_ptr->visible;
-        const bool itemIsFullyTransparent = !item->d_ptr->ignoreOpacity && opacity == 0.0;
-
-        if (item->d_ptr->dirtySceneTransform && !itemIsHidden && !item->d_ptr->itemIsUntransformable()
-            && !(itemIsFullyTransparent && item->d_ptr->childrenCombineOpacity())) {
-            // Calculate the full scene transform for this item.
-            item->d_ptr->sceneTransform = item->d_ptr->parent ? item->d_ptr->parent->d_ptr->sceneTransform
-                                                              : QTransform();
-            item->d_ptr->combineTransformFromParent(&item->d_ptr->sceneTransform);
-            item->d_ptr->dirtySceneTransform = 0;
-            wasDirtyParentSceneTransform = true;
-        }
+    const bool itemIsHidden = !item->d_ptr->ignoreVisible && !item->d_ptr->visible;
+    if (itemIsHidden) {
+        resetDirtyItem(item, /*recursive=*/true);
+        return;
+    }
+
+    const bool itemHasContents = !(item->d_ptr->flags & QGraphicsItem::ItemHasNoContents);
+    const bool itemHasChildren = !item->d_ptr->children.isEmpty();
+    if (!itemHasContents && !itemHasChildren) {
+        resetDirtyItem(item);
+        return; // Item has neither contents nor children!(?)
+    }
+
+    const qreal opacity = item->d_ptr->combineOpacityFromParent(parentOpacity);
+    const bool itemIsFullyTransparent = !item->d_ptr->ignoreOpacity && opacity < 0.0001;
+    if (itemIsFullyTransparent && (!itemHasChildren || item->d_ptr->childrenCombineOpacity())) {
+        resetDirtyItem(item, /*recursive=*/itemHasChildren);
+        return;
+    }
 
-        if (itemIsHidden || itemIsFullyTransparent || (item->d_ptr->flags & QGraphicsItem::ItemHasNoContents)) {
-            // Make sure we don't process invisible items or items with no content.
-            item->d_ptr->dirty = 0;
+    bool wasDirtyParentSceneTransform = item->d_ptr->dirtySceneTransform;
+    const bool itemIsUntransformable = item->d_ptr->itemIsUntransformable();
+    if (wasDirtyParentSceneTransform && !itemIsUntransformable) {
+        item->d_ptr->updateSceneTransformFromParent();
+        Q_ASSERT(!item->d_ptr->dirtySceneTransform);
+    }
+
+    const bool wasDirtyParentViewBoundingRects = item->d_ptr->paintedViewBoundingRectsNeedRepaint;
+    if (itemIsFullyTransparent || !itemHasContents || dirtyAncestorContainsChildren) {
+        // Make sure we don't process invisible items or items with no content.
+        item->d_ptr->dirty = 0;
+        item->d_ptr->fullUpdatePending = 0;
+        // Might have a dirty view bounding rect otherwise.
+        if (itemIsFullyTransparent || !itemHasContents)
             item->d_ptr->paintedViewBoundingRectsNeedRepaint = 0;
+    }
+
+    if (!hasSceneRect && item->d_ptr->geometryChanged && item->d_ptr->visible) {
+        // Update growingItemsBoundingRect.
+        if (item->d_ptr->sceneTransformTranslateOnly) {
+            growingItemsBoundingRect |= item->boundingRect().translated(item->d_ptr->sceneTransform.dx(),
+                                                                        item->d_ptr->sceneTransform.dy());
+        } else {
+            growingItemsBoundingRect |= item->d_ptr->sceneTransform.mapRect(item->boundingRect());
         }
     }
 
     // Process item.
-    if (item && (item->d_ptr->dirty || item->d_ptr->paintedViewBoundingRectsNeedRepaint)) {
+    if (item->d_ptr->dirty || item->d_ptr->paintedViewBoundingRectsNeedRepaint) {
         const bool useCompatUpdate = views.isEmpty() || (connectedSignals & changedSignalMask);
-        const bool untransformableItem = item->d_ptr->itemIsUntransformable();
         const QRectF itemBoundingRect = adjustedItemBoundingRect(item);
 
-        if (item->d_ptr->geometryChanged) {
-            // Update growingItemsBoundingRect.
-            if (!hasSceneRect)
-                growingItemsBoundingRect |= item->d_ptr->sceneTransform.mapRect(itemBoundingRect);
-            item->d_ptr->geometryChanged = 0;
-        }
-
-        if (useCompatUpdate && !untransformableItem && qFuzzyIsNull(item->boundingRegionGranularity())) {
+        if (useCompatUpdate && !itemIsUntransformable && qFuzzyIsNull(item->boundingRegionGranularity())) {
             // This block of code is kept for compatibility. Since 4.5, by default
             // QGraphicsView does not connect the signal and we use the below
             // method of delivering updates.
-            q->update(item->d_ptr->sceneTransform.mapRect(itemBoundingRect));
+            if (item->d_ptr->sceneTransformTranslateOnly) {
+                q->update(itemBoundingRect.translated(item->d_ptr->sceneTransform.dx(),
+                                                      item->d_ptr->sceneTransform.dy()));
+            } else {
+                q->update(item->d_ptr->sceneTransform.mapRect(itemBoundingRect));
+            }
         } else {
             QRectF dirtyRect;
             bool uninitializedDirtyRect = true;
@@ -5416,30 +4461,31 @@ void QGraphicsScenePrivate::processDirtyItemsRecursive(QGraphicsItem *item, bool
             for (int j = 0; j < views.size(); ++j) {
                 QGraphicsView *view = views.at(j);
                 QGraphicsViewPrivate *viewPrivate = view->d_func();
-                if (viewPrivate->fullUpdatePending)
-                    continue;
-                switch (viewPrivate->viewportUpdateMode) {
-                case QGraphicsView::NoViewportUpdate:
-                    continue;
-                case QGraphicsView::FullViewportUpdate:
-                    view->viewport()->update();
-                    viewPrivate->fullUpdatePending = 1;
+                QRect &paintedViewBoundingRect = item->d_ptr->paintedViewBoundingRects[viewPrivate->viewport];
+                if (viewPrivate->fullUpdatePending
+                    || viewPrivate->viewportUpdateMode == QGraphicsView::NoViewportUpdate) {
+                    // Okay, if we have a full update pending or no viewport update, this item's
+                    // paintedViewBoundingRect  will be updated correctly in the next paintEvent if
+                    // it is inside the viewport, but for now we can pretend that it is outside.
+                    paintedViewBoundingRect = QRect(-1, -1, -1, -1);
                     continue;
-                default:
-                    break;
                 }
 
-                QRect &paintedViewBoundingRect = item->d_ptr->paintedViewBoundingRects[viewPrivate->viewport];
-                if (item->d_ptr->paintedViewBoundingRectsNeedRepaint) {
-                    wasDirtyParentViewBoundingRects = true;
+                if (item->d_ptr->paintedViewBoundingRectsNeedRepaint && !paintedViewBoundingRect.isEmpty()) {
                     paintedViewBoundingRect.translate(viewPrivate->dirtyScrollOffset);
                     if (!viewPrivate->updateRect(paintedViewBoundingRect))
-                        paintedViewBoundingRect = QRect();
+                        paintedViewBoundingRect = QRect(-1, -1, -1, -1); // Outside viewport.
                 }
 
                 if (!item->d_ptr->dirty)
                     continue;
 
+                if (!item->d_ptr->paintedViewBoundingRectsNeedRepaint
+                    && paintedViewBoundingRect.x() == -1 && paintedViewBoundingRect.y() == -1
+                    && paintedViewBoundingRect.width() == -1 && paintedViewBoundingRect.height() == -1) {
+                    continue; // Outside viewport.
+                }
+
                 if (uninitializedDirtyRect) {
                     dirtyRect = itemBoundingRect;
                     if (!item->d_ptr->fullUpdatePending) {
@@ -5452,35 +4498,25 @@ void QGraphicsScenePrivate::processDirtyItemsRecursive(QGraphicsItem *item, bool
                 if (dirtyRect.isEmpty())
                     continue; // Discard updates outside the bounding rect.
 
-                bool valid = false;
-                if (untransformableItem) {
-                    valid = updateHelper(viewPrivate, item->d_ptr, dirtyRect,
-                                         item->deviceTransform(view->viewportTransform()));
-                } else if (!view->isTransformed()) {
-                    valid = updateHelper(viewPrivate, item->d_ptr, dirtyRect, item->d_ptr->sceneTransform);
-                } else {
-                    QTransform deviceTransform = item->d_ptr->sceneTransform;
-                    deviceTransform *= view->viewportTransform();
-                    valid = updateHelper(viewPrivate, item->d_ptr, dirtyRect, deviceTransform);
+                if (!updateHelper(viewPrivate, item->d_ptr, dirtyRect, itemIsUntransformable)
+                    && item->d_ptr->paintedViewBoundingRectsNeedRepaint) {
+                    paintedViewBoundingRect = QRect(-1, -1, -1, -1); // Outside viewport.
                 }
-                if (!valid)
-                    paintedViewBoundingRect = QRect();
             }
         }
     }
 
-    // Process root items / children.
-    if (!item || item->d_ptr->dirtyChildren) {
-        QList<QGraphicsItem *> *children = item ? &item->d_ptr->children : &topLevelItems;
-        const bool allChildrenDirty = item && item->d_ptr->allChildrenDirty;
+    // Process children.
+    if (itemHasChildren && item->d_ptr->dirtyChildren) {
         if (!dirtyAncestorContainsChildren) {
-            dirtyAncestorContainsChildren = item && item->d_ptr->fullUpdatePending
+            dirtyAncestorContainsChildren = item->d_ptr->fullUpdatePending
                                             && (item->d_ptr->flags & QGraphicsItem::ItemClipsChildrenToShape);
         }
-        const bool parentIgnoresVisible = item && item->d_ptr->ignoreVisible;
-        const bool parentIgnoresOpacity = item && item->d_ptr->ignoreOpacity;
-        for (int i = 0; i < children->size(); ++i) {
-            QGraphicsItem *child = children->at(i);
+        const bool allChildrenDirty = item->d_ptr->allChildrenDirty;
+        const bool parentIgnoresVisible = item->d_ptr->ignoreVisible;
+        const bool parentIgnoresOpacity = item->d_ptr->ignoreOpacity;
+        for (int i = 0; i < item->d_ptr->children.size(); ++i) {
+            QGraphicsItem *child = item->d_ptr->children.at(i);
             if (wasDirtyParentSceneTransform)
                 child->d_ptr->dirtySceneTransform = 1;
             if (wasDirtyParentViewBoundingRects)
@@ -5489,36 +4525,19 @@ void QGraphicsScenePrivate::processDirtyItemsRecursive(QGraphicsItem *item, bool
                 child->d_ptr->ignoreVisible = 1;
             if (parentIgnoresOpacity)
                 child->d_ptr->ignoreOpacity = 1;
-
             if (allChildrenDirty) {
                 child->d_ptr->dirty = 1;
                 child->d_ptr->fullUpdatePending = 1;
                 child->d_ptr->dirtyChildren = 1;
                 child->d_ptr->allChildrenDirty = 1;
-            } else if (!child->d_ptr->dirty && !child->d_ptr->dirtyChildren) {
-                resetDirtyItem(child);
-                continue;
-            }
-
-            if (dirtyAncestorContainsChildren || updateAll) {
-                // No need to process this child's dirty rect, hence reset the dirty state.
-                // However, we have to continue the recursion because it might have a dirty
-                // view bounding rect that needs repaint. We also have to reset the dirty
-                // state of its descendants.
-                child->d_ptr->dirty = 0;
-                child->d_ptr->fullUpdatePending = 0;
-                if (updateAll)
-                    child->d_ptr->paintedViewBoundingRectsNeedRepaint = 0;
             }
-
             processDirtyItemsRecursive(child, dirtyAncestorContainsChildren, opacity);
         }
     } else if (wasDirtyParentSceneTransform) {
         item->d_ptr->invalidateChildrenSceneTransform();
     }
 
-    if (item)
-        resetDirtyItem(item);
+    resetDirtyItem(item);
 }
 
 /*!
diff --git a/src/gui/graphicsview/qgraphicsscene.h b/src/gui/graphicsview/qgraphicsscene.h
index 6aaeb91..d790f90 100644
--- a/src/gui/graphicsview/qgraphicsscene.h
+++ b/src/gui/graphicsview/qgraphicsscene.h
@@ -83,6 +83,7 @@ class QGraphicsSimpleTextItem;
 class QGraphicsTextItem;
 class QGraphicsView;
 class QGraphicsWidget;
+class QGraphicsSceneIndex;
 class QHelpEvent;
 class QInputMethodEvent;
 class QKeyEvent;
@@ -152,22 +153,38 @@ public:
     QRectF itemsBoundingRect() const;
 
     QList<QGraphicsItem *> items() const;
-    QList<QGraphicsItem *> items(const QPointF &pos) const;
-    QList<QGraphicsItem *> items(const QRectF &rect, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
-    QList<QGraphicsItem *> items(const QPolygonF &polygon, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
-    QList<QGraphicsItem *> items(const QPainterPath &path, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
+    QList<QGraphicsItem *> items(Qt::SortOrder order) const; // ### Qt 5: unify
+
+    QList<QGraphicsItem *> items(const QPointF &pos, Qt::ItemSelectionMode mode, Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const;
+    QList<QGraphicsItem *> items(const QRectF &rect, Qt::ItemSelectionMode mode, Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const;
+    QList<QGraphicsItem *> items(const QPolygonF &polygon, Qt::ItemSelectionMode mode, Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const;
+    QList<QGraphicsItem *> items(const QPainterPath &path, Qt::ItemSelectionMode mode, Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const;
+
+    QList<QGraphicsItem *> items(const QPointF &pos) const; // ### obsolete
+    QList<QGraphicsItem *> items(const QRectF &rect, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const; // ### obsolete
+    QList<QGraphicsItem *> items(const QPolygonF &polygon, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const; // ### obsolete
+    QList<QGraphicsItem *> items(const QPainterPath &path, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const; // ### obsolete
+
     QList<QGraphicsItem *> collidingItems(const QGraphicsItem *item, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
-    QGraphicsItem *itemAt(const QPointF &pos) const;
+
+    QGraphicsItem *itemAt(const QPointF &pos) const; // ### obsolete
+    QGraphicsItem *itemAt(const QPointF &pos, const QTransform &deviceTransform) const;
 
     inline QList<QGraphicsItem *> items(qreal x, qreal y, qreal w, qreal h, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const
-    { return items(QRectF(x, y, w, h), mode); }
-    inline QGraphicsItem *itemAt(qreal x, qreal y) const
+    { return items(QRectF(x, y, w, h), mode); } // ### obsolete
+    inline QList<QGraphicsItem *> items(qreal x, qreal y, qreal w, qreal h, Qt::ItemSelectionMode mode, Qt::SortOrder order,
+                                        const QTransform &deviceTransform = QTransform()) const
+    { return items(QRectF(x, y, w, h), mode, order, deviceTransform); }
+    inline QGraphicsItem *itemAt(qreal x, qreal y) const // ### obsolete
     { return itemAt(QPointF(x, y)); }
+    inline QGraphicsItem *itemAt(qreal x, qreal y, const QTransform &deviceTransform) const
+    { return itemAt(QPointF(x, y), deviceTransform); }
 
     QList<QGraphicsItem *> selectedItems() const;
     QPainterPath selectionArea() const;
     void setSelectionArea(const QPainterPath &path);
-    void setSelectionArea(const QPainterPath &path, Qt::ItemSelectionMode);
+    void setSelectionArea(const QPainterPath &path, Qt::ItemSelectionMode mode);
+    void setSelectionArea(const QPainterPath &path, Qt::ItemSelectionMode mode, const QTransform &deviceTransform);
 
     QGraphicsItemGroup *createItemGroup(const QList<QGraphicsItem *> &items);
     void destroyItemGroup(QGraphicsItemGroup *group);
@@ -275,11 +292,8 @@ Q_SIGNALS:
 private:
     Q_DECLARE_PRIVATE(QGraphicsScene)
     Q_DISABLE_COPY(QGraphicsScene)
-    Q_PRIVATE_SLOT(d_func(), void _q_updateIndex())
     Q_PRIVATE_SLOT(d_func(), void _q_emitUpdated())
-    Q_PRIVATE_SLOT(d_func(), void _q_updateLater())
     Q_PRIVATE_SLOT(d_func(), void _q_polishItems())
-    Q_PRIVATE_SLOT(d_func(), void _q_updateSortCache())
     Q_PRIVATE_SLOT(d_func(), void _q_processDirtyItems())
     friend class QGraphicsItem;
     friend class QGraphicsItemPrivate;
@@ -287,6 +301,10 @@ private:
     friend class QGraphicsViewPrivate;
     friend class QGraphicsWidget;
     friend class QGraphicsWidgetPrivate;
+    friend class QGraphicsSceneIndex;
+    friend class QGraphicsSceneIndexPrivate;
+    friend class QGraphicsSceneBspTreeIndex;
+    friend class QGraphicsSceneBspTreeIndexPrivate;
 };
 
 Q_DECLARE_OPERATORS_FOR_FLAGS(QGraphicsScene::SceneLayers)
diff --git a/src/gui/graphicsview/qgraphicsscene_bsp.cpp b/src/gui/graphicsview/qgraphicsscene_bsp.cpp
index 3f3e58b..fb4b9a4 100644
--- a/src/gui/graphicsview/qgraphicsscene_bsp.cpp
+++ b/src/gui/graphicsview/qgraphicsscene_bsp.cpp
@@ -70,12 +70,15 @@ class QGraphicsSceneFindItemBspTreeVisitor : public QGraphicsSceneBspTreeVisitor
 {
 public:
     QList<QGraphicsItem *> *foundItems;
+    bool onlyTopLevelItems;
 
     void visit(QList<QGraphicsItem *> *items)
     {
         for (int i = 0; i < items->size(); ++i) {
             QGraphicsItem *item = items->at(i);
-            if (!item->d_func()->itemDiscovered && item->isVisible()) {
+            if (onlyTopLevelItems && item->d_ptr->parent)
+                item = item->topLevelItem();
+            if (!item->d_func()->itemDiscovered && item->d_ptr->visible) {
                 item->d_func()->itemDiscovered = 1;
                 foundItems->prepend(item);
             }
@@ -143,19 +146,15 @@ void QGraphicsSceneBspTree::removeItems(const QSet<QGraphicsItem *> &items)
     }
 }
 
-QList<QGraphicsItem *> QGraphicsSceneBspTree::items(const QRectF &rect)
+QList<QGraphicsItem *> QGraphicsSceneBspTree::items(const QRectF &rect, bool onlyTopLevelItems) const
 {
     QList<QGraphicsItem *> tmp;
     findVisitor->foundItems = &tmp;
+    findVisitor->onlyTopLevelItems = onlyTopLevelItems;
     climbTree(findVisitor, rect);
-    return tmp;
-}
-
-QList<QGraphicsItem *> QGraphicsSceneBspTree::items(const QPointF &pos)
-{
-    QList<QGraphicsItem *> tmp;
-    findVisitor->foundItems = &tmp;
-    climbTree(findVisitor, pos);
+    // Reset discovery bits.
+    for (int i = 0; i < tmp.size(); ++i)
+        tmp.at(i)->d_ptr->itemDiscovered = 0;
     return tmp;
 }
 
@@ -235,47 +234,17 @@ void QGraphicsSceneBspTree::initialize(const QRectF &rect, int depth, int index)
     }
 }
 
-void QGraphicsSceneBspTree::climbTree(QGraphicsSceneBspTreeVisitor *visitor, const QPointF &pos, int index)
-{
-    if (nodes.isEmpty())
-        return;
-
-    const Node &node = nodes.at(index);
-    int childIndex = firstChildIndex(index);
-
-    switch (node.type) {
-    case Node::Leaf: {
-        visitor->visit(&leaves[node.leafIndex]);
-        break;
-    }
-    case Node::Vertical:
-        if (pos.x() < node.offset) {
-            climbTree(visitor, pos, childIndex);
-        } else {
-            climbTree(visitor, pos, childIndex + 1);
-        }
-        break;
-    case Node::Horizontal:
-        if (pos.y() < node.offset) {
-            climbTree(visitor, pos, childIndex);
-        } else {
-            climbTree(visitor, pos, childIndex + 1);
-        }
-        break;
-    }
-}
-
-void QGraphicsSceneBspTree::climbTree(QGraphicsSceneBspTreeVisitor *visitor, const QRectF &rect, int index)
+void QGraphicsSceneBspTree::climbTree(QGraphicsSceneBspTreeVisitor *visitor, const QRectF &rect, int index) const
 {
     if (nodes.isEmpty())
         return;
 
     const Node &node = nodes.at(index);
-    int childIndex = firstChildIndex(index);
+    const int childIndex = firstChildIndex(index);
 
     switch (node.type) {
     case Node::Leaf: {
-        visitor->visit(&leaves[node.leafIndex]);
+        visitor->visit(const_cast<QList<QGraphicsItem*>*>(&leaves[node.leafIndex]));
         break;
     }
     case Node::Vertical:
@@ -288,7 +257,6 @@ void QGraphicsSceneBspTree::climbTree(QGraphicsSceneBspTreeVisitor *visitor, con
         }
         break;
     case Node::Horizontal:
-        int childIndex = firstChildIndex(index);
         if (rect.top() < node.offset) {
             climbTree(visitor, rect, childIndex);
             if (rect.bottom() >= node.offset)
diff --git a/src/gui/graphicsview/qgraphicsscene_bsp_p.h b/src/gui/graphicsview/qgraphicsscene_bsp_p.h
index 73a937f..4cac64a 100644
--- a/src/gui/graphicsview/qgraphicsscene_bsp_p.h
+++ b/src/gui/graphicsview/qgraphicsscene_bsp_p.h
@@ -92,8 +92,7 @@ public:
     void removeItem(QGraphicsItem *item, const QRectF &rect);
     void removeItems(const QSet<QGraphicsItem *> &items);
 
-    QList<QGraphicsItem *> items(const QRectF &rect);
-    QList<QGraphicsItem *> items(const QPointF &pos);
+    QList<QGraphicsItem *> items(const QRectF &rect, bool onlyTopLevelItems = false) const;
     int leafCount() const;
 
     inline int firstChildIndex(int index) const
@@ -106,11 +105,7 @@ public:
 
 private:
     void initialize(const QRectF &rect, int depth, int index);
-    void climbTree(QGraphicsSceneBspTreeVisitor *visitor, const QPointF &pos, int index = 0);
-    void climbTree(QGraphicsSceneBspTreeVisitor *visitor, const QRectF &rect, int index = 0);
-
-    void findItems(QList<QGraphicsItem *> *foundItems, const QRectF &rect, int index);
-    void findItems(QList<QGraphicsItem *> *foundItems, const QPointF &pos, int index);
+    void climbTree(QGraphicsSceneBspTreeVisitor *visitor, const QRectF &rect, int index = 0) const;
     QRectF rectForIndex(int index) const;
 
     QVector<Node> nodes;
diff --git a/src/gui/graphicsview/qgraphicsscene_p.h b/src/gui/graphicsview/qgraphicsscene_p.h
index dc720a7..ffd62d5 100644
--- a/src/gui/graphicsview/qgraphicsscene_p.h
+++ b/src/gui/graphicsview/qgraphicsscene_p.h
@@ -59,7 +59,6 @@
 
 #include "qgraphicssceneevent.h"
 #include "qgraphicsview.h"
-#include "qgraphicsscene_bsp_p.h"
 #include "qgraphicsitem_p.h"
 
 #include <private/qobject_p.h>
@@ -72,10 +71,9 @@
 #include <QtGui/qstyle.h>
 #include <QtGui/qstyleoption.h>
 
-static const int QGRAPHICSSCENE_INDEXTIMER_TIMEOUT = 2000;
-
 QT_BEGIN_NAMESPACE
 
+class QGraphicsSceneIndex;
 class QGraphicsView;
 class QGraphicsWidget;
 
@@ -86,24 +84,19 @@ public:
     QGraphicsScenePrivate();
     void init();
 
+    static QGraphicsScenePrivate *get(QGraphicsScene *q);
+
     quint32 changedSignalMask;
 
     QGraphicsScene::ItemIndexMethod indexMethod;
-    int bspTreeDepth;
-
-    QList<QGraphicsItem *> estimateItemsInRect(const QRectF &rect) const;
-    void addToIndex(QGraphicsItem *item);
-    void removeFromIndex(QGraphicsItem *item);
-    void resetIndex();
+    QGraphicsSceneIndex *index;
 
-    QGraphicsSceneBspTree bspTree;
-    void _q_updateIndex();
     int lastItemCount;
 
     QRectF sceneRect;
     bool hasSceneRect;
+    bool dirtyGrowingItemsBoundingRect;
     QRectF growingItemsBoundingRect;
-    QRectF largestUntransformableItem;
 
     void _q_emitUpdated();
     QList<QRectF> updatedRects;
@@ -114,9 +107,6 @@ public:
     QPainterPath selectionArea;
     int selectionChanging;
     QSet<QGraphicsItem *> selectedItems;
-    QList<QGraphicsItem *> unindexedItems;
-    QList<QGraphicsItem *> indexedItems;
-    QList<QGraphicsItem *> pendingUpdateItems;
     QList<QGraphicsItem *> unpolishedItems;
     QList<QGraphicsItem *> topLevelItems;
     bool needSortTopLevelItems;
@@ -128,21 +118,11 @@ public:
 
     void _q_processDirtyItems();
 
-    QList<int> freeItemIndexes;
-    bool regenerateIndex;
-
-    bool purgePending;
     void removeItemHelper(QGraphicsItem *item);
-    QSet<QGraphicsItem *> removedItems;
-    void purgeRemovedItems();
 
     QBrush backgroundBrush;
     QBrush foregroundBrush;
 
-    int indexTimerId;
-    bool restartIndexTimer;
-    void startIndexTimer(int interval = QGRAPHICSSCENE_INDEXTIMER_TIMEOUT);
-
     bool stickyFocus;
     bool hasFocus;
     QGraphicsItem *focusItem;
@@ -181,7 +161,6 @@ public:
     QList<QGraphicsItem *> itemsAtPosition(const QPoint &screenPos,
                                            const QPointF &scenePos,
                                            QWidget *widget) const;
-    static bool itemCollidesWithPath(QGraphicsItem *item, const QPainterPath &path, Qt::ItemSelectionMode mode);
     void storeMouseButtonsForMouseGrabber(QGraphicsSceneMouseEvent *event);
 
     QList<QGraphicsView *> views;
@@ -210,69 +189,14 @@ public:
     void mousePressEventHandler(QGraphicsSceneMouseEvent *mouseEvent);
     QGraphicsWidget *windowForItem(const QGraphicsItem *item) const;
 
-    QList<QGraphicsItem *> topLevelItemsInStackingOrder(const QTransform *const, QRegion *);
-    void recursive_items_helper(QGraphicsItem *item, QRectF rect, QList<QGraphicsItem *> *items,
-                                const QTransform &parentTransform, const QTransform &viewTransform,
-                                Qt::ItemSelectionMode mode, Qt::SortOrder order, qreal parentOpacity = 1.0) const;
-
-    QList<QGraphicsItem *> items_helper(const QPointF &pos) const;
-    QList<QGraphicsItem *> items_helper(const QRectF &rect,
-                                        Qt::ItemSelectionMode mode,
-                                        Qt::SortOrder order) const;
-    QList<QGraphicsItem *> items_helper(const QPolygonF &rect,
-                                        Qt::ItemSelectionMode mode,
-                                        Qt::SortOrder order) const;
-    QList<QGraphicsItem *> items_helper(const QPainterPath &rect,
-                                        Qt::ItemSelectionMode mode,
-                                        Qt::SortOrder order) const;
-    void childItems_helper(QList<QGraphicsItem *> *items,
-                           const QGraphicsItem *parent,
-                           const QPointF &pos) const;
-    void childItems_helper(QList<QGraphicsItem *> *items,
-                           const QGraphicsItem *parent,
-                           const QRectF &rect,
-                           Qt::ItemSelectionMode mode) const;
-    void childItems_helper(QList<QGraphicsItem *> *items,
-                           const QGraphicsItem *parent,
-                           const QPolygonF &polygon,
-                           Qt::ItemSelectionMode mode) const;
-    void childItems_helper(QList<QGraphicsItem *> *items,
-                           const QGraphicsItem *parent,
-                           const QPainterPath &path,
-                           Qt::ItemSelectionMode mode) const;
-
-    bool sortCacheEnabled;
-    bool updatingSortCache;
-    void invalidateSortCache();
-    static void climbTree(QGraphicsItem *item, int *stackingOrder);
-    void _q_updateSortCache();
-
-    static bool closestItemFirst_withoutCache(const QGraphicsItem *item1, const QGraphicsItem *item2);
-    static bool closestItemLast_withoutCache(const QGraphicsItem *item1, const QGraphicsItem *item2);
-
-    static inline bool closestItemFirst_withCache(const QGraphicsItem *item1, const QGraphicsItem *item2)
-    {
-        return item1->d_ptr->globalStackingOrder < item2->d_ptr->globalStackingOrder;
-    }
-    static inline bool closestItemLast_withCache(const QGraphicsItem *item1, const QGraphicsItem *item2)
-    {
-        return item1->d_ptr->globalStackingOrder >= item2->d_ptr->globalStackingOrder;
-    }
-
-    static void sortItems(QList<QGraphicsItem *> *itemList, Qt::SortOrder order, bool cached);
+    bool sortCacheEnabled; // for compatibility
 
     void drawItemHelper(QGraphicsItem *item, QPainter *painter,
                         const QStyleOptionGraphicsItem *option, QWidget *widget,
                         bool painterStateProtection);
 
-    inline void drawItems(QPainter *painter, const QTransform *const viewTransform,
-                          QRegion *exposedRegion, QWidget *widget)
-    {
-        const QList<QGraphicsItem *> tli = topLevelItemsInStackingOrder(viewTransform, exposedRegion);
-        for (int i = 0; i < tli.size(); ++i)
-            drawSubtreeRecursive(tli.at(i), painter, viewTransform, exposedRegion, widget);
-        return;
-    }
+    void drawItems(QPainter *painter, const QTransform *const viewTransform,
+                   QRegion *exposedRegion, QWidget *widget);
 
     void drawSubtreeRecursive(QGraphicsItem *item, QPainter *painter, const QTransform *const,
                               QRegion *exposedRegion, QWidget *widget, qreal parentOpacity = qreal(1.0));
@@ -282,18 +206,32 @@ public:
     void processDirtyItemsRecursive(QGraphicsItem *item, bool dirtyAncestorContainsChildren = false,
                                     qreal parentOpacity = qreal(1.0));
 
-    inline void resetDirtyItem(QGraphicsItem *item)
+    inline void resetDirtyItem(QGraphicsItem *item, bool recursive = false)
     {
         Q_ASSERT(item);
         item->d_ptr->dirty = 0;
         item->d_ptr->paintedViewBoundingRectsNeedRepaint = 0;
         item->d_ptr->geometryChanged = 0;
+        if (!item->d_ptr->dirtyChildren)
+            recursive = false;
         item->d_ptr->dirtyChildren = 0;
         item->d_ptr->needsRepaint = QRectF();
         item->d_ptr->allChildrenDirty = 0;
         item->d_ptr->fullUpdatePending = 0;
         item->d_ptr->ignoreVisible = 0;
         item->d_ptr->ignoreOpacity = 0;
+        if (recursive) {
+            for (int i = 0; i < item->d_ptr->children.size(); ++i)
+                resetDirtyItem(item->d_ptr->children.at(i), recursive);
+        }
+    }
+
+    inline void ensureSortedTopLevelItems()
+    {
+        if (needSortTopLevelItems) {
+            qSort(topLevelItems.begin(), topLevelItems.end(), qt_notclosestLeaf);
+            needSortTopLevelItems = false;
+        }
     }
 
     QStyle *style;
@@ -320,6 +258,25 @@ public:
     void updateInputMethodSensitivityInViews();
 };
 
+// QRectF::intersects() returns false always if either the source or target
+// rectangle's width or height are 0. This works around that problem.
+static inline void _q_adjustRect(QRectF *rect)
+{
+    Q_ASSERT(rect);
+    if (!rect->width())
+        rect->adjust(-0.00001, 0, 0.00001, 0);
+    if (!rect->height())
+        rect->adjust(0, -0.00001, 0, 0.00001);
+}
+
+static inline QRectF adjustedItemBoundingRect(const QGraphicsItem *item)
+{
+    Q_ASSERT(item);
+    QRectF boundingRect(item->boundingRect());
+    _q_adjustRect(&boundingRect);
+    return boundingRect;
+}
+
 QT_END_NAMESPACE
 
 #endif // QT_NO_GRAPHICSVIEW
diff --git a/src/gui/graphicsview/qgraphicsscenebsptreeindex.cpp b/src/gui/graphicsview/qgraphicsscenebsptreeindex.cpp
new file mode 100644
index 0000000..a54ade9
--- /dev/null
+++ b/src/gui/graphicsview/qgraphicsscenebsptreeindex.cpp
@@ -0,0 +1,782 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \class QGraphicsSceneBspTreeIndex
+    \brief The QGraphicsSceneBspTreeIndex class provides an implementation of
+    a BSP indexing algorithm for discovering items in QGraphicsScene.
+    \since 4.6
+    \ingroup multimedia
+    \ingroup graphicsview-api
+    \mainclass
+    \internal
+
+    QGraphicsSceneBspTreeIndex index use a BSP(Binary Space Partitioning)
+    implementation to discover items quickly. This implementation is
+    very efficient for static scene. It has a depth that you can set.
+    The depth directly affects performance and memory usage; the latter
+    growing exponentially with the depth of the tree. With an optimal tree
+    depth, the index can instantly determine the locality of items, even
+    for scenes with thousands or millions of items. This also greatly improves
+    rendering performance.
+
+    By default, the value is 0, in which case Qt will guess a reasonable
+    default depth based on the size, location and number of items in the
+    scene. If these parameters change frequently, however, you may experience
+    slowdowns as the index retunes the depth internally. You can avoid
+    potential slowdowns by fixating the tree depth through setting this
+    property.
+
+    The depth of the tree and the size of the scene rectangle decide the
+    granularity of the scene's partitioning. The size of each scene segment is
+    determined by the following algorithm:
+
+    The BSP tree has an optimal size when each segment contains between 0 and
+    10 items.
+
+    \sa QGraphicsScene, QGraphicsView, QGraphicsSceneIndex
+*/
+
+#ifndef QT_NO_GRAPHICSVIEW
+
+#include <private/qgraphicsscene_p.h>
+#include <private/qgraphicsscenebsptreeindex_p.h>
+#include <private/qgraphicssceneindex_p.h>
+
+#include <QtCore/qmath.h>
+#include <QtCore/qdebug.h>
+
+QT_BEGIN_NAMESPACE
+
+static inline int intmaxlog(int n)
+{
+    return  (n > 0 ? qMax(qCeil(qLn(qreal(n)) / qLn(qreal(2))), 5) : 0);
+}
+
+/*!
+    Constructs a private scene bsp index.
+*/
+QGraphicsSceneBspTreeIndexPrivate::QGraphicsSceneBspTreeIndexPrivate(QGraphicsScene *scene)
+    : QGraphicsSceneIndexPrivate(scene),
+    bspTreeDepth(0),
+    indexTimerId(0),
+    restartIndexTimer(false),
+    regenerateIndex(true),
+    lastItemCount(0),
+    purgePending(false),
+    sortCacheEnabled(false),
+    updatingSortCache(false)
+{
+}
+
+
+/*!
+    This method will update the BSP index by removing the items from the temporary
+    unindexed list and add them in the indexedItems list. This will also
+    update the growingItemsBoundingRect if needed. This will update the BSP
+    implementation as well.
+
+    \internal
+*/
+void QGraphicsSceneBspTreeIndexPrivate::_q_updateIndex()
+{
+    Q_Q(QGraphicsSceneBspTreeIndex);
+    if (!indexTimerId)
+        return;
+
+    q->killTimer(indexTimerId);
+    indexTimerId = 0;
+
+    purgeRemovedItems();
+
+     // Add unindexedItems to indexedItems
+    for (int i = 0; i < unindexedItems.size(); ++i) {
+        if (QGraphicsItem *item = unindexedItems.at(i)) {
+            Q_ASSERT(!item->d_ptr->itemDiscovered);
+            if (!freeItemIndexes.isEmpty()) {
+                int freeIndex = freeItemIndexes.takeFirst();
+                item->d_func()->index = freeIndex;
+                indexedItems[freeIndex] = item;
+            } else {
+                item->d_func()->index = indexedItems.size();
+                indexedItems << item;
+            }
+        }
+    }
+
+    // Determine whether we should regenerate the BSP tree.
+    if (bspTreeDepth == 0) {
+        int oldDepth = intmaxlog(lastItemCount);
+        bspTreeDepth = intmaxlog(indexedItems.size());
+        static const int slack = 100;
+        if (bsp.leafCount() == 0 || (oldDepth != bspTreeDepth && qAbs(lastItemCount - indexedItems.size()) > slack)) {
+            // ### Crude algorithm.
+            regenerateIndex = true;
+        }
+    }
+
+    // Regenerate the tree.
+    if (regenerateIndex) {
+        regenerateIndex = false;
+        bsp.initialize(sceneRect, bspTreeDepth);
+        unindexedItems = indexedItems;
+        lastItemCount = indexedItems.size();
+    }
+
+    // Insert all unindexed items into the tree.
+    for (int i = 0; i < unindexedItems.size(); ++i) {
+        if (QGraphicsItem *item = unindexedItems.at(i)) {
+            if (item->d_ptr->itemIsUntransformable()) {
+                untransformableItems << item;
+                continue;
+            }
+            if (item->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren)
+                continue;
+
+            bsp.insertItem(item, item->sceneBoundingRect());
+        }
+    }
+    unindexedItems.clear();
+}
+
+
+/*!
+    \internal
+
+    Removes stale pointers from all data structures.
+*/
+void QGraphicsSceneBspTreeIndexPrivate::purgeRemovedItems()
+{
+    if (!purgePending && removedItems.isEmpty())
+        return;
+
+    // Remove stale items from the BSP tree.
+    bsp.removeItems(removedItems);
+    // Purge this list.
+    removedItems.clear();
+    freeItemIndexes.clear();
+    for (int i = 0; i < indexedItems.size(); ++i) {
+        if (!indexedItems.at(i))
+            freeItemIndexes << i;
+    }
+    purgePending = false;
+}
+
+/*!
+    \internal
+
+    Starts or restarts the timer used for reindexing unindexed items.
+*/
+void QGraphicsSceneBspTreeIndexPrivate::startIndexTimer(int interval)
+{
+    Q_Q(QGraphicsSceneBspTreeIndex);
+    if (indexTimerId) {
+        restartIndexTimer = true;
+    } else {
+        indexTimerId = q->startTimer(interval);
+    }
+}
+
+/*!
+    \internal
+*/
+void QGraphicsSceneBspTreeIndexPrivate::resetIndex()
+{
+    purgeRemovedItems();
+    for (int i = 0; i < indexedItems.size(); ++i) {
+        if (QGraphicsItem *item = indexedItems.at(i)) {
+            item->d_ptr->index = -1;
+            Q_ASSERT(!item->d_ptr->itemDiscovered);
+            unindexedItems << item;
+        }
+    }
+    indexedItems.clear();
+    freeItemIndexes.clear();
+    untransformableItems.clear();
+    regenerateIndex = true;
+    startIndexTimer();
+}
+
+/*!
+    \internal
+*/
+void QGraphicsSceneBspTreeIndexPrivate::climbTree(QGraphicsItem *item, int *stackingOrder)
+{
+    if (!item->d_ptr->children.isEmpty()) {
+        QList<QGraphicsItem *> childList = item->d_ptr->children;
+        qSort(childList.begin(), childList.end(), qt_closestLeaf);
+        for (int i = 0; i < childList.size(); ++i) {
+            QGraphicsItem *item = childList.at(i);
+            if (!(item->flags() & QGraphicsItem::ItemStacksBehindParent))
+                climbTree(childList.at(i), stackingOrder);
+        }
+        item->d_ptr->globalStackingOrder = (*stackingOrder)++;
+        for (int i = 0; i < childList.size(); ++i) {
+            QGraphicsItem *item = childList.at(i);
+            if (item->flags() & QGraphicsItem::ItemStacksBehindParent)
+                climbTree(childList.at(i), stackingOrder);
+        }
+    } else {
+        item->d_ptr->globalStackingOrder = (*stackingOrder)++;
+    }
+}
+
+/*!
+    \internal
+*/
+void QGraphicsSceneBspTreeIndexPrivate::_q_updateSortCache()
+{
+    Q_Q(QGraphicsSceneBspTreeIndex);
+    _q_updateIndex();
+
+    if (!sortCacheEnabled || !updatingSortCache)
+        return;
+
+    updatingSortCache = false;
+    int stackingOrder = 0;
+
+    QList<QGraphicsItem *> topLevels;
+    const QList<QGraphicsItem *> items = q->items();
+    for (int i = 0; i < items.size(); ++i) {
+        QGraphicsItem *item = items.at(i);
+        if (item && !item->d_ptr->parent)
+            topLevels << item;
+    }
+
+    qSort(topLevels.begin(), topLevels.end(), qt_closestLeaf);
+    for (int i = 0; i < topLevels.size(); ++i)
+        climbTree(topLevels.at(i), &stackingOrder);
+}
+
+/*!
+    \internal
+*/
+void QGraphicsSceneBspTreeIndexPrivate::invalidateSortCache()
+{
+    Q_Q(QGraphicsSceneBspTreeIndex);
+    if (!sortCacheEnabled || updatingSortCache)
+        return;
+
+    updatingSortCache = true;
+    QMetaObject::invokeMethod(q, "_q_updateSortCache", Qt::QueuedConnection);
+}
+
+void QGraphicsSceneBspTreeIndexPrivate::addItem(QGraphicsItem *item, bool recursive)
+{
+    if (!item)
+        return;
+
+    // Prevent reusing a recently deleted pointer: purge all removed item from our lists.
+    purgeRemovedItems();
+
+    // Invalidate any sort caching; arrival of a new item means we need to resort.
+    // Update the scene's sort cache settings.
+    item->d_ptr->globalStackingOrder = -1;
+    invalidateSortCache();
+
+    // Indexing requires sceneBoundingRect(), but because \a item might
+    // not be completely constructed at this point, we need to store it in
+    // a temporary list and schedule an indexing for later.
+    if (item->d_ptr->index == -1) {
+        Q_ASSERT(!unindexedItems.contains(item));
+        unindexedItems << item;
+        startIndexTimer(0);
+    } else {
+        Q_ASSERT(indexedItems.contains(item));
+        qWarning("QGraphicsSceneBspTreeIndex::addItem: item has already been added to this BSP");
+    }
+
+    if (recursive) {
+        for (int i = 0; i < item->d_ptr->children.size(); ++i)
+            addItem(item->d_ptr->children.at(i), recursive);
+    }
+}
+
+void QGraphicsSceneBspTreeIndexPrivate::removeItem(QGraphicsItem *item, bool recursive,
+                                                   bool moveToUnindexedItems)
+{
+    if (!item)
+        return;
+
+    if (item->d_ptr->index != -1) {
+        Q_ASSERT(item->d_ptr->index < indexedItems.size());
+        Q_ASSERT(indexedItems.at(item->d_ptr->index) == item);
+        Q_ASSERT(!item->d_ptr->itemDiscovered);
+        freeItemIndexes << item->d_ptr->index;
+        indexedItems[item->d_ptr->index] = 0;
+        item->d_ptr->index = -1;
+
+        if (item->d_ptr->itemIsUntransformable()) {
+            untransformableItems.removeOne(item);
+        } else if (item->d_ptr->inDestructor) {
+            // Avoid virtual function calls from the destructor.
+            purgePending = true;
+            removedItems << item;
+        } else if (!(item->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren)) {
+            bsp.removeItem(item, item->sceneBoundingRect());
+        }
+    } else {
+        unindexedItems.removeOne(item);
+    }
+    invalidateSortCache(); // ### Only do this when removing from BSP?
+
+    Q_ASSERT(item->d_ptr->index == -1);
+    Q_ASSERT(!indexedItems.contains(item));
+    Q_ASSERT(!unindexedItems.contains(item));
+    Q_ASSERT(!untransformableItems.contains(item));
+
+    if (moveToUnindexedItems)
+        addItem(item);
+
+    if (recursive) {
+        for (int i = 0; i < item->d_ptr->children.size(); ++i)
+            removeItem(item->d_ptr->children.at(i), recursive, moveToUnindexedItems);
+    }
+}
+
+QList<QGraphicsItem *> QGraphicsSceneBspTreeIndexPrivate::estimateItems(const QRectF &rect, Qt::SortOrder order,
+                                                                        bool onlyTopLevelItems)
+{
+    Q_Q(QGraphicsSceneBspTreeIndex);
+    if (onlyTopLevelItems && rect.isNull())
+        return q->QGraphicsSceneIndex::estimateTopLevelItems(rect, order);
+
+    purgeRemovedItems();
+    _q_updateSortCache();
+    Q_ASSERT(unindexedItems.isEmpty());
+
+    QList<QGraphicsItem *> rectItems = bsp.items(rect, onlyTopLevelItems);
+    if (onlyTopLevelItems) {
+        for (int i = 0; i < untransformableItems.size(); ++i) {
+            QGraphicsItem *item = untransformableItems.at(i);
+            if (!item->d_ptr->parent) {
+                rectItems << item;
+            } else {
+                item = item->topLevelItem();
+                if (!rectItems.contains(item))
+                    rectItems << item;
+            }
+        }
+    } else {
+        rectItems += untransformableItems;
+    }
+
+    sortItems(&rectItems, order, sortCacheEnabled, onlyTopLevelItems);
+    return rectItems;
+}
+
+/*!
+    Returns true if \a item1 is on top of \a item2.
+
+    \internal
+*/
+bool QGraphicsSceneBspTreeIndexPrivate::closestItemFirst_withoutCache(const QGraphicsItem *item1, const QGraphicsItem *item2)
+{
+    // Siblings? Just check their z-values.
+    const QGraphicsItemPrivate *d1 = item1->d_ptr;
+    const QGraphicsItemPrivate *d2 = item2->d_ptr;
+    if (d1->parent == d2->parent)
+        return qt_closestLeaf(item1, item2);
+
+    // Find common ancestor, and each item's ancestor closest to the common
+    // ancestor.
+    int item1Depth = d1->depth;
+    int item2Depth = d2->depth;
+    const QGraphicsItem *p = item1;
+    const QGraphicsItem *t1 = item1;
+    while (item1Depth > item2Depth && (p = p->d_ptr->parent)) {
+        if (p == item2) {
+            // item2 is one of item1's ancestors; item1 is on top
+            return !(t1->d_ptr->flags & QGraphicsItem::ItemStacksBehindParent);
+        }
+        t1 = p;
+        --item1Depth;
+    }
+    p = item2;
+    const QGraphicsItem *t2 = item2;
+    while (item2Depth > item1Depth && (p = p->d_ptr->parent)) {
+        if (p == item1) {
+            // item1 is one of item2's ancestors; item1 is not on top
+            return (t2->d_ptr->flags & QGraphicsItem::ItemStacksBehindParent);
+        }
+        t2 = p;
+        --item2Depth;
+    }
+
+    // item1Ancestor is now at the same level as item2Ancestor, but not the same.
+    const QGraphicsItem *a1 = t1;
+    const QGraphicsItem *a2 = t2;
+    while (a1) {
+        const QGraphicsItem *p1 = a1;
+        const QGraphicsItem *p2 = a2;
+        a1 = a1->parentItem();
+        a2 = a2->parentItem();
+        if (a1 && a1 == a2)
+            return qt_closestLeaf(p1, p2);
+    }
+
+    // No common ancestor? Then just compare the items' toplevels directly.
+    return qt_closestLeaf(t1->topLevelItem(), t2->topLevelItem());
+}
+
+/*!
+    Returns true if \a item2 is on top of \a item1.
+
+    \internal
+*/
+bool QGraphicsSceneBspTreeIndexPrivate::closestItemLast_withoutCache(const QGraphicsItem *item1, const QGraphicsItem *item2)
+{
+    return closestItemFirst_withoutCache(item2, item1);
+}
+
+/*!
+    Sort a list of \a itemList in a specific \a order and use the cache if requested.
+
+    \internal
+*/
+void QGraphicsSceneBspTreeIndexPrivate::sortItems(QList<QGraphicsItem *> *itemList, Qt::SortOrder order,
+                                                  bool sortCacheEnabled, bool onlyTopLevelItems)
+{
+    if (order == Qt::SortOrder(-1))
+        return;
+
+    if (onlyTopLevelItems) {
+        if (order == Qt::AscendingOrder)
+            qSort(itemList->begin(), itemList->end(), qt_closestLeaf);
+        else if (order == Qt::DescendingOrder)
+            qSort(itemList->begin(), itemList->end(), qt_notclosestLeaf);
+        return;
+    }
+
+    if (sortCacheEnabled) {
+        if (order == Qt::AscendingOrder) {
+            qSort(itemList->begin(), itemList->end(), closestItemFirst_withCache);
+        } else if (order == Qt::DescendingOrder) {
+            qSort(itemList->begin(), itemList->end(), closestItemLast_withCache);
+        }
+    } else {
+        if (order == Qt::AscendingOrder) {
+            qSort(itemList->begin(), itemList->end(), closestItemFirst_withoutCache);
+        } else if (order == Qt::DescendingOrder) {
+            qSort(itemList->begin(), itemList->end(), closestItemLast_withoutCache);
+        }
+    }
+}
+
+/*!
+    Constructs a BSP scene index for the given \a scene.
+*/
+QGraphicsSceneBspTreeIndex::QGraphicsSceneBspTreeIndex(QGraphicsScene *scene)
+    : QGraphicsSceneIndex(*new QGraphicsSceneBspTreeIndexPrivate(scene), scene)
+{
+
+}
+
+QGraphicsSceneBspTreeIndex::~QGraphicsSceneBspTreeIndex()
+{
+    Q_D(QGraphicsSceneBspTreeIndex);
+    for (int i = 0; i < d->indexedItems.size(); ++i) {
+        // Ensure item bits are reset properly.
+        if (QGraphicsItem *item = d->indexedItems.at(i)) {
+            Q_ASSERT(!item->d_ptr->itemDiscovered);
+            item->d_ptr->index = -1;
+        }
+    }
+}
+
+/*!
+    \reimp
+    Clear the all the BSP index.
+*/
+void QGraphicsSceneBspTreeIndex::clear()
+{
+    Q_D(QGraphicsSceneBspTreeIndex);
+    d->bsp.clear();
+    d->lastItemCount = 0;
+    d->freeItemIndexes.clear();
+    for (int i = 0; i < d->indexedItems.size(); ++i) {
+        // Ensure item bits are reset properly.
+        if (QGraphicsItem *item = d->indexedItems.at(i)) {
+            Q_ASSERT(!item->d_ptr->itemDiscovered);
+            item->d_ptr->index = -1;
+        }
+    }
+    d->indexedItems.clear();
+    d->unindexedItems.clear();
+    d->untransformableItems.clear();
+}
+
+/*!
+    Add the \a item into the BSP index.
+*/
+void QGraphicsSceneBspTreeIndex::addItem(QGraphicsItem *item)
+{
+    Q_D(QGraphicsSceneBspTreeIndex);
+    d->addItem(item);
+}
+
+/*!
+    Remove the \a item from the BSP index.
+*/
+void QGraphicsSceneBspTreeIndex::removeItem(QGraphicsItem *item)
+{
+    Q_D(QGraphicsSceneBspTreeIndex);
+    d->removeItem(item);
+}
+
+/*!
+    \reimp
+    Update the BSP when the \a item 's bounding rect has changed.
+*/
+void QGraphicsSceneBspTreeIndex::prepareBoundingRectChange(const QGraphicsItem *item)
+{
+    if (!item)
+        return;
+
+    if (item->d_ptr->index == -1 || item->d_ptr->itemIsUntransformable()
+        || (item->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren)) {
+        return; // Item is not in BSP tree; nothing to do.
+    }
+
+    Q_D(QGraphicsSceneBspTreeIndex);
+    QGraphicsItem *thatItem = const_cast<QGraphicsItem *>(item);
+    d->removeItem(thatItem, /*recursive=*/false, /*moveToUnindexedItems=*/true);
+    for (int i = 0; i < item->d_ptr->children.size(); ++i)  // ### Do we really need this?
+        prepareBoundingRectChange(item->d_ptr->children.at(i));
+}
+
+/*!
+    Returns an estimation visible items that are either inside or
+    intersect with the specified \a rect and return a list sorted using \a order.
+
+    \a deviceTransform is the transformation apply to the view.
+
+*/
+QList<QGraphicsItem *> QGraphicsSceneBspTreeIndex::estimateItems(const QRectF &rect, Qt::SortOrder order) const
+{
+    Q_D(const QGraphicsSceneBspTreeIndex);
+    return const_cast<QGraphicsSceneBspTreeIndexPrivate*>(d)->estimateItems(rect, order);
+}
+
+QList<QGraphicsItem *> QGraphicsSceneBspTreeIndex::estimateTopLevelItems(const QRectF &rect, Qt::SortOrder order) const
+{
+    Q_D(const QGraphicsSceneBspTreeIndex);
+    return const_cast<QGraphicsSceneBspTreeIndexPrivate*>(d)->estimateItems(rect, order, /*onlyTopLevels=*/true);
+}
+
+/*!
+    \fn QList<QGraphicsItem *> QGraphicsSceneBspTreeIndex::items(Qt::SortOrder order = Qt::AscendingOrder) const;
+
+    Return all items in the BSP index and sort them using \a order.
+*/
+QList<QGraphicsItem *> QGraphicsSceneBspTreeIndex::items(Qt::SortOrder order) const
+{
+    Q_D(const QGraphicsSceneBspTreeIndex);
+    const_cast<QGraphicsSceneBspTreeIndexPrivate*>(d)->purgeRemovedItems();
+    QList<QGraphicsItem *> itemList;
+
+    // If freeItemIndexes is empty, we know there are no holes in indexedItems and
+    // unindexedItems.
+    if (d->freeItemIndexes.isEmpty()) {
+        if (d->unindexedItems.isEmpty()) {
+            itemList = d->indexedItems;
+        } else {
+            itemList = d->indexedItems + d->unindexedItems;
+        }
+    } else {
+        // Rebuild the list of items to avoid holes. ### We could also just
+        // compress the item lists at this point.
+        foreach (QGraphicsItem *item, d->indexedItems + d->unindexedItems) {
+            if (item)
+                itemList << item;
+        }
+    }
+    if (order != -1) {
+        //We sort descending order
+        d->sortItems(&itemList, order, d->sortCacheEnabled);
+    }
+    return itemList;
+}
+
+/*!
+    \property QGraphicsSceneBspTreeIndex::bspTreeDepth
+    \brief the depth of the BSP index tree
+    \since 4.6
+
+    This value determines the depth of BSP tree. The depth
+    directly affects performance and memory usage; the latter
+    growing exponentially with the depth of the tree. With an optimal tree
+    depth, the index can instantly determine the locality of items, even
+    for scenes with thousands or millions of items. This also greatly improves
+    rendering performance.
+
+    By default, the value is 0, in which case Qt will guess a reasonable
+    default depth based on the size, location and number of items in the
+    scene. If these parameters change frequently, however, you may experience
+    slowdowns as the index retunes the depth internally. You can avoid
+    potential slowdowns by fixating the tree depth through setting this
+    property.
+
+    The depth of the tree and the size of the scene rectangle decide the
+    granularity of the scene's partitioning. The size of each scene segment is
+    determined by the following algorithm:
+
+    The BSP tree has an optimal size when each segment contains between 0 and
+    10 items.
+
+*/
+int QGraphicsSceneBspTreeIndex::bspTreeDepth()
+{
+    Q_D(const QGraphicsSceneBspTreeIndex);
+    return d->bspTreeDepth;
+}
+
+void QGraphicsSceneBspTreeIndex::setBspTreeDepth(int depth)
+{
+    Q_D(QGraphicsSceneBspTreeIndex);
+    if (d->bspTreeDepth == depth)
+        return;
+    d->bspTreeDepth = depth;
+    d->resetIndex();
+}
+
+/*!
+    \reimp
+
+    This method react to the  \a rect change of the scene and
+    reset the BSP tree index.
+*/
+void QGraphicsSceneBspTreeIndex::updateSceneRect(const QRectF &rect)
+{
+    Q_D(QGraphicsSceneBspTreeIndex);
+    d->sceneRect = rect;
+    d->resetIndex();
+}
+
+/*!
+    \reimp
+
+    This method react to the \a change of the \a item and use the \a value to
+    update the BSP tree if necessary.
+
+*/
+void QGraphicsSceneBspTreeIndex::itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange change, const QVariant &value)
+{
+    Q_D(QGraphicsSceneBspTreeIndex);
+    switch (change) {
+    case QGraphicsItem::ItemFlagsChange: {
+        // Handle ItemIgnoresTransformations
+        bool ignoredTransform = item->d_ptr->flags & QGraphicsItem::ItemIgnoresTransformations;
+        bool willIgnoreTransform = value.toUInt() & QGraphicsItem::ItemIgnoresTransformations;
+        bool clipsChildren = item->d_ptr->flags & QGraphicsItem::ItemClipsChildrenToShape;
+        bool willClipChildren = value.toUInt() & QGraphicsItem::ItemClipsChildrenToShape;
+        if ((ignoredTransform != willIgnoreTransform) || (clipsChildren != willClipChildren)) {
+            QGraphicsItem *thatItem = const_cast<QGraphicsItem *>(item);
+            // Remove item and its descendants from the index and append
+            // them to the list of unindexed items. Then, when the index
+            // is updated, they will be put into the bsp-tree or the list
+            // of untransformable items.
+            d->removeItem(thatItem, /*recursive=*/true, /*moveToUnidexedItems=*/true);
+        }
+        break;
+    }
+    case QGraphicsItem::ItemZValueChange:
+        d->invalidateSortCache();
+        break;
+    case QGraphicsItem::ItemParentChange: {
+        d->invalidateSortCache();
+        // Handle ItemIgnoresTransformations
+        QGraphicsItem *newParent = qVariantValue<QGraphicsItem *>(value);
+        bool ignoredTransform = item->d_ptr->itemIsUntransformable();
+        bool willIgnoreTransform = (item->d_ptr->flags & QGraphicsItem::ItemIgnoresTransformations)
+                                   || (newParent && newParent->d_ptr->itemIsUntransformable());
+        bool ancestorClippedChildren = item->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren;
+        bool ancestorWillClipChildren = newParent
+                            && ((newParent->d_ptr->flags & QGraphicsItem::ItemClipsChildrenToShape)
+                                || (newParent->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren));
+        if ((ignoredTransform != willIgnoreTransform) || (ancestorClippedChildren != ancestorWillClipChildren)) {
+            QGraphicsItem *thatItem = const_cast<QGraphicsItem *>(item);
+            // Remove item and its descendants from the index and append
+            // them to the list of unindexed items. Then, when the index
+            // is updated, they will be put into the bsp-tree or the list
+            // of untransformable items.
+            d->removeItem(thatItem, /*recursive=*/true, /*moveToUnidexedItems=*/true);
+        }
+        break;
+    }
+    default:
+        break;
+    }
+    return QGraphicsSceneIndex::itemChange(item, change, value);
+}
+/*!
+    \reimp
+
+    Used to catch the timer event.
+
+    \internal
+*/
+bool QGraphicsSceneBspTreeIndex::event(QEvent *event)
+{
+    Q_D(QGraphicsSceneBspTreeIndex);
+    switch (event->type()) {
+    case QEvent::Timer:
+            if (d->indexTimerId && static_cast<QTimerEvent *>(event)->timerId() == d->indexTimerId) {
+                if (d->restartIndexTimer) {
+                    d->restartIndexTimer = false;
+                } else {
+                    // this call will kill the timer
+                    d->_q_updateIndex();
+                }
+            }
+     // Fallthrough intended - support timers in subclasses.
+    default:
+        return QObject::event(event);
+    }
+    return true;
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qgraphicsscenebsptreeindex_p.cpp"
+
+#endif  // QT_NO_GRAPHICSVIEW
+
diff --git a/src/gui/graphicsview/qgraphicsscenebsptreeindex_p.h b/src/gui/graphicsview/qgraphicsscenebsptreeindex_p.h
new file mode 100644
index 0000000..2e02458
--- /dev/null
+++ b/src/gui/graphicsview/qgraphicsscenebsptreeindex_p.h
@@ -0,0 +1,213 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of qapplication_*.cpp, qwidget*.cpp and qfiledialog.cpp.  This header
+// file may change from version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#ifndef QGRAPHICSBSPTREEINDEX_H
+#define QGRAPHICSBSPTREEINDEX_H
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Gui)
+
+#if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW
+
+#include "qgraphicssceneindex_p.h"
+#include "qgraphicsitem_p.h"
+#include "qgraphicsscene_bsp_p.h"
+
+#include <QtCore/qglobal.h>
+#include <QtCore/qrect.h>
+#include <QtCore/qlist.h>
+
+static const int QGRAPHICSSCENE_INDEXTIMER_TIMEOUT = 2000;
+
+class QGraphicsScene;
+class QGraphicsSceneBspTreeIndexPrivate;
+
+class Q_AUTOTEST_EXPORT QGraphicsSceneBspTreeIndex : public QGraphicsSceneIndex
+{
+    Q_OBJECT
+    Q_PROPERTY(int bspTreeDepth READ bspTreeDepth WRITE setBspTreeDepth)
+public:
+    QGraphicsSceneBspTreeIndex(QGraphicsScene *scene = 0);
+    ~QGraphicsSceneBspTreeIndex();
+
+    QList<QGraphicsItem *> estimateItems(const QRectF &rect, Qt::SortOrder order) const;
+    QList<QGraphicsItem *> estimateTopLevelItems(const QRectF &rect, Qt::SortOrder order) const;
+    QList<QGraphicsItem *> items(Qt::SortOrder order = Qt::AscendingOrder) const;
+
+    int bspTreeDepth();
+    void setBspTreeDepth(int depth);
+
+protected Q_SLOTS:
+    void updateSceneRect(const QRectF &rect);
+
+protected:
+    bool event(QEvent *event);
+    void clear();
+
+    void addItem(QGraphicsItem *item);
+    void removeItem(QGraphicsItem *item);
+    void prepareBoundingRectChange(const QGraphicsItem *item);
+
+    void itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange change, const QVariant &value);
+
+private :
+    Q_DECLARE_PRIVATE(QGraphicsSceneBspTreeIndex)
+    Q_DISABLE_COPY(QGraphicsSceneBspTreeIndex)
+    Q_PRIVATE_SLOT(d_func(), void _q_updateSortCache())
+    Q_PRIVATE_SLOT(d_func(), void _q_updateIndex())
+
+    friend class QGraphicsScene;
+    friend class QGraphicsScenePrivate;
+};
+
+class QGraphicsSceneBspTreeIndexPrivate : public QGraphicsSceneIndexPrivate
+{
+    Q_DECLARE_PUBLIC(QGraphicsSceneBspTreeIndex)
+public:
+    QGraphicsSceneBspTreeIndexPrivate(QGraphicsScene *scene);
+
+    QGraphicsSceneBspTree bsp;
+    QRectF sceneRect;
+    int bspTreeDepth;
+    int indexTimerId;
+    bool restartIndexTimer;
+    bool regenerateIndex;
+    int lastItemCount;
+
+    QList<QGraphicsItem *> indexedItems;
+    QList<QGraphicsItem *> unindexedItems;
+    QList<QGraphicsItem *> untransformableItems;
+    QList<int> freeItemIndexes;
+
+    bool purgePending;
+    QSet<QGraphicsItem *> removedItems;
+    void purgeRemovedItems();
+
+    void _q_updateIndex();
+    void startIndexTimer(int interval = QGRAPHICSSCENE_INDEXTIMER_TIMEOUT);
+    void resetIndex();
+
+    void _q_updateSortCache();
+    bool sortCacheEnabled;
+    bool updatingSortCache;
+    void invalidateSortCache();
+    void addItem(QGraphicsItem *item, bool recursive = false);
+    void removeItem(QGraphicsItem *item, bool recursive = false, bool moveToUnindexedItems = false);
+    QList<QGraphicsItem *> estimateItems(const QRectF &, Qt::SortOrder, bool b = false);
+
+    static void climbTree(QGraphicsItem *item, int *stackingOrder);
+    static bool closestItemFirst_withoutCache(const QGraphicsItem *item1, const QGraphicsItem *item2);
+    static bool closestItemLast_withoutCache(const QGraphicsItem *item1, const QGraphicsItem *item2);
+
+    static inline bool closestItemFirst_withCache(const QGraphicsItem *item1, const QGraphicsItem *item2)
+    {
+        return item1->d_ptr->globalStackingOrder < item2->d_ptr->globalStackingOrder;
+    }
+    static inline bool closestItemLast_withCache(const QGraphicsItem *item1, const QGraphicsItem *item2)
+    {
+        return item1->d_ptr->globalStackingOrder >= item2->d_ptr->globalStackingOrder;
+    }
+
+    static void sortItems(QList<QGraphicsItem *> *itemList, Qt::SortOrder order,
+                          bool cached, bool onlyTopLevelItems = false);
+};
+
+static inline bool QRectF_intersects(const QRectF &s, const QRectF &r)
+{
+    qreal xp = s.left();
+    qreal yp = s.top();
+    qreal w = s.width();
+    qreal h = s.height();
+    qreal l1 = xp;
+    qreal r1 = xp;
+    if (w < 0)
+        l1 += w;
+    else
+        r1 += w;
+
+    qreal l2 = r.left();
+    qreal r2 = r.left();
+    if (w < 0)
+        l2 += r.width();
+    else
+        r2 += r.width();
+
+    if (l1 >= r2 || l2 >= r1)
+        return false;
+
+    qreal t1 = yp;
+    qreal b1 = yp;
+    if (h < 0)
+        t1 += h;
+    else
+        b1 += h;
+
+    qreal t2 = r.top();
+    qreal b2 = r.top();
+    if (r.height() < 0)
+        t2 += r.height();
+    else
+        b2 += r.height();
+
+    return !(t1 >= b2 || t2 >= b1);
+}
+
+#endif // QT_NO_GRAPHICSVIEW
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QGRAPHICSBSPTREEINDEX_H
diff --git a/src/gui/graphicsview/qgraphicssceneindex.cpp b/src/gui/graphicsview/qgraphicssceneindex.cpp
new file mode 100644
index 0000000..01efde4
--- /dev/null
+++ b/src/gui/graphicsview/qgraphicssceneindex.cpp
@@ -0,0 +1,659 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+/*!
+    \class QGraphicsSceneIndex
+    \brief The QGraphicsSceneIndex class provides a base class to implement
+    a custom indexing algorithm for discovering items in QGraphicsScene.
+    \since 4.6
+    \ingroup multimedia
+    \ingroup graphicsview-api
+    \mainclass
+    \internal
+
+    The QGraphicsSceneIndex class provides a base class to implement
+    a custom indexing algorithm for discovering items in QGraphicsScene. You
+    need to subclass it and reimplement addItem, removeItem, estimateItems
+    and items in order to have an functional indexing.
+
+    \sa QGraphicsScene, QGraphicsView
+*/
+
+#include "qdebug.h"
+#include "qgraphicsscene.h"
+#include "qgraphicsitem_p.h"
+#include "qgraphicsscene_p.h"
+#include "qgraphicswidget.h"
+#include "qgraphicssceneindex_p.h"
+#include "qgraphicsscenebsptreeindex_p.h"
+
+#ifndef QT_NO_GRAPHICSVIEW
+
+QT_BEGIN_NAMESPACE
+
+class QGraphicsSceneIndexRectIntersector : public QGraphicsSceneIndexIntersector
+{
+public:
+    bool intersect(const QGraphicsItem *item, const QRectF &exposeRect, Qt::ItemSelectionMode mode,
+                   const QTransform &deviceTransform) const
+    {
+        QRectF brect = item->boundingRect();
+        _q_adjustRect(&brect);
+
+        // ### Add test for this (without making things slower?)
+        Q_UNUSED(exposeRect);
+
+        bool keep = true;
+        const QGraphicsItemPrivate *itemd = QGraphicsItemPrivate::get(item);
+        if (itemd->itemIsUntransformable()) {
+            // Untransformable items; map the scene rect to item coordinates.
+            const QTransform transform = item->deviceTransform(deviceTransform);
+            QRectF itemRect = (deviceTransform * transform.inverted()).mapRect(sceneRect);
+            if (mode == Qt::ContainsItemShape || mode == Qt::ContainsItemBoundingRect)
+                keep = itemRect.contains(brect) && itemRect != brect;
+            else
+                keep = itemRect.intersects(brect);
+            if (keep && (mode == Qt::ContainsItemShape || mode == Qt::IntersectsItemShape)) {
+                QPainterPath itemPath;
+                itemPath.addRect(itemRect);
+                keep = QGraphicsSceneIndexPrivate::itemCollidesWithPath(item, itemPath, mode);
+            }
+        } else {
+            Q_ASSERT(!itemd->dirtySceneTransform);
+            const QRectF itemSceneBoundingRect = itemd->sceneTransformTranslateOnly
+                                               ? brect.translated(itemd->sceneTransform.dx(),
+                                                                  itemd->sceneTransform.dy())
+                                               : itemd->sceneTransform.mapRect(brect);
+            if (mode == Qt::ContainsItemShape || mode == Qt::ContainsItemBoundingRect)
+                keep = sceneRect != brect && sceneRect.contains(itemSceneBoundingRect);
+            else
+                keep = sceneRect.intersects(itemSceneBoundingRect);
+            if (keep && (mode == Qt::ContainsItemShape || mode == Qt::IntersectsItemShape)) {
+                QPainterPath rectPath;
+                rectPath.addRect(sceneRect);
+                if (itemd->sceneTransformTranslateOnly)
+                    rectPath.translate(-itemd->sceneTransform.dx(), -itemd->sceneTransform.dy());
+                else
+                    rectPath = itemd->sceneTransform.inverted().map(rectPath);
+                keep = QGraphicsSceneIndexPrivate::itemCollidesWithPath(item, rectPath, mode);
+            }
+        }
+        return keep;
+    }
+
+    QRectF sceneRect;
+};
+
+class QGraphicsSceneIndexPointIntersector : public QGraphicsSceneIndexIntersector
+{
+public:
+    bool intersect(const QGraphicsItem *item, const QRectF &exposeRect, Qt::ItemSelectionMode mode,
+                   const QTransform &deviceTransform) const
+    {
+        QRectF brect = item->boundingRect();
+        _q_adjustRect(&brect);
+
+        // ### Add test for this (without making things slower?)
+        Q_UNUSED(exposeRect);
+
+        bool keep = false;
+        const QGraphicsItemPrivate *itemd = QGraphicsItemPrivate::get(item);
+        if (itemd->itemIsUntransformable()) {
+            // Untransformable items; map the scene point to item coordinates.
+            const QTransform transform = item->deviceTransform(deviceTransform);
+            QPointF itemPoint = (deviceTransform * transform.inverted()).map(scenePoint);
+            keep = brect.contains(itemPoint);
+            if (keep && (mode == Qt::ContainsItemShape || mode == Qt::IntersectsItemShape)) {
+                QPainterPath pointPath;
+                pointPath.addRect(QRectF(itemPoint, QSizeF(1, 1)));
+                keep = QGraphicsSceneIndexPrivate::itemCollidesWithPath(item, pointPath, mode);
+            }
+        } else {
+            Q_ASSERT(!itemd->dirtySceneTransform);
+            QRectF sceneBoundingRect = itemd->sceneTransformTranslateOnly
+                                     ? brect.translated(itemd->sceneTransform.dx(),
+                                                        itemd->sceneTransform.dy())
+                                     : itemd->sceneTransform.mapRect(brect);
+            keep = sceneBoundingRect.intersects(QRectF(scenePoint, QSizeF(1, 1)));
+            if (keep) {
+                QPointF p = itemd->sceneTransformTranslateOnly
+                          ? QPointF(scenePoint.x() - itemd->sceneTransform.dx(),
+                                    scenePoint.y() - itemd->sceneTransform.dy())
+                          : itemd->sceneTransform.inverted().map(scenePoint);
+                keep = item->contains(p);
+            }
+        }
+
+        return keep;
+    }
+
+    QPointF scenePoint;
+};
+
+class QGraphicsSceneIndexPathIntersector : public QGraphicsSceneIndexIntersector
+{
+public:
+    bool intersect(const QGraphicsItem *item, const QRectF &exposeRect, Qt::ItemSelectionMode mode,
+                   const QTransform &deviceTransform) const
+    {
+        QRectF brect = item->boundingRect();
+        _q_adjustRect(&brect);
+
+        // ### Add test for this (without making things slower?)
+        Q_UNUSED(exposeRect);
+
+        bool keep = true;
+        const QGraphicsItemPrivate *itemd = QGraphicsItemPrivate::get(item);
+        if (itemd->itemIsUntransformable()) {
+            // Untransformable items; map the scene rect to item coordinates.
+            const QTransform transform = item->deviceTransform(deviceTransform);
+            QPainterPath itemPath = (deviceTransform * transform.inverted()).map(scenePath);
+            if (mode == Qt::ContainsItemShape || mode == Qt::ContainsItemBoundingRect)
+                keep = itemPath.contains(brect);
+            else
+                keep = itemPath.intersects(brect);
+            if (keep && (mode == Qt::ContainsItemShape || mode == Qt::IntersectsItemShape))
+                keep = QGraphicsSceneIndexPrivate::itemCollidesWithPath(item, itemPath, mode);
+        } else {
+            Q_ASSERT(!itemd->dirtySceneTransform);
+            const QRectF itemSceneBoundingRect = itemd->sceneTransformTranslateOnly
+                                               ? brect.translated(itemd->sceneTransform.dx(),
+                                                                  itemd->sceneTransform.dy())
+                                               : itemd->sceneTransform.mapRect(brect);
+            if (mode == Qt::ContainsItemShape || mode == Qt::ContainsItemBoundingRect)
+                keep = scenePath.contains(itemSceneBoundingRect);
+            else
+                keep = scenePath.intersects(itemSceneBoundingRect);
+            if (keep && (mode == Qt::ContainsItemShape || mode == Qt::IntersectsItemShape)) {
+                QPainterPath itemPath = itemd->sceneTransformTranslateOnly
+                                      ? scenePath.translated(-itemd->sceneTransform.dx(),
+                                                             -itemd->sceneTransform.dy())
+                                      : itemd->sceneTransform.inverted().map(scenePath);
+                keep = QGraphicsSceneIndexPrivate::itemCollidesWithPath(item, itemPath, mode);
+            }
+        }
+        return keep;
+    }
+
+    QPainterPath scenePath;
+};
+
+/*!
+    Constructs a private scene index.
+*/
+QGraphicsSceneIndexPrivate::QGraphicsSceneIndexPrivate(QGraphicsScene *scene) : scene(scene)
+{
+    pointIntersector = new QGraphicsSceneIndexPointIntersector;
+    rectIntersector = new QGraphicsSceneIndexRectIntersector;
+    pathIntersector =  new QGraphicsSceneIndexPathIntersector;
+}
+
+/*!
+    Destructor of private scene index.
+*/
+QGraphicsSceneIndexPrivate::~QGraphicsSceneIndexPrivate()
+{
+    delete pointIntersector;
+    delete rectIntersector;
+    delete pathIntersector;
+}
+
+/*!
+    \internal
+
+    Checks if item collides with the path and mode, but also checks that if it
+    doesn't collide, maybe its frame rect will.
+*/
+bool QGraphicsSceneIndexPrivate::itemCollidesWithPath(const QGraphicsItem *item,
+                                                      const QPainterPath &path,
+                                                      Qt::ItemSelectionMode mode)
+{
+    if (item->collidesWithPath(path, mode))
+        return true;
+    if (item->isWidget()) {
+        // Check if this is a window, and if its frame rect collides.
+        const QGraphicsWidget *widget = static_cast<const QGraphicsWidget *>(item);
+        if (widget->isWindow()) {
+            QRectF frameRect = widget->windowFrameRect();
+            QPainterPath framePath;
+            framePath.addRect(frameRect);
+            bool intersects = path.intersects(frameRect);
+            if (mode == Qt::IntersectsItemShape || mode == Qt::IntersectsItemBoundingRect)
+                return intersects || path.contains(frameRect.topLeft())
+                    || framePath.contains(path.elementAt(0));
+            return !intersects && path.contains(frameRect.topLeft());
+        }
+    }
+    return false;
+}
+
+/*!
+    \internal
+*/
+void QGraphicsSceneIndexPrivate::recursive_items_helper(QGraphicsItem *item, QRectF exposeRect,
+                                                        QGraphicsSceneIndexIntersector *intersector,
+                                                        QList<QGraphicsItem *> *items,
+                                                        const QTransform &viewTransform,
+                                                        Qt::ItemSelectionMode mode, Qt::SortOrder order,
+                                                        qreal parentOpacity) const
+{
+    Q_ASSERT(item);
+    if (!item->d_ptr->visible)
+        return;
+
+    const qreal opacity = item->d_ptr->combineOpacityFromParent(parentOpacity);
+    const bool itemIsFullyTransparent = (opacity < 0.0001);
+    const bool itemHasChildren = !item->d_ptr->children.isEmpty();
+    if (itemIsFullyTransparent && (!itemHasChildren || item->d_ptr->childrenCombineOpacity()))
+        return;
+
+    // Update the item's scene transform if dirty.
+    const bool itemIsUntransformable = item->d_ptr->itemIsUntransformable();
+    const bool wasDirtyParentSceneTransform = item->d_ptr->dirtySceneTransform && !itemIsUntransformable;
+    if (wasDirtyParentSceneTransform) {
+        item->d_ptr->updateSceneTransformFromParent();
+        Q_ASSERT(!item->d_ptr->dirtySceneTransform);
+    }
+
+    const bool itemClipsChildrenToShape = (item->d_ptr->flags & QGraphicsItem::ItemClipsChildrenToShape);
+    bool processItem = !itemIsFullyTransparent;
+    if (processItem) {
+        processItem = intersector->intersect(item, exposeRect, mode, viewTransform);
+        if (!processItem && (!itemHasChildren || itemClipsChildrenToShape)) {
+            if (wasDirtyParentSceneTransform)
+                item->d_ptr->invalidateChildrenSceneTransform();
+            return;
+        }
+    } // else we know for sure this item has children we must process.
+
+    int i = 0;
+    if (itemHasChildren) {
+        // Sort children.
+        item->d_ptr->ensureSortedChildren();
+
+        // Clip to shape.
+        if (itemClipsChildrenToShape && !itemIsUntransformable) {
+            QPainterPath mappedShape = item->d_ptr->sceneTransformTranslateOnly
+                                     ? item->shape().translated(item->d_ptr->sceneTransform.dx(),
+                                                                item->d_ptr->sceneTransform.dy())
+                                     : item->d_ptr->sceneTransform.map(item->shape());
+            exposeRect &= mappedShape.controlPointRect();
+        }
+
+        // Process children behind
+        for (i = 0; i < item->d_ptr->children.size(); ++i) {
+            QGraphicsItem *child = item->d_ptr->children.at(i);
+            if (wasDirtyParentSceneTransform)
+                child->d_ptr->dirtySceneTransform = 1;
+            if (!(child->d_ptr->flags & QGraphicsItem::ItemStacksBehindParent))
+                break;
+            if (itemIsFullyTransparent && !(child->d_ptr->flags & QGraphicsItem::ItemIgnoresParentOpacity))
+                continue;
+            recursive_items_helper(child, exposeRect, intersector, items, viewTransform,
+                                   mode, order, opacity);
+        }
+    }
+
+    // Process item
+    if (processItem)
+        items->append(item);
+
+    // Process children in front
+    if (itemHasChildren) {
+        for (; i < item->d_ptr->children.size(); ++i) {
+            QGraphicsItem *child = item->d_ptr->children.at(i);
+            if (wasDirtyParentSceneTransform)
+                child->d_ptr->dirtySceneTransform = 1;
+            if (itemIsFullyTransparent && !(child->d_ptr->flags & QGraphicsItem::ItemIgnoresParentOpacity))
+                continue;
+            recursive_items_helper(child, exposeRect, intersector, items, viewTransform,
+                                   mode, order, opacity);
+        }
+    }
+}
+
+void QGraphicsSceneIndexPrivate::init()
+{
+    if (!scene)
+        return;
+
+    QObject::connect(scene, SIGNAL(sceneRectChanged(const QRectF&)),
+                     q_func(), SLOT(updateSceneRect(const QRectF&)));
+}
+
+/*!
+    Constructs an abstract scene index for a given \a scene.
+*/
+QGraphicsSceneIndex::QGraphicsSceneIndex(QGraphicsScene *scene)
+: QObject(*new QGraphicsSceneIndexPrivate(scene), scene)
+{
+    d_func()->init();
+}
+
+/*!
+    \internal
+*/
+QGraphicsSceneIndex::QGraphicsSceneIndex(QGraphicsSceneIndexPrivate &dd, QGraphicsScene *scene)
+    : QObject(dd, scene)
+{
+    d_func()->init();
+}
+
+/*!
+    Destroys the scene index.
+*/
+QGraphicsSceneIndex::~QGraphicsSceneIndex()
+{
+
+}
+
+/*!
+    Returns the scene of this index.
+*/
+QGraphicsScene* QGraphicsSceneIndex::scene() const
+{
+    Q_D(const QGraphicsSceneIndex);
+    return d->scene;
+}
+
+/*!
+    \fn QList<QGraphicsItem *> QGraphicsSceneIndex::items(const QPointF &pos,
+    Qt::ItemSelectionMode mode, Qt::SortOrder order, const QTransform
+    &deviceTransform) const
+
+    Returns all visible items that, depending on \a mode, are at the specified
+    \a pos and return a list sorted using \a order.
+
+    The default value for \a mode is Qt::IntersectsItemShape; all items whose
+    exact shape intersects with \a pos are returned.
+
+    \a deviceTransform is the transformation apply to the view.
+
+    This method use the estimation of the index (estimateItems) and refine the
+    list to get an exact result. If you want to implement your own refinement
+    algorithm you can reimplement this method.
+
+    \sa estimateItems()
+
+*/
+QList<QGraphicsItem *> QGraphicsSceneIndex::items(const QPointF &pos, Qt::ItemSelectionMode mode,
+                                                  Qt::SortOrder order, const QTransform &deviceTransform) const
+{
+
+    Q_D(const QGraphicsSceneIndex);
+    QList<QGraphicsItem *> itemList;
+    d->pointIntersector->scenePoint = pos;
+    d->items_helper(QRectF(pos, QSizeF(1, 1)), d->pointIntersector, &itemList, deviceTransform, mode, order);
+    return itemList;
+}
+
+/*!
+    \fn QList<QGraphicsItem *> QGraphicsSceneIndex::items(const QRectF &rect,
+    Qt::ItemSelectionMode mode, Qt::SortOrder order, const QTransform
+    &deviceTransform) const
+
+    \overload
+
+    Returns all visible items that, depending on \a mode, are either inside or
+    intersect with the specified \a rect and return a list sorted using \a order.
+
+    The default value for \a mode is Qt::IntersectsItemShape; all items whose
+    exact shape intersects with or is contained by \a rect are returned.
+
+    \a deviceTransform is the transformation apply to the view.
+
+    This method use the estimation of the index (estimateItems) and refine
+    the list to get an exact result. If you want to implement your own
+    refinement algorithm you can reimplement this method.
+
+    \sa estimateItems()
+
+*/
+QList<QGraphicsItem *> QGraphicsSceneIndex::items(const QRectF &rect, Qt::ItemSelectionMode mode,
+                                                  Qt::SortOrder order, const QTransform &deviceTransform) const
+{
+    Q_D(const QGraphicsSceneIndex);
+    QRectF exposeRect = rect;
+    _q_adjustRect(&exposeRect);
+    QList<QGraphicsItem *> itemList;
+    d->rectIntersector->sceneRect = rect;
+    d->items_helper(exposeRect, d->rectIntersector, &itemList, deviceTransform, mode, order);
+    return itemList;
+}
+
+/*!
+    \fn QList<QGraphicsItem *> QGraphicsSceneIndex::items(const QPolygonF
+    &polygon, Qt::ItemSelectionMode mode, Qt::SortOrder order, const
+    QTransform &deviceTransform) const
+
+    \overload
+
+    Returns all visible items that, depending on \a mode, are either inside or
+    intersect with the specified \a polygon and return a list sorted using \a order.
+
+    The default value for \a mode is Qt::IntersectsItemShape; all items whose
+    exact shape intersects with or is contained by \a polygon are returned.
+
+    \a deviceTransform is the transformation apply to the view.
+
+    This method use the estimation of the index (estimateItems) and refine
+    the list to get an exact result. If you want to implement your own
+    refinement algorithm you can reimplement this method.
+
+    \sa estimateItems()
+
+*/
+QList<QGraphicsItem *> QGraphicsSceneIndex::items(const QPolygonF &polygon, Qt::ItemSelectionMode mode,
+                                                  Qt::SortOrder order, const QTransform &deviceTransform) const
+{
+    Q_D(const QGraphicsSceneIndex);
+    QList<QGraphicsItem *> itemList;
+    QRectF exposeRect = polygon.boundingRect();
+    _q_adjustRect(&exposeRect);
+    QPainterPath path;
+    path.addPolygon(polygon);
+    d->pathIntersector->scenePath = path;
+    d->items_helper(exposeRect, d->pathIntersector, &itemList, deviceTransform, mode, order);
+    return itemList;
+}
+
+/*!
+    \fn QList<QGraphicsItem *> QGraphicsSceneIndex::items(const QPainterPath
+    &path, Qt::ItemSelectionMode mode, Qt::SortOrder order, const QTransform
+    &deviceTransform) const
+
+    \overload
+
+    Returns all visible items that, depending on \a mode, are either inside or
+    intersect with the specified \a path and return a list sorted using \a order.
+
+    The default value for \a mode is Qt::IntersectsItemShape; all items whose
+    exact shape intersects with or is contained by \a path are returned.
+
+    \a deviceTransform is the transformation apply to the view.
+
+    This method use the estimation of the index (estimateItems) and refine
+    the list to get an exact result. If you want to implement your own
+    refinement algorithm you can reimplement this method.
+
+    \sa estimateItems()
+
+*/
+QList<QGraphicsItem *> QGraphicsSceneIndex::items(const QPainterPath &path, Qt::ItemSelectionMode mode,
+                                                  Qt::SortOrder order, const QTransform &deviceTransform) const
+{
+    Q_D(const QGraphicsSceneIndex);
+    QList<QGraphicsItem *> itemList;
+    QRectF exposeRect = path.controlPointRect();
+    _q_adjustRect(&exposeRect);
+    d->pathIntersector->scenePath = path;
+    d->items_helper(exposeRect, d->pathIntersector, &itemList, deviceTransform, mode, order);
+    return itemList;
+}
+
+/*!
+    This virtual function return an estimation of items at position \a point.
+    This method return a list sorted using \a order.
+*/
+QList<QGraphicsItem *> QGraphicsSceneIndex::estimateItems(const QPointF &point, Qt::SortOrder order) const
+{
+    return estimateItems(QRectF(point, QSize(1, 1)), order);
+}
+
+QList<QGraphicsItem *> QGraphicsSceneIndex::estimateTopLevelItems(const QRectF &rect, Qt::SortOrder order) const
+{
+    Q_D(const QGraphicsSceneIndex);
+    Q_UNUSED(rect);
+    QGraphicsScenePrivate *scened = d->scene->d_func();
+    scened->ensureSortedTopLevelItems();
+    if (order == Qt::AscendingOrder) {
+        QList<QGraphicsItem *> sorted;
+        for (int i = scened->topLevelItems.size() - 1; i >= 0; --i)
+            sorted << scened->topLevelItems.at(i);
+        return sorted;
+    }
+    return scened->topLevelItems;
+}
+
+/*!
+    \fn virtual QList<QGraphicsItem *>
+    QGraphicsSceneIndex::estimateItems(const QRectF &rect, Qt::SortOrder
+    order, const QTransform &deviceTransform) const = 0
+
+    This pure virtual function return an estimation of items in the \a rect.
+    This method return a list sorted using \a order.
+
+    \a deviceTransform is the transformation apply to the view.
+*/
+
+/*!
+    \fn virtual QList<QGraphicsItem *>
+    QGraphicsSceneIndex::items(Qt::SortOrder order = Qt::AscendingOrder) const
+    = 0; This pure virtual function all items in the index and sort them using
+    \a order.
+*/
+
+
+/*!
+    Notifies the index that the scene's scene rect has changed. \a rect
+    is thew new scene rect.
+
+    \sa QGraphicsScene::sceneRect()
+*/
+void QGraphicsSceneIndex::updateSceneRect(const QRectF &rect)
+{
+    Q_UNUSED(rect);
+}
+
+/*!
+    This virtual function removes all items in the scene index.
+*/
+void QGraphicsSceneIndex::clear()
+{
+    const QList<QGraphicsItem *> allItems = items();
+    for (int i = 0 ; i < allItems.size(); ++i)
+        removeItem(allItems.at(i));
+}
+
+/*!
+    \fn virtual void QGraphicsSceneIndex::addItem(QGraphicsItem *item) = 0
+
+    This pure virtual function inserts an \a item to the scene index.
+
+    \sa removeItem(), deleteItem()
+*/
+
+/*!
+    \fn virtual void QGraphicsSceneIndex::removeItem(QGraphicsItem *item) = 0
+
+    This pure virtual function removes an \a item to the scene index.
+
+    \sa addItem(), deleteItem()
+*/
+
+/*!
+    This method is called when an \a item has been deleted.
+    The default implementation call removeItem. Be carefull,
+    if your implementation of removeItem use pure virtual method
+    of QGraphicsItem like boundingRect(), then you should reimplement
+    this method.
+
+    \sa addItem(), removeItem()
+*/
+void QGraphicsSceneIndex::deleteItem(QGraphicsItem *item)
+{
+    removeItem(item);
+}
+
+/*!
+    This virtual function is called by QGraphicsItem to notify the index
+    that some part of the \a item 's state changes. By reimplementing this
+    function, your can react to a change, and in some cases, (depending on \a
+    change,) adjustments in the index can be made.
+
+    \a change is the parameter of the item that is changing. \a value is the
+    value that changed; the type of the value depends on \a change.
+
+    The default implementation does nothing.
+
+    \sa QGraphicsItem::GraphicsItemChange
+*/
+void QGraphicsSceneIndex::itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange change, const QVariant &value)
+{
+    Q_UNUSED(item);
+    Q_UNUSED(change);
+    Q_UNUSED(value);
+}
+
+/*!
+    Notify the index for a geometry change of an \a item.
+
+    \sa QGraphicsItem::prepareGeometryChange()
+*/
+void QGraphicsSceneIndex::prepareBoundingRectChange(const QGraphicsItem *item)
+{
+    Q_UNUSED(item);
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qgraphicssceneindex_p.cpp"
+
+#endif // QT_NO_GRAPHICSVIEW
diff --git a/src/gui/graphicsview/qgraphicssceneindex_p.h b/src/gui/graphicsview/qgraphicssceneindex_p.h
new file mode 100644
index 0000000..8cf0294
--- /dev/null
+++ b/src/gui/graphicsview/qgraphicssceneindex_p.h
@@ -0,0 +1,182 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QGRAPHICSSCENEINDEX_H
+#define QGRAPHICSSCENEINDEX_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of qapplication_*.cpp, qwidget*.cpp and qfiledialog.cpp.  This header
+// file may change from version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qgraphicsscene_p.h"
+#include "qgraphicsscene.h"
+#include <private/qobject_p.h>
+
+#include <QtCore/qnamespace.h>
+#include <QtCore/qobject.h>
+#include <QtGui/qtransform.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Gui)
+
+#if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW
+
+class QGraphicsSceneIndexIntersector;
+class QGraphicsSceneIndexPointIntersector;
+class QGraphicsSceneIndexRectIntersector;
+class QGraphicsSceneIndexPathIntersector;
+class QGraphicsSceneIndexPrivate;
+class QPointF;
+class QRectF;
+template<typename T> class QList;
+
+class Q_AUTOTEST_EXPORT QGraphicsSceneIndex : public QObject
+{
+    Q_OBJECT
+
+public:
+    QGraphicsSceneIndex(QGraphicsScene *scene = 0);
+    virtual ~QGraphicsSceneIndex();
+
+    QGraphicsScene *scene() const;
+
+    virtual QList<QGraphicsItem *> items(Qt::SortOrder order = Qt::AscendingOrder) const  = 0;
+    virtual QList<QGraphicsItem *> items(const QPointF &pos, Qt::ItemSelectionMode mode,
+                                         Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const;
+    virtual QList<QGraphicsItem *> items(const QRectF &rect, Qt::ItemSelectionMode mode,
+                                         Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const;
+    virtual QList<QGraphicsItem *> items(const QPolygonF &polygon, Qt::ItemSelectionMode mode,
+                                         Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const;
+    virtual QList<QGraphicsItem *> items(const QPainterPath &path, Qt::ItemSelectionMode mode,
+                                         Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const;
+    virtual QList<QGraphicsItem *> estimateItems(const QPointF &point, Qt::SortOrder order) const;
+    virtual QList<QGraphicsItem *> estimateItems(const QRectF &rect, Qt::SortOrder order) const = 0;
+    virtual QList<QGraphicsItem *> estimateTopLevelItems(const QRectF &, Qt::SortOrder order) const;
+
+protected Q_SLOTS:
+    virtual void updateSceneRect(const QRectF &rect);
+
+protected:
+    virtual void clear();
+    virtual void addItem(QGraphicsItem *item) = 0;
+    virtual void removeItem(QGraphicsItem *item) = 0;
+    virtual void deleteItem(QGraphicsItem *item);
+
+    virtual void itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange, const QVariant &value);
+    virtual void prepareBoundingRectChange(const QGraphicsItem *item);
+
+    QGraphicsSceneIndex(QGraphicsSceneIndexPrivate &dd, QGraphicsScene *scene);
+
+    friend class QGraphicsScene;
+    friend class QGraphicsScenePrivate;
+    friend class QGraphicsItem;
+    friend class QGraphicsItemPrivate;
+    friend class QGraphicsSceneBspTreeIndex;
+private:
+    Q_DISABLE_COPY(QGraphicsSceneIndex)
+    Q_DECLARE_PRIVATE(QGraphicsSceneIndex)
+};
+
+class QGraphicsSceneIndexPrivate : public QObjectPrivate
+{
+    Q_DECLARE_PUBLIC(QGraphicsSceneIndex)
+public:
+    QGraphicsSceneIndexPrivate(QGraphicsScene *scene);
+    ~QGraphicsSceneIndexPrivate();
+
+    void init();
+    static bool itemCollidesWithPath(const QGraphicsItem *item, const QPainterPath &path, Qt::ItemSelectionMode mode);
+
+    void recursive_items_helper(QGraphicsItem *item, QRectF exposeRect,
+                                QGraphicsSceneIndexIntersector *intersector, QList<QGraphicsItem *> *items,
+                                const QTransform &viewTransform,
+                                Qt::ItemSelectionMode mode, Qt::SortOrder order, qreal parentOpacity = 1.0) const;
+    inline void items_helper(const QRectF &rect, QGraphicsSceneIndexIntersector *intersector,
+                             QList<QGraphicsItem *> *items, const QTransform &viewTransform,
+                             Qt::ItemSelectionMode mode, Qt::SortOrder order) const;
+
+    QGraphicsScene *scene;
+    QGraphicsSceneIndexPointIntersector *pointIntersector;
+    QGraphicsSceneIndexRectIntersector *rectIntersector;
+    QGraphicsSceneIndexPathIntersector *pathIntersector;
+};
+
+inline void QGraphicsSceneIndexPrivate::items_helper(const QRectF &rect, QGraphicsSceneIndexIntersector *intersector,
+                                                     QList<QGraphicsItem *> *items, const QTransform &viewTransform,
+                                                     Qt::ItemSelectionMode mode, Qt::SortOrder order) const
+{
+    Q_Q(const QGraphicsSceneIndex);
+    const QList<QGraphicsItem *> tli = q->estimateTopLevelItems(rect, Qt::DescendingOrder);
+    for (int i = 0; i < tli.size(); ++i)
+        recursive_items_helper(tli.at(i), rect, intersector, items, viewTransform, mode, order);
+    if (order == Qt::AscendingOrder) {
+        const int n = items->size();
+        for (int i = 0; i < n / 2; ++i)
+            items->swap(i, n - i - 1);
+    }
+}
+
+class QGraphicsSceneIndexIntersector
+{
+public:
+    QGraphicsSceneIndexIntersector() { }
+    virtual ~QGraphicsSceneIndexIntersector() { }
+    virtual bool intersect(const QGraphicsItem *item, const QRectF &exposeRect, Qt::ItemSelectionMode mode,
+                           const QTransform &deviceTransform) const = 0;
+};
+
+#endif // QT_NO_GRAPHICSVIEW
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QGRAPHICSSCENEINDEX_H
diff --git a/src/gui/graphicsview/qgraphicsscenelinearindex.cpp b/src/gui/graphicsview/qgraphicsscenelinearindex.cpp
new file mode 100644
index 0000000..5e6ac30
--- /dev/null
+++ b/src/gui/graphicsview/qgraphicsscenelinearindex.cpp
@@ -0,0 +1,62 @@
+/*!
+    \class QGraphicsSceneLinearIndex
+    \brief The QGraphicsSceneLinearIndex class provides an implementation of
+    a linear indexing algorithm for discovering items in QGraphicsScene.
+    \since 4.6
+    \ingroup multimedia
+    \ingroup graphicsview-api
+    \mainclass
+    \internal
+
+    QGraphicsSceneLinearIndex index is default linear implementation to discover items.
+    It basically store all items in a list and return them to the scene.
+
+    \sa QGraphicsScene, QGraphicsView, QGraphicsSceneIndex, QGraphicsSceneBspTreeIndex
+*/
+
+#include <private/qgraphicsscenelinearindex_p.h>
+
+/*!
+    \fn QGraphicsSceneLinearIndex::QGraphicsSceneLinearIndex(QGraphicsScene *scene = 0):
+
+    Construct a linear index for the given \a scene.
+*/
+
+/*!
+    \fn QList<QGraphicsItem *> QGraphicsSceneLinearIndex::items(Qt::SortOrder order = Qt::AscendingOrder) const;
+
+    Return all items in the index and sort them using \a order.
+*/
+
+
+/*!
+    \fn virtual QList<QGraphicsItem *> QGraphicsSceneLinearIndex::estimateItems(const QRectF &rect, Qt::SortOrder order) const;
+
+    Returns an estimation visible items that are either inside or
+    intersect with the specified \a rect and return a list sorted using \a order.
+*/
+
+/*!
+    \fn QRectF QGraphicsSceneLinearIndex::indexedRect() const;
+    \reimp
+    Return the rect indexed by the the index.
+*/
+
+/*!
+    \fn void QGraphicsSceneLinearIndex::clear();
+    \reimp
+    Clear the all the BSP index.
+*/
+
+/*!
+    \fn virtual void QGraphicsSceneLinearIndex::addItem(QGraphicsItem *item);
+
+    Add the \a item into the index.
+*/
+
+/*!
+    \fn virtual void QGraphicsSceneLinearIndex::removeItem(QGraphicsItem *item);
+
+    Add the \a item from the index.
+*/
+
diff --git a/src/gui/graphicsview/qgraphicsscenelinearindex_p.h b/src/gui/graphicsview/qgraphicsscenelinearindex_p.h
new file mode 100644
index 0000000..56dde3a
--- /dev/null
+++ b/src/gui/graphicsview/qgraphicsscenelinearindex_p.h
@@ -0,0 +1,109 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QGRAPHICSSCENELINEARINDEX_H
+#define QGRAPHICSSCENELINEARINDEX_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of other Qt classes.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/qlist.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Gui)
+
+#if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW
+
+#include <QtCore/qrect.h>
+#include <QtCore/qlist.h>
+#include <QtGui/qgraphicsitem.h>
+#include <private/qgraphicssceneindex_p.h>
+
+class Q_AUTOTEST_EXPORT QGraphicsSceneLinearIndex : public QGraphicsSceneIndex
+{
+    Q_OBJECT
+
+public:
+    QGraphicsSceneLinearIndex(QGraphicsScene *scene = 0) : QGraphicsSceneIndex(scene)
+    { }
+
+    QList<QGraphicsItem *> items(Qt::SortOrder order = Qt::AscendingOrder) const
+    { Q_UNUSED(order); return m_items; }
+
+    virtual QList<QGraphicsItem *> estimateItems(const QRectF &rect, Qt::SortOrder order) const
+    {
+        Q_UNUSED(rect);
+        Q_UNUSED(order);
+        return m_items;
+    }
+
+protected :
+    virtual void clear()
+    { m_items.clear(); }
+
+    virtual void addItem(QGraphicsItem *item)
+    { m_items << item; }
+
+    virtual void removeItem(QGraphicsItem *item)
+    { m_items.removeOne(item); }
+
+private:
+    QList<QGraphicsItem*> m_items;
+};
+
+#endif // QT_NO_GRAPHICSVIEW
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QGRAPHICSSCENELINEARINDEX_H
diff --git a/src/gui/graphicsview/qgraphicsview.cpp b/src/gui/graphicsview/qgraphicsview.cpp
index 3b29552..bcfd68c 100644
--- a/src/gui/graphicsview/qgraphicsview.cpp
+++ b/src/gui/graphicsview/qgraphicsview.cpp
@@ -813,19 +813,9 @@ QRegion QGraphicsViewPrivate::mapToViewRegion(const QGraphicsItem *item, const Q
     return item->boundingRegion(itv) & itv.mapRect(rect).toAlignedRect();
 }
 
-// QRectF::intersects() returns false always if either the source or target
-// rectangle's width or height are 0. This works around that problem.
-static inline QRectF adjustedItemBoundingRect(const QGraphicsItem *item)
-{
-    Q_ASSERT(item);
-    QRectF boundingRect(item->boundingRect());
-    if (!boundingRect.width())
-        boundingRect.adjust(-0.00001, 0, 0.00001, 0);
-    if (!boundingRect.height())
-        boundingRect.adjust(0, -0.00001, 0, 0.00001);
-    return boundingRect;
-}
-
+/*!
+    \internal
+*/
 void QGraphicsViewPrivate::processPendingUpdates()
 {
     if (!scene)
@@ -850,13 +840,29 @@ void QGraphicsViewPrivate::processPendingUpdates()
     dirtyRegion = QRegion();
 }
 
+static inline bool intersectsViewport(const QRect &r, int width, int height)
+{ return !(r.left() > width) && !(r.right() < 0) && !(r.top() >= height) && !(r.bottom() < 0); }
+
+static inline bool containsViewport(const QRect &r, int width, int height)
+{ return r.left() <= 0 && r.top() <= 0 && r.right() >= width - 1 && r.bottom() >= height - 1; }
+
+static inline void QRect_unite(QRect *rect, const QRect &other)
+{
+    if (rect->isEmpty()) {
+        *rect = other;
+    } else {
+        rect->setCoords(qMin(rect->left(), other.left()), qMin(rect->top(), other.top()),
+                        qMax(rect->right(), other.right()), qMax(rect->bottom(), other.bottom()));
+    }
+}
+
 bool QGraphicsViewPrivate::updateRegion(const QRegion &r)
 {
     if (fullUpdatePending || viewportUpdateMode == QGraphicsView::NoViewportUpdate || r.isEmpty())
         return false;
 
     const QRect boundingRect = r.boundingRect();
-    if (!boundingRect.intersects(viewport->rect()))
+    if (!intersectsViewport(boundingRect, viewport->width(), viewport->height()))
         return false; // Update region outside viewport.
 
     switch (viewportUpdateMode) {
@@ -865,8 +871,8 @@ bool QGraphicsViewPrivate::updateRegion(const QRegion &r)
         viewport->update();
         break;
     case QGraphicsView::BoundingRectViewportUpdate:
-        dirtyBoundingRect |= boundingRect;
-        if (dirtyBoundingRect.contains(viewport->rect())) {
+        QRect_unite(&dirtyBoundingRect, boundingRect);
+        if (containsViewport(dirtyBoundingRect, viewport->width(), viewport->height())) {
             fullUpdatePending = true;
             viewport->update();
         }
@@ -893,7 +899,7 @@ bool QGraphicsViewPrivate::updateRegion(const QRegion &r)
 bool QGraphicsViewPrivate::updateRect(const QRect &r)
 {
     if (fullUpdatePending || viewportUpdateMode == QGraphicsView::NoViewportUpdate
-        || !r.intersects(viewport->rect())) {
+        || !intersectsViewport(r, viewport->width(), viewport->height())) {
         return false;
     }
 
@@ -903,8 +909,8 @@ bool QGraphicsViewPrivate::updateRect(const QRect &r)
         viewport->update();
         break;
     case QGraphicsView::BoundingRectViewportUpdate:
-        dirtyBoundingRect |= r;
-        if (dirtyBoundingRect.contains(viewport->rect())) {
+        QRect_unite(&dirtyBoundingRect, r);
+        if (containsViewport(dirtyBoundingRect, viewport->width(), viewport->height())) {
             fullUpdatePending = true;
             viewport->update();
         }
@@ -955,47 +961,32 @@ extern QPainterPath qt_regionToPath(const QRegion &region);
     is at risk of painting 1 pixel outside the bounding rect. Therefore we
     must search for items with an adjustment of (-1, -1, 1, 1).
 */
-QList<QGraphicsItem *> QGraphicsViewPrivate::findItems(const QRegion &exposedRegion, bool *allItems) const
+QList<QGraphicsItem *> QGraphicsViewPrivate::findItems(const QRegion &exposedRegion, bool *allItems,
+                                                       const QTransform &viewTransform) const
 {
     Q_Q(const QGraphicsView);
 
     // Step 1) If all items are contained within the expose region, then
-    // return a list of all visible items.
+    // return a list of all visible items. ### the scene's growing bounding
+    // rect does not take into account untransformable items.
     const QRectF exposedRegionSceneBounds = q->mapToScene(exposedRegion.boundingRect().adjusted(-1, -1, 1, 1))
                                             .boundingRect();
-    if (exposedRegionSceneBounds.contains(scene->d_func()->growingItemsBoundingRect)) {
+    if (exposedRegionSceneBounds.contains(scene->sceneRect())) {
         Q_ASSERT(allItems);
         *allItems = true;
 
-        // All items are guaranteed within the exposed region, don't bother using the index.
-        QList<QGraphicsItem *> itemList(scene->items());
-        int i = 0;
-        while (i < itemList.size()) {
-            const QGraphicsItem *item = itemList.at(i);
-            // But we only want to include items that are visible
-            // The following check is basically the same as item->d_ptr->isInvisible(), except
-            // that we don't check whether the item clips children to shape or propagates its
-            // opacity (we loop through all items, so those checks are wrong in this context).
-            if (!item->isVisible() || item->d_ptr->isClippedAway() || item->d_ptr->isFullyTransparent())
-                itemList.removeAt(i);
-            else
-                ++i;
-        }
-
-        // Sort the items.
-        QGraphicsScenePrivate::sortItems(&itemList, Qt::DescendingOrder, scene->d_func()->sortCacheEnabled);
-        return itemList;
+        // All items are guaranteed within the exposed region.
+        return scene->items(Qt::DescendingOrder);
     }
 
     // Step 2) If the expose region is a simple rect and the view is only
     // translated or scaled, search for items using
     // QGraphicsScene::items(QRectF).
-    bool simpleRectLookup =  (scene->d_func()->largestUntransformableItem.isNull()
-                              && exposedRegion.numRects() == 1 && matrix.type() <= QTransform::TxScale);
+    bool simpleRectLookup =  exposedRegion.numRects() == 1 && matrix.type() <= QTransform::TxScale;
     if (simpleRectLookup) {
-        return scene->d_func()->items_helper(exposedRegionSceneBounds,
-                                             Qt::IntersectsItemBoundingRect,
-                                             Qt::DescendingOrder);
+        return scene->items(exposedRegionSceneBounds,
+                            Qt::IntersectsItemBoundingRect,
+                            Qt::DescendingOrder, viewTransform);
     }
 
     // If the region is complex or the view has a complex transform, adjust
@@ -1005,16 +996,9 @@ QList<QGraphicsItem *> QGraphicsViewPrivate::findItems(const QRegion &exposedReg
     foreach (const QRect &r, exposedRegion.rects())
         adjustedRegion += r.adjusted(-1, -1, 1, 1);
 
-    const QPainterPath exposedPath(qt_regionToPath(adjustedRegion));
-    if (scene->d_func()->largestUntransformableItem.isNull()) {
-        const QPainterPath exposedScenePath(q->mapToScene(exposedPath));
-        return scene->d_func()->items_helper(exposedScenePath,
-                                             Qt::IntersectsItemBoundingRect,
-                                             Qt::DescendingOrder);
-    }
-
-    // NB! Path must be in viewport coordinates.
-    return itemsInArea(exposedPath, Qt::IntersectsItemBoundingRect, Qt::DescendingOrder);
+    const QPainterPath exposedScenePath(q->mapToScene(qt_regionToPath(adjustedRegion)));
+    return scene->items(exposedScenePath, Qt::IntersectsItemBoundingRect,
+                        Qt::DescendingOrder, viewTransform);
 }
 
 /*!
@@ -1915,7 +1899,12 @@ void QGraphicsView::fitInView(const QRectF &rect, Qt::AspectRatioMode aspectRati
 void QGraphicsView::fitInView(const QGraphicsItem *item, Qt::AspectRatioMode aspectRatioMode)
 {
     QPainterPath path = item->isClipped() ? item->clipPath() : item->shape();
-    fitInView(item->sceneTransform().map(path).boundingRect(), aspectRatioMode);
+    if (item->d_ptr->hasTranslateOnlySceneTransform()) {
+        path.translate(item->d_ptr->sceneTransform.dx(), item->d_ptr->sceneTransform.dy());
+        fitInView(path.boundingRect(), aspectRatioMode);
+    } else {
+        fitInView(item->d_ptr->sceneTransform.map(path).boundingRect(), aspectRatioMode);
+    }
 }
 
 /*!
@@ -1941,6 +1930,8 @@ void QGraphicsView::fitInView(const QGraphicsItem *item, Qt::AspectRatioMode asp
 void QGraphicsView::render(QPainter *painter, const QRectF &target, const QRect &source,
                            Qt::AspectRatioMode aspectRatioMode)
 {
+    // ### Switch to using the recursive rendering algorithm instead.
+
     Q_D(QGraphicsView);
     if (!d->scene || !(painter && painter->isActive()))
         return;
@@ -2037,69 +2028,6 @@ QList<QGraphicsItem *> QGraphicsView::items() const
 }
 
 /*!
-    Returns all items in the area \a path, which is in viewport coordinates,
-    also taking untransformable items into consideration. This function is
-    considerably slower than just checking the scene directly. There is
-    certainly room for improvement.
-*/
-QList<QGraphicsItem *> QGraphicsViewPrivate::itemsInArea(const QPainterPath &path,
-                                                         Qt::ItemSelectionMode mode,
-                                                         Qt::SortOrder order) const
-{
-    Q_Q(const QGraphicsView);
-
-    // Determine the size of the largest untransformable subtree of children
-    // mapped to scene coordinates.
-    QRectF untr = scene->d_func()->largestUntransformableItem;
-    QRectF ltri = matrix.inverted().mapRect(untr);
-    ltri.adjust(-untr.width(), -untr.height(), untr.width(), untr.height());
-
-    QRectF rect = path.controlPointRect();
-
-    // Find all possible items in the relevant area.
-    // ### Improve this algorithm; it might be searching a too large area.
-    QRectF adjustedRect = q->mapToScene(rect.adjusted(-1, -1, 1, 1).toRect()).boundingRect();
-    adjustedRect.adjust(-ltri.width(), -ltri.height(), ltri.width(), ltri.height());
-
-    // First build a (potentially large) list of all items in the vicinity
-    // that might be untransformable.
-    QList<QGraphicsItem *> allCandidates = scene->d_func()->estimateItemsInRect(adjustedRect);
-
-    // Then find the minimal list of items that are inside \a path, and
-    // convert it to a set.
-    QList<QGraphicsItem *> regularCandidates = scene->items(q->mapToScene(path), mode);
-    QSet<QGraphicsItem *> candSet = QSet<QGraphicsItem *>::fromList(regularCandidates);
-
-    QTransform viewMatrix = q->viewportTransform();
-
-    QList<QGraphicsItem *> result;
-
-    // Run through all candidates and keep all items that are in candSet, or
-    // are untransformable and collide with \a path. ### We can improve this
-    // algorithm.
-    QList<QGraphicsItem *>::Iterator it = allCandidates.begin();
-    while (it != allCandidates.end()) {
-        QGraphicsItem *item = *it;
-        if (item->d_ptr->itemIsUntransformable()) {
-            // Check if this untransformable item collides with the
-            // original selection rect.
-            QTransform itemTransform = item->deviceTransform(viewMatrix);
-            if (QGraphicsScenePrivate::itemCollidesWithPath(item, itemTransform.inverted().map(path), mode))
-                result << item;
-        } else {
-            if (candSet.contains(item))
-                result << item;
-        }
-        ++it;
-    }
-
-    // ### Insertion sort would be faster.
-    if (order != Qt::SortOrder(-1))
-        QGraphicsScenePrivate::sortItems(&result, order, scene->d_func()->sortCacheEnabled);
-    return result;
-}
-
-/*!
     Returns a list of all the items at the position \a pos in the view. The
     items are listed in descending Z order (i.e., the first item in the list
     is the top-most item, and the last item is the bottom-most item). \a pos
@@ -2118,17 +2046,22 @@ QList<QGraphicsItem *> QGraphicsView::items(const QPoint &pos) const
     Q_D(const QGraphicsView);
     if (!d->scene)
         return QList<QGraphicsItem *>();
-    if (d->scene->d_func()->largestUntransformableItem.isNull()) {
-        if ((d->identityMatrix || d->matrix.type() <= QTransform::TxScale)) {
-            QTransform xinv = viewportTransform().inverted();
-            return d->scene->items(xinv.mapRect(QRectF(pos.x(), pos.y(), 1, 1)));
-        }
-        return d->scene->items(mapToScene(pos.x(), pos.y(), 1, 1));
+    // ### Unify these two, and use the items(QPointF) version in
+    // QGraphicsScene instead. The scene items function could use the viewport
+    // transform to map the point to a rect/polygon.
+    if ((d->identityMatrix || d->matrix.type() <= QTransform::TxScale)) {
+        // Use the rect version
+        QTransform xinv = viewportTransform().inverted();
+        return d->scene->items(xinv.mapRect(QRectF(pos.x(), pos.y(), 1, 1)),
+                               Qt::IntersectsItemShape,
+                               Qt::AscendingOrder,
+                               viewportTransform());
     }
-
-    QPainterPath path;
-    path.addRect(QRectF(pos.x(), pos.y(), 1, 1));
-    return d->itemsInArea(path);
+    // Use the polygon version
+    return d->scene->items(mapToScene(pos.x(), pos.y(), 1, 1),
+                           Qt::IntersectsItemShape,
+                           Qt::AscendingOrder,
+                           viewportTransform());
 }
 
 /*!
@@ -2155,12 +2088,7 @@ QList<QGraphicsItem *> QGraphicsView::items(const QRect &rect, Qt::ItemSelection
     Q_D(const QGraphicsView);
     if (!d->scene)
         return QList<QGraphicsItem *>();
-    if (d->scene->d_func()->largestUntransformableItem.isNull())
-        return d->scene->items(mapToScene(rect), mode);
-
-    QPainterPath path;
-    path.addRect(rect);
-    return d->itemsInArea(path);
+    return d->scene->items(mapToScene(rect), mode, Qt::AscendingOrder, viewportTransform());
 }
 
 /*!
@@ -2188,13 +2116,7 @@ QList<QGraphicsItem *> QGraphicsView::items(const QPolygon &polygon, Qt::ItemSel
     Q_D(const QGraphicsView);
     if (!d->scene)
         return QList<QGraphicsItem *>();
-    if (d->scene->d_func()->largestUntransformableItem.isNull())
-        return d->scene->items(mapToScene(polygon), mode);
-
-    QPainterPath path;
-    path.addPolygon(polygon);
-    path.closeSubpath();
-    return d->itemsInArea(path);
+    return d->scene->items(mapToScene(polygon), mode, Qt::AscendingOrder, viewportTransform());
 }
 
 /*!
@@ -2214,9 +2136,7 @@ QList<QGraphicsItem *> QGraphicsView::items(const QPainterPath &path, Qt::ItemSe
     Q_D(const QGraphicsView);
     if (!d->scene)
         return QList<QGraphicsItem *>();
-    if (d->scene->d_func()->largestUntransformableItem.isNull())
-        return d->scene->items(mapToScene(path), mode);
-    return d->itemsInArea(path);
+    return d->scene->items(mapToScene(path), mode, Qt::AscendingOrder, viewportTransform());
 }
 
 /*!
@@ -3169,7 +3089,8 @@ void QGraphicsView::mouseMoveEvent(QMouseEvent *event)
             selectionArea.addPolygon(mapToScene(d->rubberBandRect));
             selectionArea.closeSubpath();
             if (d->scene)
-                d->scene->setSelectionArea(selectionArea, d->rubberBandSelectionMode);
+                d->scene->setSelectionArea(selectionArea, d->rubberBandSelectionMode,
+                                           viewportTransform());
             return;
         }
     } else
@@ -3382,8 +3303,7 @@ void QGraphicsView::paintEvent(QPaintEvent *event)
     } else {
         // Find all exposed items
         bool allItems = false;
-        QList<QGraphicsItem *> itemList = d->findItems(d->exposedRegion, &allItems);
-
+        QList<QGraphicsItem *> itemList = d->findItems(d->exposedRegion, &allItems, viewTransform);
         if (!itemList.isEmpty()) {
             // Generate the style options.
             const int numItems = itemList.size();
diff --git a/src/gui/graphicsview/qgraphicsview_p.h b/src/gui/graphicsview/qgraphicsview_p.h
index 09d842d..0fa8b34 100644
--- a/src/gui/graphicsview/qgraphicsview_p.h
+++ b/src/gui/graphicsview/qgraphicsview_p.h
@@ -59,11 +59,12 @@
 
 #include <QtGui/qevent.h>
 #include "qgraphicssceneevent.h"
+#include <QtGui/qstyleoption.h>
 #include <private/qabstractscrollarea_p.h>
 
 QT_BEGIN_NAMESPACE
 
-class QGraphicsViewPrivate : public QAbstractScrollAreaPrivate
+class Q_AUTOTEST_EXPORT QGraphicsViewPrivate : public QAbstractScrollAreaPrivate
 {
     Q_DECLARE_PUBLIC(QGraphicsView)
 public:
@@ -84,10 +85,6 @@ public:
     qint64 horizontalScroll() const;
     qint64 verticalScroll() const;
 
-    QList<QGraphicsItem *> itemsInArea(const QPainterPath &path,
-                                       Qt::ItemSelectionMode mode = Qt::IntersectsItemShape,
-                                       Qt::SortOrder = Qt::AscendingOrder) const;
-
     QPointF mousePressItemPoint;
     QPointF mousePressScenePoint;
     QPoint mousePressViewPoint;
@@ -176,7 +173,8 @@ public:
     bool updateSceneSlotReimplementedChecked;
     QRegion exposedRegion;
 
-    QList<QGraphicsItem *> findItems(const QRegion &exposedRegion, bool *allItems) const;
+    QList<QGraphicsItem *> findItems(const QRegion &exposedRegion, bool *allItems,
+                                     const QTransform &viewTransform) const;
 
     QPointF mapToScene(const QPointF &point) const;
     QRectF mapToScene(const QRectF &rect) const;
diff --git a/src/gui/itemviews/qabstractitemview.cpp b/src/gui/itemviews/qabstractitemview.cpp
index dd84304..a4a69c3 100644
--- a/src/gui/itemviews/qabstractitemview.cpp
+++ b/src/gui/itemviews/qabstractitemview.cpp
@@ -3881,30 +3881,48 @@ bool QAbstractItemViewPrivate::openEditor(const QModelIndex &index, QEvent *even
     return true;
 }
 
-QPixmap QAbstractItemViewPrivate::renderToPixmap(const QModelIndexList &indexes, QRect *r) const
+/*
+  \internal
+
+  returns the pair QRect/QModelIndex that should be painted on the viewports's rect
+  */
+
+QItemViewPaintPairs QAbstractItemViewPrivate::draggablePaintPairs(const QModelIndexList &indexes, QRect *r) const
 {
+    Q_ASSERT(r);
     Q_Q(const QAbstractItemView);
-    QRect rect = q->visualRect(indexes.at(0));
-    QList<QRect> rects;
+    QRect &rect = *r;
+    const QRect viewportRect = viewport->rect();
+    QItemViewPaintPairs ret;
     for (int i = 0; i < indexes.count(); ++i) {
-        rects.append(q->visualRect(indexes.at(i)));
-        rect |= rects.at(i);
+        const QModelIndex &index = indexes.at(i);
+        const QRect current = q->visualRect(index);
+        if (current.intersects(viewportRect)) {
+            ret += qMakePair(current, index);
+            rect |= current;
+        }
     }
-    rect = rect.intersected(viewport->rect());
-    if (rect.width() <= 0 || rect.height() <= 0)
+    rect &= viewportRect;
+    return ret;
+}
+
+QPixmap QAbstractItemViewPrivate::renderToPixmap(const QModelIndexList &indexes, QRect *r) const
+{
+    Q_ASSERT(r);
+    QItemViewPaintPairs paintPairs = draggablePaintPairs(indexes, r);
+    if (paintPairs.isEmpty())
         return QPixmap();
-    QImage image(rect.size(), QImage::Format_ARGB32_Premultiplied);
-    image.fill(0);
-    QPainter painter(&image);
+    QPixmap pixmap(r->size());
+    pixmap.fill(Qt::transparent);
+    QPainter painter(&pixmap);
     QStyleOptionViewItemV4 option = viewOptionsV4();
     option.state |= QStyle::State_Selected;
-    for (int j = 0; j < indexes.count(); ++j) {
-        option.rect = QRect(rects.at(j).topLeft() - rect.topLeft(), rects.at(j).size());
-        delegateForIndex(indexes.at(j))->paint(&painter, option, indexes.at(j));
+    for (int j = 0; j < paintPairs.count(); ++j) {
+        option.rect = paintPairs.at(j).first.translated(r->topLeft());
+        const QModelIndex &current = paintPairs.at(j).second;
+        delegateForIndex(current)->paint(&painter, option, current);
     }
-    painter.end();
-    if (r) *r = rect;
-    return QPixmap::fromImage(image);
+    return pixmap;
 }
 
 void QAbstractItemViewPrivate::selectAll(QItemSelectionModel::SelectionFlags command)
diff --git a/src/gui/itemviews/qabstractitemview_p.h b/src/gui/itemviews/qabstractitemview_p.h
index 2950bcd..557e98b 100644
--- a/src/gui/itemviews/qabstractitemview_p.h
+++ b/src/gui/itemviews/qabstractitemview_p.h
@@ -61,11 +61,10 @@
 #include "QtGui/qmime.h"
 #include "QtGui/qpainter.h"
 #include "QtCore/qpair.h"
-#include "QtCore/qtimer.h"
-#include "QtCore/qtimeline.h"
 #include "QtGui/qregion.h"
 #include "QtCore/qdebug.h"
 #include "QtGui/qpainter.h"
+#include "QtCore/qbasictimer.h"
 
 #ifndef QT_NO_ITEMVIEWS
 
@@ -87,6 +86,9 @@ struct QEditorInfo
 
 };
 
+typedef QPair<QRect, QModelIndex> QItemViewPaintPair;
+typedef QList<QItemViewPaintPair> QItemViewPaintPairs;
+
 class QEmptyModel : public QAbstractItemModel
 {
 public:
@@ -177,7 +179,9 @@ public:
             q_func()->style()->drawPrimitive(QStyle::PE_IndicatorItemViewItemDrop, &opt, painter, q_func());
         }
     }
+
 #endif
+    virtual QItemViewPaintPairs draggablePaintPairs(const QModelIndexList &indexes, QRect *r) const;
 
     inline void releaseEditor(QWidget *editor) const {
         if (editor) {
@@ -222,7 +226,7 @@ public:
     void clearOrRemove();
     void checkPersistentEditorFocus();
 
-    QPixmap renderToPixmap(const QModelIndexList &indexes, QRect *r = 0) const;
+    QPixmap renderToPixmap(const QModelIndexList &indexes, QRect *r) const;
 
     inline QPoint offset() const {
         const Q_Q(QAbstractItemView);
@@ -376,7 +380,6 @@ public:
     QBasicTimer updateTimer;
     QBasicTimer delayedEditing;
     QBasicTimer delayedAutoScroll; //used when an item is clicked
-    QTimeLine timeline;
 
     QAbstractItemView::ScrollMode verticalScrollMode;
     QAbstractItemView::ScrollMode horizontalScrollMode;
diff --git a/src/gui/itemviews/qitemselectionmodel.cpp b/src/gui/itemviews/qitemselectionmodel.cpp
index e4cb0f0..87825d9 100644
--- a/src/gui/itemviews/qitemselectionmodel.cpp
+++ b/src/gui/itemviews/qitemselectionmodel.cpp
@@ -270,24 +270,35 @@ QItemSelectionRange QItemSelectionRange::intersect(const QItemSelectionRange &ot
 
 */
 
-/*!
-    Returns the list of model index items stored in the selection.
-*/
+/*
+  \internal
 
-QModelIndexList QItemSelectionRange::indexes() const
+  utility function for getting the indexes from a range
+  it avoid concatenating list and works on one
+ */
+
+static void indexesFromRange(const QItemSelectionRange &range, QModelIndexList &result)
 {
-    QModelIndex index;
-    QModelIndexList result;
-    if (isValid() && model()) {
-        for (int column = left(); column <= right(); ++column) {
-            for (int row = top(); row <= bottom(); ++row) {
-                index = model()->index(row, column, parent());
-                Qt::ItemFlags flags = model()->flags(index);
+    if (range.isValid() && range.model()) {
+        for (int column = range.left(); column <= range.right(); ++column) {
+            for (int row = range.top(); row <= range.bottom(); ++row) {
+                QModelIndex index = range.model()->index(row, column, range.parent());
+                Qt::ItemFlags flags = range.model()->flags(index);
                 if ((flags & Qt::ItemIsSelectable) && (flags & Qt::ItemIsEnabled))
                     result.append(index);
             }
         }
     }
+}
+
+/*!
+    Returns the list of model index items stored in the selection.
+*/
+
+QModelIndexList QItemSelectionRange::indexes() const
+{
+    QModelIndexList result;
+    indexesFromRange(*this, result);
     return result;
 }
 
@@ -404,7 +415,7 @@ QModelIndexList QItemSelection::indexes() const
     QModelIndexList result;
     QList<QItemSelectionRange>::const_iterator it = begin();
     for (; it != end(); ++it)
-        result += (*it).indexes();
+        indexesFromRange(*it, result);
     return result;
 }
 
diff --git a/src/gui/itemviews/qlistview.cpp b/src/gui/itemviews/qlistview.cpp
index 4652b91..9a94b31 100644
--- a/src/gui/itemviews/qlistview.cpp
+++ b/src/gui/itemviews/qlistview.cpp
@@ -709,6 +709,32 @@ void QListViewPrivate::selectAll(QItemSelectionModel::SelectionFlags command)
         selectionModel->select(selection, command);
 }
 
+/*!
+  \reimp
+
+  We have a QListView way of knowing what elements are on the viewport
+  through the intersectingSet function
+*/
+QItemViewPaintPairs QListViewPrivate::draggablePaintPairs(const QModelIndexList &indexes, QRect *r) const
+{
+    Q_ASSERT(r);
+    Q_Q(const QListView);
+    QRect &rect = *r;
+    const QRect viewportRect = viewport->rect();
+    QItemViewPaintPairs ret;
+    intersectingSet(viewportRect);
+    const QSet<QModelIndex> visibleIndexes = intersectingSet(viewportRect).toList().toSet();
+    for (int i = 0; i < indexes.count(); ++i) {
+        const QModelIndex &index = indexes.at(i);
+        if (visibleIndexes.contains(index)) {
+            const QRect current = q->visualRect(index);
+            ret += qMakePair(current, index);
+            rect |= current;
+        }
+    }
+    rect &= viewportRect;
+    return ret;
+}
 
 /*!
   \internal
@@ -925,9 +951,9 @@ void QListView::dragMoveEvent(QDragMoveEvent *e)
             QModelIndex index;
             if (d->movement == Snap) {
                 QRect rect(d->dynamicListView->snapToGrid(e->pos() + d->offset()), d->gridSize());
-                d->intersectingSet(rect);
-                index = d->intersectVector.count() > 0
-                                    ? d->intersectVector.last() : QModelIndex();
+                const QVector<QModelIndex> intersectVector = d->intersectingSet(rect);
+                index = intersectVector.count() > 0
+                                    ? intersectVector.last() : QModelIndex();
             } else {
                 index = indexAt(e->pos());
             }
@@ -1100,10 +1126,8 @@ void QListView::paintEvent(QPaintEvent *e)
         return;
     QStyleOptionViewItemV4 option = d->viewOptionsV4();
     QPainter painter(d->viewport);
-    QRect area = e->rect();
 
-    d->intersectingSet(e->rect().translated(horizontalOffset(), verticalOffset()), false);
-    const QVector<QModelIndex> toBeRendered = d->intersectVector;
+    const QVector<QModelIndex> toBeRendered = d->intersectingSet(e->rect().translated(horizontalOffset(), verticalOffset()), false);
 
     const QModelIndex current = currentIndex();
     const QModelIndex hover = d->hover;
@@ -1225,9 +1249,9 @@ QModelIndex QListView::indexAt(const QPoint &p) const
 {
     Q_D(const QListView);
     QRect rect(p.x() + horizontalOffset(), p.y() + verticalOffset(), 1, 1);
-    d->intersectingSet(rect);
-    QModelIndex index = d->intersectVector.count() > 0
-                        ? d->intersectVector.last() : QModelIndex();
+    const QVector<QModelIndex> intersectVector = d->intersectingSet(rect);
+    QModelIndex index = intersectVector.count() > 0
+                        ? intersectVector.last() : QModelIndex();
     if (index.isValid() && visualRect(index).contains(p))
         return index;
     return QModelIndex();
@@ -1325,38 +1349,38 @@ QModelIndex QListView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifie
     if (d->gridSize().isValid()) rect.setSize(d->gridSize());
 
     QSize contents = d->contentsSize();
-    d->intersectVector.clear();
+    QVector<QModelIndex> intersectVector;
 
     switch (cursorAction) {
     case MoveLeft:
-        while (d->intersectVector.isEmpty()) {
+        while (intersectVector.isEmpty()) {
             rect.translate(-rect.width(), 0);
             if (rect.right() <= 0)
                 return current;
             if (rect.left() < 0)
                 rect.setLeft(0);
-            d->intersectingSet(rect);
-            d->removeCurrentAndDisabled(&d->intersectVector, current);
+            intersectVector = d->intersectingSet(rect);
+            d->removeCurrentAndDisabled(&intersectVector, current);
         }
-        return d->closestIndex(initialRect, d->intersectVector);
+        return d->closestIndex(initialRect, intersectVector);
     case MoveRight:
-        while (d->intersectVector.isEmpty()) {
+        while (intersectVector.isEmpty()) {
             rect.translate(rect.width(), 0);
             if (rect.left() >= contents.width())
                 return current;
             if (rect.right() > contents.width())
                 rect.setRight(contents.width());
-            d->intersectingSet(rect);
-            d->removeCurrentAndDisabled(&d->intersectVector, current);
+            intersectVector = d->intersectingSet(rect);
+            d->removeCurrentAndDisabled(&intersectVector, current);
         }
-        return d->closestIndex(initialRect, d->intersectVector);
+        return d->closestIndex(initialRect, intersectVector);
     case MovePageUp:
         rect.moveTop(rect.top() - d->viewport->height());
         if (rect.top() < rect.height())
             rect.moveTop(rect.height());
     case MovePrevious:
     case MoveUp:
-        while (d->intersectVector.isEmpty()) {
+        while (intersectVector.isEmpty()) {
             rect.translate(0, -rect.height());
             if (rect.bottom() <= 0) {
 #ifdef QT_KEYPAD_NAVIGATION
@@ -1372,17 +1396,17 @@ QModelIndex QListView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifie
             }
             if (rect.top() < 0)
                 rect.setTop(0);
-            d->intersectingSet(rect);
-            d->removeCurrentAndDisabled(&d->intersectVector, current);
+            intersectVector = d->intersectingSet(rect);
+            d->removeCurrentAndDisabled(&intersectVector, current);
         }
-        return d->closestIndex(initialRect, d->intersectVector);
+        return d->closestIndex(initialRect, intersectVector);
     case MovePageDown:
         rect.moveTop(rect.top() + d->viewport->height());
         if (rect.bottom() > contents.height() - rect.height())
             rect.moveBottom(contents.height() - rect.height());
     case MoveNext:
     case MoveDown:
-        while (d->intersectVector.isEmpty()) {
+        while (intersectVector.isEmpty()) {
             rect.translate(0, rect.height());
             if (rect.top() >= contents.height()) {
 #ifdef QT_KEYPAD_NAVIGATION
@@ -1399,10 +1423,10 @@ QModelIndex QListView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifie
             }
             if (rect.bottom() > contents.height())
                 rect.setBottom(contents.height());
-            d->intersectingSet(rect);
-            d->removeCurrentAndDisabled(&d->intersectVector, current);
+            intersectVector = d->intersectingSet(rect);
+            d->removeCurrentAndDisabled(&intersectVector, current);
         }
-        return d->closestIndex(initialRect, d->intersectVector);
+        return d->closestIndex(initialRect, intersectVector);
     case MoveHome:
         return d->model->index(0, d->column, d->root);
     case MoveEnd:
@@ -1477,10 +1501,10 @@ void QListView::setSelection(const QRect &rect, QItemSelectionModel::SelectionFl
     QItemSelection selection;
 
     if (rect.width() == 1 && rect.height() == 1) {
-        d->intersectingSet(rect.translated(horizontalOffset(), verticalOffset()));
+        const QVector<QModelIndex> intersectVector = d->intersectingSet(rect.translated(horizontalOffset(), verticalOffset()));
         QModelIndex tl;
-        if (!d->intersectVector.isEmpty())
-            tl = d->intersectVector.last(); // special case for mouse press; only select the top item
+        if (!intersectVector.isEmpty())
+            tl = intersectVector.last(); // special case for mouse press; only select the top item
         if (tl.isValid() && d->isIndexEnabled(tl))
             selection.select(tl, tl);
     } else {
@@ -1490,14 +1514,14 @@ void QListView::setSelection(const QRect &rect, QItemSelectionModel::SelectionFl
             QModelIndex tl, br;
             // get the first item
             const QRect topLeft(rect.left() + horizontalOffset(), rect.top() + verticalOffset(), 1, 1);
-            d->intersectingSet(topLeft);
-            if (!d->intersectVector.isEmpty())
-                tl = d->intersectVector.last();
+            QVector<QModelIndex> intersectVector = d->intersectingSet(topLeft);
+            if (!intersectVector.isEmpty())
+                tl = intersectVector.last();
             // get the last item
             const QRect bottomRight(rect.right() + horizontalOffset(), rect.bottom() + verticalOffset(), 1, 1);
-            d->intersectingSet(bottomRight);
-            if (!d->intersectVector.isEmpty())
-                br = d->intersectVector.last();
+            intersectVector = d->intersectingSet(bottomRight);
+            if (!intersectVector.isEmpty())
+                br = intersectVector.last();
 
             // get the ranges
             if (tl.isValid() && br.isValid()
@@ -1633,14 +1657,16 @@ QRegion QListView::visualRegionForSelection(const QItemSelection &selection) con
 QModelIndexList QListView::selectedIndexes() const
 {
     Q_D(const QListView);
-    QModelIndexList viewSelected;
-    QModelIndexList modelSelected;
-    if (d->selectionModel)
-        modelSelected = d->selectionModel->selectedIndexes();
-    for (int i = 0; i < modelSelected.count(); ++i) {
-        QModelIndex index = modelSelected.at(i);
+    if (!d->selectionModel)
+        return QModelIndexList();
+
+    QModelIndexList viewSelected = d->selectionModel->selectedIndexes();
+    for (int i = 0; i < viewSelected.count(); ++i) {
+        const QModelIndex &index = viewSelected.at(i);
         if (!isIndexHidden(index) && index.parent() == d->root && index.column() == d->column)
-            viewSelected.append(index);
+            ++i;
+        else
+            viewSelected.removeAt(i);
     }
     return viewSelected;
 }
@@ -2116,8 +2142,8 @@ QItemSelection QListViewPrivate::selection(const QRect &rect) const
 {
     QItemSelection selection;
     QModelIndex tl, br;
-    intersectingSet(rect);
-    QVector<QModelIndex>::iterator it = intersectVector.begin();
+    const QVector<QModelIndex> intersectVector = intersectingSet(rect);
+    QVector<QModelIndex>::const_iterator it = intersectVector.begin();
     for (; it != intersectVector.end(); ++it) {
         if (!tl.isValid() && !br.isValid()) {
             tl = br = *it;
@@ -2408,9 +2434,9 @@ void QStaticListViewBase::doStaticLayout(const QListViewLayoutInfo &info)
   Finds the set of items intersecting with \a area.
   In this function, itemsize is counted from topleft to the start of the next item.
 */
-void QStaticListViewBase::intersectingStaticSet(const QRect &area) const
+QVector<QModelIndex> QStaticListViewBase::intersectingStaticSet(const QRect &area) const
 {
-    clearIntersections();
+    QVector<QModelIndex> ret;
     int segStartPosition;
     int segEndPosition;
     int flowStartPosition;
@@ -2427,7 +2453,7 @@ void QStaticListViewBase::intersectingStaticSet(const QRect &area) const
         flowEndPosition = area.bottom();
     }
     if (segmentPositions.count() < 2 || flowPositions.isEmpty())
-        return;
+        return ret;
     // the last segment position is actually the edge of the last segment
     const int segLast = segmentPositions.count() - 2;
     int seg = qBinarySearch<int>(segmentPositions, segStartPosition, 0, segLast + 1);
@@ -2442,13 +2468,14 @@ void QStaticListViewBase::intersectingStaticSet(const QRect &area) const
                 continue;
             QModelIndex index = modelIndex(row);
             if (index.isValid())
-                appendToIntersections(index);
+                ret += index;
 #if 0 // for debugging
             else
                 qWarning("intersectingStaticSet: row %d was invalid", row);
 #endif
         }
     }
+    return ret;
 }
 
 int QStaticListViewBase::itemIndex(const QListViewItem &item) const
@@ -2769,12 +2796,15 @@ void QDynamicListViewBase::doDynamicLayout(const QListViewLayoutInfo &info)
         viewport()->update();
 }
 
-void QDynamicListViewBase::intersectingDynamicSet(const QRect &area) const
+QVector<QModelIndex> QDynamicListViewBase::intersectingDynamicSet(const QRect &area) const
 {
-    clearIntersections();
-    QListViewPrivate *that = const_cast<QListViewPrivate*>(dd);
+    QDynamicListViewBase *that = const_cast<QDynamicListViewBase*>(this);
     QBspTree::Data data(static_cast<void*>(that));
-    that->dynamicListView->tree.climbTree(area, &QDynamicListViewBase::addLeaf, data);
+    QVector<QModelIndex> res;
+    that->interSectingVector = &res;
+    that->tree.climbTree(area, &QDynamicListViewBase::addLeaf, data);
+    that->interSectingVector = 0;
+    return res;
 }
 
 void QDynamicListViewBase::createItems(int to)
@@ -2851,20 +2881,20 @@ int QDynamicListViewBase::itemIndex(const QListViewItem &item) const
 }
 
 void QDynamicListViewBase::addLeaf(QVector<int> &leaf, const QRect &area,
-                               uint visited, QBspTree::Data data)
+                                   uint visited, QBspTree::Data data)
 {
     QListViewItem *vi;
-    QListViewPrivate *_this = static_cast<QListViewPrivate *>(data.ptr);
+    QDynamicListViewBase *_this = static_cast<QDynamicListViewBase *>(data.ptr);
     for (int i = 0; i < leaf.count(); ++i) {
         int idx = leaf.at(i);
-        if (idx < 0 || idx >= _this->dynamicListView->items.count())
+        if (idx < 0 || idx >= _this->items.count())
             continue;
-        vi = &_this->dynamicListView->items[idx];
+        vi = &_this->items[idx];
         Q_ASSERT(vi);
         if (vi->isValid() && vi->rect().intersects(area) && vi->visited != visited) {
-            QModelIndex index = _this->listViewItemToIndex(*vi);
+            QModelIndex index  = _this->dd->listViewItemToIndex(*vi);
             Q_ASSERT(index.isValid());
-            _this->intersectVector.append(index);
+            _this->interSectingVector->append(index);
             vi->visited = visited;
         }
     }
diff --git a/src/gui/itemviews/qlistview_p.h b/src/gui/itemviews/qlistview_p.h
index a7a7000..1727ba4 100644
--- a/src/gui/itemviews/qlistview_p.h
+++ b/src/gui/itemviews/qlistview_p.h
@@ -153,9 +153,6 @@ public:
     inline bool isHidden(int row) const;
     inline int hiddenCount() const;
 
-    inline void clearIntersections() const;
-    inline void appendToIntersections(const QModelIndex &idx) const;
-
     inline bool isRightToLeft() const;
 
     QListViewPrivate *dd;
@@ -186,7 +183,7 @@ public:
 
     QPoint initStaticLayout(const QListViewLayoutInfo &info);
     void doStaticLayout(const QListViewLayoutInfo &info);
-    void intersectingStaticSet(const QRect &area) const;
+    QVector<QModelIndex> intersectingStaticSet(const QRect &area) const;
 
     int itemIndex(const QListViewItem &item) const;
 
@@ -216,7 +213,7 @@ class QDynamicListViewBase : public QCommonListViewBase
     friend class QListViewPrivate;
 public:
     QDynamicListViewBase(QListView *q, QListViewPrivate *d) : QCommonListViewBase(q, d),
-        batchStartRow(0), batchSavedDeltaSeg(0) {}
+        batchStartRow(0), batchSavedDeltaSeg(0), interSectingVector(0) {}
 
     QBspTree tree;
     QVector<QListViewItem> items;
@@ -230,6 +227,7 @@ public:
     // used when laying out in batches
     int batchStartRow;
     int batchSavedDeltaSeg;
+    QVector<QModelIndex> *interSectingVector; //used from within intersectingDynamicSet
 
     void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);
     bool doBatchedItemLayout(const QListViewLayoutInfo &info, int max);
@@ -237,7 +235,7 @@ public:
     void initBspTree(const QSize &contents);
     QPoint initDynamicLayout(const QListViewLayoutInfo &info);
     void doDynamicLayout(const QListViewLayoutInfo &info);
-    void intersectingDynamicSet(const QRect &area) const;
+    QVector<QModelIndex> intersectingDynamicSet(const QRect &area) const;
 
     static void addLeaf(QVector<int> &leaf, const QRect &area,
                         uint visited, QBspTree::Data data);
@@ -277,11 +275,11 @@ public:
 
     bool doItemsLayout(int num);
 
-    inline void intersectingSet(const QRect &area, bool doLayout = true) const {
+    inline QVector<QModelIndex> intersectingSet(const QRect &area, bool doLayout = true) const {
         if (doLayout) executePostedLayout();
         QRect a = (q_func()->isRightToLeft() ? flipX(area.normalized()) : area.normalized());
-        if (viewMode == QListView::ListMode) staticListView->intersectingStaticSet(a);
-        else dynamicListView->intersectingDynamicSet(a);
+        return (viewMode == QListView::ListMode)  ? staticListView->intersectingStaticSet(a)
+            : dynamicListView->intersectingDynamicSet(a);
     }
 
     // ### FIXME:
@@ -351,6 +349,8 @@ public:
 
     void scrollElasticBandBy(int dx, int dy);
 
+    QItemViewPaintPairs draggablePaintPairs(const QModelIndexList &indexes, QRect *r) const;
+
     // ### FIXME: we only need one at a time
     QDynamicListViewBase *dynamicListView;
     QStaticListViewBase *staticListView;
@@ -383,9 +383,6 @@ public:
 
     QRect layoutBounds;
 
-    // used for intersecting set
-    mutable QVector<QModelIndex> intersectVector;
-
     // timers
     QBasicTimer batchLayoutTimer;
 
@@ -438,9 +435,6 @@ inline QAbstractItemDelegate *QCommonListViewBase::delegate(const QModelIndex &i
 inline bool QCommonListViewBase::isHidden(int row) const { return dd->isHidden(row); }
 inline int QCommonListViewBase::hiddenCount() const { return dd->hiddenRows.count(); }
 
-inline void QCommonListViewBase::clearIntersections() const { dd->intersectVector.clear(); }
-inline void QCommonListViewBase::appendToIntersections(const QModelIndex &idx) const { dd->intersectVector.append(idx); }
-
 inline bool QCommonListViewBase::isRightToLeft() const { return qq->isRightToLeft(); }
 
 QT_END_NAMESPACE
diff --git a/src/gui/itemviews/qtableview.cpp b/src/gui/itemviews/qtableview.cpp
index c676237..2009499 100644
--- a/src/gui/itemviews/qtableview.cpp
+++ b/src/gui/itemviews/qtableview.cpp
@@ -1528,6 +1528,8 @@ void QTableView::updateGeometries()
             ++columnsInViewport;
         }
     }
+    columnsInViewport = qMax(columnsInViewport, 1); //there must be always at least 1 column
+
     if (horizontalScrollMode() == QAbstractItemView::ScrollPerItem) {
         const int visibleColumns = columnCount - d->horizontalHeader->hiddenSectionCount();
         horizontalScrollBar()->setRange(0, visibleColumns - columnsInViewport);
@@ -1554,6 +1556,8 @@ void QTableView::updateGeometries()
             ++rowsInViewport;
         }
     }
+    rowsInViewport = qMax(rowsInViewport, 1); //there must be always at least 1 row
+
     if (verticalScrollMode() == QAbstractItemView::ScrollPerItem) {
         const int visibleRows = rowCount - d->verticalHeader->hiddenSectionCount();
         verticalScrollBar()->setRange(0, visibleRows - rowsInViewport);
@@ -2036,7 +2040,7 @@ void QTableView::scrollTo(const QModelIndex &index, ScrollHint hint)
         if (positionAtRight || hint == PositionAtCenter || positionAtLeft) {
             int hiddenSections = 0;
             if (d->horizontalHeader->sectionsHidden()) {
-                for (int s = horizontalIndex; s >= 0; --s) {
+                for (int s = horizontalIndex - 1; s >= 0; --s) {
                     int column = d->horizontalHeader->logicalIndex(s);
                     if (d->horizontalHeader->isSectionHidden(column))
                         ++hiddenSections;
@@ -2091,7 +2095,7 @@ void QTableView::scrollTo(const QModelIndex &index, ScrollHint hint)
         if (hint == PositionAtBottom || hint == PositionAtCenter || hint == PositionAtTop) {
             int hiddenSections = 0;
             if (d->verticalHeader->sectionsHidden()) {
-                for (int s = verticalIndex; s >= 0; --s) {
+                for (int s = verticalIndex - 1; s >= 0; --s) {
                     int row = d->verticalHeader->logicalIndex(s);
                     if (d->verticalHeader->isSectionHidden(row))
                         ++hiddenSections;
diff --git a/src/gui/itemviews/qtreeview.cpp b/src/gui/itemviews/qtreeview.cpp
index 7c319dc..f13ff0c 100644
--- a/src/gui/itemviews/qtreeview.cpp
+++ b/src/gui/itemviews/qtreeview.cpp
@@ -262,10 +262,6 @@ void QTreeView::setSelectionModel(QItemSelectionModel *selectionModel)
     Q_D(QTreeView);
     Q_ASSERT(selectionModel);
     if (d->selectionModel) {
-        if (d->allColumnsShowFocus) {
-            QObject::disconnect(d->selectionModel, SIGNAL(currentChanged(QModelIndex,QModelIndex)),
-                                this, SLOT(_q_currentChanged(QModelIndex,QModelIndex)));
-        }
         // support row editing
         disconnect(d->selectionModel, SIGNAL(currentRowChanged(QModelIndex,QModelIndex)),
                    d->model, SLOT(submit()));
@@ -275,10 +271,6 @@ void QTreeView::setSelectionModel(QItemSelectionModel *selectionModel)
     QAbstractItemView::setSelectionModel(selectionModel);
 
     if (d->selectionModel) {
-        if (d->allColumnsShowFocus) {
-            QObject::connect(d->selectionModel, SIGNAL(currentChanged(QModelIndex,QModelIndex)),
-                             this, SLOT(_q_currentChanged(QModelIndex,QModelIndex)));
-        }
         // support row editing
         connect(d->selectionModel, SIGNAL(currentRowChanged(QModelIndex,QModelIndex)),
                 d->model, SLOT(submit()));
@@ -901,15 +893,6 @@ void QTreeView::setAllColumnsShowFocus(bool enable)
     Q_D(QTreeView);
     if (d->allColumnsShowFocus == enable)
         return;
-    if (d->selectionModel) {
-        if (enable) {
-            QObject::connect(d->selectionModel, SIGNAL(currentChanged(QModelIndex,QModelIndex)),
-                             this, SLOT(_q_currentChanged(QModelIndex,QModelIndex)));
-        } else {
-            QObject::disconnect(d->selectionModel, SIGNAL(currentChanged(QModelIndex,QModelIndex)),
-                                this, SLOT(_q_currentChanged(QModelIndex,QModelIndex)));
-        }
-    }
     d->allColumnsShowFocus = enable;
     d->viewport->update();
 }
@@ -1267,10 +1250,13 @@ void QTreeView::paintEvent(QPaintEvent *event)
     Q_D(QTreeView);
     d->executePostedLayout();
     QPainter painter(viewport());
+#ifndef QT_NO_ANIMATION
     if (d->isAnimating()) {
-        drawTree(&painter, event->region() - d->animationRect());
+        drawTree(&painter, event->region() - d->animatedOperation.rect());
         d->drawAnimatedOperation(&painter);
-    } else {
+    } else
+#endif //QT_NO_ANIMATION
+    {
         drawTree(&painter, event->region());
 #ifndef QT_NO_DRAGANDDROP
         d->paintDropIndicator(&painter);
@@ -1306,13 +1292,13 @@ bool QTreeViewPrivate::expandOrCollapseItemAtPos(const QPoint &pos)
 {
     Q_Q(QTreeView);
     // we want to handle mousePress in EditingState (persistent editors)
-    if ((q->state() != QAbstractItemView::NoState
-		&& q->state() != QAbstractItemView::EditingState)
+    if ((state != QAbstractItemView::NoState
+		&& state != QAbstractItemView::EditingState)
 		|| !viewport->rect().contains(pos))
         return true;
 
     int i = itemDecorationAt(pos);
-    if ((i != -1) && q->itemsExpandable() && hasVisibleChildren(viewItems.at(i).index)) {
+    if ((i != -1) && itemsExpandable && hasVisibleChildren(viewItems.at(i).index)) {
         if (viewItems.at(i).expanded)
             collapse(i, true);
         else
@@ -2851,10 +2837,9 @@ void QTreeViewPrivate::initialize()
     header->setStretchLastSection(true);
     header->setDefaultAlignment(Qt::AlignLeft|Qt::AlignVCenter);
     q->setHeader(header);
-
-    // animation
-    QObject::connect(&timeline, SIGNAL(frameChanged(int)), q, SLOT(_q_animate()));
-    QObject::connect(&timeline, SIGNAL(finished()), q, SLOT(_q_endAnimatedOperation()), Qt::QueuedConnection);
+#ifndef QT_NO_ANIMATION
+    QObject::connect(&animatedOperation, SIGNAL(finished()), q, SLOT(_q_endAnimatedOperation()));
+#endif //QT_NO_ANIMATION
 }
 
 void QTreeViewPrivate::expand(int item, bool emitSignal)
@@ -2864,10 +2849,11 @@ void QTreeViewPrivate::expand(int item, bool emitSignal)
     if (item == -1 || viewItems.at(item).expanded)
         return;
 
+#ifndef QT_NO_ANIMATION
     if (emitSignal && animationsEnabled)
-        prepareAnimatedOperation(item, AnimatedOperation::Expand);
-
-    QAbstractItemView::State oldState = q->state();
+        prepareAnimatedOperation(item, QVariantAnimation::Forward);
+#endif //QT_NO_ANIMATION
+    QAbstractItemView::State oldState = state;
     q->setState(QAbstractItemView::ExpandingState);
     const QModelIndex index = viewItems.at(item).index;
     storeExpanded(index);
@@ -2877,8 +2863,10 @@ void QTreeViewPrivate::expand(int item, bool emitSignal)
 
     if (emitSignal) {
         emit q->expanded(index);
+#ifndef QT_NO_ANIMATION
         if (animationsEnabled)
             beginAnimatedOperation();
+#endif //QT_NO_ANIMATION
     }
     if (model->canFetchMore(index))
         model->fetchMore(index);
@@ -2902,10 +2890,12 @@ void QTreeViewPrivate::collapse(int item, bool emitSignal)
     if (it == expandedIndexes.end() || viewItems.at(item).expanded == false)
         return; // nothing to do
 
+#ifndef QT_NO_ANIMATION
     if (emitSignal && animationsEnabled)
-        prepareAnimatedOperation(item, AnimatedOperation::Collapse);
+        prepareAnimatedOperation(item, QVariantAnimation::Backward);
+#endif //QT_NO_ANIMATION
 
-    QAbstractItemView::State oldState = q->state();
+    QAbstractItemView::State oldState = state;
     q->setState(QAbstractItemView::CollapsingState);
     expandedIndexes.erase(it);
     viewItems[item].expanded = false;
@@ -2922,29 +2912,33 @@ void QTreeViewPrivate::collapse(int item, bool emitSignal)
 
     if (emitSignal) {
         emit q->collapsed(modelIndex);
+#ifndef QT_NO_ANIMATION
         if (animationsEnabled)
             beginAnimatedOperation();
+#endif //QT_NO_ANIMATION
     }
 }
 
-void QTreeViewPrivate::prepareAnimatedOperation(int item, AnimatedOperation::Type type)
+#ifndef QT_NO_ANIMATION
+void QTreeViewPrivate::prepareAnimatedOperation(int item, QVariantAnimation::Direction direction)
 {
     animatedOperation.item = item;
-    animatedOperation.type = type;
+    animatedOperation.viewport = viewport;
+    animatedOperation.setDirection(direction);
 
     int top = coordinateForItem(item) + itemHeight(item);
     QRect rect = viewport->rect();
     rect.setTop(top);
-    if (type == AnimatedOperation::Collapse) {
+    if (direction == QVariantAnimation::Backward) {
         const int limit = rect.height() * 2;
         int h = 0;
         int c = item + viewItems.at(item).total + 1;
         for (int i = item + 1; i < c && h < limit; ++i)
             h += itemHeight(i);
         rect.setHeight(h);
-        animatedOperation.duration = h;
+        animatedOperation.setEndValue(top + h);
     }
-    animatedOperation.top = top;
+    animatedOperation.setStartValue(top);
     animatedOperation.before = renderTreeToPixmapForAnimation(rect);
 }
 
@@ -2953,50 +2947,29 @@ void QTreeViewPrivate::beginAnimatedOperation()
     Q_Q(QTreeView);
 
     QRect rect = viewport->rect();
-    rect.setTop(animatedOperation.top);
-    if (animatedOperation.type == AnimatedOperation::Expand) {
+    rect.setTop(animatedOperation.top());
+    if (animatedOperation.direction() == QVariantAnimation::Forward) {
         const int limit = rect.height() * 2;
         int h = 0;
         int c = animatedOperation.item + viewItems.at(animatedOperation.item).total + 1;
         for (int i = animatedOperation.item + 1; i < c && h < limit; ++i)
             h += itemHeight(i);
         rect.setHeight(h);
-        animatedOperation.duration = h;
+        animatedOperation.setEndValue(animatedOperation.top() + h);
     }
 
     animatedOperation.after = renderTreeToPixmapForAnimation(rect);
 
     q->setState(QAbstractItemView::AnimatingState);
-
-    timeline.stop();
-    timeline.setDuration(250);
-    timeline.setFrameRange(animatedOperation.top, animatedOperation.top + animatedOperation.duration);
-    timeline.start();
-}
-
-void QTreeViewPrivate::_q_endAnimatedOperation()
-{
-    Q_Q(QTreeView);
-    animatedOperation.before = QPixmap();
-    animatedOperation.after = QPixmap();
-    q->setState(QAbstractItemView::NoState);
-    q->updateGeometries();
-    viewport->update();
-}
-
-void QTreeViewPrivate::_q_animate()
-{
-    QRect rect = viewport->rect();
-    rect.moveTop(animatedOperation.top);
-    viewport->repaint(rect);
+    animatedOperation.start(); //let's start the animation
 }
 
 void QTreeViewPrivate::drawAnimatedOperation(QPainter *painter) const
 {
-    int start = timeline.startFrame();
-    int end = timeline.endFrame();
-    bool collapsing = animatedOperation.type == AnimatedOperation::Collapse;
-    int current = collapsing ? end - timeline.currentFrame() + start : timeline.currentFrame();
+    const int start = animatedOperation.startValue().toInt(),
+        end = animatedOperation.endValue().toInt(),
+        current = animatedOperation.currentValue().toInt();
+    bool collapsing = animatedOperation.direction() == QVariantAnimation::Backward;
     const QPixmap top = collapsing ? animatedOperation.before : animatedOperation.after;
     painter->drawPixmap(0, start, top, 0, end - current - 1, top.width(), top.height());
     const QPixmap bottom = collapsing ? animatedOperation.after : animatedOperation.before;
@@ -3039,26 +3012,14 @@ QPixmap QTreeViewPrivate::renderTreeToPixmapForAnimation(const QRect &rect) cons
     return pixmap;
 }
 
-void QTreeViewPrivate::_q_currentChanged(const QModelIndex &current, const QModelIndex &previous)
+void QTreeViewPrivate::_q_endAnimatedOperation()
 {
     Q_Q(QTreeView);
-    if (previous.isValid()) {
-        QRect previousRect = q->visualRect(previous);
-        if (allColumnsShowFocus) {
-            previousRect.setX(0);
-            previousRect.setWidth(viewport->width());
-        }
-        viewport->update(previousRect);
-    }
-    if (current.isValid()) {
-        QRect currentRect = q->visualRect(current);
-        if (allColumnsShowFocus) {
-            currentRect.setX(0);
-            currentRect.setWidth(viewport->width());
-        }
-        viewport->update(currentRect);
-    }
+    q->setState(QAbstractItemView::NoState);
+    q->updateGeometries();
+    viewport->update();
 }
+#endif //QT_NO_ANIMATION
 
 void QTreeViewPrivate::_q_modelAboutToBeReset()
 {
@@ -3787,6 +3748,21 @@ void QTreeView::currentChanged(const QModelIndex &current, const QModelIndex &pr
     }
 #endif
     QAbstractItemView::currentChanged(current, previous);
+
+    if (allColumnsShowFocus()) {
+        if (previous.isValid()) {
+            QRect previousRect = visualRect(previous);
+            previousRect.setX(0);
+            previousRect.setWidth(viewport()->width());
+            viewport()->update(previousRect);
+        }
+        if (current.isValid()) {
+            QRect currentRect = visualRect(current);
+            currentRect.setX(0);
+            currentRect.setWidth(viewport()->width());
+            viewport()->update(currentRect);
+        }
+    }
 }
 
 /*!
diff --git a/src/gui/itemviews/qtreeview.h b/src/gui/itemviews/qtreeview.h
index 0347645..4411781 100644
--- a/src/gui/itemviews/qtreeview.h
+++ b/src/gui/itemviews/qtreeview.h
@@ -223,12 +223,11 @@ private:
 
     Q_DECLARE_PRIVATE(QTreeView)
     Q_DISABLE_COPY(QTreeView)
+#ifndef QT_NO_ANIMATION
     Q_PRIVATE_SLOT(d_func(), void _q_endAnimatedOperation())
-    Q_PRIVATE_SLOT(d_func(), void _q_animate())
-    Q_PRIVATE_SLOT(d_func(), void _q_currentChanged(const QModelIndex&, const QModelIndex &))
+#endif //QT_NO_ANIMATION
     Q_PRIVATE_SLOT(d_func(), void _q_modelAboutToBeReset())
     Q_PRIVATE_SLOT(d_func(), void _q_sortIndicatorChanged(int column, Qt::SortOrder order))
-    Q_PRIVATE_SLOT(d_func(), void _q_modelDestroyed())
 };
 
 #endif // QT_NO_TREEVIEW
diff --git a/src/gui/itemviews/qtreeview_p.h b/src/gui/itemviews/qtreeview_p.h
index 6a1dfe5..6fb2e41 100644
--- a/src/gui/itemviews/qtreeview_p.h
+++ b/src/gui/itemviews/qtreeview_p.h
@@ -54,6 +54,7 @@
 //
 
 #include "private/qabstractitemview_p.h"
+#include <QtCore/qvariantanimation.h>
 
 #ifndef QT_NO_TREEVIEW
 
@@ -81,42 +82,39 @@ public:
           uniformRowHeights(false), rootDecoration(true),
           itemsExpandable(true), sortingEnabled(false),
           expandsOnDoubleClick(true),
-          allColumnsShowFocus(false),
+          allColumnsShowFocus(false), current(0),
           animationsEnabled(false), columnResizeTimerID(0),
           autoExpandDelay(-1), hoverBranch(-1), geometryRecursionBlock(false) {}
 
     ~QTreeViewPrivate() {}
     void initialize();
 
-    struct AnimatedOperation
+#ifndef QT_NO_ANIMATION
+    struct AnimatedOperation : public QVariantAnimation
     {
-        enum Type { Expand, Collapse };
         int item;
-        int top;
-        int duration;
-        Type type;
         QPixmap before;
         QPixmap after;
-    };
-
-    void expand(int item, bool emitSignal);
-    void collapse(int item, bool emitSignal);
-
-    void prepareAnimatedOperation(int item, AnimatedOperation::Type type);
+        QWidget *viewport;
+        AnimatedOperation() : item(0) { setEasingCurve(QEasingCurve::InOutQuad); }
+        int top() const { return startValue().toInt(); }
+        QRect rect() const { QRect rect = viewport->rect(); rect.moveTop(top()); return rect; }
+        void updateCurrentValue(const QVariant &) { viewport->update(rect()); }
+        void updateState(State, State state) { if (state == Stopped) before = after = QPixmap(); }
+    } animatedOperation;
+    void prepareAnimatedOperation(int item, QVariantAnimation::Direction d);
     void beginAnimatedOperation();
-    void _q_endAnimatedOperation();
     void drawAnimatedOperation(QPainter *painter) const;
     QPixmap renderTreeToPixmapForAnimation(const QRect &rect) const;
+    void _q_endAnimatedOperation();
+#endif //QT_NO_ANIMATION
 
-    inline QRect animationRect() const
-        { return QRect(0, animatedOperation.top, viewport->width(),
-                       viewport->height() - animatedOperation.top); }
+    void expand(int item, bool emitSignal);
+    void collapse(int item, bool emitSignal);
 
-    void _q_currentChanged(const QModelIndex&, const QModelIndex&);
     void _q_columnsAboutToBeRemoved(const QModelIndex &, int, int);
     void _q_columnsRemoved(const QModelIndex &, int, int);
     void _q_modelAboutToBeReset();
-    void _q_animate();
     void _q_sortIndicatorChanged(int column, Qt::SortOrder order);
     void _q_modelDestroyed();
 
@@ -177,8 +175,6 @@ public:
 
     // used when expanding and collapsing items
     QSet<QPersistentModelIndex> expandedIndexes;
-    QStack<bool> expandParent;
-    AnimatedOperation animatedOperation;
     bool animationsEnabled;
 
     inline bool storeExpanded(const QPersistentModelIndex &idx) {
diff --git a/src/gui/kernel/qapplication.cpp b/src/gui/kernel/qapplication.cpp
index 839e465..b168188 100644
--- a/src/gui/kernel/qapplication.cpp
+++ b/src/gui/kernel/qapplication.cpp
@@ -126,7 +126,7 @@ int QApplicationPrivate::app_compile_version = 0x040000; //we don't know exactly
 QApplication::Type qt_appType=QApplication::Tty;
 QApplicationPrivate *QApplicationPrivate::self = 0;
 
-QInputContext *QApplicationPrivate::inputContext;
+QInputContext *QApplicationPrivate::inputContext = 0;
 
 bool QApplicationPrivate::quitOnLastWindowClosed = true;
 
@@ -3716,6 +3716,13 @@ bool QApplication::notify(QObject *receiver, QEvent *e)
                                                                          Qt::MouseFocusReason);
                 }
 
+                // ### Qt 5 These dynamic tool tips should be an OPT-IN feature. Some platforms
+                // like Mac OS X (probably others too), can optimize their views by not
+                // dispatching mouse move events. We have attributes to control hover,
+                // and mouse tracking, but as long as we are deciding to implement this
+                // feature without choice of opting-in or out, you ALWAYS have to have
+                // tracking enabled. Therefore, the other properties give a false sense of
+                // performance enhancement.
                 if (e->type() == QEvent::MouseMove && mouse->buttons() == 0) {
                     d->toolTipWidget = w;
                     d->toolTipPos = relpos;
diff --git a/src/gui/kernel/qapplication_mac.mm b/src/gui/kernel/qapplication_mac.mm
index 0884976..beccfb0 100644
--- a/src/gui/kernel/qapplication_mac.mm
+++ b/src/gui/kernel/qapplication_mac.mm
@@ -1316,8 +1316,13 @@ void QApplication::setOverrideCursor(const QCursor &cursor)
 {
     qApp->d_func()->cursor_list.prepend(cursor);
 
+#ifdef QT_MAC_USE_COCOA
+    QMacCocoaAutoReleasePool pool;
+    [static_cast<NSCursor *>(qt_mac_nsCursorForQCursor(cursor)) push];
+#else
     if (qApp && qApp->activeWindow())
         qt_mac_set_cursor(&qApp->d_func()->cursor_list.first(), QCursor::pos());
+#endif
 }
 
 void QApplication::restoreOverrideCursor()
@@ -1326,12 +1331,17 @@ void QApplication::restoreOverrideCursor()
         return;
     qApp->d_func()->cursor_list.removeFirst();
 
+#ifdef QT_MAC_USE_COCOA
+    QMacCocoaAutoReleasePool pool;
+    [NSCursor pop];
+#else
     if (qApp && qApp->activeWindow()) {
         const QCursor def(Qt::ArrowCursor);
         qt_mac_set_cursor(qApp->d_func()->cursor_list.isEmpty() ? &def : &qApp->d_func()->cursor_list.first(), QCursor::pos());
     }
-}
 #endif
+}
+#endif // QT_NO_CURSOR
 
 QWidget *QApplication::topLevelAt(const QPoint &p)
 {
diff --git a/src/gui/kernel/qapplication_p.h b/src/gui/kernel/qapplication_p.h
index db77b07..90eaba0 100644
--- a/src/gui/kernel/qapplication_p.h
+++ b/src/gui/kernel/qapplication_p.h
@@ -158,17 +158,19 @@ inline QPointF QTabletDeviceData::scaleCoord(int coordX, int coordY,
                                             int outOriginY, int outExtentY) const
 {
     QPointF ret;
+
     if (sign(outExtentX) == sign(maxX))
-        ret.setX(((coordX - minX) * qAbs(outExtentX) / qAbs(qreal(maxX))) + outOriginX);
+        ret.setX(((coordX - minX) * qAbs(outExtentX) / qAbs(qreal(maxX - minX))) + outOriginX);
     else
-        ret.setX(((qAbs(maxX) - (coordX - minX)) * qAbs(outExtentX) / qAbs(qreal(maxX)))
+        ret.setX(((qAbs(maxX) - (coordX - minX)) * qAbs(outExtentX) / qAbs(qreal(maxX - minX)))
                  + outOriginX);
 
     if (sign(outExtentY) == sign(maxY))
-        ret.setY(((coordY - minY) * qAbs(outExtentY) / qAbs(qreal(maxY))) + outOriginY);
+        ret.setY(((coordY - minY) * qAbs(outExtentY) / qAbs(qreal(maxY - minY))) + outOriginY);
     else
-        ret.setY(((qAbs(maxY) - (coordY - minY)) * qAbs(outExtentY) / qAbs(qreal(maxY)))
+        ret.setY(((qAbs(maxY) - (coordY - minY)) * qAbs(outExtentY) / qAbs(qreal(maxY - minY)))
                  + outOriginY);
+
     return ret;
 }
 #endif
diff --git a/src/gui/kernel/qapplication_win.cpp b/src/gui/kernel/qapplication_win.cpp
index e0eda82..e0c62b7 100644
--- a/src/gui/kernel/qapplication_win.cpp
+++ b/src/gui/kernel/qapplication_win.cpp
@@ -2956,7 +2956,9 @@ bool QETWidget::translateMouseEvent(const MSG &msg)
     if (alienWidget && alienWidget->internalWinId())
         alienWidget = 0;
 
-    if (type == QEvent::MouseMove || type == QEvent::NonClientAreaMouseMove) {
+    if (type == QEvent::MouseMove || type == QEvent::NonClientAreaMouseMove
+            || type == QEvent::TabletMove) {
+
         if (!(state & Qt::MouseButtonMask))
             qt_button_down = 0;
 #ifndef QT_NO_CURSOR
@@ -3087,6 +3089,8 @@ bool QETWidget::translateMouseEvent(const MSG &msg)
                 popupButtonFocus = popupChild;
                 break;
             case QEvent::MouseButtonRelease:
+            case QEvent::TabletRelease:
+
                 releaseAfter = true;
                 break;
             default:
@@ -3324,17 +3328,19 @@ static void tabletInit(UINT wActiveCsr, HCTX hTab)
         tdd.minTanPressure = int(np.axMin);
         tdd.maxTanPressure = int(np.axMax);
 
-        ptrWTInfo(WTI_DEVICES + lc.lcDevice, DVC_X, &np);
-        tdd.minX = int(np.axMin);
-        tdd.maxX = int(np.axMax);
+        LOGCONTEXT lcMine;
+
+      	/* get default region */
+        ptrWTInfo(WTI_DEFCONTEXT, 0, &lcMine);
+
+        tdd.minX = 0;
+        tdd.maxX = int(lcMine.lcInExtX) - int(lcMine.lcInOrgX);
 
-        ptrWTInfo(WTI_DEVICES + lc.lcDevice, DVC_Y, &np);
-        tdd.minY = int(np.axMin);
-        tdd.maxY = int(np.axMax);
+        tdd.minY = 0;
+        tdd.maxY = int(lcMine.lcInExtY) - int(lcMine.lcInOrgY);
 
-        ptrWTInfo(WTI_DEVICES + lc.lcDevice, DVC_Z, &np);
-        tdd.minZ = int(np.axMin);
-        tdd.maxZ = int(np.axMax);
+        tdd.minZ = 0;
+        tdd.maxZ = int(lcMine.lcInExtZ) - int(lcMine.lcInOrgZ);
 
         int csr_type,
             csr_physid;
@@ -3444,13 +3450,34 @@ bool QETWidget::translateTabletEvent(const MSG &msg, PACKET *localPacketBuf,
         }
         QPoint globalPos(qRound(hiResGlobal.x()), qRound(hiResGlobal.y()));
 
+        if (t == QEvent::TabletPress)
+        {
+            qt_button_down = QApplication::widgetAt(globalPos);
+        }
+
         // make sure the tablet event get's sent to the proper widget...
-        QWidget *w = QApplication::widgetAt(globalPos);
+        QWidget *w = 0;
+
         if (qt_button_down)
             w = qt_button_down; // Pass it to the thing that's grabbed it.
+        else
+            w = QApplication::widgetAt(globalPos);
 
         if (!w)
             w = this;
+
+        if (t == QEvent::TabletRelease)
+        {
+            if (qt_win_ignoreNextMouseReleaseEvent) {
+                qt_win_ignoreNextMouseReleaseEvent = false;
+                if (qt_button_down && qt_button_down->internalWinId() == autoCaptureWnd) {
+                    releaseAutoCapture();
+                    qt_button_down = 0;
+                }
+            }
+
+        }
+
         QPoint localPos = w->mapFromGlobal(globalPos);
 #ifndef QT_NO_TABLETEVENT
         if (currentTabletPointer.currentDevice == QTabletEvent::Airbrush) {
diff --git a/src/gui/kernel/qcocoapanel_mac.mm b/src/gui/kernel/qcocoapanel_mac.mm
index bdc7ecb..1e0bbdf 100644
--- a/src/gui/kernel/qcocoapanel_mac.mm
+++ b/src/gui/kernel/qcocoapanel_mac.mm
@@ -85,6 +85,12 @@ QT_USE_NAMESPACE
     last resort (i.e., this is code that can potentially be removed).
  */
 
+- (void)toggleToolbarShown:(id)sender
+{
+    macSendToolbarChangeEvent([self QT_MANGLE_NAMESPACE(qt_qwidget)]);
+    [super toggleToolbarShown:sender];
+}
+
 - (void)keyDown:(NSEvent *)theEvent
 {
     bool keyOK = qt_dispatchKeyEvent(theEvent, [self QT_MANGLE_NAMESPACE(qt_qwidget)]);
diff --git a/src/gui/kernel/qcocoaview_mac.mm b/src/gui/kernel/qcocoaview_mac.mm
index 64cdae6..52685ca 100644
--- a/src/gui/kernel/qcocoaview_mac.mm
+++ b/src/gui/kernel/qcocoaview_mac.mm
@@ -290,11 +290,18 @@ extern "C" {
 { 
     if (qwidget->testAttribute(Qt::WA_DropSiteRegistered) == false)
         return NSDragOperationNone;
+    NSPoint windowPoint = [sender draggingLocation];
+    if (qwidget->testAttribute(Qt::WA_TransparentForMouseEvents)) {
+        // pass the drag enter event to the view underneath.
+        NSView *candidateView = [[[self window] contentView] hitTest:windowPoint];
+        if (candidateView && candidateView != self)
+            return [candidateView draggingEntered:sender];
+    }
+    dragEnterSequence = [sender draggingSequenceNumber];
     [self addDropData:sender];
     QMimeData *mimeData = dropData;
     if (QDragManager::self()->source())
         mimeData = QDragManager::self()->dragPrivate()->data;
-    NSPoint windowPoint = [sender draggingLocation];
     NSPoint globalPoint = [[sender draggingDestinationWindow] convertBaseToScreen:windowPoint];
     NSPoint localPoint = [self convertPoint:windowPoint fromView:nil];
     QPoint posDrag(localPoint.x, localPoint.y);
@@ -318,6 +325,9 @@ extern "C" {
         [self removeDropData];
         return NSDragOperationNone;
     } else {
+        // save the mouse position, used by draggingExited handler.
+        DnDParams *dndParams = [QCocoaView currentMouseEvent];
+        dndParams->activeDragEnterPos = windowPoint;
         // send a drag move event immediately after a drag enter event (as per documentation).
         QDragMoveEvent qDMEvent(posDrag, qtAllowed, mimeData, QApplication::mouseButtons(), modifiers);
         qDMEvent.setDropAction(qDEEvent.dropAction());
@@ -338,11 +348,22 @@ extern "C" {
 
 - (NSDragOperation)draggingUpdated:(id < NSDraggingInfo >)sender
 {
-    // drag enter event was rejected, so ignore the move event. 
+    NSPoint windowPoint = [sender draggingLocation];
+    if (qwidget->testAttribute(Qt::WA_TransparentForMouseEvents)) {
+        // pass the drag move event to the view underneath.
+        NSView *candidateView = [[[self window] contentView] hitTest:windowPoint];
+        if (candidateView && candidateView != self)
+            return [candidateView draggingUpdated:sender];
+    }
+    // in cases like QFocusFrame, the view under the mouse might
+    // not have received the drag enter. Generate a synthetic
+    // drag enter event for that view.
+    if (dragEnterSequence != [sender draggingSequenceNumber])
+        [self draggingEntered:sender];
+    // drag enter event was rejected, so ignore the move event.
     if (dropData == 0)
         return NSDragOperationNone;
     // return last value, if we are still in the answerRect.
-    NSPoint windowPoint = [sender draggingLocation];
     NSPoint globalPoint = [[sender draggingDestinationWindow] convertBaseToScreen:windowPoint];
     NSPoint localPoint = [self convertPoint:windowPoint fromView:nil];
     NSDragOperation nsActions = [sender draggingSourceOperationMask];
@@ -381,21 +402,34 @@ extern "C" {
 
 - (void)draggingExited:(id < NSDraggingInfo >)sender
 {
-    Q_UNUSED(sender)
-    // drag enter event was rejected, so ignore the move event. 
+    dragEnterSequence = -1;
+    if (qwidget->testAttribute(Qt::WA_TransparentForMouseEvents)) {
+        // try sending the leave event to the last view which accepted drag enter.
+        DnDParams *dndParams = [QCocoaView currentMouseEvent];
+        NSView *candidateView = [[[self window] contentView] hitTest:dndParams->activeDragEnterPos];
+        if (candidateView && candidateView != self)
+            return [candidateView draggingExited:sender];
+    }
+    // drag enter event was rejected, so ignore the move event.
     if (dropData) {
         QDragLeaveEvent de;
         QApplication::sendEvent(qwidget, &de);
         [self removeDropData];
     }
-
 }
 
 - (BOOL)performDragOperation:(id <NSDraggingInfo>)sender
 {
+    NSPoint windowPoint = [sender draggingLocation];
+    dragEnterSequence = -1;
+    if (qwidget->testAttribute(Qt::WA_TransparentForMouseEvents)) {
+        // pass the drop event to the view underneath.
+        NSView *candidateView = [[[self window] contentView] hitTest:windowPoint];
+        if (candidateView && candidateView != self)
+            return [candidateView performDragOperation:sender];
+    }
     [self addDropData:sender];
 
-    NSPoint windowPoint = [sender draggingLocation];
     NSPoint globalPoint = [[sender draggingDestinationWindow] convertBaseToScreen:windowPoint];
     NSPoint localPoint = [self convertPoint:windowPoint fromView:nil];
     QPoint posDrop(localPoint.x, localPoint.y);
@@ -574,11 +608,15 @@ extern "C" {
             [self removeTrackingArea:t];
         }
     }
+
+    // Ideally, we shouldn't have NSTrackingMouseMoved events included below, it should
+    // only be turned on if mouseTracking, hover is on or a tool tip is set.
+    // Unfortunately, Qt will send "tooltip" events on mouse moves, so we need to
+    // turn it on in ALL case. That means EVERY QCocoaView gets to pay the cost of
+    // mouse moves delivered to it (Apple recommends keeping it OFF because there
+    // is a performance hit). So it goes.
     NSUInteger trackingOptions = NSTrackingMouseEnteredAndExited | NSTrackingActiveInActiveApp
-                                 | NSTrackingInVisibleRect;
-    if (qwidget->hasMouseTracking() || !qwidgetprivate->toolTip.isEmpty()
-        || qwidget->testAttribute(Qt::WA_Hover))
-        trackingOptions |= NSTrackingMouseMoved;
+                                 | NSTrackingInVisibleRect | NSTrackingMouseMoved;
     NSTrackingArea *ta = [[NSTrackingArea alloc] initWithRect:NSMakeRect(0, 0,
                                                                          qwidget->width(),
                                                                          qwidget->height())
@@ -643,62 +681,6 @@ extern "C" {
     qt_mac_handleMouseEvent(self, theEvent, QEvent::MouseMove, Qt::NoButton);
 }
 
-- (NSView *)viewUnderTransparentForMouseView:(NSView *)mouseView widget:(QWidget *)widgetToGetMouse
-                             withWindowPoint:(NSPoint)windowPoint
-{
-    NSMutableArray *viewsToLookAt = [NSMutableArray arrayWithCapacity:5];
-    [viewsToLookAt addObject:mouseView];
-    QWidget *parentWidget = widgetToGetMouse->parentWidget();
-    while (parentWidget) {
-        [viewsToLookAt addObject:qt_mac_nativeview_for(parentWidget)];
-        parentWidget = parentWidget->parentWidget();
-    }
-
-    // Now walk through the subviews of each view and determine which subview should
-    // get the event. We look through all the subviews at a given level with
-    // the assumption that the last item to be found the candidate has a higher z-order.
-    // Unfortunately, fast enumeration doesn't go backwards in 10.5, so assume go fast
-    // forward is quicker than the slow normal way backwards.
-    NSView *candidateView = nil;
-    for (NSView *lookView in viewsToLookAt) {
-        NSPoint tmpPoint = [lookView convertPoint:windowPoint fromView:nil];
-        for (NSView *view in [lookView subviews]) {
-            if (view == mouseView || [view isHidden])
-                continue;
-            NSRect frameRect = [view frame];
-            if (NSMouseInRect(tmpPoint, [view frame], [view isFlipped]))
-                candidateView = view;
-        }
-        if (candidateView)
-            break;
-    }
-    
-    
-    if (candidateView != nil) {
-        // Now that we've got a candidate, we have to dig into it's tree and see where it is.
-        NSView *lowerView = nil;
-        NSView *viewForDescent = candidateView;
-        while (viewForDescent) {
-            NSPoint tmpPoint = [viewForDescent convertPoint:windowPoint fromView:nil];                
-            // Apply same rule as above wrt z-order.
-            for (NSView *view in [viewForDescent subviews]) {
-                if (![view isHidden] && NSMouseInRect(tmpPoint, [view frame], [view isFlipped]))
-                    lowerView = view;
-            }
-            if (!lowerView) // Low as we can be at this point.
-                candidateView = viewForDescent;
-
-            // Try to go deeper, will also exit out of the loop, if we found the point.
-            viewForDescent = lowerView;
-            lowerView = nil;
-        }
-    }
-    // I am transparent, so I can't be a candidate.
-    if (candidateView == mouseView)
-        candidateView = nil;
-    return candidateView;
-}
-
 - (void)mouseDown:(NSEvent *)theEvent
 {
     qt_mac_handleMouseEvent(self, theEvent, QEvent::MouseButtonPress, Qt::LeftButton);
diff --git a/src/gui/kernel/qcocoaview_mac_p.h b/src/gui/kernel/qcocoaview_mac_p.h
index 6583139..4762b17 100644
--- a/src/gui/kernel/qcocoaview_mac_p.h
+++ b/src/gui/kernel/qcocoaview_mac_p.h
@@ -68,6 +68,7 @@ struct DnDParams
     NSEvent *theEvent;
     NSPoint localPoint;
     NSDragOperation performedAction;
+    NSPoint activeDragEnterPos;
 };
 
 QT_END_NAMESPACE
@@ -86,6 +87,7 @@ Q_GUI_EXPORT
     bool sendKeyEvents;
     QString *composingText;
     QStringList *currentCustomTypes;
+    NSInteger dragEnterSequence;
 }
 - (id)initWithQWidget:(QWidget *)widget widgetPrivate:(QWidgetPrivate *)widgetprivate;
 - (void) finishInitWithQWidget:(QWidget *)widget widgetPrivate:(QWidgetPrivate *)widgetprivate;
@@ -104,8 +106,6 @@ Q_GUI_EXPORT
 - (QWidget *)qt_qwidget;
 - (BOOL)qt_leftButtonIsRightButton;
 - (void)qt_setLeftButtonIsRightButton:(BOOL)isSwapped;
-- (NSView *)viewUnderTransparentForMouseView:(NSView *)mouseView widget:(QWidget *)widgetToGetMouse
-                             withWindowPoint:(NSPoint)windowPoint;
 + (DnDParams*)currentMouseEvent;
 
 @end
diff --git a/src/gui/kernel/qcocoawindow_mac.mm b/src/gui/kernel/qcocoawindow_mac.mm
index 7084416..eb08982 100644
--- a/src/gui/kernel/qcocoawindow_mac.mm
+++ b/src/gui/kernel/qcocoawindow_mac.mm
@@ -104,6 +104,12 @@ QT_USE_NAMESPACE
     last resort (i.e., this is code that can potentially be removed).
  */
 
+- (void)toggleToolbarShown:(id)sender
+{
+    macSendToolbarChangeEvent([self QT_MANGLE_NAMESPACE(qt_qwidget)]);
+    [super toggleToolbarShown:sender];
+}
+
 - (void)keyDown:(NSEvent *)theEvent
 {
     bool keyOK = qt_dispatchKeyEvent(theEvent, [self QT_MANGLE_NAMESPACE(qt_qwidget)]);
diff --git a/src/gui/kernel/qmultitouch_mac.mm b/src/gui/kernel/qmultitouch_mac.mm
index 3fe85a9..3d2eae6 100644
--- a/src/gui/kernel/qmultitouch_mac.mm
+++ b/src/gui/kernel/qmultitouch_mac.mm
@@ -48,7 +48,7 @@ QT_BEGIN_NAMESPACE
 
 #ifdef QT_MAC_USE_COCOA
 
-QHash<int, QCocoaTouch*> QCocoaTouch::_currentTouches;
+QHash<qint64, QCocoaTouch*> QCocoaTouch::_currentTouches;
 QPointF QCocoaTouch::_screenReferencePos;
 QPointF QCocoaTouch::_trackpadReferencePos;
 int QCocoaTouch::_idAssignmentCount = 0;
@@ -62,7 +62,7 @@ QCocoaTouch::QCocoaTouch(NSTouch *nstouch)
 
     _touchPoint.setId(_idAssignmentCount++);
     _touchPoint.setPressure(1.0);
-    _identity = int([nstouch identity]);
+    _identity = qint64([nstouch identity]);
     _currentTouches.insert(_identity, this);
     updateTouchData(nstouch, NSTouchPhaseBegan);
 }
@@ -100,7 +100,7 @@ void QCocoaTouch::updateTouchData(NSTouch *nstouch, NSTouchPhase phase)
 
 QCocoaTouch *QCocoaTouch::findQCocoaTouch(NSTouch *nstouch)
 {
-    int identity = int([nstouch identity]);
+    qint64 identity = qint64([nstouch identity]);
     if (_currentTouches.contains(identity))
         return _currentTouches.value(identity);
     return 0;
diff --git a/src/gui/kernel/qmultitouch_mac_p.h b/src/gui/kernel/qmultitouch_mac_p.h
index 3fa8f6c..618e9ca 100644
--- a/src/gui/kernel/qmultitouch_mac_p.h
+++ b/src/gui/kernel/qmultitouch_mac_p.h
@@ -74,7 +74,7 @@ class QCocoaTouch
         static void setMouseInDraggingState(bool inDraggingState);
 
     private:
-        static QHash<int, QCocoaTouch*> _currentTouches;
+        static QHash<qint64, QCocoaTouch*> _currentTouches;
         static QPointF _screenReferencePos;
         static QPointF _trackpadReferencePos;
         static int _idAssignmentCount;
@@ -82,7 +82,7 @@ class QCocoaTouch
         static bool _updateInternalStateOnly;
 
         QTouchEvent::TouchPoint _touchPoint;
-        int _identity;
+        qint64 _identity;
 
         QCocoaTouch(NSTouch *nstouch);
         ~QCocoaTouch();
diff --git a/src/gui/kernel/qt_cocoa_helpers_mac.mm b/src/gui/kernel/qt_cocoa_helpers_mac.mm
index 13b0e50..a98a7f8 100644
--- a/src/gui/kernel/qt_cocoa_helpers_mac.mm
+++ b/src/gui/kernel/qt_cocoa_helpers_mac.mm
@@ -177,11 +177,10 @@ void macWindowToolbarShow(const QWidget *widget, bool show )
 {
     OSWindowRef wnd = qt_mac_window_for(widget);
 #if QT_MAC_USE_COCOA
-    NSToolbar *toolbar	= [wnd toolbar];
-    if (toolbar) {
+    if (NSToolbar *toolbar = [wnd toolbar]) {
         QMacCocoaAutoReleasePool pool;
         if (show != [toolbar isVisible]) {
-           [wnd toggleToolbarShown:wnd];
+           [toolbar setVisible:show];
         } else {
             // The toolbar may be in sync, but we are not, update our framestrut.
             qt_widget_private(const_cast<QWidget *>(widget))->updateFrameStrut();
@@ -197,22 +196,21 @@ void macWindowToolbarSet( void * /*OSWindowRef*/ window, void *toolbarRef  )
 {
     OSWindowRef wnd = static_cast<OSWindowRef>(window);
 #if QT_MAC_USE_COCOA
-	[wnd setToolbar:static_cast<NSToolbar *>(toolbarRef)];
+    [wnd setToolbar:static_cast<NSToolbar *>(toolbarRef)];
 #else
     SetWindowToolbar(wnd, static_cast<HIToolbarRef>(toolbarRef));
 #endif
 }
 
-bool macWindowToolbarVisible( void * /*OSWindowRef*/ window )
+bool macWindowToolbarIsVisible( void * /*OSWindowRef*/ window )
 {
     OSWindowRef wnd = static_cast<OSWindowRef>(window);
 #if QT_MAC_USE_COCOA
-	NSToolbar *toolbar	= [wnd toolbar];
-	if (toolbar)
+    if (NSToolbar *toolbar = [wnd toolbar])
         return [toolbar isVisible];
     return false;
 #else
-	return IsWindowToolbarVisible(wnd);
+    return IsWindowToolbarVisible(wnd);
 #endif
 }
 
@@ -220,12 +218,12 @@ void macWindowSetHasShadow( void * /*OSWindowRef*/ window, bool hasShadow  )
 {
     OSWindowRef wnd = static_cast<OSWindowRef>(window);
 #if QT_MAC_USE_COCOA
-	[wnd setHasShadow:BOOL(hasShadow)];
+    [wnd setHasShadow:BOOL(hasShadow)];
 #else
-	if (hasShadow)
-		ChangeWindowAttributes(wnd, 0, kWindowNoShadowAttribute);
-	else
-		ChangeWindowAttributes(wnd, kWindowNoShadowAttribute, 0);
+    if (hasShadow)
+        ChangeWindowAttributes(wnd, 0, kWindowNoShadowAttribute);
+    else
+        ChangeWindowAttributes(wnd, kWindowNoShadowAttribute, 0);
 #endif
 }
 
@@ -233,9 +231,9 @@ void macWindowFlush(void * /*OSWindowRef*/ window)
 {
     OSWindowRef wnd = static_cast<OSWindowRef>(window);
 #if QT_MAC_USE_COCOA
-	[wnd flushWindowIfNeeded];
+    [wnd flushWindowIfNeeded];
 #else
-	HIWindowFlush(wnd);
+    HIWindowFlush(wnd);
 #endif
 }
 
@@ -352,6 +350,12 @@ Qt::MouseButton qt_mac_get_button(EventMouseButton button)
     return Qt::NoButton;
 }
 
+void macSendToolbarChangeEvent(QWidget *widget)
+{
+    QToolBarChangeEvent ev(!(GetCurrentKeyModifiers() & cmdKey));
+    qt_sendSpontaneousEvent(widget, &ev);
+}
+
 Q_GLOBAL_STATIC(QMacTabletHash, tablet_hash)
 QMacTabletHash *qt_mac_tablet_hash()
 {
diff --git a/src/gui/kernel/qt_cocoa_helpers_mac_p.h b/src/gui/kernel/qt_cocoa_helpers_mac_p.h
index 3881ccd..5f6204f 100644
--- a/src/gui/kernel/qt_cocoa_helpers_mac_p.h
+++ b/src/gui/kernel/qt_cocoa_helpers_mac_p.h
@@ -118,9 +118,10 @@ void macWindowFade(void * /*OSWindowRef*/ window, float durationSeconds = 0);
 bool macWindowIsTextured(void * /*OSWindowRef*/ window);
 void macWindowToolbarShow(const QWidget *widget, bool show );
 void macWindowToolbarSet( void * /*OSWindowRef*/ window, void* toolbarRef );
-bool macWindowToolbarVisible( void * /*OSWindowRef*/ window );
+bool macWindowToolbarIsVisible( void * /*OSWindowRef*/ window );
 void macWindowSetHasShadow( void * /*OSWindowRef*/ window, bool hasShadow );
 void macWindowFlush(void * /*OSWindowRef*/ window);
+void macSendToolbarChangeEvent(QWidget *widget);
 struct HIContentBorderMetrics;
 void qt_mac_updateContentBorderMetricts(void * /*OSWindowRef */window, const ::HIContentBorderMetrics &metrics);
 void * /*NSImage */qt_mac_create_nsimage(const QPixmap &pm);
diff --git a/src/gui/kernel/qt_mac.cpp b/src/gui/kernel/qt_mac.cpp
index 27df5d1..0c3b707 100644
--- a/src/gui/kernel/qt_mac.cpp
+++ b/src/gui/kernel/qt_mac.cpp
@@ -134,7 +134,7 @@ QColor qcolorForThemeTextColor(ThemeTextColor themeColor)
 #ifdef Q_OS_MAC32
     RGBColor c;
     GetThemeTextColor(themeColor, 32, true, &c);
-    QColor color = QColor(c.red / 265, c.green / 256, c.blue / 256);
+    QColor color = QColor(c.red / 256, c.green / 256, c.blue / 256);
     return color;
 #else
     // There is no equivalent to GetThemeTextColor in 64-bit and it was rather bad that
@@ -156,13 +156,13 @@ QColor qcolorForThemeTextColor(ThemeTextColor themeColor)
     case kThemeTextColorAlertInactive:
     case kThemeTextColorDialogInactive:
     case kThemeTextColorPlacardInactive:
-        return QColor(67, 69, 69, 255);
+        return QColor(69, 69, 69, 255);
     case kThemeTextColorPopupButtonInactive:
     case kThemeTextColorPopupLabelInactive:
     case kThemeTextColorPushButtonInactive:
     case kThemeTextColorTabFrontInactive:
     case kThemeTextColorBevelButtonInactive:
-        return QColor(123, 127, 127, 255);
+        return QColor(127, 127, 127, 255);
     default: {
         QNativeImage nativeImage(16,16, QNativeImage::systemFormat());
         CGRect cgrect = CGRectMake(0, 0, 16, 16);
diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index d1ab45a..c21ebda 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -4541,6 +4541,11 @@ void QWidget::unsetLayoutDirection()
     By default, this property contains a cursor with the Qt::ArrowCursor
     shape.
 
+    Some underlying window implementations will reset the cursor if it
+    leaves a widget even if the mouse is grabbed. If you want to have
+    a cursor set for all widgets, even when outside the window, consider
+    QApplication::setOverrideCursor().
+
     \sa QApplication::setOverrideCursor()
 */
 
@@ -9894,11 +9899,8 @@ void QWidget::setAttribute(Qt::WidgetAttribute attribute, bool on)
         break;
     case Qt::WA_InputMethodEnabled: {
         QInputContext *ic = d->ic;
-        if (!ic) {
-            // implicitly create input context only if we have a focus
-            if (hasFocus())
-                ic = d->inputContext();
-        }
+        if (!ic && (!on || hasFocus()))
+            ic = d->inputContext();
         if (ic) {
             if (on && hasFocus() && ic->focusWidget() != this && isEnabled()) {
                 ic->setFocusWidget(this);
diff --git a/src/gui/kernel/qwidget_mac.mm b/src/gui/kernel/qwidget_mac.mm
index ad16485..5e2dfb6 100644
--- a/src/gui/kernel/qwidget_mac.mm
+++ b/src/gui/kernel/qwidget_mac.mm
@@ -843,8 +843,7 @@ OSStatus QWidgetPrivate::qt_window_event(EventHandlerCallRef er, EventRef event,
             extern QPointer<QWidget> qt_button_down; //qapplication_mac.cpp
             qt_button_down = 0;
         } else if(ekind == kEventWindowToolbarSwitchMode) {
-            QToolBarChangeEvent ev(!(GetCurrentKeyModifiers() & cmdKey));
-            QApplication::sendSpontaneousEvent(widget, &ev);
+            macSendToolbarChangeEvent(widget);
             HIToolbarRef toolbar;
             if (GetWindowToolbar(wid, &toolbar) == noErr) {
                 if (toolbar) {
@@ -1521,12 +1520,16 @@ void QWidgetPrivate::toggleDrawers(bool visible)
  *****************************************************************************/
 bool QWidgetPrivate::qt_mac_update_sizer(QWidget *w, int up)
 {
+    // I'm not sure what "up" is
     if(!w || !w->isWindow())
         return false;
 
     QTLWExtra *topData = w->d_func()->topData();
     QWExtra *extraData = w->d_func()->extraData();
-    topData->resizer += up;
+    // topData->resizer is only 4 bits, so subtracting -1 from zero causes bad stuff
+    // to happen, prevent that here (you really want the thing hidden).
+    if (up >= 0 || topData->resizer != 0)
+        topData->resizer += up;
     OSWindowRef windowRef = qt_mac_window_for(OSViewRef(w->winId()));
     {
 #ifndef QT_MAC_USE_COCOA
@@ -1539,7 +1542,6 @@ bool QWidgetPrivate::qt_mac_update_sizer(QWidget *w, int up)
     bool remove_grip = (topData->resizer || (w->windowFlags() & Qt::FramelessWindowHint)
                         || (extraData->maxw && extraData->maxh &&
                             extraData->maxw == extraData->minw && extraData->maxh == extraData->minh));
-
 #ifndef QT_MAC_USE_COCOA
     WindowAttributes attr;
     GetWindowAttributes(windowRef, &attr);
diff --git a/src/gui/math3d/qgenericmatrix.h b/src/gui/math3d/qgenericmatrix.h
index 1131f9b..7bdf70a 100644
--- a/src/gui/math3d/qgenericmatrix.h
+++ b/src/gui/math3d/qgenericmatrix.h
@@ -119,7 +119,9 @@ Q_INLINE_TEMPLATE QGenericMatrix<N, M, T, InnerT>::QGenericMatrix()
 template <int N, int M, typename T, typename InnerT>
 Q_INLINE_TEMPLATE QGenericMatrix<N, M, T, InnerT>::QGenericMatrix(const QGenericMatrix<N, M, T, InnerT>& other)
 {
-    qMemCopy(m, other.m, sizeof(m));
+    for (int col = 0; col < N; ++col)
+        for (int row = 0; row < M; ++row)
+            m[col][row] = other.m[col][row];
 }
 
 template <int N, int M, typename T, typename InnerT>
diff --git a/src/gui/math3d/qmatrix4x4.cpp b/src/gui/math3d/qmatrix4x4.cpp
index b998353..88f58c8 100644
--- a/src/gui/math3d/qmatrix4x4.cpp
+++ b/src/gui/math3d/qmatrix4x4.cpp
@@ -53,10 +53,6 @@ QT_BEGIN_NAMESPACE
     \brief The QMatrix4x4 class represents a 4x4 transformation matrix in 3D space.
     \since 4.6
 
-    The matrix elements are stored internally using the most efficient
-    numeric representation for the underlying hardware: floating-point
-    or fixed-point.
-
     \sa QVector3D, QGenericMatrix
 */
 
@@ -308,8 +304,7 @@ QMatrix4x4::QMatrix4x4(const QTransform& transform)
 // The 4x4 matrix inverse algorithm is based on that described at:
 // http://www.j3d.org/matrix_faq/matrfaq_latest.html#Q24
 // Some optimization has been done to avoid making copies of 3x3
-// sub-matrices, to do calculations in fixed-point where required,
-// and to unroll the loops.
+// sub-matrices and to unroll the loops.
 
 // Calculate the determinant of a 3x3 sub-matrix.
 //     | A B C |
diff --git a/src/gui/math3d/qquaternion.cpp b/src/gui/math3d/qquaternion.cpp
index 9988e2b..d9d4160 100644
--- a/src/gui/math3d/qquaternion.cpp
+++ b/src/gui/math3d/qquaternion.cpp
@@ -55,10 +55,6 @@ QT_BEGIN_NAMESPACE
     Quaternions are used to represent rotations in 3D space, and
     consist of a 3D rotation axis specified by the x, y, and z
     coordinates, and a scalar representing the rotation angle.
-
-    The components of a quaternion are stored internally using the most
-    efficient representation for the GL rendering engine, which will be
-    either floating-point or fixed-point.
 */
 
 /*!
diff --git a/src/gui/math3d/qvector2d.cpp b/src/gui/math3d/qvector2d.cpp
index 9b5d123..b492aa8 100644
--- a/src/gui/math3d/qvector2d.cpp
+++ b/src/gui/math3d/qvector2d.cpp
@@ -57,9 +57,7 @@ QT_BEGIN_NAMESPACE
     The QVector2D class can also be used to represent vertices in 2D space.
     We therefore do not need to provide a separate vertex class.
 
-    The coordinates are stored internally using the most efficient
-    representation for the GL rendering engine, which will be either
-    floating-point or fixed-point.
+    \sa QVector3D, QVector4D, QQuaternion
 */
 
 /*!
diff --git a/src/gui/math3d/qvector3d.cpp b/src/gui/math3d/qvector3d.cpp
index 977152a..95550cd 100644
--- a/src/gui/math3d/qvector3d.cpp
+++ b/src/gui/math3d/qvector3d.cpp
@@ -61,9 +61,7 @@ QT_BEGIN_NAMESPACE
     The QVector3D class can also be used to represent vertices in 3D space.
     We therefore do not need to provide a separate vertex class.
 
-    The coordinates are stored internally using the most efficient
-    representation for the GL rendering engine, which will be either
-    floating-point or fixed-point.
+    \sa QVector2D, QVector4D, QQuaternion
 */
 
 /*!
diff --git a/src/gui/math3d/qvector4d.cpp b/src/gui/math3d/qvector4d.cpp
index a28d2a1..1f7d921 100644
--- a/src/gui/math3d/qvector4d.cpp
+++ b/src/gui/math3d/qvector4d.cpp
@@ -57,10 +57,6 @@ QT_BEGIN_NAMESPACE
     The QVector4D class can also be used to represent vertices in 4D space.
     We therefore do not need to provide a separate vertex class.
 
-    The coordinates are stored internally using the most efficient
-    representation for the GL rendering engine, which will be either
-    floating-point or fixed-point.
-
     \sa QQuaternion, QVector2D, QVector3D
 */
 
diff --git a/src/gui/text/qsyntaxhighlighter.cpp b/src/gui/text/qsyntaxhighlighter.cpp
index db1a38e..f69562d 100644
--- a/src/gui/text/qsyntaxhighlighter.cpp
+++ b/src/gui/text/qsyntaxhighlighter.cpp
@@ -65,6 +65,18 @@ public:
 
     void _q_reformatBlocks(int from, int charsRemoved, int charsAdded);
     void reformatBlock(QTextBlock block);
+    
+    inline void rehighlight(QTextCursor &cursor, QTextCursor::MoveOperation operation) {
+        QObject::disconnect(doc, SIGNAL(contentsChange(int,int,int)),
+                            q_func(), SLOT(_q_reformatBlocks(int,int,int)));
+        cursor.beginEditBlock();
+        int from = cursor.position();
+        cursor.movePosition(operation);
+        _q_reformatBlocks(from, 0, cursor.position() - from);
+        cursor.endEditBlock();
+        QObject::connect(doc, SIGNAL(contentsChange(int,int,int)),
+                         q_func(), SLOT(_q_reformatBlocks(int,int,int)));
+    }
 
     inline void _q_delayedRehighlight() {
         if (!rehighlightPending)
@@ -356,6 +368,8 @@ QTextDocument *QSyntaxHighlighter::document() const
     \since 4.2
 
     Redoes the highlighting of the whole document.
+
+    \sa rehighlightBlock()
 */
 void QSyntaxHighlighter::rehighlight()
 {
@@ -363,15 +377,25 @@ void QSyntaxHighlighter::rehighlight()
     if (!d->doc)
         return;
 
-    disconnect(d->doc, SIGNAL(contentsChange(int,int,int)),
-               this, SLOT(_q_reformatBlocks(int,int,int)));
     QTextCursor cursor(d->doc);
-    cursor.beginEditBlock();
-    cursor.movePosition(QTextCursor::End);
-    d->_q_reformatBlocks(0, 0, cursor.position());
-    cursor.endEditBlock();
-    connect(d->doc, SIGNAL(contentsChange(int,int,int)),
-            this, SLOT(_q_reformatBlocks(int,int,int)));
+    d->rehighlight(cursor, QTextCursor::End);
+}
+
+/*!
+    \since 4.6
+
+    Redoes the highlighting of the given QTextBlock \a block.
+    
+    \sa rehighlight()
+*/
+void QSyntaxHighlighter::rehighlightBlock(const QTextBlock &block)
+{
+    Q_D(QSyntaxHighlighter);
+    if (!d->doc)
+        return;
+
+    QTextCursor cursor(block);
+    d->rehighlight(cursor, QTextCursor::EndOfBlock);
 }
 
 /*!
diff --git a/src/gui/text/qsyntaxhighlighter.h b/src/gui/text/qsyntaxhighlighter.h
index 4e5271b..ee249b8 100644
--- a/src/gui/text/qsyntaxhighlighter.h
+++ b/src/gui/text/qsyntaxhighlighter.h
@@ -78,6 +78,7 @@ public:
 
 public Q_SLOTS:
     void rehighlight();
+    void rehighlightBlock(const QTextBlock &block);
 
 protected:
     virtual void highlightBlock(const QString &text) = 0;
diff --git a/src/gui/widgets/qabstractscrollarea_p.h b/src/gui/widgets/qabstractscrollarea_p.h
index 7e0f444..aef8ac5 100644
--- a/src/gui/widgets/qabstractscrollarea_p.h
+++ b/src/gui/widgets/qabstractscrollarea_p.h
@@ -62,7 +62,7 @@ QT_BEGIN_NAMESPACE
 
 class QScrollBar;
 class QAbstractScrollAreaScrollBarContainer;
-class QAbstractScrollAreaPrivate: public QFramePrivate
+class Q_AUTOTEST_EXPORT QAbstractScrollAreaPrivate: public QFramePrivate
 {
     Q_DECLARE_PUBLIC(QAbstractScrollArea)
 
diff --git a/src/gui/widgets/qabstractspinbox.cpp b/src/gui/widgets/qabstractspinbox.cpp
index da18d13..433406c 100644
--- a/src/gui/widgets/qabstractspinbox.cpp
+++ b/src/gui/widgets/qabstractspinbox.cpp
@@ -1577,7 +1577,7 @@ void QAbstractSpinBox::initStyleOption(QStyleOptionSpinBox *option) const
     option->initFrom(this);
     option->activeSubControls = QStyle::SC_None;
     option->buttonSymbols = d->buttonSymbols;
-    option->subControls = QStyle::SC_SpinBoxFrame;
+    option->subControls = QStyle::SC_SpinBoxFrame | QStyle::SC_SpinBoxEditField;
     if (d->buttonSymbols != QAbstractSpinBox::NoButtons) {
         option->subControls |= QStyle::SC_SpinBoxUp | QStyle::SC_SpinBoxDown;
         if (d->buttonState & Up) {
diff --git a/src/gui/widgets/qdockarealayout.cpp b/src/gui/widgets/qdockarealayout.cpp
index b905ccd..ee29b55 100644
--- a/src/gui/widgets/qdockarealayout.cpp
+++ b/src/gui/widgets/qdockarealayout.cpp
@@ -1707,7 +1707,7 @@ QDockAreaLayoutItem &QDockAreaLayoutInfo::item(const QList<int> &path)
     Q_ASSERT(!path.isEmpty());
     const int index = path.first();
     if (path.count() > 1) {
-        const QDockAreaLayoutItem &item = item_list.at(index);
+        const QDockAreaLayoutItem &item = item_list[index];
         Q_ASSERT(item.subinfo != 0);
         return item.subinfo->item(path.mid(1));
     }
diff --git a/src/gui/widgets/qeffects.cpp b/src/gui/widgets/qeffects.cpp
index d6d0a16..f3b1b76 100644
--- a/src/gui/widgets/qeffects.cpp
+++ b/src/gui/widgets/qeffects.cpp
@@ -128,7 +128,8 @@ QAlphaWidget::~QAlphaWidget()
 {
 #if defined(Q_WS_WIN) && !defined(Q_WS_WINCE)
     // Restore user-defined opacity value
-    widget->setWindowOpacity(windowOpacity);
+    if (widget)
+        widget->setWindowOpacity(windowOpacity);
 #endif
 }
 
diff --git a/src/gui/widgets/qgroupbox.cpp b/src/gui/widgets/qgroupbox.cpp
index 2380e78..5758b6a 100644
--- a/src/gui/widgets/qgroupbox.cpp
+++ b/src/gui/widgets/qgroupbox.cpp
@@ -478,11 +478,7 @@ void QGroupBox::focusInEvent(QFocusEvent *fe)
     if (focusPolicy() == Qt::NoFocus) {
         d->_q_fixFocus(fe->reason());
     } else {
-        QStyleOptionGroupBox box;
-        initStyleOption(&box);
-        QRect rect = style()->subControlRect(QStyle::CC_GroupBox, &box, QStyle::SC_GroupBoxCheckBox, this)
-            | style()->subControlRect(QStyle::CC_GroupBox, &box, QStyle::SC_GroupBoxLabel, this);
-        update(rect);
+        QWidget::focusInEvent(fe);
     }
 }
 
diff --git a/src/gui/widgets/qmainwindow.cpp b/src/gui/widgets/qmainwindow.cpp
index 0c841eb..c51bed9 100644
--- a/src/gui/widgets/qmainwindow.cpp
+++ b/src/gui/widgets/qmainwindow.cpp
@@ -1369,20 +1369,25 @@ bool QMainWindow::event(QEvent *event)
 #ifdef Q_WS_MAC
         case QEvent::Show:
             if (unifiedTitleAndToolBarOnMac())
-                macWindowToolbarShow(this, true);
+                d->layout->syncUnifiedToolbarVisibility();
+            d->layout->blockVisiblityCheck = false;
             break;
-#  ifdef QT_MAC_USE_COCOA
        case QEvent::WindowStateChange:
             {
+                if (isHidden()) {
+                    // We are coming out of a minimize, leave things as is.
+                    d->layout->blockVisiblityCheck = true;
+                }
+#  ifdef QT_MAC_USE_COCOA
                 // We need to update the HIToolbar status when we go out of or into fullscreen.
                 QWindowStateChangeEvent *wce = static_cast<QWindowStateChangeEvent *>(event);
                 if ((windowState() & Qt::WindowFullScreen) || (wce->oldState() & Qt::WindowFullScreen)) {
                     d->layout->updateHIToolBarStatus();
                 }
+#  endif // Cocoa
             }
             break;
-#  endif // Cocoa
-#endif
+#endif // Q_WS_MAC
 #if !defined(QT_NO_DOCKWIDGET) && !defined(QT_NO_CURSOR)
        case QEvent::CursorChange:
            if (d->cursorAdjusted) {
diff --git a/src/gui/widgets/qmainwindowlayout.cpp b/src/gui/widgets/qmainwindowlayout.cpp
index aba9120..3936a67 100644
--- a/src/gui/widgets/qmainwindowlayout.cpp
+++ b/src/gui/widgets/qmainwindowlayout.cpp
@@ -939,15 +939,70 @@ void QMainWindowLayout::getStyleOptionInfo(QStyleOptionToolBar *option, QToolBar
 
 void QMainWindowLayout::toggleToolBarsVisible()
 {
-    layoutState.toolBarAreaLayout.visible = !layoutState.toolBarAreaLayout.visible;
-    if (!layoutState.mainWindow->isMaximized()){
-        QPoint topLeft = parentWidget()->geometry().topLeft();
-        QRect r = parentWidget()->geometry();
-        r = layoutState.toolBarAreaLayout.rectHint(r);
-        r.moveTo(topLeft);
-        parentWidget()->setGeometry(r);
-    } else{
-        update();
+    bool updateNonUnifiedParts = true;
+#ifdef Q_WS_MAC
+    if (layoutState.mainWindow->unifiedTitleAndToolBarOnMac()) {
+        // If we hit this case, someone has pressed the "toolbar button" which will
+        // toggle the unified toolbar visiblity, because that's what the user wants.
+        // We might be in a situation where someone has hidden all the toolbars
+        // beforehand (maybe in construction), but now they've hit this button and
+        // and are expecting the items to show. What do we do?
+        // 1) Check the visibility of all the toolbars, if one is visible, do nothing, this
+        //    preserves what people would expect (these toolbars were visible when I clicked last time).
+        // 2) If NONE are visible, then show them all. Again, this preserves the user expectation
+        //    of, "I want to see the toolbars." The user may get more toolbars than expected, but this
+        //    is better seeing nothing.
+        // Don't worry about any of this if we are going invisible. This does mean we may get
+        // into issues when switching into and out of fullscreen mode, but this is probably minor.
+        // If we ever need to do hiding, that would have to be taken care of after the unified toolbar
+        // has finished hiding.
+        // People can of course handle the QEvent::ToolBarChange event themselves and do
+        // WHATEVER they want if they don't like what we are doing (though the unified toolbar
+        // will fire regardless).
+
+        // Check if we REALLY need to update the geometry below. If we only have items in the
+        // unified toolbar, all the docks will be empty, so there's very little point
+        // in doing the geometry as Apple will do it (we also avoid flicker in Cocoa as well).
+        // FWIW, layoutState.toolBarAreaLayout.visible and the state of the unified toolbar
+        // visibility can get out of sync. I really don't think it's a big issue. It is kept
+        // to a minimum because we only change the visibility if we absolutely must.
+        // update the "non unified parts."
+        updateNonUnifiedParts = !layoutState.toolBarAreaLayout.isEmpty();
+
+        // We get this function before the unified toolbar does its thing.
+        // So, the value will be opposite of what we expect.
+        bool goingVisible = !macWindowToolbarIsVisible(qt_mac_window_for(layoutState.mainWindow));
+        if (goingVisible) {
+            const int ToolBarCount = qtoolbarsInUnifiedToolbarList.size();
+            bool needAllVisible = true;
+            for (int i = 0; i < ToolBarCount; ++i) {
+                if (!qtoolbarsInUnifiedToolbarList.at(i)->isHidden()) {
+                    needAllVisible = false;
+                    break;
+                }
+            }
+            if (needAllVisible) {
+                QBoolBlocker blocker(blockVisiblityCheck);  // Disable the visibilty check because
+                                                            // the toggle has already happened.
+                for (int i = 0; i < ToolBarCount; ++i)
+                    qtoolbarsInUnifiedToolbarList.at(i)->setVisible(true);
+            }
+        }
+        if (!updateNonUnifiedParts)
+            layoutState.toolBarAreaLayout.visible = goingVisible;
+    }
+#endif
+    if (updateNonUnifiedParts) {
+        layoutState.toolBarAreaLayout.visible = !layoutState.toolBarAreaLayout.visible;
+        if (!layoutState.mainWindow->isMaximized()) {
+            QPoint topLeft = parentWidget()->geometry().topLeft();
+            QRect r = parentWidget()->geometry();
+            r = layoutState.toolBarAreaLayout.rectHint(r);
+            r.moveTo(topLeft);
+            parentWidget()->setGeometry(r);
+        } else {
+            update();
+        }
     }
 }
 
@@ -1574,9 +1629,6 @@ void QMainWindowLayout::animationFinished(QWidget *widget)
 
 #ifndef QT_NO_DOCKWIDGET
 #ifndef QT_NO_TABBAR
-        //it is important to set the current tab before applying the layout
-        //so that applyState will not try to counter the result of the animation
-        //by putting the item in negative space
         if (qobject_cast<QDockWidget*>(widget) != 0) {
             // info() might return null if the widget is destroyed while
             // animating but before the animationFinished signal is received.
@@ -1586,8 +1638,6 @@ void QMainWindowLayout::animationFinished(QWidget *widget)
 #endif
 #endif
 
-        applyState(layoutState, false);
-
         savedState.clear();
         currentGapPos.clear();
         pluggingWidget = 0;
@@ -1641,6 +1691,9 @@ QMainWindowLayout::QMainWindowLayout(QMainWindow *mainwindow)
 #ifndef QT_NO_RUBBERBAND
     , gapIndicator(new QRubberBand(QRubberBand::Rectangle, mainwindow))
 #endif //QT_NO_RUBBERBAND
+#ifdef Q_WS_MAC
+    , blockVisiblityCheck(false)
+#endif
 {
 #ifndef QT_NO_DOCKWIDGET
 #ifndef QT_NO_TABBAR
diff --git a/src/gui/widgets/qmainwindowlayout_mac.mm b/src/gui/widgets/qmainwindowlayout_mac.mm
index 6632be7..61719c2 100644
--- a/src/gui/widgets/qmainwindowlayout_mac.mm
+++ b/src/gui/widgets/qmainwindowlayout_mac.mm
@@ -338,18 +338,16 @@ void QMainWindowLayout::updateHIToolBarStatus()
                                0, kWindowUnifiedTitleAndToolbarAttribute);
     }
 #endif
-    macWindowToolbarShow(layoutState.mainWindow, useMacToolbar);
 
     layoutState.mainWindow->setUpdatesEnabled(false);  // reduces a little bit of flicker, not all though
     if (!useMacToolbar) {
-        OSWindowRef windowRef = qt_mac_window_for(parentWidget());
-        macWindowToolbarShow(parentWidget(), false);
+        macWindowToolbarShow(layoutState.mainWindow, false);
         // Move everything out of the HIToolbar into the main toolbar.
         while (!qtoolbarsInUnifiedToolbarList.isEmpty()) {
             // Should shrink the list by one every time.
             layoutState.mainWindow->addToolBar(Qt::TopToolBarArea, qtoolbarsInUnifiedToolbarList.first());
         }
-        macWindowToolbarSet(windowRef, NULL);
+        macWindowToolbarSet(qt_mac_window_for(layoutState.mainWindow), 0);
     } else {
         QList<QToolBar *> toolbars = layoutState.mainWindow->findChildren<QToolBar *>();
         for (int i = 0; i < toolbars.size(); ++i) {
@@ -359,6 +357,7 @@ void QMainWindowLayout::updateHIToolBarStatus()
                 layoutState.mainWindow->addToolBar(Qt::TopToolBarArea, toolbar);
             }
         }
+        syncUnifiedToolbarVisibility();
     }
     layoutState.mainWindow->setUpdatesEnabled(true);
 }
@@ -439,7 +438,7 @@ void QMainWindowLayout::insertIntoMacToolbar(QToolBar *before, QToolBar *toolbar
 #else
     NSString *toolbarID = kQToolBarNSToolbarIdentifier;
     toolbarID = [toolbarID stringByAppendingFormat:@"%p", toolbar];
-    cocoaItemIDToToolbarHash.insert(QCFString::toQString(CFStringRef(toolbarID)), toolbar);
+    cocoaItemIDToToolbarHash.insert(qt_mac_NSStringToQString(toolbarID), toolbar);
     [macToolbar insertItemWithItemIdentifier:toolbarID atIndex:beforeIndex];
 #endif
 }
@@ -487,6 +486,7 @@ void QMainWindowLayout::cleanUpMacToolbarItems()
 
 void QMainWindowLayout::fixSizeInUnifiedToolbar(QToolBar *tb) const
 {
+#ifdef QT_MAC_USE_COCOA
     QHash<void *, QToolBar *>::const_iterator it = unifiedToolbarHash.constBegin();
     NSToolbarItem *item = nil;
     while (it != unifiedToolbarHash.constEnd()) {
@@ -507,5 +507,26 @@ void QMainWindowLayout::fixSizeInUnifiedToolbar(QToolBar *tb) const
         nssize.height = size.height() - 2;
         [item setMinSize:nssize];
     }
+#else
+    Q_UNUSED(tb);
+#endif
 }
+
+void QMainWindowLayout::syncUnifiedToolbarVisibility()
+{
+    if (blockVisiblityCheck)
+        return;
+
+    Q_ASSERT(layoutState.mainWindow->unifiedTitleAndToolBarOnMac());
+    bool show = false;
+    const int ToolBarCount = qtoolbarsInUnifiedToolbarList.count();
+    for (int i = 0; i < ToolBarCount; ++i) {
+        if (qtoolbarsInUnifiedToolbarList.at(i)->isVisible()) {
+            show = true;
+            break;
+        }
+    }
+    macWindowToolbarShow(layoutState.mainWindow, show);
+}
+
 QT_END_NAMESPACE
diff --git a/src/gui/widgets/qmainwindowlayout_p.h b/src/gui/widgets/qmainwindowlayout_p.h
index 45f62cd..524fdbf 100644
--- a/src/gui/widgets/qmainwindowlayout_p.h
+++ b/src/gui/widgets/qmainwindowlayout_p.h
@@ -335,6 +335,8 @@ public:
     void cleanUpMacToolbarItems();
     void fixSizeInUnifiedToolbar(QToolBar *tb) const;
     bool useHIToolBar;
+    void syncUnifiedToolbarVisibility();
+    bool blockVisiblityCheck;
 #endif
 };
 QT_END_NAMESPACE
diff --git a/src/gui/widgets/qprogressbar.cpp b/src/gui/widgets/qprogressbar.cpp
index ac3338b..d168028 100644
--- a/src/gui/widgets/qprogressbar.cpp
+++ b/src/gui/widgets/qprogressbar.cpp
@@ -204,7 +204,7 @@ bool QProgressBarPrivate::repaintRequired() const
          \o A progress bar shown in the Plastique widget style.
     \endtable
 
-    \sa QTimeLine, QProgressDialog, {fowler}{GUI Design Handbook: Progress Indicator}
+    \sa QProgressDialog, {fowler}{GUI Design Handbook: Progress Indicator}
 */
 
 /*!
diff --git a/src/gui/widgets/qspinbox.cpp b/src/gui/widgets/qspinbox.cpp
index e069a21..3933272 100644
--- a/src/gui/widgets/qspinbox.cpp
+++ b/src/gui/widgets/qspinbox.cpp
@@ -50,6 +50,7 @@
 #include <qdebug.h>
 
 #include <math.h>
+#include <float.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -823,8 +824,8 @@ void QDoubleSpinBox::setRange(double minimum, double maximum)
      Sets how many decimals the spinbox will use for displaying and
      interpreting doubles.
 
-     \warning The results might not be reliable with very high values
-     for \a decimals.
+     \warning The maximum value for \a decimals is DBL_MAX_10_EXP +
+     DBL_DIG (ie. 323) because of the limitations of the double type.
 
      Note: The maximum, minimum and value might change as a result of
      changing this property.
@@ -840,7 +841,7 @@ int QDoubleSpinBox::decimals() const
 void QDoubleSpinBox::setDecimals(int decimals)
 {
     Q_D(QDoubleSpinBox);
-    d->decimals = qMax(0, decimals);
+    d->decimals = qBound(0, decimals, DBL_MAX_10_EXP + DBL_DIG);
 
     setRange(minimum(), maximum()); // make sure values are rounded
     setValue(value());
diff --git a/src/gui/widgets/qtabbar.cpp b/src/gui/widgets/qtabbar.cpp
index 11cb6a1..690e624 100644
--- a/src/gui/widgets/qtabbar.cpp
+++ b/src/gui/widgets/qtabbar.cpp
@@ -663,7 +663,7 @@ void QTabBarPrivate::refresh()
     if (pressedIndex != -1
         && movable
         && QApplication::mouseButtons() == Qt::NoButton) {
-        _q_moveTabFinished(pressedIndex);
+        moveTabFinished(pressedIndex);
         if (!validIndex(pressedIndex))
             pressedIndex = -1;
     }
@@ -1662,26 +1662,17 @@ void QTabBarPrivate::slide(int from, int to)
     q->setUpdatesEnabled(true);
     int postLocation = vertical ? q->tabRect(to).y() : q->tabRect(to).x();
     int length = postLocation - preLocation;
-    tabList[to].makeTimeLine(q);
-    tabList[to].dragOffset += -1 * length;
-    tabList[to].timeLine->setFrameRange(tabList[to].dragOffset, 0);
-    animations[tabList[to].timeLine] = to;
-    tabList[to].timeLine->setDuration(ANIMATION_DURATION);
-    if (tabList[to].timeLine->state() != QTimeLine::Running)
-        tabList[to].timeLine->start();
+    tabList[to].dragOffset -= length;
+    tabList[to].startAnimation(this, ANIMATION_DURATION);
 }
 
-void QTabBarPrivate::_q_moveTab(int offset)
+void QTabBarPrivate::moveTab(int index, int offset)
 {
-    Q_Q(QTabBar);
-    if (QTimeLine *timeLine = qobject_cast<QTimeLine *>(q->sender())) {
-        int index = animations[timeLine];
-        if (!validIndex(index))
-            return;
-        tabList[index].dragOffset = offset;
-        layoutTab(index); // Make buttons follow tab
-        q->update();
-    }
+    if (!validIndex(index))
+        return;
+    tabList[index].dragOffset = offset;
+    layoutTab(index); // Make buttons follow tab
+    q_func()->update();
 }
 
 /*!\reimp
@@ -1695,7 +1686,7 @@ void QTabBar::mousePressEvent(QMouseEvent *event)
     }
     // Be safe!
     if (d->pressedIndex != -1 && d->movable)
-        d->_q_moveTabFinished(d->pressedIndex);
+        d->moveTabFinished(d->pressedIndex);
 
     d->pressedIndex = d->indexAtPos(event->pos());
     if (d->validIndex(d->pressedIndex)) {
@@ -1721,7 +1712,7 @@ void QTabBar::mouseMoveEvent(QMouseEvent *event)
         // Be safe!
         if (d->pressedIndex != -1
             && event->buttons() == Qt::NoButton)
-            d->_q_moveTabFinished(d->pressedIndex);
+            d->moveTabFinished(d->pressedIndex);
         
         // Start drag
         if (!d->dragInProgress && d->pressedIndex != -1) {
@@ -1789,16 +1780,6 @@ void QTabBar::mouseMoveEvent(QMouseEvent *event)
     optTabBase.documentMode = d->documentMode;
 }
 
-void QTabBarPrivate::_q_moveTabFinished()
-{
-    Q_Q(QTabBar);
-    if (QTimeLine *timeLine = qobject_cast<QTimeLine *>(q->sender())) {
-        int index = animations[timeLine];
-        animations.remove(timeLine);
-        _q_moveTabFinished(index);
-    }
-}
-
 void QTabBarPrivate::setupMovableTab()
 {
     Q_Q(QTabBar);
@@ -1838,11 +1819,19 @@ void QTabBarPrivate::setupMovableTab()
     movingTab->setVisible(true);
 }
 
-void QTabBarPrivate::_q_moveTabFinished(int index)
+void QTabBarPrivate::moveTabFinished(int index)
 {
     Q_Q(QTabBar);
     bool cleanup = (pressedIndex == index) || (pressedIndex == -1) || !validIndex(index);
-    if (animations.isEmpty() && cleanup) {
+    bool allAnimationsFinished = true;
+#ifndef QT_NO_ANIMATION
+    for(int i = 0; allAnimationsFinished && i < tabList.count(); ++i) {
+        const Tab &t = tabList.at(i);
+        if (t.animation && t.animation->state() == QAbstractAnimation::Running)
+            allAnimationsFinished = false;
+    }
+#endif //QT_NO_ANIMATION
+    if (allAnimationsFinished && cleanup) {
         movingTab->setVisible(false); // We might not get a mouse release
         for (int i = 0; i < tabList.count(); ++i) {
             tabList[i].dragOffset = 0;
@@ -1877,17 +1866,8 @@ void QTabBar::mouseReleaseEvent(QMouseEvent *event)
             ? tabRect(d->pressedIndex).height()
             : tabRect(d->pressedIndex).width();
         int duration = qMin(ANIMATION_DURATION,
-                ((length < 0 ? (-1 * length) : length) * ANIMATION_DURATION) / width);
-        if (duration > 0) {
-            d->tabList[d->pressedIndex].makeTimeLine(this);
-            d->tabList[d->pressedIndex].timeLine->setFrameRange(length, 0);
-            d->animations[d->tabList[d->pressedIndex].timeLine] = d->pressedIndex;
-            d->tabList[d->pressedIndex].timeLine->setDuration(duration);
-            if (d->tabList[d->pressedIndex].timeLine->state() != QTimeLine::Running)
-                d->tabList[d->pressedIndex].timeLine->start();
-        } else {
-            d->_q_moveTabFinished(d->pressedIndex);
-        }
+                (qAbs(length) * ANIMATION_DURATION) / width);
+        d->tabList[d->pressedIndex].startAnimation(d, duration);
         d->dragInProgress = false;
         d->movingTab->setVisible(false);
         d->dragStartPosition = QPoint();
diff --git a/src/gui/widgets/qtabbar.h b/src/gui/widgets/qtabbar.h
index 7514486..402f54b 100644
--- a/src/gui/widgets/qtabbar.h
+++ b/src/gui/widgets/qtabbar.h
@@ -215,8 +215,6 @@ private:
     Q_DECLARE_PRIVATE(QTabBar)
     Q_PRIVATE_SLOT(d_func(), void _q_scrollTabs())
     Q_PRIVATE_SLOT(d_func(), void _q_closeTab())
-    Q_PRIVATE_SLOT(d_func(), void _q_moveTab(int))
-    Q_PRIVATE_SLOT(d_func(), void _q_moveTabFinished())
 };
 
 #endif // QT_NO_TABBAR
diff --git a/src/gui/widgets/qtabbar_p.h b/src/gui/widgets/qtabbar_p.h
index dbae055..b9b9fba 100644
--- a/src/gui/widgets/qtabbar_p.h
+++ b/src/gui/widgets/qtabbar_p.h
@@ -58,9 +58,8 @@
 
 #include <qicon.h>
 #include <qtoolbutton.h>
-#include <qtimeline.h>
-#include <qhash.h>
 #include <qdebug.h>
+#include <qvariantanimation.h>
 
 #ifndef QT_NO_TABBAR
 
@@ -75,9 +74,10 @@ class QTabBarPrivate  : public QWidgetPrivate
     Q_DECLARE_PUBLIC(QTabBar)
 public:
     QTabBarPrivate()
-        :currentIndex(-1), pressedIndex(-1),
-         shape(QTabBar::RoundedNorth),
-         layoutDirty(false), drawBase(true), scrollOffset(0), expanding(true), closeButtonOnTabs(false), selectionBehaviorOnRemove(QTabBar::SelectRightTab), paintWithOffsets(true), movable(false), dragInProgress(false), documentMode(false), movingTab(0) {}
+        :currentIndex(-1), pressedIndex(-1), shape(QTabBar::RoundedNorth), layoutDirty(false),
+        drawBase(true), scrollOffset(0), expanding(true), closeButtonOnTabs(false),
+        selectionBehaviorOnRemove(QTabBar::SelectRightTab), paintWithOffsets(true), movable(false),
+        dragInProgress(false), documentMode(false), movingTab(0) {}
 
     int currentIndex;
     int pressedIndex;
@@ -88,16 +88,13 @@ public:
 
     struct Tab {
         inline Tab(const QIcon &ico, const QString &txt)
-            : enabled(true)
-            , shortcutId(0)
-            , text(txt)
-            , icon(ico)
-            , leftWidget(0)
-            , rightWidget(0)
-            , lastTab(-1)
-            , timeLine(0)
-            , dragOffset(0)
+            : enabled(true) , shortcutId(0), text(txt), icon(ico),
+            leftWidget(0), rightWidget(0), lastTab(-1), dragOffset(0)
+#ifndef QT_NO_ANIMATION
+            , animation(0)
+#endif //QT_NO_ANIMATION
         {}
+        bool operator==(const Tab &other) const { return &other == this; }
         bool enabled;
         int shortcutId;
         QString text;
@@ -117,21 +114,39 @@ public:
         QWidget *leftWidget;
         QWidget *rightWidget;
         int lastTab;
-
-        QTimeLine *timeLine;
         int dragOffset;
 
-        void makeTimeLine(QWidget *q) {
-            if (timeLine)
-                return;
-            timeLine = new QTimeLine(ANIMATION_DURATION, q);
-            q->connect(timeLine, SIGNAL(frameChanged(int)), q, SLOT(_q_moveTab(int)));
-            q->connect(timeLine, SIGNAL(finished()), q, SLOT(_q_moveTabFinished()));
+#ifndef QT_NO_ANIMATION
+        ~Tab() { delete animation; }
+        struct TabBarAnimation : public QVariantAnimation {
+            TabBarAnimation(Tab *t, QTabBarPrivate *_priv) : tab(t), priv(_priv)
+            { setEasingCurve(QEasingCurve::InOutQuad); }
+
+            void updateCurrentValue(const QVariant &current)
+            { priv->moveTab(priv->tabList.indexOf(*tab), current.toInt()); }
+
+            void updateState(State, State newState)
+            { if (newState == Stopped) priv->moveTabFinished(priv->tabList.indexOf(*tab)); }
+        private:
+            //these are needed for the callbacks
+            Tab *tab;
+            QTabBarPrivate *priv;
+        } *animation;
+
+        void startAnimation(QTabBarPrivate *priv, int duration) {
+            if (!animation)
+                animation = new TabBarAnimation(this, priv);
+            animation->setStartValue(dragOffset);
+            animation->setEndValue(0);
+            animation->setDuration(duration);
+            animation->start();
         }
-
+#else
+        void startAnimation(QTabBarPrivate *priv, int duration)
+        { Q_UNUSED(duration); priv->moveTabFinished(priv->tabList.indexOf(*this)); }
+#endif //QT_NO_ANIMATION
     };
     QList<Tab> tabList;
-    QHash<QTimeLine*, int> animations;
 
     int calculateNewPosition(int from, int to, int index) const;
     void slide(int from, int to);
@@ -152,9 +167,8 @@ public:
 
     void _q_scrollTabs();
     void _q_closeTab();
-    void _q_moveTab(int);
-    void _q_moveTabFinished();
-    void _q_moveTabFinished(int offset);
+    void moveTab(int index, int offset);
+    void moveTabFinished(int index);
     QRect hoverRect;
 
     void refresh();
diff --git a/src/gui/widgets/qtoolbar.cpp b/src/gui/widgets/qtoolbar.cpp
index b249915..b65f1ba 100644
--- a/src/gui/widgets/qtoolbar.cpp
+++ b/src/gui/widgets/qtoolbar.cpp
@@ -1074,6 +1074,15 @@ static bool waitForPopup(QToolBar *tb, QWidget *popup)
     return false;
 }
 
+#if defined(Q_WS_MAC)
+static bool toolbarInUnifiedToolBar(QToolBar *toolbar)
+{
+    const QMainWindow *mainWindow = qobject_cast<const QMainWindow *>(toolbar->parentWidget());
+    return mainWindow && mainWindow->unifiedTitleAndToolBarOnMac()
+            && mainWindow->toolBarArea(toolbar) == Qt::TopToolBarArea;
+}
+#endif
+
 /*! \reimp */
 bool QToolBar::event(QEvent *event)
 {
@@ -1096,7 +1105,15 @@ bool QToolBar::event(QEvent *event)
         // fallthrough intended
     case QEvent::Show:
         d->toggleViewAction->setChecked(event->type() == QEvent::Show);
-#if defined(Q_WS_MAC) && !defined(QT_MAC_USE_COCOA)
+#if defined(Q_WS_MAC)
+        if (toolbarInUnifiedToolBar(this)) {
+             // I can static_cast because I did the qobject_cast in the if above, therefore
+            // we must have a QMainWindowLayout here.
+            QMainWindowLayout *mwLayout = static_cast<QMainWindowLayout *>(parentWidget()->layout());
+            mwLayout->fixSizeInUnifiedToolbar(this);
+            mwLayout->syncUnifiedToolbarVisibility();
+        }
+#  if !defined(QT_MAC_USE_COCOA)
         // Fall through
     case QEvent::LayoutRequest: {
         // There's currently no way to invalidate the size and let
@@ -1111,10 +1128,9 @@ bool QToolBar::event(QEvent *event)
             }
 
             if (needUpdate) {
-                OSWindowRef windowRef = qt_mac_window_for(this);
-                if (mainWindow->unifiedTitleAndToolBarOnMac()
-                        && mainWindow->toolBarArea(this) == Qt::TopToolBarArea
-                        && macWindowToolbarVisible(windowRef))   {
+                OSWindowRef windowRef = qt_mac_window_for(mainWindow);
+                if (toolbarInUnifiedToolBar(this)
+                        && macWindowToolbarIsVisible(windowRef))   {
                     DisableScreenUpdates();
                     macWindowToolbarShow(this, false);
                     macWindowToolbarShow(this, true);
@@ -1126,7 +1142,8 @@ bool QToolBar::event(QEvent *event)
                 return earlyResult;
         }
     }
-#endif
+#  endif // !QT_MAC_USE_COCOA
+#endif // Q_WS_MAC
         break;
     case QEvent::ParentChange:
         d->layout->checkUsePopupMenu();
diff --git a/src/gui/widgets/qwidgetanimator.cpp b/src/gui/widgets/qwidgetanimator.cpp
index 26cf905..1a93b51 100644
--- a/src/gui/widgets/qwidgetanimator.cpp
+++ b/src/gui/widgets/qwidgetanimator.cpp
@@ -100,7 +100,6 @@ void QWidgetAnimator::animate(QWidget *widget, const QRect &_final_geometry, boo
     m_animation_map[widget] = anim;
     connect(anim, SIGNAL(finished()), SLOT(animationFinished()));
     anim->start(QPropertyAnimation::DeleteWhenStopped);
-    Q_ASSERT(animate || widget->geometry() == final_geometry);
 #else
     //we do it in one shot
     widget->setGeometry(final_geometry);
diff --git a/src/gui/widgets/qwidgetanimator_p.h b/src/gui/widgets/qwidgetanimator_p.h
index 64697a9..5a3e39d 100644
--- a/src/gui/widgets/qwidgetanimator_p.h
+++ b/src/gui/widgets/qwidgetanimator_p.h
@@ -61,6 +61,7 @@ QT_BEGIN_NAMESPACE
 class QWidget;
 class QMainWindowLayout;
 class QPropertyAnimation;
+class QRect;
 
 class QWidgetAnimator : public QObject
 {
diff --git a/src/network/access/qhttpnetworkreply.cpp b/src/network/access/qhttpnetworkreply.cpp
index 483589b..7a616aa 100644
--- a/src/network/access/qhttpnetworkreply.cpp
+++ b/src/network/access/qhttpnetworkreply.cpp
@@ -201,6 +201,7 @@ bool QHttpNetworkReply::isFinished() const
 QHttpNetworkReplyPrivate::QHttpNetworkReplyPrivate(const QUrl &newUrl)
     : QHttpNetworkHeaderPrivate(newUrl), state(NothingDoneState), statusCode(100),
       majorVersion(0), minorVersion(0), bodyLength(0), contentRead(0), totalProgress(0),
+      chunkedTransferEncoding(0),
       currentChunkSize(0), currentChunkRead(0), connection(0), initInflate(false),
       autoDecompress(false), responseData(0), requestIsPrepared(false)
 {
@@ -506,6 +507,9 @@ qint64 QHttpNetworkReplyPrivate::readHeader(QAbstractSocket *socket)
         state = ReadingDataState;
         fragment.clear(); // next fragment
         bodyLength = contentLength(); // cache the length
+
+        // cache isChunked() since it is called often
+        chunkedTransferEncoding = headerField("transfer-encoding").toLower().contains("chunked");
     }
     return bytes;
 }
@@ -546,7 +550,7 @@ void QHttpNetworkReplyPrivate::parseHeader(const QByteArray &header)
 
 bool QHttpNetworkReplyPrivate::isChunked()
 {
-    return headerField("transfer-encoding").toLower().contains("chunked");
+    return chunkedTransferEncoding;
 }
 
 bool QHttpNetworkReplyPrivate::connectionCloseEnabled()
diff --git a/src/network/access/qhttpnetworkreply_p.h b/src/network/access/qhttpnetworkreply_p.h
index b86cfaa..5eb70ce 100644
--- a/src/network/access/qhttpnetworkreply_p.h
+++ b/src/network/access/qhttpnetworkreply_p.h
@@ -198,6 +198,7 @@ public:
     qint64 contentRead;
     qint64 totalProgress;
     QByteArray fragment; // used for header, status, chunk header etc, not for reply data
+    bool chunkedTransferEncoding;
     qint64 currentChunkSize;
     qint64 currentChunkRead;
     QPointer<QHttpNetworkConnection> connection;
diff --git a/src/network/access/qnetworkreplyimpl.cpp b/src/network/access/qnetworkreplyimpl.cpp
index de39970..28319bb 100644
--- a/src/network/access/qnetworkreplyimpl.cpp
+++ b/src/network/access/qnetworkreplyimpl.cpp
@@ -461,8 +461,8 @@ void QNetworkReplyImplPrivate::appendDownstreamData(QIODevice *data)
 void QNetworkReplyImplPrivate::finished()
 {
     Q_Q(QNetworkReplyImpl);
-    Q_ASSERT_X(state != Finished, "QNetworkReplyImpl",
-               "Backend called finished/finishedWithError more than once");
+    if (state == Finished || state == Aborted)
+        return;
 
     state = Finished;
     pendingNotifications.clear();
diff --git a/src/network/kernel/qnetworkproxy.cpp b/src/network/kernel/qnetworkproxy.cpp
index 1d968c2..608db65 100644
--- a/src/network/kernel/qnetworkproxy.cpp
+++ b/src/network/kernel/qnetworkproxy.cpp
@@ -366,7 +366,7 @@ static QNetworkProxy::Capabilities defaultCapabilitiesForType(QNetworkProxy::Pro
          int(QNetworkProxy::HostNameLookupCapability)),
     };
 
-    if (int(type) < 0 && int(type) > int(QNetworkProxy::FtpCachingProxy))
+    if (int(type) < 0 || int(type) > int(QNetworkProxy::FtpCachingProxy))
         type = QNetworkProxy::DefaultProxy;
     return QNetworkProxy::Capabilities(defaults[int(type)]);
 }
diff --git a/src/network/socket/qlocalsocket_win.cpp b/src/network/socket/qlocalsocket_win.cpp
index 1a971f0..794b2b7 100644
--- a/src/network/socket/qlocalsocket_win.cpp
+++ b/src/network/socket/qlocalsocket_win.cpp
@@ -168,7 +168,7 @@ void QLocalSocket::connectToServer(const QString &name, OpenMode openMode)
 
     // we have a valid handle
     d->serverName = name;
-    if (setSocketDescriptor((quintptr)localSocket), openMode) {
+    if (setSocketDescriptor((quintptr)localSocket, ConnectedState, openMode)) {
         d->handle = localSocket;
         emit connected();
     }
@@ -299,8 +299,6 @@ void QLocalSocket::abort()
 DWORD QLocalSocketPrivate::bytesAvailable()
 {
     Q_Q(QLocalSocket);
-    if (q->state() != QLocalSocket::ConnectedState)
-        return 0;
     DWORD bytes;
     if (PeekNamedPipe(handle, NULL, 0, NULL, &bytes, NULL)) {
         return bytes;
@@ -410,7 +408,7 @@ bool QLocalSocket::setSocketDescriptor(quintptr socketDescriptor,
     d->handle = (int*)socketDescriptor;
     d->state = socketState;
     emit stateChanged(d->state);
-    if (d->state == ConnectedState) {
+    if (d->state == ConnectedState && openMode.testFlag(QIODevice::ReadOnly)) {
         d->startAsyncRead();
         d->checkReadyRead();
     }
@@ -471,6 +469,10 @@ bool QLocalSocket::waitForDisconnected(int msecs)
     Q_D(QLocalSocket);
     if (state() == UnconnectedState)
         return false;
+    if (!openMode().testFlag(QIODevice::ReadOnly)) {
+        qWarning("QLocalSocket::waitForDisconnected isn't supported for write only pipes.");
+        return false;
+    }
     QIncrementalSleepTimer timer(msecs);
     forever {
         d->bytesAvailable();    // to check if PeekNamedPipe fails
diff --git a/src/plugins/gfxdrivers/directfb/qdirectfbpaintengine.cpp b/src/plugins/gfxdrivers/directfb/qdirectfbpaintengine.cpp
index 096bf40..4928b67 100644
--- a/src/plugins/gfxdrivers/directfb/qdirectfbpaintengine.cpp
+++ b/src/plugins/gfxdrivers/directfb/qdirectfbpaintengine.cpp
@@ -81,7 +81,7 @@ template <> inline const bool* ptr<bool>(const bool &) { return 0; }
 template <typename device, typename T1, typename T2, typename T3>
 static void rasterFallbackWarn(const char *msg, const char *func, const device *dev,
                                int scale, bool matrixRotShear, bool simplePen,
-                               bool dfbHandledClip,
+                               bool dfbHandledClip, bool unsupportedCompositionMode,
                                const char *nameOne, const T1 &one,
                                const char *nameTwo, const T2 &two,
                                const char *nameThree, const T3 &three)
@@ -98,7 +98,8 @@ static void rasterFallbackWarn(const char *msg, const char *func, const device *
     dbg << "scale" << scale
         << "matrixRotShear" << matrixRotShear
         << "simplePen" << simplePen
-        << "dfbHandledClip" << dfbHandledClip;
+        << "dfbHandledClip" << dfbHandledClip
+        << "unsupportedCompositionMode" << unsupportedCompositionMode;
 
     const T1 *t1 = ptr(one);
     const T2 *t2 = ptr(two);
@@ -124,6 +125,7 @@ static void rasterFallbackWarn(const char *msg, const char *func, const device *
                            __FUNCTION__, state()->painter->device(),    \
                            d_func()->scale, d_func()->matrixRotShear, \
                            d_func()->simplePen, d_func()->dfbCanHandleClip(), \
+                           d_func()->unsupportedCompositionMode, \
                            #one, one, #two, two, #three, three);        \
     if (op & (QT_DIRECTFB_DISABLE_RASTERFALLBACKS))                     \
         return;
@@ -138,6 +140,7 @@ static void rasterFallbackWarn(const char *msg, const char *func, const device *
                            __FUNCTION__, state()->painter->device(),    \
                            d_func()->scale, d_func()->matrixRotShear, \
                            d_func()->simplePen, d_func()->dfbCanHandleClip(), \
+                           d_func()->unsupportedCompositionMode, \
                            #one, one, #two, two, #three, three);
 #else
 #define RASTERFALLBACK(op, one, two, three)
@@ -238,7 +241,7 @@ public:
     void fillRects(const QRectF *rects, int count);
     void drawRects(const QRectF *rects, int count);
 
-    void drawTiledPixmap(const QRectF &dest, const QPixmap &pixmap);
+    void drawTiledPixmap(const QRectF &dest, const QPixmap &pixmap, const QPointF &pos);
     void blit(const QRectF &dest, IDirectFBSurface *surface, const QRectF &src);
 
     inline void updateClip();
@@ -281,6 +284,7 @@ private:
     bool unsupportedCompositionMode;
 
     QDirectFBPaintEngine *q;
+    QRect currentClip;
     friend class QDirectFBPaintEngine;
 };
 
@@ -340,6 +344,7 @@ bool QDirectFBPaintEngine::end()
 #if (Q_DIRECTFB_VERSION >= 0x010000)
     d->surface->ReleaseSource(d->surface);
 #endif
+    d->currentClip = QRect();
     d->surface->SetClip(d->surface, NULL);
     d->surface = 0;
     return QRasterPaintEngine::end();
@@ -610,30 +615,26 @@ void QDirectFBPaintEngine::drawPixmap(const QPointF &p, const QPixmap &pm)
 
 void QDirectFBPaintEngine::drawTiledPixmap(const QRectF &r,
                                            const QPixmap &pixmap,
-                                           const QPointF &sp)
+                                           const QPointF &offset)
 {
     Q_D(QDirectFBPaintEngine);
     d->updateClip();
     if (pixmap.pixmapData()->classId() != QPixmapData::DirectFBClass) {
-        RASTERFALLBACK(DRAW_TILED_PIXMAP, r, pixmap.size(), sp);
+        RASTERFALLBACK(DRAW_TILED_PIXMAP, r, pixmap.size(), offset);
         d->lock();
-        QRasterPaintEngine::drawTiledPixmap(r, pixmap, sp);
-    } else if (d->unsupportedCompositionMode || !d->dfbCanHandleClip(r) || d->matrixRotShear || !sp.isNull()
+        QRasterPaintEngine::drawTiledPixmap(r, pixmap, offset);
+    } else if (d->unsupportedCompositionMode || !d->dfbCanHandleClip(r) || d->matrixRotShear
                || d->scale == QDirectFBPaintEnginePrivate::NegativeScale) {
-        RASTERFALLBACK(DRAW_TILED_PIXMAP, r, pixmap.size(), sp);
+        RASTERFALLBACK(DRAW_TILED_PIXMAP, r, pixmap.size(), offset);
         const QImage *img = static_cast<QDirectFBPixmapData*>(pixmap.pixmapData())->buffer(DSLF_READ);
         d->lock();
         QRasterPixmapData *data = new QRasterPixmapData(QPixmapData::PixmapType);
         data->fromImage(*img, Qt::AutoColor);
         const QPixmap pix(data);
-        QRasterPaintEngine::drawTiledPixmap(r, pix, sp);
+        QRasterPaintEngine::drawTiledPixmap(r, pix, offset);
     } else {
         d->unlock();
-        QPixmapData *data = pixmap.pixmapData();
-        Q_ASSERT(data->classId() == QPixmapData::DirectFBClass);
-        QDirectFBPixmapData *dfbData = static_cast<QDirectFBPixmapData*>(data);
-        dfbData->unlockDirectFB();
-        d->drawTiledPixmap(r, pixmap);
+        d->drawTiledPixmap(r, pixmap, offset);
     }
 }
 
@@ -730,14 +731,17 @@ void QDirectFBPaintEngine::fillRect(const QRectF &rect, const QBrush &brush)
             d->surface->FillRectangle(d->surface, r.x(), r.y(),
                                       r.width(), r.height());
             return; }
-        case Qt::TexturePattern:
-            if (state()->brushOrigin == QPointF() && brush.transform().isIdentity()) {
-                //could handle certain types of brush.transform() E.g. scale
-                d->unlock();
-                d->drawTiledPixmap(rect, brush.texture());
-                return;
-            }
-            break;
+        case Qt::TexturePattern: {
+            if (d->scale == QDirectFBPaintEnginePrivate::NegativeScale)
+                break;
+
+            const QPixmap texture = brush.texture();
+            if (texture.pixmapData()->classId() != QPixmapData::DirectFBClass)
+                break;
+
+            d->unlock();
+            d->drawTiledPixmap(rect, texture, rect.topLeft() - state()->brushOrigin);
+            return; }
         default:
             break;
         }
@@ -1059,6 +1063,8 @@ void QDirectFBPaintEnginePrivate::blit(const QRectF &dest, IDirectFBSurface *s,
 {
     const QRect sr = src.toRect();
     const QRect dr = transform.mapRect(dest).toRect();
+    if (dr.isEmpty())
+        return;
     const DFBRectangle sRect = { sr.x(), sr.y(), sr.width(), sr.height() };
     DFBResult result;
 
@@ -1072,55 +1078,105 @@ void QDirectFBPaintEnginePrivate::blit(const QRectF &dest, IDirectFBSurface *s,
         DirectFBError("QDirectFBPaintEngine::drawPixmap()", result);
 }
 
-void QDirectFBPaintEnginePrivate::drawTiledPixmap(const QRectF &dest,
-                                                  const QPixmap &pixmap)
+static inline qreal fixCoord(qreal rect_pos, qreal pixmapSize, qreal offset)
 {
+    qreal pos = rect_pos - offset;
+    while (pos > rect_pos)
+        pos -= pixmapSize;
+    while (pos + pixmapSize < rect_pos)
+        pos += pixmapSize;
+    return pos;
+}
+
+void QDirectFBPaintEnginePrivate::drawTiledPixmap(const QRectF &dest, const QPixmap &pixmap, const QPointF &off)
+{
+    Q_ASSERT(!dirtyClip);
+    const QRect destinationRect = transform.mapRect(dest).toRect().normalized();
+    QRect newClip = destinationRect;
+    if (!currentClip.isEmpty())
+        newClip &= currentClip;
+
+    if (newClip.isNull())
+        return;
+
+    const DFBRegion clip = {
+        newClip.x(),
+        newClip.y(),
+        newClip.x() + newClip.width() - 1,
+        newClip.y() + newClip.height() - 1
+    };
+    surface->SetClip(surface, &clip);
+
+    QPointF offset = off;
+    Q_ASSERT(transform.type() <= QTransform::TxScale);
     prepareForBlit(pixmap.hasAlphaChannel());
     QPixmapData *data = pixmap.pixmapData();
     Q_ASSERT(data->classId() == QPixmapData::DirectFBClass);
     QDirectFBPixmapData *dfbData = static_cast<QDirectFBPixmapData*>(data);
-    IDirectFBSurface *s = dfbData->directFBSurface();
-    const QRect dr = transform.mapRect(dest).toRect();
-    DFBResult result = DFB_OK;
-
-    if (scale == NoScale && dr == QRect(0, 0, fbWidth, fbHeight)) {
-        result = surface->TileBlit(surface, s, 0, 0, 0);
-    } else if (scale == NoScale) {
-        const int dx = pixmap.width();
-        const int dy = pixmap.height();
-        const DFBRectangle rect = { 0, 0, dx, dy };
-        QVarLengthArray<DFBRectangle> rects;
-        QVarLengthArray<DFBPoint> points;
-
-        for (int y = dr.y(); y <= dr.bottom(); y += dy) {
-            for (int x = dr.x(); x <= dr.right(); x += dx) {
-                rects.append(rect);
-                const DFBPoint point = { x, y };
-                points.append(point);
+    dfbData->unlockDirectFB();
+    const QSize pixmapSize = dfbData->size();
+    IDirectFBSurface *sourceSurface = dfbData->directFBSurface();
+    if (transform.isScaling()) {
+        Q_ASSERT(qMin(transform.m11(), transform.m22()) >= 0);
+        offset.rx() *= transform.m11();
+        offset.ry() *= transform.m22();
+
+        const QSizeF mappedSize(pixmapSize.width() * transform.m11(), pixmapSize.height() * transform.m22());
+        qreal y = ::fixCoord(destinationRect.y(), mappedSize.height(), offset.y());
+        const qreal startX = ::fixCoord(destinationRect.x(), mappedSize.width(), offset.x());
+        while (y < destinationRect.bottom()) {
+            qreal x = startX;
+            while (x < destinationRect.right()) {
+                const DFBRectangle destination = { qRound(x), qRound(y), mappedSize.width(), mappedSize.height() };
+                surface->StretchBlit(surface, sourceSurface, 0, &destination);
+                x += mappedSize.width();
             }
+            y += mappedSize.height();
         }
-        result = surface->BatchBlit(surface, s, rects.constData(),
-                                    points.constData(), points.size());
     } else {
-        const QRect sr = transform.mapRect(QRect(0, 0, pixmap.width(), pixmap.height()));
-        const int dx = sr.width();
-        const int dy = sr.height();
-        const DFBRectangle sRect = { 0, 0, dx, dy };
-
-        for (int y = dr.y(); y <= dr.bottom(); y += dy) {
-            for (int x = dr.x(); x <= dr.right(); x += dx) {
-                const DFBRectangle dRect = { x, y, dx, dy };
-                result = surface->StretchBlit(surface, s, &sRect, &dRect);
-                if (result != DFB_OK) {
-                    y = dr.bottom() + 1;
-                    break;
-                }
+        qreal y = ::fixCoord(destinationRect.y(), pixmapSize.height(), offset.y());
+        const qreal startX = ::fixCoord(destinationRect.x(), pixmapSize.width(), offset.x());
+        int horizontal = qMax(1, destinationRect.width() / pixmapSize.width()) + 1;
+        if (startX != destinationRect.x())
+            ++horizontal;
+        int vertical = qMax(1, destinationRect.height() / pixmapSize.height()) + 1;
+        if (y != destinationRect.y())
+            ++vertical;
+
+        const int maxCount = (vertical * horizontal);
+        QVarLengthArray<DFBRectangle, 16> sourceRects(maxCount);
+        QVarLengthArray<DFBPoint, 16> points(maxCount);
+
+        int i = 0;
+        while (y < destinationRect.bottom()) {
+            Q_ASSERT(i < maxCount);
+            qreal x = startX;
+            while (x < destinationRect.right()) {
+                points[i].x = qRound(x);
+                points[i].y = qRound(y);
+                sourceRects[i].x = 0;
+                sourceRects[i].y = 0;
+                sourceRects[i].w = int(pixmapSize.width());
+                sourceRects[i].h = int(pixmapSize.height());
+                x += pixmapSize.width();
+                ++i;
             }
+            y += pixmapSize.height();
         }
+        surface->BatchBlit(surface, sourceSurface, sourceRects.constData(), points.constData(), i);
     }
 
-    if (result != DFB_OK)
-        DirectFBError("QDirectFBPaintEngine::drawTiledPixmap()", result);
+    if (currentClip.isEmpty()) {
+        surface->SetClip(surface, 0);
+    } else {
+        const DFBRegion clip = {
+            currentClip.x(),
+            currentClip.y(),
+            currentClip.x() + currentClip.width(),
+            currentClip.y() + currentClip.height()
+        };
+        surface->SetClip(surface, &clip);
+    }
 }
 
 void QDirectFBPaintEnginePrivate::updateClip()
@@ -1128,6 +1184,7 @@ void QDirectFBPaintEnginePrivate::updateClip()
     if (!dirtyClip)
         return;
 
+    currentClip = QRect();
     const QClipData *clipData = clip();
     if (!clipData || !clipData->enabled) {
         surface->SetClip(surface, NULL);
@@ -1140,6 +1197,8 @@ void QDirectFBPaintEnginePrivate::updateClip()
             clipData->clipRect.y() + clipData->clipRect.height()
         };
         surface->SetClip(surface, &r);
+        currentClip = clipData->clipRect.normalized();
+        // ### is this guaranteed to always be normalized?
         dfbHandledClip = true;
     } else if (clipData->hasRegionClip && ignoreSystemClip && clipData->clipRegion == systemClip) {
         dfbHandledClip = true;
diff --git a/src/plugins/kbddrivers/sl5000/main.cpp b/src/plugins/kbddrivers/sl5000/main.cpp
index 4d61266..cc68747 100644
--- a/src/plugins/kbddrivers/sl5000/main.cpp
+++ b/src/plugins/kbddrivers/sl5000/main.cpp
@@ -66,10 +66,9 @@ QStringList QSL5000KbdDriver::keys() const
 QWSKeyboardHandler* QSL5000KbdDriver::create(const QString &driver,
                                              const QString &device)
 {
-    Q_UNUSED(device);
     if (driver.compare(QLatin1String("SL5000"), Qt::CaseInsensitive))
         return 0;
-    return new QWSSL5000KeyboardHandler(driver);
+    return new QWSSL5000KeyboardHandler(device);
 }
 
 Q_EXPORT_PLUGIN2(qwssl5000kbddriver, QSL5000KbdDriver)
diff --git a/src/plugins/kbddrivers/vr41xx/main.cpp b/src/plugins/kbddrivers/vr41xx/main.cpp
index 2cba1f7..c9ba4d7 100644
--- a/src/plugins/kbddrivers/vr41xx/main.cpp
+++ b/src/plugins/kbddrivers/vr41xx/main.cpp
@@ -66,10 +66,9 @@ QStringList QVr41xxKbdDriver::keys() const
 QWSKeyboardHandler* QVr41xxKbdDriver::create(const QString &driver,
                                              const QString &device)
 {
-    Q_UNUSED(device);
     if (driver.compare(QLatin1String("VR41xx"), Qt::CaseInsensitive))
         return 0;
-    return new QWSVr41xxKeyboardHandler(driver);
+    return new QWSVr41xxKeyboardHandler(device);
 }
 
 Q_EXPORT_PLUGIN2(qwsvr41xxkbddriver, QVr41xxKbdDriver)
diff --git a/src/plugins/kbddrivers/yopy/main.cpp b/src/plugins/kbddrivers/yopy/main.cpp
index bfddabe..7079d88 100644
--- a/src/plugins/kbddrivers/yopy/main.cpp
+++ b/src/plugins/kbddrivers/yopy/main.cpp
@@ -66,10 +66,9 @@ QStringList QYopyKbdDriver::keys() const
 QWSKeyboardHandler* QYopyKbdDriver::create(const QString &driver,
                                            const QString &device)
 {
-    Q_UNUSED(device);
     if (driver.compare(QLatin1String("Yopy"), Qt::CaseInsensitive))
         return 0;
-    return new QWSYopyKeyboardHandler(driver);
+    return new QWSYopyKeyboardHandler(device);
 }
 
 Q_EXPORT_PLUGIN2(qwsyopykbddriver, QYopyKbdDriver)
diff --git a/src/sql/drivers/oci/qsql_oci.cpp b/src/sql/drivers/oci/qsql_oci.cpp
index 979eeec..617f116 100644
--- a/src/sql/drivers/oci/qsql_oci.cpp
+++ b/src/sql/drivers/oci/qsql_oci.cpp
@@ -609,7 +609,7 @@ static QSqlField qFromOraInf(const OraFieldInfo &ofi)
     QSqlField f(ofi.name, ofi.type);
     f.setRequired(ofi.oraIsNull == 0);
 
-    if (ofi.type == QVariant::String)
+    if (ofi.type == QVariant::String && ofi.oraType != SQLT_NUM && ofi.oraType != SQLT_VNU)
         f.setLength(ofi.oraFieldLength);
     else
         f.setLength(ofi.oraPrecision == 0 ? 38 : int(ofi.oraPrecision));
diff --git a/src/sql/drivers/odbc/qsql_odbc.cpp b/src/sql/drivers/odbc/qsql_odbc.cpp
index 50defdf..fa9031a 100644
--- a/src/sql/drivers/odbc/qsql_odbc.cpp
+++ b/src/sql/drivers/odbc/qsql_odbc.cpp
@@ -89,7 +89,8 @@ public:
     enum DefaultCase{Lower, Mixed, Upper, Sensitive};
     QODBCDriverPrivate()
     : hEnv(0), hDbc(0), useSchema(false), disconnectCount(0), isMySqlServer(false),
-           isMSSqlServer(false), hasSQLFetchScroll(true), hasMultiResultSets(false)
+           isMSSqlServer(false), hasSQLFetchScroll(true), hasMultiResultSets(false),
+           isQuoteInitialized(false), quote(QLatin1Char('"'))
     {
         unicode = false;
     }
@@ -116,7 +117,10 @@ public:
                              QString &schema, QString &table);
     DefaultCase defaultCase() const;
     QString adjustCase(const QString&) const;
-    QChar quoteChar() const;
+    QChar quoteChar();
+private:
+    bool isQuoteInitialized;
+    QChar quote;
 };
 
 class QODBCPrivate
@@ -566,10 +570,8 @@ static int qGetODBCVersion(const QString &connOpts)
     return SQL_OV_ODBC2;
 }
 
-QChar QODBCDriverPrivate::quoteChar() const
+QChar QODBCDriverPrivate::quoteChar()
 {
-    static bool isQuoteInitialized = false;
-    static QChar quote = QChar::fromLatin1('"');
     if (!isQuoteInitialized) {
         char driverResponse[4];
         SQLSMALLINT length;
@@ -579,9 +581,9 @@ QChar QODBCDriverPrivate::quoteChar() const
                 sizeof(driverResponse),
                 &length);
         if (r == SQL_SUCCESS || r == SQL_SUCCESS_WITH_INFO) {
-            quote = QChar::fromLatin1(driverResponse[0]);
+            quote = QLatin1Char(driverResponse[0]);
         } else {
-            quote = QChar::fromLatin1('"');
+            quote = QLatin1Char('"');
         }
         isQuoteInitialized = true;
     }
diff --git a/src/sql/drivers/psql/qsql_psql.cpp b/src/sql/drivers/psql/qsql_psql.cpp
index 0c92013..c61c526 100644
--- a/src/sql/drivers/psql/qsql_psql.cpp
+++ b/src/sql/drivers/psql/qsql_psql.cpp
@@ -54,11 +54,33 @@
 #include <qstringlist.h>
 #include <qmutex.h>
 
+
 #include <libpq-fe.h>
 #include <pg_config.h>
 
 #include <stdlib.h>
 #include <math.h>
+// below code taken from an example at http://www.gnu.org/software/hello/manual/autoconf/Function-Portability.html
+#ifndef isnan
+    # define isnan(x) \
+        (sizeof (x) == sizeof (long double) ? isnan_ld (x) \
+        : sizeof (x) == sizeof (double) ? isnan_d (x) \
+        : isnan_f (x))
+    static inline int isnan_f  (float       x) { return x != x; }
+    static inline int isnan_d  (double      x) { return x != x; }
+    static inline int isnan_ld (long double x) { return x != x; }
+#endif
+
+#ifndef isinf
+    # define isinf(x) \
+        (sizeof (x) == sizeof (long double) ? isinf_ld (x) \
+        : sizeof (x) == sizeof (double) ? isinf_d (x) \
+        : isinf_f (x))
+    static inline int isinf_f  (float       x) { return isnan (x - x); }
+    static inline int isinf_d  (double      x) { return isnan (x - x); }
+    static inline int isinf_ld (long double x) { return isnan (x - x); }
+#endif
+
 
 // workaround for postgres defining their OIDs in a private header file
 #define QBOOLOID 16
@@ -601,10 +623,9 @@ static QPSQLDriver::Protocol getPSQLVersion(PGconn* connection)
 {
     QPSQLDriver::Protocol serverVersion = QPSQLDriver::Version6;
     PGresult* result = PQexec(connection, "select version()");
-    int status =  PQresultStatus(result);
+    int status = PQresultStatus(result);
     if (status == PGRES_COMMAND_OK || status == PGRES_TUPLES_OK) {
         QString val = QString::fromAscii(PQgetvalue(result, 0, 0));
-        PQclear(result);
         QRegExp rx(QLatin1String("(\\d+)\\.(\\d+)"));
         rx.setMinimal(true); // enforce non-greedy RegExp
         if (rx.indexIn(val) != -1) {
@@ -645,6 +666,7 @@ static QPSQLDriver::Protocol getPSQLVersion(PGconn* connection)
             }
         }
     }
+    PQclear(result);
 
     if (serverVersion < QPSQLDriver::Version71)
         qWarning("This version of PostgreSQL is not supported and may not work.");
@@ -1161,6 +1183,21 @@ QString QPSQLDriver::formatValue(const QSqlField &field, bool trimStrings) const
             qPQfreemem(data);
             break;
         }
+        case QVariant::Double: {
+            double val = field.value().toDouble();
+            if (isnan(val))
+                r = QLatin1String("'NaN'");
+            else {
+                int res = isinf(val);
+                if (res == 1)
+                    r = QLatin1String("'Infinity'");
+                else if (res == -1)
+                    r = QLatin1String("'-Infinity'");
+                else
+                    r = QSqlDriver::formatValue(field, trimStrings);
+            }
+            break;
+        }
         default:
             r = QSqlDriver::formatValue(field, trimStrings);
             break;
@@ -1265,15 +1302,15 @@ QStringList QPSQLDriver::subscribedToNotificationsImplementation() const
 void QPSQLDriver::_q_handleNotification(int)
 {
     PQconsumeInput(d->connection);
-    PGnotify *notify = PQnotifies(d->connection);
-    if (notify) {
-        QString name(QLatin1String(notify->relname));
 
+    PGnotify *notify = 0;
+    while((notify = PQnotifies(d->connection)) != 0) {
+        QString name(QLatin1String(notify->relname));
         if (d->seid.contains(name))
             emit notification(name);
         else
             qWarning("QPSQLDriver: received notification for '%s' which isn't subscribed to.",
-                qPrintable(name));
+                    qPrintable(name));
 
         qPQfreemem(notify);
     }
diff --git a/src/sql/models/qsqltablemodel.cpp b/src/sql/models/qsqltablemodel.cpp
index 156af26..4315a8c 100644
--- a/src/sql/models/qsqltablemodel.cpp
+++ b/src/sql/models/qsqltablemodel.cpp
@@ -205,7 +205,7 @@ bool QSqlTableModelPrivate::exec(const QString &stmt, bool prepStatement,
                 editQuery.addBindValue(rec.value(i));
         }
         for (i = 0; i < whereValues.count(); ++i) {
-            if (whereValues.isGenerated(i))
+            if (whereValues.isGenerated(i) && !whereValues.isNull(i))
                 editQuery.addBindValue(whereValues.value(i));
         }
 
@@ -538,6 +538,7 @@ bool QSqlTableModel::setData(const QModelIndex &index, const QVariant &value, in
         isOk = updateRowInTable(index.row(), d->editBuffer);
         if (isOk)
             select();
+        emit dataChanged(index, index);
         break; }
     case OnRowChange:
         if (index.row() == d->insertIndex) {
diff --git a/src/svg/qsvghandler.cpp b/src/svg/qsvghandler.cpp
index 5950fac..5f9d1dd 100644
--- a/src/svg/qsvghandler.cpp
+++ b/src/svg/qsvghandler.cpp
@@ -68,6 +68,7 @@
 
 QT_BEGIN_NAMESPACE
 
+
 double qstrtod(const char *s00, char const **se, bool *ok);
 
 static bool parsePathDataFast(const QStringRef &data, QPainterPath &path);
@@ -320,6 +321,7 @@ static qreal toDouble(const QChar *&str)
             ++str;
         }
     }
+
     temp[pos] = '\0';
 
     qreal val;
@@ -365,16 +367,24 @@ static qreal toDouble(const QChar *&str)
     return val;
 
 }
-static qreal toDouble(const QString &str)
+static qreal toDouble(const QString &str, bool *ok = NULL)
 {
     const QChar *c = str.constData();
-    return toDouble(c);
+    qreal res = toDouble(c);
+    if (ok) {
+        *ok = ((*c) == QLatin1Char('\0'));
+    }
+    return res;
 }
 
-static qreal toDouble(const QStringRef &str)
+static qreal toDouble(const QStringRef &str, bool *ok = NULL)
 {
     const QChar *c = str.constData();
-    return toDouble(c);
+    qreal res = toDouble(c);
+    if (ok) {
+        *ok = (c == (str.constData() + str.length()));
+    }
+    return res;
 }
 
 static QVector<qreal> parseNumbersList(const QChar *&str)
@@ -497,14 +507,17 @@ static bool constructColor(const QString &colorStr, const QString &opacity,
     if (!resolveColor(colorStr, color, handler))
         return false;
     if (!opacity.isEmpty()) {
-        qreal op = qMin(qreal(1.0), qMax(qreal(0.0), toDouble(opacity)));
+        bool ok = true;
+        qreal op = qMin(qreal(1.0), qMax(qreal(0.0), toDouble(opacity, &ok)));
+        if (!ok)
+            op = 1.0;
         color.setAlphaF(op);
     }
     return true;
 }
 
 static qreal parseLength(const QString &str, QSvgHandler::LengthType &type,
-                         QSvgHandler *handler)
+                         QSvgHandler *handler, bool *ok = NULL)
 {
     QString numStr = str.trimmed();
 
@@ -533,15 +546,15 @@ static qreal parseLength(const QString &str, QSvgHandler::LengthType &type,
         type = handler->defaultCoordinateSystem();
         //type = QSvgHandler::LT_OTHER;
     }
-    qreal len = toDouble(numStr);
+    qreal len = toDouble(numStr, ok);
     //qDebug()<<"len is "<<len<<", from '"<<numStr << "'";
     return len;
 }
 
-static inline qreal convertToNumber(const QString &str, QSvgHandler *handler)
+static inline qreal convertToNumber(const QString &str, QSvgHandler *handler, bool *ok = NULL)
 {
     QSvgHandler::LengthType type;
-    qreal num = parseLength(str, type, handler);
+    qreal num = parseLength(str, type, handler, ok);
     if (type == QSvgHandler::LT_PERCENT) {
         num = num/100.0;
     }
@@ -631,15 +644,32 @@ static void parseBrush(QSvgNode *node,
     QString opacity = attributes.value(QLatin1String("fill-opacity")).toString();
     QString myId = someId(attributes);
 
-    value = value.trimmed();
-    fillRule = fillRule.trimmed();
-    if (!value.isEmpty() || !fillRule.isEmpty()) {
-        Qt::FillRule f = Qt::WindingFill;
+    QSvgFillStyle *inherited =
+                static_cast<QSvgFillStyle*>(node->parent()->styleProperty(
+                                                QSvgStyleProperty::FILL));
+    QSvgFillStyle *prop = new QSvgFillStyle(QColor(Qt::black));
+
+    //fill-rule attribute handling
+    Qt::FillRule f = Qt::WindingFill;
+    if (!fillRule.isEmpty() && fillRule != QLatin1String("inherit")) {
         if (fillRule == QLatin1String("evenodd"))
             f = Qt::OddEvenFill;
+    } else if (inherited) {
+        f = inherited->fillRule();
+    }
+
+    //fill-opacity atttribute handling
+    qreal fillOpacity = 1.0;
+    if (!opacity.isEmpty() && opacity != QLatin1String("inherit")) {
+        fillOpacity = qMin(qreal(1.0), qMax(qreal(0.0), toDouble(opacity)));
+    } else if (inherited) {
+        fillOpacity = inherited->fillOpacity();
+    }
+
+    //fill attribute handling
+    if ((!value.isEmpty()) && (value != QLatin1String("inherit")) ) {
         if (value.startsWith(QLatin1String("url"))) {
             value = value.remove(0, 3);
-            QSvgFillStyle *prop = new QSvgFillStyle(0);
             QSvgStyleProperty *style = styleFromUrl(node, value);
             if (style) {
                 prop->setFillStyle(style);
@@ -648,30 +678,26 @@ static void parseBrush(QSvgNode *node,
                 prop->setGradientId(id);
                 prop->setGradientResolved(false);
             }
-            if (!opacity.isEmpty()) {
-                qreal clampedOpacity = qMin(qreal(1.0), qMax(qreal(0.0), toDouble(opacity)));
-                prop->setFillOpacity(clampedOpacity);
-            }
-            if (!fillRule.isEmpty())
-                prop->setFillRule(f);
-            node->appendStyleProperty(prop,myId);
         } else if (value != QLatin1String("none")) {
             QColor color;
-            if (constructColor(value, opacity, color, handler)) {
-                QSvgFillStyle *prop = new QSvgFillStyle(QBrush(color));
-                if (!fillRule.isEmpty())
-                    prop->setFillRule(f);
-                node->appendStyleProperty(prop, myId);
-            }
+            if (resolveColor(value, color, handler))
+                prop->setBrush(QBrush(color));
         } else {
-            QSvgFillStyle *prop = new QSvgFillStyle(QBrush(Qt::NoBrush));
-            if (!fillRule.isEmpty())
-                prop->setFillRule(f);
-            node->appendStyleProperty(prop, myId);
+            prop->setBrush(QBrush(Qt::NoBrush));
+        }
+    } else if (inherited) {
+        if (inherited->style()) {
+            prop->setFillStyle(inherited->style());
+        } else {
+            prop->setBrush(inherited->qbrush());
         }
     }
+    prop->setFillOpacity(fillOpacity);
+    prop->setFillRule(f);
+    node->appendStyleProperty(prop,myId);
 }
 
+
 static void parseQPen(QPen &pen, QSvgNode *node,
                       const QSvgAttributes &attributes,
                       QSvgHandler *handler)
@@ -3006,7 +3032,11 @@ static bool parseStopNode(QSvgStyleProperty *parent,
     QString colorStr    = attrs.value(QString(), QLatin1String("stop-color")).toString();
     QString opacityStr  = attrs.value(QString(), QLatin1String("stop-opacity")).toString();
     QColor color;
-    qreal offset = convertToNumber(offsetStr, handler);
+
+    bool ok = true;
+    qreal offset = convertToNumber(offsetStr, handler, &ok);
+    if (!ok)
+        offset = 0.0;
     if (colorStr.isEmpty()) {
         colorStr = QLatin1String("#000000");
     }
@@ -3095,12 +3125,16 @@ static QSvgNode *createSvgNode(QSvgNode *parent,
         QStringList lst = viewBoxStr.split(QLatin1Char(' '), QString::SkipEmptyParts);
         if (lst.count() != 4)
             lst = viewBoxStr.split(QLatin1Char(','), QString::SkipEmptyParts);
+        int count = lst.count();
+        while (count < 4) {
+            lst.append(QLatin1String(""));
+            count++;
+        }
         QString xStr      = lst.at(0).trimmed();
         QString yStr      = lst.at(1).trimmed();
         QString widthStr  = lst.at(2).trimmed();
         QString heightStr = lst.at(3).trimmed();
 
-
         QSvgHandler::LengthType lt;
         qreal x = parseLength(xStr, lt, handler);
         qreal y = parseLength(yStr, lt, handler);
@@ -3108,15 +3142,14 @@ static QSvgNode *createSvgNode(QSvgNode *parent,
         qreal h = parseLength(heightStr, lt, handler);
 
         node->setViewBox(QRectF(x, y, w, h));
-    } else if (width && height){
+
+    } else if (width && height) {
         if (type == QSvgHandler::LT_PT) {
             width = convertToPixels(width, false, type);
             height = convertToPixels(height, false, type);
         }
-
         node->setViewBox(QRectF(0, 0, width, height));
     }
-
     handler->setDefaultCoordinateSystem(QSvgHandler::LT_PX);
 
     return node;
diff --git a/src/svg/qsvgstyle.cpp b/src/svg/qsvgstyle.cpp
index 556201b..4c8247b 100644
--- a/src/svg/qsvgstyle.cpp
+++ b/src/svg/qsvgstyle.cpp
@@ -81,12 +81,12 @@ void QSvgQualityStyle::revert(QPainter *, QSvgExtraStates &)
 }
 
 QSvgFillStyle::QSvgFillStyle(const QBrush &brush)
-    : m_fill(brush), m_style(0), m_fillRuleSet(false), m_fillOpacitySet(false), m_gradientResolved (true)
+    : m_fill(brush), m_style(0), m_fillRuleSet(false), m_fillOpacitySet(false), m_fillRule(Qt::WindingFill), m_fillOpacity(1.0), m_gradientResolved (true)
 {
 }
 
 QSvgFillStyle::QSvgFillStyle(QSvgStyleProperty *style)
-    : m_style(style), m_fillRuleSet(false), m_fillOpacitySet(false), m_gradientResolved (true)
+    : m_style(style), m_fillRuleSet(false), m_fillOpacitySet(false), m_fillRule(Qt::WindingFill), m_fillOpacity(1.0), m_gradientResolved (true)
 {
 }
 
@@ -102,6 +102,16 @@ void QSvgFillStyle::setFillOpacity(qreal opacity)
     m_fillOpacity = opacity;
 }
 
+void QSvgFillStyle::setFillStyle(QSvgStyleProperty* style)
+{
+    m_style = style;
+}
+
+void QSvgFillStyle::setBrush(QBrush brush)
+{
+    m_fill = brush;
+}
+
 static void recursivelySetFill(QSvgNode *node, Qt::FillRule f)
 {
     if (node->type() == QSvgNode::PATH) {
diff --git a/src/svg/qsvgstyle_p.h b/src/svg/qsvgstyle_p.h
index f1d0811..ac5e109 100644
--- a/src/svg/qsvgstyle_p.h
+++ b/src/svg/qsvgstyle_p.h
@@ -224,12 +224,29 @@ public:
 
     void setFillRule(Qt::FillRule f);
     void setFillOpacity(qreal opacity);
+    void setFillStyle(QSvgStyleProperty* style);
+    void setBrush(QBrush brush);
 
     const QBrush & qbrush() const
     {
         return m_fill;
     }
 
+    qreal fillOpacity() const
+    {
+        return m_fillOpacity;
+    }
+
+    Qt::FillRule fillRule() const
+    {
+        return m_fillRule;
+    }
+
+    QSvgStyleProperty* style() const
+    {
+        return m_style;
+    }
+	
     void setGradientId(const QString &Id)
     {
         m_gradientId = Id;
@@ -240,7 +257,6 @@ public:
         return m_gradientId;
     }
 
-
     void setGradientResolved(bool resolved)
     {
         m_gradientResolved = resolved;
@@ -251,16 +267,6 @@ public:
         return m_gradientResolved;
     }
 
-    void setFillStyle(QSvgStyleProperty* style)
-    {
-        m_style = style;
-    }
-
-    void setBrush(QBrush brush)
-    {
-        m_fill = brush;
-    }
-
 private:
     // fill            v 	v 	'inherit' | <Paint.datatype>
     // fill-opacity    v 	v 	'inherit' | <OpacityValue.datatype>