Merge branch '4.6' of scm.dev.nokia.troll.no:qt/oslo-staging-2 into 4.6

27 files changed, 252 insertions, 133 deletions

diff --git a/doc/src/getting-started/installation.qdoc b/doc/src/getting-started/installation.qdoc
index 057629d..58059d1 100644
--- a/doc/src/getting-started/installation.qdoc
+++ b/doc/src/getting-started/installation.qdoc
@@ -423,7 +423,7 @@ in the \l{Qt for Windows CE Requirements} document.
         "Control Panel->System->Advanced->Environment variables" and for
         older versions by editing \c{c:\autoexec.bat}.
 
-        Make sure the enviroment variables for your compiler are set. 
+        Make sure the enviroment variables for your compiler are set.
         Visual Studio includes \c{vcvars32.bat} for that purpose - or simply
         use the "Visual Studio Command Prompt" from the Start menu.
 
@@ -530,7 +530,7 @@ in the \l{Qt for the Symbian platform Requirements} document.
 
         \snippet doc/src/snippets/code/doc_src_installation.qdoc 25
 
-        To run the demos on the emulator simply navigate to the directory of the demo 
+        To run the demos on the emulator simply navigate to the directory of the demo
         you want to see and run:
 
         \snippet doc/src/snippets/code/doc_src_installation.qdoc 27
@@ -554,7 +554,7 @@ Symbian platform,
 in the \l{Qt for the Symbian platform Requirements} document.
 
 \note \bold {This document describes how to install and configure Qt for
-the Symbian platform from scratch. 
+the Symbian platform from scratch.
 If you are using pre-built binaries, follow the instructions given in the
 \l{Installing Qt on the Symbian platform from a Binary Package} document.}
 
@@ -616,7 +616,7 @@ If you are using pre-built binaries, follow the instructions given in the
         \snippet doc/src/snippets/code/doc_src_installation.qdoc 31
         to build the tools using MinGW, and the libraries using SBSv2.
 
-        SBSv2 also known as a (\l{http://developer.symbian.org/wiki/index.php/Introduction_to_RAPTOR} {Raptor})
+        SBSv2 (also known as \l{http://developer.symbian.org/wiki/index.php/Introduction_to_RAPTOR} {Raptor})
         is a next-generation Symbian build system. SBSv2 is not officially
         supported by any of the S60 SDKs currently available from Forum Nokia.
 
@@ -641,8 +641,8 @@ If you are using pre-built binaries, follow the instructions given in the
 
         \snippet doc/src/snippets/code/doc_src_installation.qdoc 29
 
-        \note You will need to supply certificate that allows installation 
-        of binaries with "All -Tcb" capability to your device. 
+        \note You will need to supply certificate that allows installation
+        of binaries with "All -Tcb" capability to your device.
 
         Similarly, install fluidlauncher to the device:
 
@@ -651,7 +651,7 @@ If you are using pre-built binaries, follow the instructions given in the
         This will create a self-signed \c fluidlauncher_armv5_urel.sis and
         install it to your device.
 
-        To run the demos on the emulator simply navigate to the directory of the demo 
+        To run the demos on the emulator simply navigate to the directory of the demo
         you want to see and run:
 
         \snippet doc/src/snippets/code/doc_src_installation.qdoc 27
@@ -827,7 +827,7 @@ If you are using pre-built binaries, follow the instructions given in the
     when building Qt from its source code. On Debian-based GNU/Linux systems,
     for example, we recommend that you install the following development
     packages:
-    
+
     \list
     \o libfontconfig1-dev
     \o libfreetype6-dev
@@ -850,7 +850,7 @@ If you are using pre-built binaries, follow the instructions given in the
     The configure script will autodetect if OpenGL headers and libraries are
     installed on your system, and if so, it will include the QtOpenGL module
     in the Qt library.
-    
+
     If your OpenGL headers or libraries are placed in a non-standard directory,
     you may need to change the \c QMAKE_INCDIR_OPENGL and/or
     \c QMAKE_LIBDIR_OPENGL in the config file for your system.
@@ -954,7 +954,7 @@ If you are using pre-built binaries, follow the instructions given in the
 
     \table
     \header \o{1,2} Architecture \o{1,2} Compiler  \o{2,1} QtCore       \o{2,1} QtGui        \o{2,1} QtNetwork    \o{2,1} QtWebKit
-    \header                                        \o Minimal \o Normal \o Minimal \o Normal \o Minimal \o Normal \o Minimal \o Normal 
+    \header                                        \o Minimal \o Normal \o Minimal \o Normal \o Minimal \o Normal \o Minimal \o Normal
     \row    \o linux-x86-g++ \o GCC 4.2.4          \o 1.7M    \o 2.7M   \o 3.3M    \o 9.9M   \o 653K    \o 1.1M   \o N/A     \o 17M
     \row    \o linux-arm-g++ \o GCC 4.1.1          \o 1.9M    \o 3.2M   \o 4.1M    \o 11M    \o 507K    \o 1.0M   \o N/A     \o 17M
     \row    \o linux-mips-g++ (MIPS32)
@@ -984,7 +984,7 @@ If you are using pre-built binaries, follow the instructions given in the
 
     Qt for the Symbian platform requires the following software installed on your development PC:
     \list
-        \o \l{http://www.forum.nokia.com/main/resources/tools_and_sdks/carbide_cpp/}{Carbide.c++ v2.0.0 or higher}           
+        \o \l{http://www.forum.nokia.com/main/resources/tools_and_sdks/carbide_cpp/}{Carbide.c++ v2.0.0 or higher}
            \list
            \o \bold{Note:} It may be necessary to update the Carbide compiler.
               See \l{http://pepper.troll.no/s60prereleases/patches/}{here} for instructions how to check your
@@ -1006,7 +1006,7 @@ If you are using pre-built binaries, follow the instructions given in the
            \o \bold{Note:} This is not required if you are using pre-built binary package.
            \endlist
         \o Building Qt libraries requires \l{http://www.arm.com/products/DevTools/RVCT.html}{RVCT} 2.2 [build 686] or later,
-           which is not available free of charge. 
+           which is not available free of charge.
     \endlist
 
     Running Qt on real device requires the following packages to be installed on your device.
diff --git a/examples/widgets/scribble/scribblearea.cpp b/examples/widgets/scribble/scribblearea.cpp
index 6c9d8aa..2bc2a69 100644
--- a/examples/widgets/scribble/scribblearea.cpp
+++ b/examples/widgets/scribble/scribblearea.cpp
@@ -139,11 +139,12 @@ void ScribbleArea::mouseReleaseEvent(QMouseEvent *event)
 }
 
 //! [12] //! [13]
-void ScribbleArea::paintEvent(QPaintEvent * /* event */)
+void ScribbleArea::paintEvent(QPaintEvent *event)
 //! [13] //! [14]
 {
     QPainter painter(this);
-    painter.drawImage(QPoint(0, 0), image);
+    QRect dirtyRect = event->rect();
+    painter.drawImage(dirtyRect, image, dirtyRect);
 }
 //! [14]
 
diff --git a/examples/widgets/softkeys/softkeys.cpp b/examples/widgets/softkeys/softkeys.cpp
index 69b4941..d1586a5 100644
--- a/examples/widgets/softkeys/softkeys.cpp
+++ b/examples/widgets/softkeys/softkeys.cpp
@@ -66,11 +66,11 @@ MainWindow::MainWindow(QWidget *parent)
     infoLabel = new QLabel(tr(""), this);
     infoLabel->setContextMenuPolicy(Qt::NoContextMenu);
 
-    toggleButton = new QPushButton(tr("Custom softkeys"), this);
+    toggleButton = new QPushButton(tr("Custom"), this);
     toggleButton->setContextMenuPolicy(Qt::NoContextMenu);
     toggleButton->setCheckable(true);
 
-    pushButton = new QPushButton(tr("Open File Dialog"), this);
+    pushButton = new QPushButton(tr("File Dialog"), this);
     pushButton->setContextMenuPolicy(Qt::NoContextMenu);
 
     QComboBox* comboBox = new QComboBox(this);
@@ -81,12 +81,12 @@ MainWindow::MainWindow(QWidget *parent)
      << QApplication::translate("MainWindow", "Selection3", 0, QApplication::UnicodeUTF8)
     );
 
-    layout = new QVBoxLayout;
-    layout->addWidget(textEditor);
-    layout->addWidget(infoLabel);
-    layout->addWidget(toggleButton);
-    layout->addWidget(pushButton);
-    layout->addWidget(comboBox);
+    layout = new QGridLayout;
+    layout->addWidget(textEditor, 0, 0, 1, 2);
+    layout->addWidget(infoLabel, 1, 0, 1, 2);
+    layout->addWidget(toggleButton, 2, 0);
+    layout->addWidget(pushButton, 2, 1);
+    layout->addWidget(comboBox, 3, 0, 1, 2);
     central->setLayout(layout);
 
     fileMenu = menuBar()->addMenu(tr("&File"));
diff --git a/examples/widgets/softkeys/softkeys.h b/examples/widgets/softkeys/softkeys.h
index 178ae64..1372fa4 100644
--- a/examples/widgets/softkeys/softkeys.h
+++ b/examples/widgets/softkeys/softkeys.h
@@ -61,7 +61,7 @@ public:
     MainWindow(QWidget *parent = 0);
     ~MainWindow();
 private:
-    QVBoxLayout *layout;
+    QGridLayout *layout;
     QWidget *central;
     QTextEdit* textEditor;
     QLabel *infoLabel;
diff --git a/examples/xml/saxbookmarks/mainwindow.cpp b/examples/xml/saxbookmarks/mainwindow.cpp
index 49cb468..ff3cf11 100644
--- a/examples/xml/saxbookmarks/mainwindow.cpp
+++ b/examples/xml/saxbookmarks/mainwindow.cpp
@@ -67,8 +67,11 @@ MainWindow::MainWindow()
 void MainWindow::open()
 {
 #if defined(Q_OS_SYMBIAN)
-    // Always look for bookmarks on the same drive where the application is installed to.
-    QString bookmarksFolder = QCoreApplication::applicationFilePath().left(1);
+    // Look for bookmarks on the same drive where the application is installed to,
+    // if drive is not read only. QDesktopServices::DataLocation does this check,
+    // and returns writable drive.
+    QString bookmarksFolder =
+            QDesktopServices::storageLocation(QDesktopServices::DataLocation).left(1);
     bookmarksFolder.append(":/Data/qt/saxbookmarks");
     QDir::setCurrent(bookmarksFolder);
 #endif
diff --git a/src/corelib/kernel/qabstractitemmodel.cpp b/src/corelib/kernel/qabstractitemmodel.cpp
index 10a61ca..9335085 100644
--- a/src/corelib/kernel/qabstractitemmodel.cpp
+++ b/src/corelib/kernel/qabstractitemmodel.cpp
@@ -2546,9 +2546,9 @@ bool QAbstractItemModel::beginMoveRows(const QModelIndex &sourceParent, int sour
     int destinationLast = destinationChild + (sourceLast - sourceFirst);
     d->changes.push(QAbstractItemModelPrivate::Change(destinationParent, destinationChild, destinationLast));
 
-    d->itemsAboutToBeMoved(sourceParent, sourceFirst, sourceLast, destinationParent, destinationChild, Qt::Vertical);
     emit rowsAboutToBeMoved(sourceParent, sourceFirst, sourceLast, destinationParent, destinationChild);
     emit layoutAboutToBeChanged();
+    d->itemsAboutToBeMoved(sourceParent, sourceFirst, sourceLast, destinationParent, destinationChild, Qt::Vertical);
     return true;
 }
 
diff --git a/src/gui/dialogs/qfiledialog_win.cpp b/src/gui/dialogs/qfiledialog_win.cpp
index d8ae73e..0116319 100644
--- a/src/gui/dialogs/qfiledialog_win.cpp
+++ b/src/gui/dialogs/qfiledialog_win.cpp
@@ -534,7 +534,7 @@ QStringList qt_win_CID_get_open_file_names(const QFileDialogArgs &args,
     modal_widget.setParent(args.parent, Qt::Window);
     QApplicationPrivate::enterModal(&modal_widget);
     // Multiple selection is allowed only in IFileOpenDialog.
-    IFileOpenDialog *pfd;
+    IFileOpenDialog *pfd = 0;
     HRESULT hr = CoCreateInstance(CLSID_FileOpenDialog,
                                   NULL,
                                   CLSCTX_INPROC_SERVER,
@@ -607,6 +607,8 @@ QStringList qt_win_CID_get_open_file_names(const QFileDialogArgs &args,
             }
         }
     }
+    if (pfd)
+        pfd->Release();
     return result;
 }
 
diff --git a/src/gui/graphicsview/qgraphicsscene_p.h b/src/gui/graphicsview/qgraphicsscene_p.h
index a1d0496..69e4d5b 100644
--- a/src/gui/graphicsview/qgraphicsscene_p.h
+++ b/src/gui/graphicsview/qgraphicsscene_p.h
@@ -78,7 +78,7 @@ class QGraphicsSceneIndex;
 class QGraphicsView;
 class QGraphicsWidget;
 
-class QGraphicsScenePrivate : public QObjectPrivate
+class Q_AUTOTEST_EXPORT QGraphicsScenePrivate : public QObjectPrivate
 {
     Q_DECLARE_PUBLIC(QGraphicsScene)
 public:
@@ -265,6 +265,7 @@ public:
     {
         if (needSortTopLevelItems) {
             qSort(topLevelItems.begin(), topLevelItems.end(), qt_notclosestLeaf);
+            topLevelSequentialOrdering = false;
             needSortTopLevelItems = false;
         }
     }
diff --git a/src/gui/image/qimagepixmapcleanuphooks.cpp b/src/gui/image/qimagepixmapcleanuphooks.cpp
index 35322e9..650075b 100644
--- a/src/gui/image/qimagepixmapcleanuphooks.cpp
+++ b/src/gui/image/qimagepixmapcleanuphooks.cpp
@@ -55,20 +55,11 @@ Q_GUI_EXPORT _qt_pixmap_cleanup_hook_64 qt_pixmap_cleanup_hook_64 = 0;
 Q_GUI_EXPORT _qt_image_cleanup_hook qt_image_cleanup_hook = 0;
 Q_GUI_EXPORT _qt_image_cleanup_hook_64 qt_image_cleanup_hook_64 = 0;
 
-
-QImagePixmapCleanupHooks* qt_image_and_pixmap_cleanup_hooks = 0;
-
-
-QImagePixmapCleanupHooks::QImagePixmapCleanupHooks()
-{
-    qt_image_and_pixmap_cleanup_hooks = this;
-}
+Q_GLOBAL_STATIC(QImagePixmapCleanupHooks, qt_image_and_pixmap_cleanup_hooks)
 
 QImagePixmapCleanupHooks *QImagePixmapCleanupHooks::instance()
 {
-    if (!qt_image_and_pixmap_cleanup_hooks)
-        qt_image_and_pixmap_cleanup_hooks = new QImagePixmapCleanupHooks;
-    return qt_image_and_pixmap_cleanup_hooks;
+    return qt_image_and_pixmap_cleanup_hooks();
 }
 
 void QImagePixmapCleanupHooks::addPixmapModificationHook(_qt_pixmap_cleanup_hook_pm hook)
@@ -105,9 +96,8 @@ void QImagePixmapCleanupHooks::removeImageHook(_qt_image_cleanup_hook_64 hook)
 
 void QImagePixmapCleanupHooks::executePixmapModificationHooks(QPixmap* pm)
 {
-    Q_ASSERT(qt_image_and_pixmap_cleanup_hooks);
-    for (int i = 0; i < qt_image_and_pixmap_cleanup_hooks->pixmapModificationHooks.count(); ++i)
-        qt_image_and_pixmap_cleanup_hooks->pixmapModificationHooks[i](pm);
+    for (int i = 0; i < qt_image_and_pixmap_cleanup_hooks()->pixmapModificationHooks.count(); ++i)
+        qt_image_and_pixmap_cleanup_hooks()->pixmapModificationHooks[i](pm);
 
     if (qt_pixmap_cleanup_hook_64)
         qt_pixmap_cleanup_hook_64(pm->cacheKey());
@@ -115,9 +105,8 @@ void QImagePixmapCleanupHooks::executePixmapModificationHooks(QPixmap* pm)
 
 void QImagePixmapCleanupHooks::executePixmapDestructionHooks(QPixmap* pm)
 {
-    Q_ASSERT(qt_image_and_pixmap_cleanup_hooks);
-    for (int i = 0; i < qt_image_and_pixmap_cleanup_hooks->pixmapDestructionHooks.count(); ++i)
-        qt_image_and_pixmap_cleanup_hooks->pixmapDestructionHooks[i](pm);
+    for (int i = 0; i < qt_image_and_pixmap_cleanup_hooks()->pixmapDestructionHooks.count(); ++i)
+        qt_image_and_pixmap_cleanup_hooks()->pixmapDestructionHooks[i](pm);
 
     if (qt_pixmap_cleanup_hook_64)
         qt_pixmap_cleanup_hook_64(pm->cacheKey());
@@ -125,9 +114,8 @@ void QImagePixmapCleanupHooks::executePixmapDestructionHooks(QPixmap* pm)
 
 void QImagePixmapCleanupHooks::executeImageHooks(qint64 key)
 {
-    Q_ASSERT(qt_image_and_pixmap_cleanup_hooks);
-    for (int i = 0; i < qt_image_and_pixmap_cleanup_hooks->imageHooks.count(); ++i)
-        qt_image_and_pixmap_cleanup_hooks->imageHooks[i](key);
+    for (int i = 0; i < qt_image_and_pixmap_cleanup_hooks()->imageHooks.count(); ++i)
+        qt_image_and_pixmap_cleanup_hooks()->imageHooks[i](key);
 
     if (qt_image_cleanup_hook_64)
         qt_image_cleanup_hook_64(key);
diff --git a/src/gui/image/qimagepixmapcleanuphooks_p.h b/src/gui/image/qimagepixmapcleanuphooks_p.h
index 9e490d7..dfc5f28 100644
--- a/src/gui/image/qimagepixmapcleanuphooks_p.h
+++ b/src/gui/image/qimagepixmapcleanuphooks_p.h
@@ -61,13 +61,10 @@ typedef void (*_qt_image_cleanup_hook_64)(qint64);
 typedef void (*_qt_pixmap_cleanup_hook_pm)(QPixmap*);
 
 class QImagePixmapCleanupHooks;
-extern QImagePixmapCleanupHooks* qt_image_and_pixmap_cleanup_hooks;
 
 class Q_GUI_EXPORT QImagePixmapCleanupHooks
 {
 public:
-    QImagePixmapCleanupHooks();
-
     static QImagePixmapCleanupHooks *instance();
 
     static void enableCleanupHooks(const QImage &image);
diff --git a/src/gui/itemviews/qsortfilterproxymodel.cpp b/src/gui/itemviews/qsortfilterproxymodel.cpp
index f1ae3d2..fc82f30 100644
--- a/src/gui/itemviews/qsortfilterproxymodel.cpp
+++ b/src/gui/itemviews/qsortfilterproxymodel.cpp
@@ -1153,6 +1153,8 @@ void QSortFilterProxyModelPrivate::_q_sourceAboutToBeReset()
 {
     Q_Q(QSortFilterProxyModel);
     q->beginResetModel();
+    invalidatePersistentIndexes();
+    clear_mapping();
 }
 
 void QSortFilterProxyModelPrivate::_q_sourceReset()
@@ -1470,6 +1472,8 @@ void QSortFilterProxyModel::setSourceModel(QAbstractItemModel *sourceModel)
 {
     Q_D(QSortFilterProxyModel);
 
+    beginResetModel();
+
     disconnect(d->model, SIGNAL(dataChanged(QModelIndex,QModelIndex)),
                this, SLOT(_q_sourceDataChanged(QModelIndex,QModelIndex)));
 
@@ -1551,7 +1555,7 @@ void QSortFilterProxyModel::setSourceModel(QAbstractItemModel *sourceModel)
     connect(d->model, SIGNAL(modelReset()), this, SLOT(_q_sourceReset()));
 
     d->clear_mapping();
-    reset();
+    endResetModel();
     if (d->update_source_sort_column() && d->dynamic_sortfilter)
         d->sort();
 }
diff --git a/src/gui/kernel/qapplication_s60.cpp b/src/gui/kernel/qapplication_s60.cpp
index fb2bc72..89d961c 100644
--- a/src/gui/kernel/qapplication_s60.cpp
+++ b/src/gui/kernel/qapplication_s60.cpp
@@ -133,36 +133,46 @@ private:
     TTimeIntervalMicroSeconds iDuration;
 };
 
+static QS60Beep* qt_S60Beep = 0;
+
 QS60Beep::~QS60Beep()
 {
+    if (iToneUtil) {
+        switch (iState) {
+        case EBeepPlaying:
+            iToneUtil->CancelPlay();
+            break;
+        case EBeepNotPrepared:
+            iToneUtil->CancelPrepare();
+            break;
+        }
+    }
     delete iToneUtil;
 }
 
 QS60Beep* QS60Beep::NewL(TInt aFrequency, TTimeIntervalMicroSeconds aDuration)
 {
-    QS60Beep* self=new (ELeave) QS60Beep();
+    QS60Beep* self = new (ELeave) QS60Beep();
     CleanupStack::PushL(self);
     self->ConstructL(aFrequency, aDuration);
     CleanupStack::Pop();
     return self;
-};
+}
 
 void QS60Beep::ConstructL(TInt aFrequency, TTimeIntervalMicroSeconds aDuration)
 {
-    iToneUtil=CMdaAudioToneUtility::NewL(*this);
-    iState=EBeepNotPrepared;
-    iFrequency=aFrequency;
-    iDuration=aDuration;
-    iToneUtil->PrepareToPlayTone(iFrequency,iDuration);
+    iToneUtil = CMdaAudioToneUtility::NewL(*this);
+    iState = EBeepNotPrepared;
+    iFrequency = aFrequency;
+    iDuration = aDuration;
+    iToneUtil->PrepareToPlayTone(iFrequency, iDuration);
 }
 
 void QS60Beep::Play()
 {
-    if (iState != EBeepNotPrepared) {
-        if (iState == EBeepPlaying) {
-            iToneUtil->CancelPlay();
-            iState = EBeepPrepared;
-        }
+    if (iState == EBeepPlaying) {
+        iToneUtil->CancelPlay();
+        iState = EBeepPrepared;
     }
 
     iToneUtil->Play();
@@ -173,13 +183,14 @@ void QS60Beep::MatoPrepareComplete(TInt aError)
 {
     if (aError == KErrNone) {
         iState = EBeepPrepared;
+        Play();
     }
 }
 
 void QS60Beep::MatoPlayComplete(TInt aError)
 {
     Q_UNUSED(aError);
-    iState=EBeepPrepared;
+    iState = EBeepPrepared;
 }
 
 
@@ -1226,6 +1237,10 @@ void qt_init(QApplicationPrivate * /* priv */, int)
  *****************************************************************************/
 void qt_cleanup()
 {
+    if(qt_S60Beep) {
+        delete qt_S60Beep;
+        qt_S60Beep = 0;
+    }
     QFontCache::cleanup(); // Has to happen now, since QFontEngineS60 has FBS handles
 // S60 structure and window server session are freed in eventdispatcher destructor as they are needed there
 
@@ -1467,14 +1482,13 @@ void QApplication::setCursorFlashTime(int msecs)
 
 void QApplication::beep()
 {
-    TInt frequency=440;
-    TTimeIntervalMicroSeconds duration(500000);
-    QS60Beep* beep=NULL;
-    TRAPD(err, beep=QS60Beep::NewL(frequency, duration));
-    if (!err)
-        beep->Play();
-    delete beep;
-    beep=NULL;
+    if (!qt_S60Beep) {
+        TInt frequency = 880;
+        TTimeIntervalMicroSeconds duration(500000);
+        TRAP_IGNORE(qt_S60Beep=QS60Beep::NewL(frequency, duration));
+    }
+    if (qt_S60Beep)
+        qt_S60Beep->Play();
 }
 
 /*!
diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index fbb9115..b389054 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -4605,7 +4605,7 @@ void QWidgetPrivate::updateFont(const QFont &font)
     if (!q->parentWidget() && extra && extra->proxyWidget) {
         QGraphicsProxyWidget *p = extra->proxyWidget;
         inheritedFontResolveMask = p->d_func()->inheritedFontResolveMask | p->font().resolve();
-    } else 
+    } else
 #endif //QT_NO_GRAPHICSVIEW
     if (q->isWindow() && !q->testAttribute(Qt::WA_WindowPropagation)) {
         inheritedFontResolveMask = 0;
@@ -9897,13 +9897,13 @@ void QWidget::scroll(int dx, int dy)
     Q_D(QWidget);
 #ifndef QT_NO_GRAPHICSVIEW
     if (QGraphicsProxyWidget *proxy = QWidgetPrivate::nearestGraphicsProxyWidget(this)) {
-	// Graphics View maintains its own dirty region as a list of rects;
-	// until we can connect item updates directly to the view, we must
-	// separately add a translated dirty region.
-	if (!d->dirty.isEmpty()) {
-	    foreach (const QRect &rect, (d->dirty.translated(dx, dy)).rects())
-		proxy->update(rect);
-	}
+        // Graphics View maintains its own dirty region as a list of rects;
+        // until we can connect item updates directly to the view, we must
+        // separately add a translated dirty region.
+        if (!d->dirty.isEmpty()) {
+            foreach (const QRect &rect, (d->dirty.translated(dx, dy)).rects())
+                proxy->update(rect);
+        }
         proxy->scroll(dx, dy, proxy->subWidgetRect(this));
         return;
     }
@@ -9932,13 +9932,13 @@ void QWidget::scroll(int dx, int dy, const QRect &r)
     Q_D(QWidget);
 #ifndef QT_NO_GRAPHICSVIEW
     if (QGraphicsProxyWidget *proxy = QWidgetPrivate::nearestGraphicsProxyWidget(this)) {
-	// Graphics View maintains its own dirty region as a list of rects;
-	// until we can connect item updates directly to the view, we must
-	// separately add a translated dirty region.
-	if (!d->dirty.isEmpty()) {
-	    foreach (const QRect &rect, (d->dirty.translated(dx, dy) & r).rects())
-		proxy->update(rect);
-	}
+        // Graphics View maintains its own dirty region as a list of rects;
+        // until we can connect item updates directly to the view, we must
+        // separately add a translated dirty region.
+        if (!d->dirty.isEmpty()) {
+            foreach (const QRect &rect, (d->dirty.translated(dx, dy) & r).rects())
+                proxy->update(rect);
+        }
         proxy->scroll(dx, dy, r.translated(proxy->subWidgetRect(this).topLeft().toPoint()));
         return;
     }
diff --git a/src/gui/painting/qbackingstore.cpp b/src/gui/painting/qbackingstore.cpp
index 8226797..1b8f413 100644
--- a/src/gui/painting/qbackingstore.cpp
+++ b/src/gui/painting/qbackingstore.cpp
@@ -949,6 +949,8 @@ void QWidgetPrivate::scrollRect(const QRect &rect, int dx, int dy)
         return;
 
     QWidgetBackingStore *wbs = x->backingStore;
+    if (!wbs)
+        return;
 
     static int accelEnv = -1;
     if (accelEnv == -1) {
diff --git a/src/gui/styles/qs60style.cpp b/src/gui/styles/qs60style.cpp
index ee10ff6..dca78ca 100644
--- a/src/gui/styles/qs60style.cpp
+++ b/src/gui/styles/qs60style.cpp
@@ -144,7 +144,7 @@ const struct QS60StylePrivate::frameElementCenter QS60StylePrivate::m_frameEleme
     {SE_ToolBarButtonPressed,   QS60StyleEnums::SP_QsnFrSctrlButtonCenterPressed},
     {SE_PanelBackground,        QS60StyleEnums::SP_QsnFrSetOptCenter},
     {SE_ButtonInactive,         QS60StyleEnums::SP_QsnFrButtonCenterInactive},
-    {SE_Editor,                 QS60StyleEnums::SP_QsnFrNotepadCenter},
+    {SE_Editor,                 QS60StyleEnums::SP_QsnFrInputCenter},
 };
 
 static const int frameElementsCount =
@@ -459,11 +459,6 @@ void QS60StylePrivate::setThemePalette(QApplication *app) const
     storeThemePalette(&widgetPalette);
 }
 
-void QS60StylePrivate::setThemePalette(QStyleOption *option) const
-{
-    setThemePalette(&option->palette);
-}
-
 QPalette* QS60StylePrivate::themePalette()
 {
     return m_themePalette;
@@ -640,16 +635,16 @@ void QS60StylePrivate::setThemePalette(QWidget *widget) const
 {
     if(!widget)
         return;
-    QPalette widgetPalette = QApplication::palette(widget);
 
     //header view and its viewport need to be set 100% transparent button color, since drawing code will
     //draw transparent theme graphics to table column and row headers.
     if (qobject_cast<QHeaderView *>(widget)){
+        QPalette widgetPalette = QApplication::palette(widget);
         widgetPalette.setColor(QPalette::Active, QPalette::ButtonText,
             s60Color(QS60StyleEnums::CL_QsnTextColors, 23, 0));
         QHeaderView* header = qobject_cast<QHeaderView *>(widget);
         widgetPalette.setColor(QPalette::Button, Qt::transparent );
-        if ( header->viewport() )
+        if (header->viewport())
             header->viewport()->setPalette(widgetPalette);
         QApplication::setPalette(widgetPalette, "QHeaderView");
     }
@@ -812,7 +807,7 @@ QSize QS60StylePrivate::partSize(QS60StyleEnums::SkinParts part, SkinElementFlag
         case QS60StyleEnums::SP_QgnGrafTabActiveL:
             //Returned QSize for tabs must not be square, but narrow rectangle with width:height
             //ratio of 1:2 for horizontal tab bars (and 2:1 for vertical ones).
-            result.setWidth(10);
+            result.setWidth(result.height()>>1);
             break;
         case QS60StyleEnums::SP_QgnIndiSliderEdit:
             result.scale(pixelMetric(QStyle::PM_SliderLength),
@@ -870,7 +865,7 @@ QSize QS60StylePrivate::partSize(QS60StyleEnums::SkinParts part, SkinElementFlag
     return result;
 }
 
-bool QS60StylePrivate::canDrawThemeBackground(const QBrush &backgroundBrush) 
+bool QS60StylePrivate::canDrawThemeBackground(const QBrush &backgroundBrush)
 {
     //If brush is not changed from style's default values, draw theme graphics.
     return (backgroundBrush.color() == Qt::transparent ||
@@ -1788,7 +1783,7 @@ void QS60Style::drawControl(ControlElement element, const QStyleOption *option,
             if (qobject_cast<const QAbstractButton *>(widget)) {
                 //Make cornerButton slightly smaller so that it is not on top of table border graphic.
                 QStyleOptionHeader subopt = *header;
-                const int borderTweak = 
+                const int borderTweak =
                     QS60StylePrivate::pixelMetric(PM_Custom_FrameCornerWidth)>>1;
                 if (subopt.direction == Qt::LeftToRight)
                     subopt.rect.adjust(borderTweak, borderTweak, 0, -borderTweak);
@@ -1881,7 +1876,7 @@ void QS60Style::drawControl(ControlElement element, const QStyleOption *option,
                 adjustableFlags = (adjustableFlags | QS60StylePrivate::SF_PointWest);
             } else {
                 const int frameWidth = QS60StylePrivate::pixelMetric(PM_DefaultFrameWidth);
-                if (option->direction == Qt::LeftToRight) 
+                if (option->direction == Qt::LeftToRight)
                     headerRect.adjust(-2*frameWidth, 0, 0, 0);
                 else
                     headerRect.adjust(0, 0, 2*frameWidth, 0);
@@ -2027,7 +2022,7 @@ void QS60Style::drawPrimitive(PrimitiveElement element, const QStyleOption *opti
             buttonRect.setHeight((int)(buttonRect.height() * scaler));
             // move the rect up for half of the new height-gain
             const int newY = (buttonRect.bottomRight().y() - option->rect.bottomRight().y()) >> 1 ;
-            buttonRect.adjust(0,-newY,0,-newY);
+            buttonRect.adjust(0, -newY, -1, -newY);
 
             painter->save();
             QColor themeColor = d->s60Color(QS60StyleEnums::CL_QsnTextColors, 6, option);
@@ -2596,7 +2591,7 @@ QRect QS60Style::subControlRect(ComplexControl control, const QStyleOptionComple
             const int indicatorRect = pixelMetric(PM_MenuButtonIndicator) + 2*pixelMetric(PM_ButtonMargin);
             const int border = pixelMetric(PM_ButtonMargin) + pixelMetric(PM_DefaultFrameWidth);
             ret = toolButton->rect;
-            const bool popup = (toolButton->features & 
+            const bool popup = (toolButton->features &
                     (QStyleOptionToolButton::MenuButtonPopup | QStyleOptionToolButton::PopupDelay))
                     == QStyleOptionToolButton::MenuButtonPopup;
             switch (scontrol) {
diff --git a/src/gui/styles/qs60style_p.h b/src/gui/styles/qs60style_p.h
index ea86bb2..5ab2308 100644
--- a/src/gui/styles/qs60style_p.h
+++ b/src/gui/styles/qs60style_p.h
@@ -271,15 +271,6 @@ public:
         SP_QsnFrButtonSideLInactive,
         SP_QsnFrButtonSideRInactive,
         SP_QsnFrButtonCenterInactive,
-        SP_QsnFrNotepadCornerTl,
-        SP_QsnFrNotepadCornerTr,
-        SP_QsnFrNotepadCornerBl,
-        SP_QsnFrNotepadCornerBr,
-        SP_QsnFrNotepadSideT,
-        SP_QsnFrNotepadSideB,
-        SP_QsnFrNotepadSideL,
-        SP_QsnFrNotepadSideR,
-        SP_QsnFrNotepadCenter
     };
 
     enum ColorLists {
@@ -418,8 +409,6 @@ public:
 
     //set theme palette for application
     void setThemePalette(QApplication *application) const;
-    //set theme palette for style option
-    void setThemePalette(QStyleOption *option) const;
     //access to theme palette
     static QPalette* themePalette();
 
diff --git a/src/gui/text/qfontengine_win.cpp b/src/gui/text/qfontengine_win.cpp
index 18851b7..7ec8e31 100644
--- a/src/gui/text/qfontengine_win.cpp
+++ b/src/gui/text/qfontengine_win.cpp
@@ -485,6 +485,7 @@ glyph_metrics_t QFontEngineWin::boundingBox(const QGlyphLayout &glyphs)
     return glyph_metrics_t(0, -tm.tmAscent, w, tm.tmHeight, w, 0);
 }
 
+#ifndef Q_WS_WINCE
 bool QFontEngineWin::getOutlineMetrics(glyph_t glyph, const QTransform &t, glyph_metrics_t *metrics) const
 {
     Q_ASSERT(metrics != 0);
@@ -536,6 +537,7 @@ bool QFontEngineWin::getOutlineMetrics(glyph_t glyph, const QTransform &t, glyph
         return false;
     }
 }
+#endif
 
 glyph_metrics_t QFontEngineWin::boundingBox(glyph_t glyph, const QTransform &t)
 {
diff --git a/src/gui/text/qfontengine_win_p.h b/src/gui/text/qfontengine_win_p.h
index 43e1f12..bab71c9 100644
--- a/src/gui/text/qfontengine_win_p.h
+++ b/src/gui/text/qfontengine_win_p.h
@@ -109,7 +109,9 @@ public:
     int getGlyphIndexes(const QChar *ch, int numChars, QGlyphLayout *glyphs, bool mirrored) const;
     void getCMap();
 
+#ifndef Q_WS_WINCE
     bool getOutlineMetrics(glyph_t glyph, const QTransform &t, glyph_metrics_t *metrics) const;
+#endif
 
     QString     _name;
     HFONT       hfont;
diff --git a/src/gui/widgets/qmainwindow.cpp b/src/gui/widgets/qmainwindow.cpp
index 501e62f..557acfb 100644
--- a/src/gui/widgets/qmainwindow.cpp
+++ b/src/gui/widgets/qmainwindow.cpp
@@ -120,6 +120,7 @@ void QMainWindowPrivate::init()
 #ifdef QT_SOFTKEYS_ENABLED
     menuBarAction = QSoftKeyManager::createAction(QSoftKeyManager::MenuSoftKey, q);
     menuBarAction->setObjectName(QLatin1String("_q_menuSoftKeyAction"));
+    menuBarAction->setVisible(false);
 #endif
 }
 
diff --git a/src/gui/widgets/qmenu.cpp b/src/gui/widgets/qmenu.cpp
index 761a060..2e27226 100644
--- a/src/gui/widgets/qmenu.cpp
+++ b/src/gui/widgets/qmenu.cpp
@@ -229,7 +229,7 @@ void QMenuPrivate::updateActionRects() const
     Q_Q(const QMenu);
     if (!itemsDirty)
         return;
-		
+
     q->ensurePolished();
 
     //let's reinitialize the buffer
@@ -292,7 +292,7 @@ void QMenuPrivate::updateActionRects() const
         if (!action->isVisible() ||
             (collapsibleSeparators && previousWasSeparator && action->isSeparator()))
             continue; // we continue, this action will get an empty QRect
-        
+
         previousWasSeparator = action->isSeparator();
 
         //let the style modify the above size..
@@ -1139,7 +1139,7 @@ void QMenuPrivate::_q_actionTriggered()
             //we check the parent hierarchy
             QList< QPointer<QWidget> > list;
             for(QWidget *widget = q->parentWidget(); widget; ) {
-                if (qobject_cast<QMenu*>(widget) 
+                if (qobject_cast<QMenu*>(widget)
 #ifndef QT_NO_MENUBAR
                     || qobject_cast<QMenuBar*>(widget)
 #endif
@@ -1306,7 +1306,7 @@ void QMenu::initStyleOption(QStyleOptionMenuItem *option, const QAction *action)
     the addAction(), addActions() and insertAction() functions. An action
     is represented vertically and rendered by QStyle. In addition, actions
     can have a text label, an optional icon drawn on the very left side,
-    and shortcut key sequence such as "Ctrl+X". 
+    and shortcut key sequence such as "Ctrl+X".
 
     The existing actions held by a menu can be found with actions().
 
@@ -1906,9 +1906,9 @@ void QMenu::popup(const QPoint &p, QAction *atAction)
                 pos.setX(qMax(p.x()-size.width(), screen.right()-desktopFrame-size.width()+1));
         } else {
             if (pos.x()+size.width()-1 > screen.right()-desktopFrame)
-                pos.setX(qMin(p.x()+size.width(), screen.right()-desktopFrame-size.width()+1));
+                pos.setX(screen.right()-desktopFrame-size.width()+1);
             if (pos.x() < screen.left()+desktopFrame)
-                pos.setX(qMax(p.x(), screen.left() + desktopFrame));
+                pos.setX(screen.left() + desktopFrame);
         }
         if (pos.y() + size.height() - 1 > screen.bottom() - desktopFrame) {
             if(snapToMouse)
diff --git a/src/openvg/qpaintengine_vg.cpp b/src/openvg/qpaintengine_vg.cpp
index ba97d4f..6b829dd 100644
--- a/src/openvg/qpaintengine_vg.cpp
+++ b/src/openvg/qpaintengine_vg.cpp
@@ -1570,12 +1570,6 @@ void QVGPaintEngine::clip(const QRect &rect, Qt::ClipOperation op)
 
     d->dirty |= QPaintEngine::DirtyClipRegion;
 
-    // If we have a non-simple transform, then use path-based clipping.
-    if (op != Qt::NoClip && !clipTransformIsSimple(d->transform)) {
-        QPaintEngineEx::clip(rect, op);
-        return;
-    }
-
     switch (op) {
         case Qt::NoClip:
         {
@@ -1612,12 +1606,6 @@ void QVGPaintEngine::clip(const QRegion &region, Qt::ClipOperation op)
 
     d->dirty |= QPaintEngine::DirtyClipRegion;
 
-    // If we have a non-simple transform, then use path-based clipping.
-    if (op != Qt::NoClip && !clipTransformIsSimple(d->transform)) {
-        QPaintEngineEx::clip(region, op);
-        return;
-    }
-
     switch (op) {
         case Qt::NoClip:
         {
diff --git a/tests/auto/qabstractitemmodel/tst_qabstractitemmodel.cpp b/tests/auto/qabstractitemmodel/tst_qabstractitemmodel.cpp
index 413419d..3736813 100644
--- a/tests/auto/qabstractitemmodel/tst_qabstractitemmodel.cpp
+++ b/tests/auto/qabstractitemmodel/tst_qabstractitemmodel.cpp
@@ -112,6 +112,8 @@ private slots:
     void testMoveWithinOwnRange_data();
     void testMoveWithinOwnRange();
 
+    void testMoveThroughProxy();
+
     void testReset();
 
 
@@ -1112,6 +1114,25 @@ void tst_QAbstractItemModel::testMoveSameParentUp()
     }
 }
 
+void tst_QAbstractItemModel::testMoveThroughProxy()
+{
+    QSortFilterProxyModel *proxy = new QSortFilterProxyModel(this);
+    proxy->setSourceModel(m_model);
+
+    QList<QPersistentModelIndex> persistentList;
+
+    persistentList.append(proxy->index(0, 0));
+    persistentList.append(proxy->index(0, 0, proxy->mapFromSource(m_model->index(5, 0))));
+
+    ModelMoveCommand *moveCommand = new ModelMoveCommand(m_model, this);
+    moveCommand->setNumCols(4);
+    moveCommand->setAncestorRowNumbers(QList<int>() << 5);
+    moveCommand->setStartRow(0);
+    moveCommand->setEndRow(0);
+    moveCommand->setDestRow(0);
+    moveCommand->doCommand();
+}
+
 void tst_QAbstractItemModel::testMoveToGrandParent_data()
 {
     QTest::addColumn<int>("startRow");
diff --git a/tests/auto/qdoublespinbox/tst_qdoublespinbox.cpp b/tests/auto/qdoublespinbox/tst_qdoublespinbox.cpp
index 7d7453b..00ebed0 100644
--- a/tests/auto/qdoublespinbox/tst_qdoublespinbox.cpp
+++ b/tests/auto/qdoublespinbox/tst_qdoublespinbox.cpp
@@ -1050,7 +1050,6 @@ void tst_QDoubleSpinBox::taskQTBUG_5008_textFromValueAndValidate()
 {
     class DecoratedSpinBox : public QDoubleSpinBox
     {
-        friend class tst_QDoubleSpinBox;
     public:
         DecoratedSpinBox()
         {
@@ -1064,6 +1063,8 @@ void tst_QDoubleSpinBox::taskQTBUG_5008_textFromValueAndValidate()
         { 
             return locale().toString(value);
         }
+
+        using QDoubleSpinBox::lineEdit;
     } spinbox;
     spinbox.show();
     spinbox.activateWindow();
diff --git a/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp b/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp
index 20d9eb8..a8017ff 100644
--- a/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp
+++ b/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp
@@ -46,6 +46,8 @@
 #endif
 
 #include <QtGui>
+#include <private/qgraphicsscene_p.h>
+#include <private/qgraphicssceneindex_p.h>
 #include <math.h>
 #include "../../shared/util.h"
 
@@ -269,6 +271,7 @@ private slots:
     void initialFocus();
     void polishItems();
     void isActive();
+    void siblingIndexAlwaysValid();
 
     // task specific tests below me
     void task139710_bspTreeCrash();
@@ -4181,6 +4184,35 @@ void tst_QGraphicsScene::isActive()
 
 }
 
+void tst_QGraphicsScene::siblingIndexAlwaysValid()
+{
+    QGraphicsScene scene;
+
+    QGraphicsWidget *parent = new QGraphicsWidget;
+    parent->setZValue(350);
+    parent->setGeometry(0, 0, 100, 100);
+    QGraphicsWidget *parent2 = new QGraphicsWidget;
+    parent2->setGeometry(10, 10, 50, 50);
+    QGraphicsWidget *child = new QGraphicsWidget(parent2);
+    child->setGeometry(15, 15, 25, 25);
+    child->setZValue(150);
+    //Both are top level
+    scene.addItem(parent);
+    scene.addItem(parent2);
+
+    //Then we make the child a top level
+    child->setParentItem(0);
+
+    //This is trigerred by a repaint...
+    QGraphicsScenePrivate::get(&scene)->index->estimateTopLevelItems(QRectF(), Qt::AscendingOrder);
+
+    delete child;
+
+    //If there are in the list that's bad, we crash...
+    QVERIFY(!QGraphicsScenePrivate::get(&scene)->topLevelItems.contains(static_cast<QGraphicsItem *>(child)));
+
+}
+
 void tst_QGraphicsScene::taskQTBUG_5904_crashWithDeviceCoordinateCache()
 {
     QGraphicsScene scene;
diff --git a/tests/auto/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp b/tests/auto/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp
index e99e9d6..b7839f7 100644
--- a/tests/auto/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp
+++ b/tests/auto/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp
@@ -135,6 +135,7 @@ private slots:
     void task251296_hiddenChildren();
     void task252507_mapFromToSource();
     void task255652_removeRowsRecursive();
+    void taskQTBUG_6205_doubleProxySelectionSetSourceModel();
 
 protected:
     void buildHierarchy(const QStringList &data, QAbstractItemModel *model);
@@ -2815,5 +2816,41 @@ void tst_QSortFilterProxyModel::task255652_removeRowsRecursive()
     delete pItem11;
 }
 
+void tst_QSortFilterProxyModel::taskQTBUG_6205_doubleProxySelectionSetSourceModel()
+{
+    QStandardItemModel *model1 = new QStandardItemModel;
+    QStandardItem *parentItem = model1->invisibleRootItem();
+    for (int i = 0; i < 4; ++i) {
+        QStandardItem *item = new QStandardItem(QString("model1 item %0").arg(i));
+        parentItem->appendRow(item);
+        parentItem = item;
+    }
+
+    QStandardItemModel *model2 = new QStandardItemModel;
+    QStandardItem *parentItem2 = model2->invisibleRootItem();
+    for (int i = 0; i < 4; ++i) {
+        QStandardItem *item = new QStandardItem(QString("model2 item %0").arg(i));
+        parentItem2->appendRow(item);
+        parentItem2 = item;
+    }
+
+    QSortFilterProxyModel *toggleProxy = new QSortFilterProxyModel;
+    toggleProxy->setSourceModel(model1);
+
+    QSortFilterProxyModel *proxyModel = new QSortFilterProxyModel;
+    proxyModel->setSourceModel(toggleProxy);
+
+    QModelIndex mi = proxyModel->index(0, 0, proxyModel->index(0, 0, proxyModel->index(0, 0)));
+    QItemSelectionModel ism(proxyModel);
+    ism.select(mi, QItemSelectionModel::Select);
+    QModelIndexList mil = ism.selectedIndexes();
+    QCOMPARE(mil.count(), 1);
+    QCOMPARE(mil.first(), mi);
+
+    toggleProxy->setSourceModel(model2);
+    // No crash, it's good news!
+    QVERIFY(ism.selection().isEmpty());
+}
+
 QTEST_MAIN(tst_QSortFilterProxyModel)
 #include "tst_qsortfilterproxymodel.moc"
diff --git a/tests/auto/qspinbox/tst_qspinbox.cpp b/tests/auto/qspinbox/tst_qspinbox.cpp
index d2fe2ac..655de15 100644
--- a/tests/auto/qspinbox/tst_qspinbox.cpp
+++ b/tests/auto/qspinbox/tst_qspinbox.cpp
@@ -1010,7 +1010,6 @@ void tst_QSpinBox::taskQTBUG_5008_textFromValueAndValidate()
 {
     class DecoratedSpinBox : public QSpinBox
     {
-        friend class tst_QSpinBox;
     public:
         DecoratedSpinBox()
         {
@@ -1024,6 +1023,8 @@ void tst_QSpinBox::taskQTBUG_5008_textFromValueAndValidate()
         { 
             return locale().toString(value);
         }
+
+        using QSpinBox::lineEdit;
     } spinbox;
     spinbox.show();
     spinbox.activateWindow();
diff --git a/tests/auto/qwidget/tst_qwidget.cpp b/tests/auto/qwidget/tst_qwidget.cpp
index 1e3f5f8..9960f47 100644
--- a/tests/auto/qwidget/tst_qwidget.cpp
+++ b/tests/auto/qwidget/tst_qwidget.cpp
@@ -391,6 +391,7 @@ private slots:
 #endif
 
     void focusProxyAndInputMethods();
+    void scrollWithoutBackingStore();
 
 private:
     bool ensureScreenSize(int width, int height);
@@ -9703,5 +9704,42 @@ void tst_QWidget::focusProxyAndInputMethods()
     delete toplevel;
 }
 
+class scrollWidgetWBS : public QWidget
+{
+public:
+    void deleteBackingStore()
+    {
+        if (static_cast<QWidgetPrivate*>(d_ptr.data())->maybeBackingStore()) {
+            delete static_cast<QWidgetPrivate*>(d_ptr.data())->topData()->backingStore;    
+            static_cast<QWidgetPrivate*>(d_ptr.data())->topData()->backingStore = 0;
+        }
+    }
+    void enableBackingStore()
+    {
+        if (!static_cast<QWidgetPrivate*>(d_ptr.data())->maybeBackingStore()) {
+            static_cast<QWidgetPrivate*>(d_ptr.data())->topData()->backingStore = new QWidgetBackingStore(this);
+            static_cast<QWidgetPrivate*>(d_ptr.data())->invalidateBuffer(this->rect());
+            repaint();
+        }
+    }
+};
+
+void tst_QWidget::scrollWithoutBackingStore()
+{
+    scrollWidgetWBS scrollable;
+    scrollable.resize(100,100);
+    QLabel child(QString("@"),&scrollable);
+    child.resize(50,50);
+    scrollable.show();
+    QTest::qWaitForWindowShown(&scrollable);
+    scrollable.scroll(50,50);
+    QCOMPARE(child.pos(),QPoint(50,50));
+    scrollable.deleteBackingStore();
+    scrollable.scroll(-25,-25);
+    QCOMPARE(child.pos(),QPoint(25,25));
+    scrollable.enableBackingStore();
+    QCOMPARE(child.pos(),QPoint(25,25));
+}
+
 QTEST_MAIN(tst_QWidget)
 #include "tst_qwidget.moc"