Merge branch '4.7' of git@scm.dev.nokia.troll.no:qt/oslo-staging-2 into 4.7

44 files changed, 475 insertions, 355 deletions

diff --git a/src/gui/animation/qguivariantanimation.cpp b/src/gui/animation/qguivariantanimation.cpp
index 52303f5..28cde3e 100644
--- a/src/gui/animation/qguivariantanimation.cpp
+++ b/src/gui/animation/qguivariantanimation.cpp
@@ -38,12 +38,11 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
-
-#ifndef QT_NO_ANIMATION
-
 #include <QtCore/qvariantanimation.h>
 #include <private/qvariantanimation_p.h>
 
+#ifndef QT_NO_ANIMATION
+
 #include <QtGui/qcolor.h>
 #include <QtGui/qvector2d.h>
 #include <QtGui/qvector3d.h>
diff --git a/src/gui/dialogs/qfiledialog.cpp b/src/gui/dialogs/qfiledialog.cpp
index 3b5fb9f..cb74a3c 100644
--- a/src/gui/dialogs/qfiledialog.cpp
+++ b/src/gui/dialogs/qfiledialog.cpp
@@ -723,15 +723,19 @@ void QFileDialog::setVisible(bool visible)
             // Set WA_DontShowOnScreen so that QDialog::setVisible(visible) below
             // updates the state correctly, but skips showing the non-native version:
             setAttribute(Qt::WA_DontShowOnScreen);
+#ifndef QT_NO_FSCOMPLETER
             //So the completer don't try to complete and therefore to show a popup
             d->completer->setModel(0);
+#endif
         } else {
             d->nativeDialogInUse = false;
             setAttribute(Qt::WA_DontShowOnScreen, false);
+#ifndef QT_NO_FSCOMPLETER
             if (d->proxyModel != 0)
                 d->completer->setModel(d->proxyModel);
             else
                 d->completer->setModel(d->model);
+#endif
         }
     }
 
diff --git a/src/gui/dialogs/qprintdialog_unix.cpp b/src/gui/dialogs/qprintdialog_unix.cpp
index 9b4d6e8..e3c62be 100644
--- a/src/gui/dialogs/qprintdialog_unix.cpp
+++ b/src/gui/dialogs/qprintdialog_unix.cpp
@@ -703,7 +703,7 @@ QUnixPrintWidgetPrivate::QUnixPrintWidgetPrivate(QUnixPrintWidget *p)
     }
 #endif
 
-#ifndef QT_NO_FILESYSTEMMODEL
+#if !defined(QT_NO_FILESYSTEMMODEL) && !defined(QT_NO_COMPLETER)
     QFileSystemModel *fsm = new QFileSystemModel(widget.filename);
     fsm->setRootPath(QDir::homePath());
     widget.filename->setCompleter(new QCompleter(fsm, widget.filename));
diff --git a/src/gui/egl/qegl_p.h b/src/gui/egl/qegl_p.h
index 540cd3d..f81add6 100644
--- a/src/gui/egl/qegl_p.h
+++ b/src/gui/egl/qegl_p.h
@@ -139,6 +139,12 @@ QT_BEGIN_NAMESPACE
 typedef void *EGLImageKHR;
 #define EGL_NO_IMAGE_KHR            ((EGLImageKHR)0)
 #define EGL_IMAGE_PRESERVED_KHR     0x30D2
+#define EGL_KHR_image_base
+#endif
+
+#if !defined(EGL_KHR_image) && !defined(EGL_KHR_image_pixmap)
+#define EGL_NATIVE_PIXMAP_KHR       0x30B0
+#define EGL_KHR_image_pixmap
 #endif
 
 // It is possible that something has included eglext.h (like Symbian 10.1's broken egl.h), in
@@ -154,9 +160,6 @@ extern Q_GUI_EXPORT _eglCreateImageKHR eglCreateImageKHR;
 extern Q_GUI_EXPORT _eglDestroyImageKHR eglDestroyImageKHR;
 #endif // (defined(EGL_KHR_image) || defined(EGL_KHR_image_base)) && !defined(EGL_EGLEXT_PROTOTYPES)
 
-#if !defined(EGL_KHR_image) && !defined(EGL_KHR_image_pixmap)
-#define EGL_NATIVE_PIXMAP_KHR       0x30B0
-#endif
 
 
 class QEglProperties;
diff --git a/src/gui/egl/qegl_x11.cpp b/src/gui/egl/qegl_x11.cpp
index 91423c8..5341ea1 100644
--- a/src/gui/egl/qegl_x11.cpp
+++ b/src/gui/egl/qegl_x11.cpp
@@ -147,9 +147,6 @@ VisualID QEgl::getCompatibleVisualId(EGLConfig config)
     EGLint configAlphaSize = 0;
     eglGetConfigAttrib(display(), config, EGL_ALPHA_SIZE, &configAlphaSize);
 
-    eglGetConfigAttrib(display(), config, EGL_BUFFER_SIZE, &eglValue);
-    int configBitDepth = eglValue;
-
     eglGetConfigAttrib(display(), config, EGL_CONFIG_ID, &eglValue);
     int configId = eglValue;
 
@@ -166,28 +163,53 @@ VisualID QEgl::getCompatibleVisualId(EGLConfig config)
         int matchingCount = 0;
         chosenVisualInfo = XGetVisualInfo(X11->display, VisualIDMask, &visualInfoTemplate, &matchingCount);
         if (chosenVisualInfo) {
-            if (configBitDepth == chosenVisualInfo->depth) {
+            int visualRedSize = countBits(chosenVisualInfo->red_mask);
+            int visualGreenSize = countBits(chosenVisualInfo->green_mask);
+            int visualBlueSize = countBits(chosenVisualInfo->blue_mask);
+            int visualAlphaSize = -1; // Need XRender to tell us the alpha channel size
+
 #if !defined(QT_NO_XRENDER)
+            if (X11->use_xrender) {
                 // If we have XRender, actually check the visual supplied by EGL is ARGB
-                if (configAlphaSize > 0) {
-                    XRenderPictFormat *format;
-                    format = XRenderFindVisualFormat(X11->display, chosenVisualInfo->visual);
-                    if (!format || (format->type != PictTypeDirect) || (!format->direct.alphaMask)) {
-                        qWarning("Warning: EGL suggested using X visual ID %d for config %d, but this is not ARGB",
-                                 (int)visualId, configId);
-                        visualId = 0;
-                    }
-                }
+                XRenderPictFormat *format;
+                format = XRenderFindVisualFormat(X11->display, chosenVisualInfo->visual);
+                if (format && (format->type == PictTypeDirect))
+                    visualAlphaSize = countBits(format->direct.alphaMask);
+            }
 #endif
-            } else {
-                qWarning("Warning: EGL suggested using X visual ID %d (%d bpp) for config %d (%d bpp), but the depths do not match!",
-                         (int)visualId, chosenVisualInfo->depth, configId, configBitDepth);
+
+            bool visualMatchesConfig = false;
+            if ( visualRedSize == configRedSize &&
+                 visualGreenSize == configGreenSize &&
+                 visualBlueSize == configBlueSize )
+            {
+                // We need XRender to check the alpha channel size of the visual. If we don't have
+                // the alpha size, we don't check it against the EGL config's alpha size.
+                if (visualAlphaSize >= 0)
+                    visualMatchesConfig = visualAlphaSize == configAlphaSize;
+                else
+                    visualMatchesConfig = true;
+            }
+
+            if (!visualMatchesConfig) {
+                if (visualAlphaSize >= 0) {
+                    qWarning("Warning: EGL suggested using X Visual ID %d (ARGB%d%d%d%d) for EGL config %d (ARGB%d%d%d%d), but this is incompatable",
+                             (int)visualId, visualAlphaSize, visualRedSize, visualGreenSize, visualBlueSize,
+                             configId, configAlphaSize, configRedSize, configGreenSize, configBlueSize);
+                } else {
+                    qWarning("Warning: EGL suggested using X Visual ID %d (RGB%d%d%d) for EGL config %d (RGB%d%d%d), but this is incompatable",
+                             (int)visualId, visualRedSize, visualGreenSize, visualBlueSize,
+                             configId, configRedSize, configGreenSize, configBlueSize);
+                }
                 visualId = 0;
             }
+        } else {
+            qWarning("Warning: EGL suggested using X Visual ID %d for EGL config %d, but that isn't a valid ID",
+                     (int)visualId, configId);
+            visualId = 0;
         }
         XFree(chosenVisualInfo);
     }
-
     if (visualId) {
 #ifdef QT_DEBUG_X11_VISUAL_SELECTION
         if (configAlphaSize > 0)
@@ -201,17 +223,16 @@ VisualID QEgl::getCompatibleVisualId(EGLConfig config)
 
     // If EGL didn't give us a valid visual ID, try XRender
 #if !defined(QT_NO_XRENDER)
-    if (!visualId) {
+    if (!visualId && X11->use_xrender) {
         XVisualInfo visualInfoTemplate;
         memset(&visualInfoTemplate, 0, sizeof(XVisualInfo));
 
-        visualInfoTemplate.depth = configBitDepth;
         visualInfoTemplate.c_class = TrueColor;
 
         XVisualInfo *matchingVisuals;
         int matchingCount = 0;
         matchingVisuals = XGetVisualInfo(X11->display,
-                                         VisualDepthMask|VisualClassMask,
+                                         VisualClassMask,
                                          &visualInfoTemplate,
                                          &matchingCount);
 
@@ -246,19 +267,27 @@ VisualID QEgl::getCompatibleVisualId(EGLConfig config)
 
 
     // Finally, if XRender also failed to find a visual (or isn't present), try to
-    // use XGetVisualInfo and only use the bit depth to match on:
+    // use XGetVisualInfo and only use the bit depths to match on:
     if (!visualId) {
         XVisualInfo visualInfoTemplate;
         memset(&visualInfoTemplate, 0, sizeof(XVisualInfo));
-
-        visualInfoTemplate.depth = configBitDepth;
-
         XVisualInfo *matchingVisuals;
         int matchingCount = 0;
+
+        visualInfoTemplate.depth = configRedSize + configGreenSize + configBlueSize + configAlphaSize;
         matchingVisuals = XGetVisualInfo(X11->display,
                                          VisualDepthMask,
                                          &visualInfoTemplate,
                                          &matchingCount);
+        if (!matchingVisuals) {
+            // Try again without taking the alpha channel into account:
+            visualInfoTemplate.depth = configRedSize + configGreenSize + configBlueSize;
+            matchingVisuals = XGetVisualInfo(X11->display,
+                                             VisualDepthMask,
+                                             &visualInfoTemplate,
+                                             &matchingCount);
+        }
+
         if (matchingVisuals) {
             visualId = matchingVisuals[0].visualid;
             XFree(matchingVisuals);
diff --git a/src/gui/embedded/qscreenlinuxfb_qws.cpp b/src/gui/embedded/qscreenlinuxfb_qws.cpp
index 8a21022..1effcfa 100644
--- a/src/gui/embedded/qscreenlinuxfb_qws.cpp
+++ b/src/gui/embedded/qscreenlinuxfb_qws.cpp
@@ -91,6 +91,7 @@ public:
     int startuph;
     int startupd;
     bool blank;
+    QLinuxFbScreen::DriverTypes driverType;
 
     bool doGraphicsMode;
 #ifdef QT_QWS_DEPTH_GENERIC
@@ -165,6 +166,36 @@ void QLinuxFbScreenPrivate::closeTty()
 }
 
 /*!
+    \enum QLinuxFbScreen::DriverTypes
+
+    This enum describes the driver type.
+
+    \value GenericDriver Generic Linux framebuffer driver
+    \value EInk8Track e-Ink framebuffer driver using the 8Track chipset
+ */
+
+/*!
+    \fn QLinuxFbScreen::fixupScreenInfo(fb_fix_screeninfo &finfo, fb_var_screeninfo &vinfo)
+
+    Adjust the values returned by the framebuffer driver, to work
+    around driver bugs or nonstandard behavior in certain drivers.
+    \a finfo and \a vinfo specify the fixed and variable screen info
+    returned by the driver.
+ */
+void QLinuxFbScreen::fixupScreenInfo(fb_fix_screeninfo &finfo, fb_var_screeninfo &vinfo)
+{
+    // 8Track e-ink devices (as found in Sony PRS-505) lie
+    // about their bit depth -- they claim they're 1 bit per
+    // pixel while the only supported mode is 8 bit per pixel
+    // grayscale.
+    // Caused by this, they also miscalculate their line length.
+    if(!strcmp(finfo.id, "8TRACKFB") && vinfo.bits_per_pixel == 1) {
+        vinfo.bits_per_pixel = 8;
+        finfo.line_length = vinfo.xres;
+    }
+}
+
+/*!
     \internal
 
     \class QLinuxFbScreen
@@ -306,6 +337,8 @@ bool QLinuxFbScreen::connect(const QString &displaySpec)
         return false;
     }
 
+    d_ptr->driverType = strcmp(finfo.id, "8TRACKFB") ? GenericDriver : EInk8Track;
+
     if (finfo.type == FB_TYPE_VGA_PLANES) {
         qWarning("VGA16 video mode not supported");
         return false;
@@ -318,6 +351,8 @@ bool QLinuxFbScreen::connect(const QString &displaySpec)
         return false;
     }
 
+    fixupScreenInfo(finfo, vinfo);
+
     grayscale = vinfo.grayscale;
     d = vinfo.bits_per_pixel;
     if (d == 24) {
@@ -664,11 +699,6 @@ bool QLinuxFbScreen::initDevice()
            vinfo.transp.msb_right);
 #endif
 
-    d_ptr->startupw=vinfo.xres;
-    d_ptr->startuph=vinfo.yres;
-    d_ptr->startupd=vinfo.bits_per_pixel;
-    grayscale = vinfo.grayscale;
-
     if (ioctl(d_ptr->fd, FBIOGET_FSCREENINFO, &finfo)) {
         perror("QLinuxFbScreen::initDevice");
         qCritical("Error reading fixed information in card init");
@@ -677,6 +707,13 @@ bool QLinuxFbScreen::initDevice()
         return true;
     }
 
+    fixupScreenInfo(finfo, vinfo);
+
+    d_ptr->startupw=vinfo.xres;
+    d_ptr->startuph=vinfo.yres;
+    d_ptr->startupd=vinfo.bits_per_pixel;
+    grayscale = vinfo.grayscale;
+
 #ifdef __i386__
     // Now init mtrr
     if(!::getenv("QWS_NOMTRR")) {
@@ -1122,6 +1159,7 @@ void QLinuxFbScreen::setMode(int nw,int nh,int nd)
         qFatal("Error reading fixed information");
     }
 
+    fixupScreenInfo(finfo, vinfo);
     disconnect();
     connect(d_ptr->displaySpec);
     exposeRegion(region(), 0);
@@ -1200,6 +1238,26 @@ int QLinuxFbScreen::sharedRamSize(void * end)
 /*!
     \reimp
 */
+void QLinuxFbScreen::setDirty(const QRect &r)
+{
+    if(d_ptr->driverType == EInk8Track) {
+        // e-Ink displays need a trigger to actually show what is
+        // in their framebuffer memory. The 8-Track driver does this
+        // by adding custom IOCTLs - FBIO_EINK_DISP_PIC (0x46a2) takes
+        // an argument specifying whether or not to flash the screen
+        // while updating.
+        // There doesn't seem to be a way to tell it to just update
+        // a subset of the screen.
+        if(r.left() == 0 && r.top() == 0 && r.width() == dw && r.height() == dh)
+            ioctl(d_ptr->fd, 0x46a2, 1);
+        else
+            ioctl(d_ptr->fd, 0x46a2, 0);
+    }
+}
+
+/*!
+    \reimp
+*/
 void QLinuxFbScreen::blank(bool on)
 {
     if (d_ptr->blank == on)
@@ -1315,7 +1373,9 @@ void QLinuxFbScreen::setPixelFormat(struct fb_var_screeninfo info)
 
 bool QLinuxFbScreen::useOffscreen()
 {
-    if ((mapsize - size) < 16*1024)
+    // Not done for 8Track because on e-Ink displays,
+    // everything is offscreen anyway
+    if (d_ptr->driverType == EInk8Track || ((mapsize - size) < 16*1024))
         return false;
 
     return true;
diff --git a/src/gui/embedded/qscreenlinuxfb_qws.h b/src/gui/embedded/qscreenlinuxfb_qws.h
index ac488b7..6abadbf 100644
--- a/src/gui/embedded/qscreenlinuxfb_qws.h
+++ b/src/gui/embedded/qscreenlinuxfb_qws.h
@@ -88,6 +88,8 @@ public:
 
     virtual bool useOffscreen();
 
+    enum DriverTypes { GenericDriver, EInk8Track };
+
     virtual void disconnect();
     virtual void shutdownDevice();
     virtual void setMode(int,int,int);
@@ -98,6 +100,7 @@ public:
     virtual uchar * cache(int);
     virtual void uncache(uchar *);
     virtual int sharedRamSize(void *);
+    virtual void setDirty(const QRect&);
 
     QLinuxFb_Shared * shared;
 
@@ -109,6 +112,7 @@ protected:
     int dataoffset;
     int cacheStart;
 
+    virtual void fixupScreenInfo(fb_fix_screeninfo &finfo, fb_var_screeninfo &vinfo);
     static void clearCache(QScreen *instance, int);
 
 private:
diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp
index f106b3d..d6daf4d 100644
--- a/src/gui/graphicsview/qgraphicsitem.cpp
+++ b/src/gui/graphicsview/qgraphicsitem.cpp
@@ -7112,7 +7112,8 @@ void QGraphicsItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
                     // Root items that ignore transformations need to
                     // calculate their diff by mapping viewport coordinates
                     // directly to parent coordinates.
-                    QTransform viewToParentTransform = (item->transform().translate(item->d_ptr->pos.x(), item->d_ptr->pos.y()))
+                    // COMBINE
+                    QTransform viewToParentTransform = (item->d_func()->transformData->computedFullTransform().translate(item->d_ptr->pos.x(), item->d_ptr->pos.y()))
                                                        * (item->sceneTransform() * view->viewportTransform()).inverted();
                     currentParentPos = viewToParentTransform.map(QPointF(view->mapFromGlobal(event->screenPos())));
                     buttonDownParentPos = viewToParentTransform.map(QPointF(view->mapFromGlobal(event->buttonDownScreenPos(Qt::LeftButton))));
diff --git a/src/gui/gui.pro b/src/gui/gui.pro
index b22f732..300a03f 100644
--- a/src/gui/gui.pro
+++ b/src/gui/gui.pro
@@ -55,7 +55,7 @@ DEFINES += Q_INTERNAL_QAPP_SRC
 symbian {
     TARGET.UID3=0x2001B2DD
 
-    symbian-abld:symbian-sbsv2 {
+    symbian-abld|symbian-sbsv2 {
         # ro-section in gui can exceed default allocated space, so move rw-section a little further
         QMAKE_LFLAGS.ARMCC += --rw-base 0x800000
         QMAKE_LFLAGS.GCCE += -Tdata 0xC00000
diff --git a/src/gui/itemviews/qfileiconprovider.cpp b/src/gui/itemviews/qfileiconprovider.cpp
index f321ab3..5dbd1f0 100644
--- a/src/gui/itemviews/qfileiconprovider.cpp
+++ b/src/gui/itemviews/qfileiconprovider.cpp
@@ -254,7 +254,9 @@ QIcon QFileIconProviderPrivate::getWinIcon(const QFileInfo &fileInfo) const
     val = SHGetFileInfo((const wchar_t *)QDir::toNativeSeparators(fileInfo.filePath()).utf16(), 0, &info,
                         sizeof(SHFILEINFO), SHGFI_SMALLICON|SHGFI_SYSICONINDEX);
 #endif
-    if (val) {
+
+    // Even if GetFileInfo returns a valid result, hIcon can be empty in some cases
+    if (val && info.hIcon) {
         if (fileInfo.isDir() && !fileInfo.isRoot()) {
             //using the unique icon index provided by windows save us from duplicate keys
             key = QString::fromLatin1("qt_dir_%1").arg(info.iIcon);
@@ -293,7 +295,7 @@ QIcon QFileIconProviderPrivate::getWinIcon(const QFileInfo &fileInfo) const
     val = SHGetFileInfo((const wchar_t *)QDir::toNativeSeparators(fileInfo.filePath()).utf16(), 0, &info,
                         sizeof(SHFILEINFO), SHGFI_LARGEICON|SHGFI_SYSICONINDEX);
 #endif
-    if (val) {
+    if (val && info.hIcon) {
         if (fileInfo.isDir() && !fileInfo.isRoot()) {
             //using the unique icon index provided by windows save us from duplicate keys
             key = QString::fromLatin1("qt_dir_%1").arg(info.iIcon);
diff --git a/src/gui/itemviews/qitemselectionmodel.cpp b/src/gui/itemviews/qitemselectionmodel.cpp
index d6e68f6..f848321 100644
--- a/src/gui/itemviews/qitemselectionmodel.cpp
+++ b/src/gui/itemviews/qitemselectionmodel.cpp
@@ -292,6 +292,27 @@ static void indexesFromRange(const QItemSelectionRange &range, QModelIndexList &
 }
 
 /*!
+    Returns true if the selection range contains no selectable item
+    \since 4.7
+*/
+
+bool QItemSelectionRange::isEmpty() const
+{
+    if (!isValid() || !model())
+        return true;
+
+    for (int column = left(); column <= right(); ++column) {
+        for (int row = top(); row <= bottom(); ++row) {
+            QModelIndex index = model()->index(row, column, parent());
+            Qt::ItemFlags flags = model()->flags(index);
+            if ((flags & Qt::ItemIsSelectable) && (flags & Qt::ItemIsEnabled))
+                return false;
+        }
+    }
+    return true;
+}
+
+/*!
     Returns the list of model index items stored in the selection.
 */
 
diff --git a/src/gui/itemviews/qitemselectionmodel.h b/src/gui/itemviews/qitemselectionmodel.h
index 9980d0f..436514f 100644
--- a/src/gui/itemviews/qitemselectionmodel.h
+++ b/src/gui/itemviews/qitemselectionmodel.h
@@ -108,6 +108,8 @@ public:
                 && top() <= bottom() && left() <= right());
     }
 
+    bool isEmpty() const;
+
     QModelIndexList indexes() const;
 
 private:
diff --git a/src/gui/itemviews/qtableview.cpp b/src/gui/itemviews/qtableview.cpp
index 43445b4..f49f273 100644
--- a/src/gui/itemviews/qtableview.cpp
+++ b/src/gui/itemviews/qtableview.cpp
@@ -1847,7 +1847,9 @@ void QTableView::setSelection(const QRect &rect, QItemSelectionModel::SelectionF
             selection.append(QItemSelectionRange(topLeft, bottomRight));
         }
     } else { // nothing moved
-        selection.append(QItemSelectionRange(tl, br));
+        QItemSelectionRange range(tl, br);
+        if (!range.isEmpty())
+            selection.append(range);
     }
 
     d->selectionModel->select(selection, command);
diff --git a/src/gui/itemviews/qtreeview.cpp b/src/gui/itemviews/qtreeview.cpp
index d934683..c3ff2bd 100644
--- a/src/gui/itemviews/qtreeview.cpp
+++ b/src/gui/itemviews/qtreeview.cpp
@@ -3194,12 +3194,16 @@ void QTreeViewPrivate::layout(int i, bool recursiveExpanding, bool afterIsUninit
 int QTreeViewPrivate::pageUp(int i) const
 {
     int index = itemAtCoordinate(coordinateForItem(i) - viewport->height());
+    while (isItemHiddenOrDisabled(index))
+        index--;
     return index == -1 ? 0 : index;
 }
 
 int QTreeViewPrivate::pageDown(int i) const
 {
     int index = itemAtCoordinate(coordinateForItem(i) + viewport->height());
+    while (isItemHiddenOrDisabled(index))
+        index++;
     return index == -1 ? viewItems.count() - 1 : index;
 }
 
diff --git a/src/gui/itemviews/qtreewidget.cpp b/src/gui/itemviews/qtreewidget.cpp
index 19ed10b..4c80325 100644
--- a/src/gui/itemviews/qtreewidget.cpp
+++ b/src/gui/itemviews/qtreewidget.cpp
@@ -3039,10 +3039,14 @@ QList<QTreeWidgetItem*> QTreeWidget::selectedItems() const
     Q_D(const QTreeWidget);
     QModelIndexList indexes = selectionModel()->selectedIndexes();
     QList<QTreeWidgetItem*> items;
+    items.reserve(indexes.count());
+    QSet<QTreeWidgetItem *> seen;
+    seen.reserve(indexes.count());
     for (int i = 0; i < indexes.count(); ++i) {
         QTreeWidgetItem *item = d->item(indexes.at(i));
-        if (isItemHidden(item) || items.contains(item)) // ### slow, optimize later
+        if (isItemHidden(item) || seen.contains(item))
             continue;
+        seen.insert(item);
         items.append(item);
     }
     return items;
diff --git a/src/gui/kernel/qapplication.cpp b/src/gui/kernel/qapplication.cpp
index be2683d..b0a23d4 100644
--- a/src/gui/kernel/qapplication.cpp
+++ b/src/gui/kernel/qapplication.cpp
@@ -5292,9 +5292,9 @@ QInputContext *QApplication::inputContext() const
         QApplication *that = const_cast<QApplication *>(this);
         const QStringList keys = QInputContextFactory::keys();
         // Try hbim and coefep first, then try others.
-        if (keys.contains("hbim")) {
+        if (keys.contains(QLatin1String("hbim"))) {
             that->d_func()->inputContext = QInputContextFactory::create(QLatin1String("hbim"), that);
-        } else if (keys.contains("coefep")) {
+        } else if (keys.contains(QLatin1String("coefep"))) {
             that->d_func()->inputContext = QInputContextFactory::create(QLatin1String("coefep"), that);
         } else {
             for (int c = 0; c < keys.size() && !d->inputContext; ++c) {
diff --git a/src/gui/kernel/qeventdispatcher_mac.mm b/src/gui/kernel/qeventdispatcher_mac.mm
index 62e1e81..a7f1224 100644
--- a/src/gui/kernel/qeventdispatcher_mac.mm
+++ b/src/gui/kernel/qeventdispatcher_mac.mm
@@ -831,7 +831,14 @@ NSModalSession QEventDispatcherMacPrivate::currentModalSession()
             QBoolBlocker block1(blockSendPostedEvents, true);
             info.nswindow = window;
             [(NSWindow*) info.nswindow retain];
-            info.session = [NSApp beginModalSessionForWindow:window];
+            // When creating a modal session cocoa will rearrange the windows.
+            // In order to avoid windows to be put behind another we need to
+            // keep the window level.
+            {
+                int level = [window level];
+                info.session = [NSApp beginModalSessionForWindow:window];
+                [window setLevel:level];
+            }
         }
         currentModalSessionCached = info.session;
     }
diff --git a/src/gui/kernel/qgridlayout.cpp b/src/gui/kernel/qgridlayout.cpp
index dbd3c01..81a4d04 100644
--- a/src/gui/kernel/qgridlayout.cpp
+++ b/src/gui/kernel/qgridlayout.cpp
@@ -1852,7 +1852,7 @@ void QGridLayout::invalidate()
 /*!
     \fn int QGridLayout::colSpacing(int col) const
 
-    Use columnSpacing() instead.
+    Use columnMinimumWidth() instead.
 */
 
 /*!
diff --git a/src/gui/kernel/qlayoutitem.cpp b/src/gui/kernel/qlayoutitem.cpp
index 6a91d95..e615b2d 100644
--- a/src/gui/kernel/qlayoutitem.cpp
+++ b/src/gui/kernel/qlayoutitem.cpp
@@ -516,9 +516,7 @@ bool QWidgetItem::hasHeightForWidth() const
 {
     if (isEmpty())
         return false;
-    if (wid->layout())
-        return wid->layout()->hasHeightForWidth();
-    return wid->sizePolicy().hasHeightForWidth();
+    return wid->hasHeightForWidth();
 }
 
 /*!
diff --git a/src/gui/kernel/qsoftkeymanager.cpp b/src/gui/kernel/qsoftkeymanager.cpp
index 923144a..23f1481 100644
--- a/src/gui/kernel/qsoftkeymanager.cpp
+++ b/src/gui/kernel/qsoftkeymanager.cpp
@@ -242,6 +242,7 @@ bool QSoftKeyManager::handleUpdateSoftKeys()
     d->requestedSoftKeyActions.clear();
     bool recursiveMerging = false;
     QWidget *source = softkeySource(NULL, recursiveMerging);
+    d->initialSoftKeySource = source;
     while (source) {
         if (appendSoftkeys(*source, level))
             ++level;
diff --git a/src/gui/kernel/qsoftkeymanager_common_p.h b/src/gui/kernel/qsoftkeymanager_common_p.h
index 460d0dc..04ddf7d 100644
--- a/src/gui/kernel/qsoftkeymanager_common_p.h
+++ b/src/gui/kernel/qsoftkeymanager_common_p.h
@@ -70,6 +70,7 @@ protected:
     static QSoftKeyManager *self;
     QHash<QAction*, Qt::Key> keyedActions;
     QMultiHash<int, QAction*> requestedSoftKeyActions;
+    QWidget *initialSoftKeySource;
 
 };
 
@@ -79,4 +80,4 @@ QT_END_NAMESPACE
 
 QT_END_HEADER
 
-#endif // QSOFTKEYMANAGER_COMMON_P_H
\ No newline at end of file
+#endif // QSOFTKEYMANAGER_COMMON_P_H
diff --git a/src/gui/kernel/qsoftkeymanager_s60.cpp b/src/gui/kernel/qsoftkeymanager_s60.cpp
index 9812d72..7d643c2 100644
--- a/src/gui/kernel/qsoftkeymanager_s60.cpp
+++ b/src/gui/kernel/qsoftkeymanager_s60.cpp
@@ -312,17 +312,8 @@ bool QSoftKeyManagerPrivateS60::setMiddleSoftkey(CEikButtonGroupContainer &cba)
 bool QSoftKeyManagerPrivateS60::setRightSoftkey(CEikButtonGroupContainer &cba)
 {
     if (!setSoftkey(cba, QAction::NegativeSoftKey, RSK_POSITION)) {
-        Qt::WindowType windowType = Qt::Window;
-        QAction *action = requestedSoftKeyActions.value(0);
-        if (action) {
-            QWidget *actionParent = action->parentWidget();
-            Q_ASSERT_X(actionParent, Q_FUNC_INFO, "No parent set for softkey action!");
-
-            QWidget *actionWindow = actionParent->window();
-            Q_ASSERT_X(actionWindow, Q_FUNC_INFO, "Softkey action does not have window!");
-            windowType = actionWindow->windowType();
-        }
-
+        const Qt::WindowType windowType = initialSoftKeySource
+            ? initialSoftKeySource->window()->windowType() : Qt::Window;
         if (windowType != Qt::Dialog && windowType != Qt::Popup) {
             QString text(QSoftKeyManager::tr("Exit"));
             TPtrC nativeText = qt_QString2TPtrC(text);
diff --git a/src/gui/kernel/qstackedlayout.cpp b/src/gui/kernel/qstackedlayout.cpp
index 7559066..4b49638 100644
--- a/src/gui/kernel/qstackedlayout.cpp
+++ b/src/gui/kernel/qstackedlayout.cpp
@@ -475,6 +475,32 @@ void QStackedLayout::setGeometry(const QRect &rect)
     }
 }
 
+bool QStackedLayout::hasHeightForWidth() const
+{
+    const int n = count();
+
+    for (int i = 0; i < n; ++i) {
+        if (QLayoutItem *item = itemAt(i)) {
+            if (item->hasHeightForWidth())
+                return true;
+        }
+    }
+    return false;
+}
+
+int QStackedLayout::heightForWidth(int width) const
+{
+    const int n = count();
+
+    int hfw = 0;
+    for (int i = 0; i < n; ++i) {
+        if (QLayoutItem *item = itemAt(i)) {
+            hfw = qMax(hfw, item->heightForWidth(width));
+        }
+    }
+    return hfw;
+}
+
 /*!
     \enum QStackedLayout::StackingMode
     \since 4.4
diff --git a/src/gui/kernel/qstackedlayout.h b/src/gui/kernel/qstackedlayout.h
index c069149..842b62b 100644
--- a/src/gui/kernel/qstackedlayout.h
+++ b/src/gui/kernel/qstackedlayout.h
@@ -95,6 +95,8 @@ public:
     QLayoutItem *itemAt(int) const;
     QLayoutItem *takeAt(int);
     void setGeometry(const QRect &rect);
+    bool hasHeightForWidth() const;
+    int heightForWidth(int width) const;
 
 Q_SIGNALS:
     void widgetRemoved(int index);
diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index e88026c..7a8b700 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -3816,6 +3816,11 @@ void QWidget::setMaximumSize(int maxw, int maxh)
     d->updateGeometry_helper(d->extra->minw == d->extra->maxw && d->extra->minh == d->extra->maxh);
 }
 
+bool QWidgetPrivate::hasHeightForWidth() const
+{
+    return layout ? layout->hasHeightForWidth() : size_policy.hasHeightForWidth();
+}
+
 /*!
     \overload
 
@@ -7961,6 +7966,18 @@ QSize QWidget::minimumSizeHint() const
     return QSize(-1, -1);
 }
 
+/*!
+    \internal
+    This is a bit hackish, but ideally this would have been a virtual
+    function so that subclasses could reimplement their own function.
+    Instead we add a virtual function to QWidgetPrivate.
+*/
+bool QWidget::hasHeightForWidth() const
+{
+    Q_D(const QWidget);
+    return d->hasHeightForWidth();
+}
+
 
 /*!
     \fn QWidget *QWidget::parentWidget() const
diff --git a/src/gui/kernel/qwidget.h b/src/gui/kernel/qwidget.h
index e12148b..6e5de7d 100644
--- a/src/gui/kernel/qwidget.h
+++ b/src/gui/kernel/qwidget.h
@@ -524,6 +524,7 @@ public:
 
     virtual QSize sizeHint() const;
     virtual QSize minimumSizeHint() const;
+    bool hasHeightForWidth() const;
 
     QSizePolicy sizePolicy() const;
     void setSizePolicy(QSizePolicy);
diff --git a/src/gui/kernel/qwidget_p.h b/src/gui/kernel/qwidget_p.h
index 89ea256..05a859c 100644
--- a/src/gui/kernel/qwidget_p.h
+++ b/src/gui/kernel/qwidget_p.h
@@ -493,6 +493,7 @@ public:
 
     bool setMinimumSize_helper(int &minw, int &minh);
     bool setMaximumSize_helper(int &maxw, int &maxh);
+    virtual bool hasHeightForWidth() const;
     void setConstraints_sys();
     QWidget *childAt_helper(const QPoint &, bool) const;
     void updateGeometry_helper(bool forceUpdate);
diff --git a/src/gui/painting/qbezier.cpp b/src/gui/painting/qbezier.cpp
index ea7fe4f..a08c79e 100644
--- a/src/gui/painting/qbezier.cpp
+++ b/src/gui/painting/qbezier.cpp
@@ -117,8 +117,8 @@ QBezier QBezier::mapBy(const QTransform &transform) const
     return QBezier::fromPoints(transform.map(pt1()), transform.map(pt2()), transform.map(pt3()), transform.map(pt4()));
 }
 
-//0.5 is really low
-static const qreal flatness = 0.5;
+//0.05 is really low, but required for scaled-up beziers...
+static const qreal flatness = 0.05;
 
 //based on "Fast, precise flattening of cubic Bezier path and offset curves"
 //      by T. F. Hain, A. L. Ahmad, S. V. R. Racherla and D. D. Langan
diff --git a/src/gui/painting/qbrush.cpp b/src/gui/painting/qbrush.cpp
index a82d0f9..182cce9 100644
--- a/src/gui/painting/qbrush.cpp
+++ b/src/gui/painting/qbrush.cpp
@@ -989,7 +989,8 @@ QDebug operator<<(QDebug dbg, const QBrush &b)
      "LinearGradientPattern",
      "RadialGradientPattern",
      "ConicalGradientPattern",
-     "TexturePattern"
+     0, 0, 0, 0, 0, 0,
+     "TexturePattern" // 24
     };
 
     dbg.nospace() << "QBrush(" << b.color() << ',' << BRUSH_STYLES[b.style()] << ')';
diff --git a/src/gui/painting/qdrawhelper.cpp b/src/gui/painting/qdrawhelper.cpp
index 917b910..a0c9828 100644
--- a/src/gui/painting/qdrawhelper.cpp
+++ b/src/gui/painting/qdrawhelper.cpp
@@ -70,8 +70,10 @@ static uint gccBug(uint value)
   constants and structures
 */
 
-static const int fixed_scale = 1 << 16;
-static const int half_point = 1 << 15;
+enum {
+    fixed_scale = 1 << 16,
+    half_point = 1 << 15
+};
 static const int buffer_size = 2048;
 
 struct LinearGradientValues
@@ -691,37 +693,32 @@ const uint * QT_FASTCALL fetchTransformedBilinear(uint *buffer, const Operator *
         fy -= half_point;
         while (b < end) {
             int x1 = (fx >> 16);
-            int x2 = x1 + 1;
+            int x2;
             int y1 = (fy >> 16);
-            int y2 = y1 + 1;
-
-            int distx = ((fx - (x1 << 16)) >> 8);
-            int disty = ((fy - (y1 << 16)) >> 8);
-            int idistx = 256 - distx;
-            int idisty = 256 - disty;
+            int y2;
 
             if (blendType == BlendTransformedBilinearTiled) {
                 x1 %= image_width;
+                if (x1 < 0) x1 += image_width;
+                x2 = x1 + 1;
                 x2 %= image_width;
-                y1 %= image_height;
-                y2 %= image_height;
 
-                if (x1 < 0) x1 += image_width;
-                if (x2 < 0) x2 += image_width;
+                y1 %= image_height;
                 if (y1 < 0) y1 += image_height;
-                if (y2 < 0) y2 += image_height;
-
-                Q_ASSERT(x1 >= 0 && x1 < image_width);
-                Q_ASSERT(x2 >= 0 && x2 < image_width);
-                Q_ASSERT(y1 >= 0 && y1 < image_height);
-                Q_ASSERT(y2 >= 0 && y2 < image_height);
+                y2 = y1 + 1;
+                y2 %= image_height;
             } else {
                 x1 = qBound(0, x1, image_width - 1);
-                x2 = qBound(0, x2, image_width - 1);
+                x2 = qMin(x1 + 1, image_width - 1);
                 y1 = qBound(0, y1, image_height - 1);
-                y2 = qBound(0, y2, image_height - 1);
+                y2 = qMin(y1 + 1, image_height - 1);
             }
 
+            Q_ASSERT(x1 >= 0 && x1 < image_width);
+            Q_ASSERT(x2 >= 0 && x2 < image_width);
+            Q_ASSERT(y1 >= 0 && y1 < image_height);
+            Q_ASSERT(y2 >= 0 && y2 < image_height);
+
             const uchar *s1 = data->texture.scanLine(y1);
             const uchar *s2 = data->texture.scanLine(y2);
 
@@ -730,6 +727,11 @@ const uint * QT_FASTCALL fetchTransformedBilinear(uint *buffer, const Operator *
             uint bl = fetch(s2, x1, data->texture.colorTable);
             uint br = fetch(s2, x2, data->texture.colorTable);
 
+            int distx = (fx & 0x0000ffff) >> 8;
+            int disty = (fy & 0x0000ffff) >> 8;
+            int idistx = 256 - distx;
+            int idisty = 256 - disty;
+
             uint xtop = INTERPOLATE_PIXEL_256(tl, idistx, tr, distx);
             uint xbot = INTERPOLATE_PIXEL_256(bl, idistx, br, distx);
             *b = INTERPOLATE_PIXEL_256(xtop, idisty, xbot, disty);
@@ -753,9 +755,9 @@ const uint * QT_FASTCALL fetchTransformedBilinear(uint *buffer, const Operator *
             const qreal py = fy * iw - 0.5;
 
             int x1 = int(px) - (px < 0);
-            int x2 = x1 + 1;
+            int x2;
             int y1 = int(py) - (py < 0);
-            int y2 = y1 + 1;
+            int y2;
 
             int distx = int((px - x1) * 256);
             int disty = int((py - y1) * 256);
@@ -764,26 +766,26 @@ const uint * QT_FASTCALL fetchTransformedBilinear(uint *buffer, const Operator *
 
             if (blendType == BlendTransformedBilinearTiled) {
                 x1 %= image_width;
+                if (x1 < 0) x1 += image_width;
+                x2 = x1 + 1;
                 x2 %= image_width;
-                y1 %= image_height;
-                y2 %= image_height;
 
-                if (x1 < 0) x1 += image_width;
-                if (x2 < 0) x2 += image_width;
+                y1 %= image_height;
                 if (y1 < 0) y1 += image_height;
-                if (y2 < 0) y2 += image_height;
-
-                Q_ASSERT(x1 >= 0 && x1 < image_width);
-                Q_ASSERT(x2 >= 0 && x2 < image_width);
-                Q_ASSERT(y1 >= 0 && y1 < image_height);
-                Q_ASSERT(y2 >= 0 && y2 < image_height);
+                y2 = y1 + 1;
+                y2 %= image_height;
             } else {
                 x1 = qBound(0, x1, image_width - 1);
-                x2 = qBound(0, x2, image_width - 1);
+                x2 = qMin(x1 + 1, image_width - 1);
                 y1 = qBound(0, y1, image_height - 1);
-                y2 = qBound(0, y2, image_height - 1);
+                y2 = qMin(y1 + 1, image_height - 1);
             }
 
+            Q_ASSERT(x1 >= 0 && x1 < image_width);
+            Q_ASSERT(x2 >= 0 && x2 < image_width);
+            Q_ASSERT(y1 >= 0 && y1 < image_height);
+            Q_ASSERT(y2 >= 0 && y2 < image_height);
+
             const uchar *s1 = data->texture.scanLine(y1);
             const uchar *s2 = data->texture.scanLine(y2);
 
@@ -5141,7 +5143,7 @@ static void blend_tiled_rgb444(int count, const QSpan *spans, void *userData)
 }
 
 
-template <SpanMethod spanMethod>
+template <SpanMethod spanMethod, TextureBlendType blendType>  /* blendType must be either BlendTransformedBilinear or BlendTransformedBilinearTiled */
 Q_STATIC_TEMPLATE_FUNCTION void blend_transformed_bilinear_argb(int count, const QSpan *spans, void *userData)
 {
     QSpanData *data = reinterpret_cast<QSpanData *>(userData);
@@ -5154,10 +5156,12 @@ Q_STATIC_TEMPLATE_FUNCTION void blend_transformed_bilinear_argb(int count, const
     CompositionFunction func = functionForMode[data->rasterBuffer->compositionMode];
     uint buffer[buffer_size];
 
-    int image_x1 = data->texture.x1;
-    int image_y1 = data->texture.y1;
-    int image_x2 = data->texture.x2;
-    int image_y2 = data->texture.y2;
+    const int image_x1 = data->texture.x1;
+    const int image_y1 = data->texture.y1;
+    const int image_x2 = data->texture.x2;
+    const int image_y2 = data->texture.y2;
+    const int image_width = data->texture.width;
+    const int image_height = data->texture.height;
     const int scanline_offset = data->texture.bytesPerLine / 4;
 
     if (data->fast_matrix) {
@@ -5187,19 +5191,31 @@ Q_STATIC_TEMPLATE_FUNCTION void blend_transformed_bilinear_argb(int count, const
                 uint *b = buffer;
                 while (b < end) {
                     int x1 = (x >> 16);
-                    int x2 = x1 + 1;
+                    int x2;
                     int y1 = (y >> 16);
-                    int y2 = y1 + 1;
-
-                    int distx = ((x - (x1 << 16)) >> 8);
-                    int disty = ((y - (y1 << 16)) >> 8);
-                    int idistx = 256 - distx;
-                    int idisty = 256 - disty;
-
-                    x1 = qBound(image_x1, x1, image_x2 - 1);
-                    x2 = qBound(image_x1, x2, image_x2 - 1);
-                    y1 = qBound(image_y1, y1, image_y2 - 1);
-                    y2 = qBound(image_y1, y2, image_y2 - 1);
+                    int y2;
+
+                    if (blendType == BlendTransformedBilinearTiled) {
+                        x1 %= image_width;
+                        if (x1 < 0) x1 += image_width;
+                        x2 = x1 + 1;
+                        x2 %= image_width;
+
+                        y1 %= image_height;
+                        if (y1 < 0) y1 += image_height;
+                        y2 = y1 + 1;
+                        y2 %= image_height;
+
+                        Q_ASSERT(x1 >= 0 && x1 < image_width);
+                        Q_ASSERT(x2 >= 0 && x2 < image_width);
+                        Q_ASSERT(y1 >= 0 && y1 < image_height);
+                        Q_ASSERT(y2 >= 0 && y2 < image_height);
+                    } else {
+                        x1 = qBound(image_x1, x1, image_x2 - 1);
+                        x2 = qMin(x1 + 1, image_x2 - 1);
+                        y1 = qBound(image_y1, y1, image_y2 - 1);
+                        y2 = qMin(y1 + 1, image_y2 - 1);
+                    }
 
                     int y1_offset = y1 * scanline_offset;
                     int y2_offset = y2 * scanline_offset;
@@ -5216,6 +5232,11 @@ Q_STATIC_TEMPLATE_FUNCTION void blend_transformed_bilinear_argb(int count, const
                     uint br = image_bits[y2_offset + x2];
 #endif
 
+                    int distx = (x & 0x0000ffff) >> 8;
+                    int disty = (y & 0x0000ffff) >> 8;
+                    int idistx = 256 - distx;
+                    int idisty = 256 - disty;
+
                     uint xtop = INTERPOLATE_PIXEL_256(tl, idistx, tr, distx);
                     uint xbot = INTERPOLATE_PIXEL_256(bl, idistx, br, distx);
                     *b = INTERPOLATE_PIXEL_256(xtop, idisty, xbot, disty);
@@ -5265,19 +5286,36 @@ Q_STATIC_TEMPLATE_FUNCTION void blend_transformed_bilinear_argb(int count, const
                     const qreal py = y * iw - 0.5;
 
                     int x1 = int(px) - (px < 0);
-                    int x2 = x1 + 1;
+                    int x2;
                     int y1 = int(py) - (py < 0);
-                    int y2 = y1 + 1;
+                    int y2;
 
                     int distx = int((px - x1) * 256);
                     int disty = int((py - y1) * 256);
                     int idistx = 256 - distx;
                     int idisty = 256 - disty;
 
-                    x1 = qBound(image_x1, x1, image_x2 - 1);
-                    x2 = qBound(image_x1, x2, image_x2 - 1);
-                    y1 = qBound(image_y1, y1, image_y2 - 1);
-                    y2 = qBound(image_y1, y2, image_y2 - 1);
+                    if (blendType == BlendTransformedBilinearTiled) {
+                        x1 %= image_width;
+                        if (x1 < 0) x1 += image_width;
+                        x2 = x1 + 1;
+                        x2 %= image_width;
+
+                        y1 %= image_height;
+                        if (y1 < 0) y1 += image_height;
+                        y2 = y1 + 1;
+                        y2 %= image_height;
+
+                        Q_ASSERT(x1 >= 0 && x1 < image_width);
+                        Q_ASSERT(x2 >= 0 && x2 < image_width);
+                        Q_ASSERT(y1 >= 0 && y1 < image_height);
+                        Q_ASSERT(y2 >= 0 && y2 < image_height);
+                    } else {
+                        x1 = qBound(image_x1, x1, image_x2 - 1);
+                        x2 = qMin(x1 + 1, image_x2 - 1);
+                        y1 = qBound(image_y1, y1, image_y2 - 1);
+                        y2 = qMin(y1 + 1, image_y2 - 1);
+                    }
 
                     int y1_offset = y1 * scanline_offset;
                     int y2_offset = y2 * scanline_offset;
@@ -5370,8 +5408,9 @@ Q_STATIC_TEMPLATE_FUNCTION void blendTransformedBilinear(int count, const QSpan
                     int y1 = (y >> 16);
                     int y2 = y1 + 1;
 
-                    const int distx = ((x - (x1 << 16)) >> 8);
-                    const int disty = ((y - (y1 << 16)) >> 8);
+                    const int distx = (x & 0x0000ffff) >> 8;
+                    const int disty = (y & 0x0000ffff) >> 8;
+
                     x1 = qBound(src_minx, x1, src_maxx);
                     x2 = qBound(src_minx, x2, src_maxx);
                     y1 = qBound(src_miny, y1, src_maxy);
@@ -5646,197 +5685,6 @@ static void blend_transformed_bilinear_rgb444(int count, const QSpan *spans, voi
 }
 
 template <SpanMethod spanMethod>
-Q_STATIC_TEMPLATE_FUNCTION void blend_transformed_bilinear_tiled_argb(int count, const QSpan *spans, void *userData)
-{
-    QSpanData *data = reinterpret_cast<QSpanData *>(userData);
-    if (data->texture.format != QImage::Format_ARGB32_Premultiplied
-        && data->texture.format != QImage::Format_RGB32) {
-        blend_src_generic<spanMethod>(count, spans, userData);
-        return;
-    }
-
-    CompositionFunction func = functionForMode[data->rasterBuffer->compositionMode];
-    uint buffer[buffer_size];
-
-    int image_width = data->texture.width;
-    int image_height = data->texture.height;
-    const int scanline_offset = data->texture.bytesPerLine / 4;
-
-    if (data->fast_matrix) {
-        // The increment pr x in the scanline
-        int fdx = (int)(data->m11 * fixed_scale);
-        int fdy = (int)(data->m12 * fixed_scale);
-
-        while (count--) {
-            void *t = data->rasterBuffer->scanLine(spans->y);
-
-            uint *target = ((uint *)t) + spans->x;
-            uint *image_bits = (uint *)data->texture.imageData;
-
-            const qreal cx = spans->x + 0.5;
-            const qreal cy = spans->y + 0.5;
-
-            int x = int((data->m21 * cy
-                         + data->m11 * cx + data->dx) * fixed_scale) - half_point;
-            int y = int((data->m22 * cy
-                         + data->m12 * cx + data->dy) * fixed_scale) - half_point;
-
-            int length = spans->len;
-            const int coverage = (spans->coverage * data->texture.const_alpha) >> 8;
-            while (length) {
-                int l = qMin(length, buffer_size);
-                const uint *end = buffer + l;
-                uint *b = buffer;
-                while (b < end) {
-                    int x1 = (x >> 16);
-                    int x2 = (x1 + 1);
-                    int y1 = (y >> 16);
-                    int y2 = (y1 + 1);
-
-                    int distx = ((x - (x1 << 16)) >> 8);
-                    int disty = ((y - (y1 << 16)) >> 8);
-                    int idistx = 256 - distx;
-                    int idisty = 256 - disty;
-
-                    x1 %= image_width;
-                    x2 %= image_width;
-                    y1 %= image_height;
-                    y2 %= image_height;
-
-                    if (x1 < 0) x1 += image_width;
-                    if (x2 < 0) x2 += image_width;
-                    if (y1 < 0) y1 += image_height;
-                    if (y2 < 0) y2 += image_height;
-
-                    Q_ASSERT(x1 >= 0 && x1 < image_width);
-                    Q_ASSERT(x2 >= 0 && x2 < image_width);
-                    Q_ASSERT(y1 >= 0 && y1 < image_height);
-                    Q_ASSERT(y2 >= 0 && y2 < image_height);
-
-                    int y1_offset = y1 * scanline_offset;
-                    int y2_offset = y2 * scanline_offset;
-
-#if defined(Q_IRIX_GCC3_3_WORKAROUND)
-                    uint tl = gccBug(image_bits[y1_offset + x1]);
-                    uint tr = gccBug(image_bits[y1_offset + x2]);
-                    uint bl = gccBug(image_bits[y2_offset + x1]);
-                    uint br = gccBug(image_bits[y2_offset + x2]);
-#else
-                    uint tl = image_bits[y1_offset + x1];
-                    uint tr = image_bits[y1_offset + x2];
-                    uint bl = image_bits[y2_offset + x1];
-                    uint br = image_bits[y2_offset + x2];
-#endif
-
-                    uint xtop = INTERPOLATE_PIXEL_256(tl, idistx, tr, distx);
-                    uint xbot = INTERPOLATE_PIXEL_256(bl, idistx, br, distx);
-                    *b = INTERPOLATE_PIXEL_256(xtop, idisty, xbot, disty);
-                    ++b;
-                    x += fdx;
-                    y += fdy;
-                }
-                if (spanMethod == RegularSpans)
-                    func(target, buffer, l, coverage);
-                else
-                    drawBufferSpan(data, buffer, buffer_size,
-                                   spans->x + spans->len - length,
-                                   spans->y, l, coverage);
-                target += l;
-                length -= l;
-            }
-            ++spans;
-        }
-    } else {
-        const qreal fdx = data->m11;
-        const qreal fdy = data->m12;
-        const qreal fdw = data->m13;
-        while (count--) {
-            void *t = data->rasterBuffer->scanLine(spans->y);
-
-            uint *target = ((uint *)t) + spans->x;
-            uint *image_bits = (uint *)data->texture.imageData;
-
-            const qreal cx = spans->x + 0.5;
-            const qreal cy = spans->y + 0.5;
-
-            qreal x = data->m21 * cy + data->m11 * cx + data->dx;
-            qreal y = data->m22 * cy + data->m12 * cx + data->dy;
-            qreal w = data->m23 * cy + data->m13 * cx + data->m33;
-
-            int length = spans->len;
-            const int coverage = (spans->coverage * data->texture.const_alpha) >> 8;
-            while (length) {
-                int l = qMin(length, buffer_size);
-                const uint *end = buffer + l;
-                uint *b = buffer;
-                while (b < end) {
-                    const qreal iw = w == 0 ? 1 : 1 / w;
-                    const qreal px = x * iw - 0.5;
-                    const qreal py = y * iw - 0.5;
-
-                    int x1 = int(px) - (px < 0);
-                    int x2 = x1 + 1;
-                    int y1 = int(py) - (py < 0);
-                    int y2 = y1 + 1;
-
-                    int distx = int((px - x1) * 256);
-                    int disty = int((py - y1) * 256);
-                    int idistx = 256 - distx;
-                    int idisty = 256 - disty;
-
-                    x1 %= image_width;
-                    x2 %= image_width;
-                    y1 %= image_height;
-                    y2 %= image_height;
-
-                    if (x1 < 0) x1 += image_width;
-                    if (x2 < 0) x2 += image_width;
-                    if (y1 < 0) y1 += image_height;
-                    if (y2 < 0) y2 += image_height;
-
-                    Q_ASSERT(x1 >= 0 && x1 < image_width);
-                    Q_ASSERT(x2 >= 0 && x2 < image_width);
-                    Q_ASSERT(y1 >= 0 && y1 < image_height);
-                    Q_ASSERT(y2 >= 0 && y2 < image_height);
-
-                    int y1_offset = y1 * scanline_offset;
-                    int y2_offset = y2 * scanline_offset;
-
-#if defined(Q_IRIX_GCC3_3_WORKAROUND)
-                    uint tl = gccBug(image_bits[y1_offset + x1]);
-                    uint tr = gccBug(image_bits[y1_offset + x2]);
-                    uint bl = gccBug(image_bits[y2_offset + x1]);
-                    uint br = gccBug(image_bits[y2_offset + x2]);
-#else
-                    uint tl = image_bits[y1_offset + x1];
-                    uint tr = image_bits[y1_offset + x2];
-                    uint bl = image_bits[y2_offset + x1];
-                    uint br = image_bits[y2_offset + x2];
-#endif
-
-                    uint xtop = INTERPOLATE_PIXEL_256(tl, idistx, tr, distx);
-                    uint xbot = INTERPOLATE_PIXEL_256(bl, idistx, br, distx);
-                    *b = INTERPOLATE_PIXEL_256(xtop, idisty, xbot, disty);
-                    ++b;
-                    x += fdx;
-                    y += fdy;
-                    w += fdw;
-                }
-                if (spanMethod == RegularSpans)
-                    func(target, buffer, l, coverage);
-                else
-                    drawBufferSpan(data, buffer, buffer_size,
-                                   spans->x + spans->len - length,
-                                   spans->y, l, coverage);
-                target += l;
-                length -= l;
-            }
-            ++spans;
-        }
-    }
-}
-
-template <SpanMethod spanMethod>
 Q_STATIC_TEMPLATE_FUNCTION void blend_transformed_argb(int count, const QSpan *spans, void *userData)
 {
     QSpanData *data = reinterpret_cast<QSpanData *>(userData);
@@ -6738,7 +6586,7 @@ static const ProcessSpans processTextureSpans[NBlendTypes][QImage::NImageFormats
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // Indexed8
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // RGB32
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // ARGB32
-        SPANFUNC_POINTER(blend_transformed_bilinear_argb, RegularSpans), // ARGB32_Premultiplied
+        blend_transformed_bilinear_argb<RegularSpans, BlendTransformedBilinear>, // ARGB32_Premultiplied
         blend_transformed_bilinear_rgb565,
         blend_transformed_bilinear_argb8565,
         blend_transformed_bilinear_rgb666,
@@ -6757,7 +6605,7 @@ static const ProcessSpans processTextureSpans[NBlendTypes][QImage::NImageFormats
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // Indexed8
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // RGB32
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // ARGB32
-        SPANFUNC_POINTER(blend_transformed_bilinear_tiled_argb, RegularSpans), // ARGB32_Premultiplied
+        blend_transformed_bilinear_argb<RegularSpans, BlendTransformedBilinearTiled>, // ARGB32_Premultiplied
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // RGB16
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // ARGB8565_Premultiplied
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // RGB666
@@ -6856,7 +6704,7 @@ static const ProcessSpans processTextureSpansCallback[NBlendTypes][QImage::NImag
         blend_src_generic<CallbackSpans>,   // Indexed8
         blend_src_generic<CallbackSpans>,   // RGB32
         blend_src_generic<CallbackSpans>,   // ARGB32
-        blend_transformed_bilinear_argb<CallbackSpans>, // ARGB32_Premultiplied
+        blend_transformed_bilinear_argb<CallbackSpans, BlendTransformedBilinear>, // ARGB32_Premultiplied
         blend_src_generic<CallbackSpans>,   // RGB16
         blend_src_generic<CallbackSpans>,   // ARGB8565_Premultiplied
         blend_src_generic<CallbackSpans>,   // RGB666
@@ -6875,7 +6723,7 @@ static const ProcessSpans processTextureSpansCallback[NBlendTypes][QImage::NImag
         blend_src_generic<CallbackSpans>,   // Indexed8
         blend_src_generic<CallbackSpans>,   // RGB32
         blend_src_generic<CallbackSpans>,   // ARGB32
-        blend_transformed_bilinear_tiled_argb<CallbackSpans>, // ARGB32_Premultiplied
+        blend_transformed_bilinear_argb<CallbackSpans, BlendTransformedBilinearTiled>, // ARGB32_Premultiplied
         blend_src_generic<CallbackSpans>,   // RGB16
         blend_src_generic<CallbackSpans>,   // ARGB8565_Premultiplied
         blend_src_generic<CallbackSpans>,   // RGB666
@@ -7135,6 +6983,11 @@ void qt_build_pow_tables() {
     int winSmooth;
     if (SystemParametersInfo(0x200C /* SPI_GETFONTSMOOTHINGCONTRAST */, 0, &winSmooth, 0))
         smoothing = winSmooth / 1000.0;
+
+    // Safeguard ourselves against corrupt registry values...
+    if (smoothing > 5 || smoothing < 1)
+        smoothing = 1.4;
+
 #endif
 
 #ifdef Q_WS_X11
diff --git a/src/gui/painting/qpathclipper.cpp b/src/gui/painting/qpathclipper.cpp
index 949a820..00e74ba 100644
--- a/src/gui/painting/qpathclipper.cpp
+++ b/src/gui/painting/qpathclipper.cpp
@@ -935,10 +935,9 @@ qreal QWingedEdge::delta(int vertex, int a, int b) const
 
     qreal result = b_angle - a_angle;
 
-    if (qFuzzyIsNull(result) || qFuzzyCompare(result, 128))
-        return 0;
-
-    if (result < 0)
+    if (result >= 128.)
+        return result - 128.;
+    else if (result < 0)
         return result + 128.;
     else
         return result;
diff --git a/src/gui/styles/qgtkstyle_p.h b/src/gui/styles/qgtkstyle_p.h
index 5bb7550..68a04e9 100644
--- a/src/gui/styles/qgtkstyle_p.h
+++ b/src/gui/styles/qgtkstyle_p.h
@@ -85,9 +85,14 @@ public:
     int size() const { return m_size; }
     const char *data() const { return m_data; }
 
+#ifdef __SUNPRO_CC
+        QHashableLatin1Literal(const char* str)
+        : m_size(strlen(str)), m_data(str) {}
+#else
     template <int N>
         QHashableLatin1Literal(const char (&str)[N])
         : m_size(N - 1), m_data(str) {}
+#endif
 
     QHashableLatin1Literal(const QHashableLatin1Literal &other)
         : m_size(other.m_size), m_data(other.m_data)
diff --git a/src/gui/text/qfont.cpp b/src/gui/text/qfont.cpp
index 99b9f40..cb16a16 100644
--- a/src/gui/text/qfont.cpp
+++ b/src/gui/text/qfont.cpp
@@ -2614,8 +2614,10 @@ void QFontCache::cleanup()
     } QT_CATCH (const std::bad_alloc &) {
         // no cache - just ignore
     }
-    if (cache && cache->hasLocalData())
+    if (cache && cache->hasLocalData()) {
+        cache->localData()->clear();
         cache->setLocalData(0);
+        }
 }
 #endif // QT_NO_THREAD
 
diff --git a/src/gui/text/qfontdatabase_x11.cpp b/src/gui/text/qfontdatabase_x11.cpp
index b1ab478..3b2e4e9 100644
--- a/src/gui/text/qfontdatabase_x11.cpp
+++ b/src/gui/text/qfontdatabase_x11.cpp
@@ -1939,8 +1939,13 @@ void QFontDatabase::load(const QFontPrivate *d, int script)
             fe = loadFc(d, script, req);
 
             if (fe != 0 && fe->fontDef.pixelSize != req.pixelSize) {
-                delete fe;
-                fe = loadXlfd(d->screen, script, req);
+                QFontEngine *xlfdFontEngine = loadXlfd(d->screen, script, req);
+                if (xlfdFontEngine->fontDef.family == fe->fontDef.family) {
+                    delete fe;
+                    fe = xlfdFontEngine;
+                } else {
+                    delete xlfdFontEngine;
+                }
             }
 
 
diff --git a/src/gui/text/qfontengine_s60.cpp b/src/gui/text/qfontengine_s60.cpp
index 3ea084b..c9ff661 100644
--- a/src/gui/text/qfontengine_s60.cpp
+++ b/src/gui/text/qfontengine_s60.cpp
@@ -79,6 +79,31 @@ QByteArray QFontEngineS60Extensions::getSfntTable(uint tag) const
     return result;
 }
 
+bool QFontEngineS60Extensions::getSfntTableData(uint tag, uchar *buffer, uint *length) const
+{
+    if (!m_trueTypeExtension->HasTrueTypeTable(tag))
+        return false;
+
+    bool result = true;
+    TInt error = KErrNone;
+    TInt tableByteLength;
+    TAny *table =
+        q_check_ptr(m_trueTypeExtension->GetTrueTypeTable(error, tag, &tableByteLength));
+
+    if (error != KErrNone) {
+        return false;
+    } else if (*length > 0 && *length < tableByteLength) {
+        result = false; // Caller did not allocate enough memory
+    } else {
+        *length = tableByteLength;
+        if (buffer)
+            qMemCopy(buffer, table, tableByteLength);
+    }
+
+    m_trueTypeExtension->ReleaseTrueTypeTable(table);
+    return result;
+}
+
 const unsigned char *QFontEngineS60Extensions::cmap() const
 {
     if (!m_cmap) {
@@ -326,6 +351,11 @@ QByteArray QFontEngineS60::getSfntTable(uint tag) const
     return m_extensions->getSfntTable(tag);
 }
 
+bool QFontEngineS60::getSfntTableData(uint tag, uchar *buffer, uint *length) const
+{
+    return m_extensions->getSfntTableData(tag, buffer, length);
+}
+
 QFontEngine::Type QFontEngineS60::type() const
 {
     return QFontEngine::S60FontEngine;
diff --git a/src/gui/text/qfontengine_s60_p.h b/src/gui/text/qfontengine_s60_p.h
index 5834cc4..a80af4d 100644
--- a/src/gui/text/qfontengine_s60_p.h
+++ b/src/gui/text/qfontengine_s60_p.h
@@ -69,6 +69,7 @@ public:
     QFontEngineS60Extensions(CFont* fontOwner, COpenFont *font);
 
     QByteArray getSfntTable(uint tag) const;
+    bool getSfntTableData(uint tag, uchar *buffer, uint *length) const;
     const unsigned char *cmap() const;
     QPainterPath glyphOutline(glyph_t glyph) const;
     CFont *fontOwner() const;
@@ -106,6 +107,7 @@ public:
     qreal minRightBearing() const { return 0; }
 
     QByteArray getSfntTable(uint tag) const;
+    bool getSfntTableData(uint tag, uchar *buffer, uint *length) const;
 
     static qreal pixelsToPoints(qreal pixels, Qt::Orientation orientation = Qt::Horizontal);
     static qreal pointsToPixels(qreal points, Qt::Orientation orientation = Qt::Horizontal);
diff --git a/src/gui/text/qtextengine.cpp b/src/gui/text/qtextengine.cpp
index 7dc2c26..6485966 100644
--- a/src/gui/text/qtextengine.cpp
+++ b/src/gui/text/qtextengine.cpp
@@ -1647,7 +1647,7 @@ glyph_metrics_t QTextEngine::boundingBox(int from,  int len) const
                 }
             }
 
-            glyph_t glyph = glyphs.glyphs[logClusters[pos + ilen - 1]];
+            glyph_t glyph = glyphs.glyphs[logClusters[ilen - 1]];
             glyph_metrics_t gi = fe->boundingBox(glyph);
             if (gi.isValid())
                 gm.width -= qRound(gi.xoff - gi.x - gi.width);
diff --git a/src/gui/util/qcompleter.cpp b/src/gui/util/qcompleter.cpp
index c095b3b..8e7ec80 100644
--- a/src/gui/util/qcompleter.cpp
+++ b/src/gui/util/qcompleter.cpp
@@ -1689,8 +1689,10 @@ QString QCompleter::pathFromIndex(const QModelIndex& index) const
         QString t;
         if (isDirModel)
             t = sourceModel->data(idx, Qt::EditRole).toString();
+#ifndef QT_NO_FILESYSTEMMODEL
         else
             t = sourceModel->data(idx, QFileSystemModel::FileNameRole).toString();
+#endif
         list.prepend(t);
         QModelIndex parent = idx.parent();
         idx = parent.sibling(parent.row(), index.column());
diff --git a/src/gui/widgets/qdialogbuttonbox.cpp b/src/gui/widgets/qdialogbuttonbox.cpp
index cc74a53..732dbc9 100644
--- a/src/gui/widgets/qdialogbuttonbox.cpp
+++ b/src/gui/widgets/qdialogbuttonbox.cpp
@@ -258,6 +258,7 @@ static const int layouts[2][5][14] =
     }
 };
 
+#if defined(QT_SOFTKEYS_ENABLED) && !defined(QT_NO_ACTION)
 class QDialogButtonEnabledProxy : public QObject
 {
 public:
@@ -281,7 +282,7 @@ private:
     QWidget *source;
     QAction *target;
 };
-
+#endif
 
 class QDialogButtonBoxPrivate : public QWidgetPrivate
 {
@@ -314,7 +315,7 @@ public:
     void addButtonsToLayout(const QList<QAbstractButton *> &buttonList, bool reverse);
     void retranslateStrings();
     const char *standardButtonText(QDialogButtonBox::StandardButton sbutton) const;
-#ifdef QT_SOFTKEYS_ENABLED
+#if defined(QT_SOFTKEYS_ENABLED) && !defined(QT_NO_ACTION)
     QAction *createSoftKey(QAbstractButton *button, QDialogButtonBox::ButtonRole role);
 #endif
 };
@@ -571,7 +572,7 @@ void QDialogButtonBoxPrivate::addButton(QAbstractButton *button, QDialogButtonBo
     QObject::connect(button, SIGNAL(clicked()), q, SLOT(_q_handleButtonClicked()));
     QObject::connect(button, SIGNAL(destroyed()), q, SLOT(_q_handleButtonDestroyed()));
     buttonLists[role].append(button);
-#ifdef QT_SOFTKEYS_ENABLED
+#if defined(QT_SOFTKEYS_ENABLED) && !defined(QT_NO_ACTION)
     QAction *action = createSoftKey(button, role);
     softKeyActions.insert(button, action);
     new QDialogButtonEnabledProxy(action, button, action);
@@ -580,7 +581,7 @@ void QDialogButtonBoxPrivate::addButton(QAbstractButton *button, QDialogButtonBo
         layoutButtons();
 }
 
-#ifdef QT_SOFTKEYS_ENABLED
+#if defined(QT_SOFTKEYS_ENABLED) && !defined(QT_NO_ACTION)
 QAction* QDialogButtonBoxPrivate::createSoftKey(QAbstractButton *button, QDialogButtonBox::ButtonRole role)
 {
     Q_Q(QDialogButtonBox);
@@ -718,7 +719,7 @@ void QDialogButtonBoxPrivate::retranslateStrings()
         if (buttonText) {
             QPushButton *button = it.key();
             button->setText(QDialogButtonBox::tr(buttonText));
-#ifdef QT_SOFTKEYS_ENABLED
+#if defined(QT_SOFTKEYS_ENABLED) && !defined(QT_NO_ACTION)
             QAction *action = softKeyActions.value(button, 0);
             if (action)
                 action->setText(button->text());
@@ -997,7 +998,7 @@ void QDialogButtonBox::removeButton(QAbstractButton *button)
             }
         }
     }
-#ifdef QT_SOFTKEYS_ENABLED
+#if defined(QT_SOFTKEYS_ENABLED) && !defined(QT_NO_ACTION)
     QAction *action = d->softKeyActions.value(button, 0);
     if (action) {
         d->softKeyActions.remove(button);
@@ -1243,7 +1244,7 @@ bool QDialogButtonBox::event(QEvent *event)
     }else if (event->type() == QEvent::LanguageChange) {
         d->retranslateStrings();
     }
-#ifdef QT_SOFTKEYS_ENABLED
+#if defined(QT_SOFTKEYS_ENABLED) && !defined(QT_NO_ACTION)
     else if (event->type() == QEvent::ParentChange) {
         QWidget *dialog = 0;
         QWidget *p = this;
diff --git a/src/gui/widgets/qframe.cpp b/src/gui/widgets/qframe.cpp
index c2e4b35..f51ddfd 100644
--- a/src/gui/widgets/qframe.cpp
+++ b/src/gui/widgets/qframe.cpp
@@ -244,7 +244,7 @@ QFrame::~QFrame()
 /*!
     Returns the frame style.
 
-    The default value is QFrame::NoFrame.
+    The default value is QFrame::Plain.
 
     \sa setFrameStyle(), frameShape(), frameShadow()
 */
diff --git a/src/gui/widgets/qmenubar.cpp b/src/gui/widgets/qmenubar.cpp
index e368d3d..a13a2fa 100644
--- a/src/gui/widgets/qmenubar.cpp
+++ b/src/gui/widgets/qmenubar.cpp
@@ -268,19 +268,15 @@ void QMenuBarPrivate::updateGeometries()
 
 QRect QMenuBarPrivate::actionRect(QAction *act) const
 {
-    Q_Q(const QMenuBar);
     const int index = actions.indexOf(act);
-    if (index == -1)
-        return QRect();
 
     //makes sure the geometries are up-to-date
     const_cast<QMenuBarPrivate*>(this)->updateGeometries();
 
-    if (index >= actionRects.count())
+    if (index < 0 || index >= actionRects.count())
         return QRect(); // that can happen in case of native menubar
 
-    QRect ret = actionRects.at(index);
-    return QStyle::visualRect(q->layoutDirection(), q->rect(), ret);
+    return actionRects.at(index);
 }
 
 void QMenuBarPrivate::focusFirstAction()
@@ -505,6 +501,9 @@ void QMenuBarPrivate::calcActionRects(int max_width, int start) const
 
         //keep moving along..
         x += rect.width() + itemSpacing;
+
+        //make sure we follow the layout direction
+        rect = QStyle::visualRect(q->layoutDirection(), q->rect(), rect);
     }
 }
 
diff --git a/src/gui/widgets/qsizegrip.cpp b/src/gui/widgets/qsizegrip.cpp
index c9d613a..40f3129 100644
--- a/src/gui/widgets/qsizegrip.cpp
+++ b/src/gui/widgets/qsizegrip.cpp
@@ -78,15 +78,6 @@ static QWidget *qt_sizegrip_topLevelWidget(QWidget* w)
     return w;
 }
 
-static inline bool hasHeightForWidth(QWidget *widget)
-{
-    if (!widget)
-        return false;
-    if (QLayout *layout = widget->layout())
-        return layout->hasHeightForWidth();
-    return widget->sizePolicy().hasHeightForWidth();
-}
-
 class QSizeGripPrivate : public QWidgetPrivate
 {
     Q_DECLARE_PUBLIC(QSizeGrip)
@@ -318,7 +309,7 @@ void QSizeGrip::mousePressEvent(QMouseEvent * e)
 #ifdef Q_WS_X11
     // Use a native X11 sizegrip for "real" top-level windows if supported.
     if (tlw->isWindow() && X11->isSupportedByWM(ATOM(_NET_WM_MOVERESIZE))
-        && !tlw->testAttribute(Qt::WA_DontShowOnScreen) && !hasHeightForWidth(tlw)) {
+        && !tlw->testAttribute(Qt::WA_DontShowOnScreen) && !tlw->hasHeightForWidth()) {
         XEvent xev;
         xev.xclient.type = ClientMessage;
         xev.xclient.message_type = ATOM(_NET_WM_MOVERESIZE);
@@ -340,7 +331,7 @@ void QSizeGrip::mousePressEvent(QMouseEvent * e)
     }
 #endif // Q_WS_X11
 #ifdef Q_WS_WIN
-    if (tlw->isWindow() && !tlw->testAttribute(Qt::WA_DontShowOnScreen) && !hasHeightForWidth(tlw)) {
+    if (tlw->isWindow() && !tlw->testAttribute(Qt::WA_DontShowOnScreen) && !tlw->hasHeightForWidth()) {
         uint orientation = 0;
         if (d->atBottom())
             orientation = d->atLeft() ? SZ_SIZEBOTTOMLEFT : SZ_SIZEBOTTOMRIGHT;
@@ -429,12 +420,12 @@ void QSizeGrip::mouseMoveEvent(QMouseEvent * e)
 
 #ifdef Q_WS_X11
     if (tlw->isWindow() && X11->isSupportedByWM(ATOM(_NET_WM_MOVERESIZE))
-        && tlw->isTopLevel() && !tlw->testAttribute(Qt::WA_DontShowOnScreen) && !hasHeightForWidth(tlw))
+        && tlw->isTopLevel() && !tlw->testAttribute(Qt::WA_DontShowOnScreen) && !tlw->hasHeightForWidth())
         return;
 #endif
 #ifdef Q_WS_WIN
     if (tlw->isWindow() && GetSystemMenu(tlw->winId(), FALSE) != 0 && internalWinId()
-        && !tlw->testAttribute(Qt::WA_DontShowOnScreen) && !hasHeightForWidth(tlw)) {
+        && !tlw->testAttribute(Qt::WA_DontShowOnScreen) && !tlw->hasHeightForWidth()) {
         MSG msg;
         while(PeekMessage(&msg, winId(), WM_MOUSEMOVE, WM_MOUSEMOVE, PM_REMOVE));
         return;
diff --git a/src/gui/widgets/qtabwidget.cpp b/src/gui/widgets/qtabwidget.cpp
index 047a905..fb7ca64 100644
--- a/src/gui/widgets/qtabwidget.cpp
+++ b/src/gui/widgets/qtabwidget.cpp
@@ -195,6 +195,7 @@ public:
     void _q_removeTab(int);
     void _q_tabMoved(int from, int to);
     void init();
+    bool hasHeightForWidth() const;
 
     QTabBar *tabs;
     QStackedWidget *stack;
@@ -871,6 +872,46 @@ QSize QTabWidget::minimumSizeHint() const
                     .expandedTo(QApplication::globalStrut());
 }
 
+int QTabWidget::heightForWidth(int width) const
+{
+    Q_D(const QTabWidget);
+    QStyleOption opt(0);
+    opt.init(this);
+    opt.state = QStyle::State_None;
+
+    QSize zero(0,0);
+    const QSize padding = style()->sizeFromContents(QStyle::CT_TabWidget, &opt, zero, this)
+                                  .expandedTo(QApplication::globalStrut());
+
+    QSize lc(0, 0), rc(0, 0);
+    if (d->leftCornerWidget)
+        lc = d->leftCornerWidget->sizeHint();
+    if(d->rightCornerWidget)
+        rc = d->rightCornerWidget->sizeHint();
+    if (!d->dirty) {
+        QTabWidget *that = (QTabWidget*)this;
+        that->setUpLayout(true);
+    }
+    QSize t(d->tabs->sizeHint());
+
+    if(usesScrollButtons())
+        t = t.boundedTo(QSize(200,200));
+    else
+        t = t.boundedTo(QApplication::desktop()->size());
+
+    const bool tabIsHorizontal = (d->pos == North || d->pos == South);
+    const int contentsWidth = width - padding.width();
+    int stackWidth = contentsWidth;
+    if (!tabIsHorizontal)
+        stackWidth -= qMax(t.width(), qMax(lc.width(), rc.width()));
+
+    int stackHeight = d->stack->heightForWidth(stackWidth);
+    QSize s(stackWidth, stackHeight);
+
+    QSize contentSize = basicSize(tabIsHorizontal, lc, rc, s, t);
+    return (contentSize + padding).expandedTo(QApplication::globalStrut()).height();
+}
+
 /*!
     \reimp
  */
@@ -903,6 +944,14 @@ void QTabWidgetPrivate::updateTabBarPosition()
     q->setUpLayout();
 }
 
+bool QTabWidgetPrivate::hasHeightForWidth() const
+{
+    bool has = size_policy.hasHeightForWidth();
+    if (!has && stack)
+        has = stack->hasHeightForWidth();
+    return has;
+}
+
 /*!
     \property QTabWidget::tabPosition
     \brief the position of the tabs in this tab widget
diff --git a/src/gui/widgets/qtabwidget.h b/src/gui/widgets/qtabwidget.h
index 68200c8..ee50655 100644
--- a/src/gui/widgets/qtabwidget.h
+++ b/src/gui/widgets/qtabwidget.h
@@ -129,6 +129,7 @@ public:
 
     QSize sizeHint() const;
     QSize minimumSizeHint() const;
+    int heightForWidth(int width) const;
 
     void setCornerWidget(QWidget * w, Qt::Corner corner = Qt::TopRightCorner);
     QWidget * cornerWidget(Qt::Corner corner = Qt::TopRightCorner) const;