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

* '4.7' of scm.dev.nokia.troll.no:qt/oslo-staging-2: (33 commits)
  Compile fix on Windows.
  Remove an unnecessary assert.
  Documentation for the Pad Navigator Example.
  New Pad Nagivator example implementation.
  Skip definition of wintab functions in case of QT_NO_TABLETEVENT.
  Made curve tesselation be dynamically adjusted based on transform.
  Modified QPainter and QPixmap benchmarks to use raster pixmaps.
  Stabilize tst_QWidgetAction::visibilityUpdate
  Fix compiler warning in QT_REQUIRE_VERSION
  Stabilize tst_QColumnView::parentCurrentIndex
  Really fix tst_QDockWidget::taskQTBUG_9758_undockedGeometry on Linux
  Fix typos in Elastic Nodes example documentation.
  Made paint engine texture drawing work in GL ES 2 and updated docs.
  Opt out of visual-config size checks with extension
  Fix off-by-one in text layouts and widget size hints on Mac
  Stabilize tst_QDockWidget::taskQTBUG_9758_undockedGeometry
  Mark QFileDialog::Options as a Q_FLAGS
  fix tst_QDockWidget::taskQTBUG_9758_undockedGeometry on Linux
  Fixed scrolling bugs in widget graphics effect backend.
  Fixed source pixmap bug in widget graphics effect backend.
  ...

29 files changed, 273 insertions, 394 deletions

diff --git a/src/gui/dialogs/qfiledialog.h b/src/gui/dialogs/qfiledialog.h
index 97fac4e..16cb317 100644
--- a/src/gui/dialogs/qfiledialog.h
+++ b/src/gui/dialogs/qfiledialog.h
@@ -67,6 +67,7 @@ class Q_GUI_EXPORT QFileDialog : public QDialog
 {
     Q_OBJECT
     Q_ENUMS(ViewMode FileMode AcceptMode Option)
+    Q_FLAGS(Options)
     Q_PROPERTY(ViewMode viewMode READ viewMode WRITE setViewMode)
     Q_PROPERTY(FileMode fileMode READ fileMode WRITE setFileMode)
     Q_PROPERTY(AcceptMode acceptMode READ acceptMode WRITE setAcceptMode)
diff --git a/src/gui/dialogs/qmessagebox.h b/src/gui/dialogs/qmessagebox.h
index bc6170d..f1ff6cc 100644
--- a/src/gui/dialogs/qmessagebox.h
+++ b/src/gui/dialogs/qmessagebox.h
@@ -354,7 +354,7 @@ if (!qApp){ \
 QString s = QApplication::tr("Executable '%1' requires Qt "\
  "%2, found Qt %3.").arg(qAppName()).arg(QString::fromLatin1(\
 str)).arg(QString::fromLatin1(qVersion())); QMessageBox::critical(0, QApplication::tr(\
-"Incompatible Qt Library Error"), s, QMessageBox::Abort, 0); qFatal(s.toLatin1().data()); }}
+"Incompatible Qt Library Error"), s, QMessageBox::Abort, 0); qFatal("%s", s.toLatin1().data()); }}
 
 #endif // QT_NO_MESSAGEBOX
 
diff --git a/src/gui/effects/qgraphicseffect.cpp b/src/gui/effects/qgraphicseffect.cpp
index ce4ce6a..5e4e49e 100644
--- a/src/gui/effects/qgraphicseffect.cpp
+++ b/src/gui/effects/qgraphicseffect.cpp
@@ -326,7 +326,7 @@ QPixmap QGraphicsEffectSource::pixmap(Qt::CoordinateSystem system, QPoint *offse
     }
 
     QPixmap pm;
-    if (d->m_cachedSystem == system && d->m_cachedMode == mode)
+    if (item && d->m_cachedSystem == system && d->m_cachedMode == mode)
         QPixmapCache::find(d->m_cacheKey, &pm);
 
     if (pm.isNull()) {
diff --git a/src/gui/egl/qegl_qws.cpp b/src/gui/egl/qegl_qws.cpp
index 56383a5..50db397 100644
--- a/src/gui/egl/qegl_qws.cpp
+++ b/src/gui/egl/qegl_qws.cpp
@@ -94,7 +94,7 @@ void QEglProperties::setPaintDeviceFormat(QPaintDevice *dev)
 
 EGLNativeDisplayType QEgl::nativeDisplay()
 {
-    return EGL_DEFAULT_DISPLAY;
+    return  EGLNativeDisplayType(EGL_DEFAULT_DISPLAY);
 }
 
 EGLNativeWindowType QEgl::nativeWindow(QWidget* widget)
diff --git a/src/gui/egl/qegl_x11.cpp b/src/gui/egl/qegl_x11.cpp
index cb8dcda..969acc4 100644
--- a/src/gui/egl/qegl_x11.cpp
+++ b/src/gui/egl/qegl_x11.cpp
@@ -163,6 +163,11 @@ VisualID QEgl::getCompatibleVisualId(EGLConfig config)
         int matchingCount = 0;
         chosenVisualInfo = XGetVisualInfo(X11->display, VisualIDMask, &visualInfoTemplate, &matchingCount);
         if (chosenVisualInfo) {
+            // Skip size checks if implementation supports non-matching visual
+            // and config (http://bugreports.qt.nokia.com/browse/QTBUG-9444).
+            if (QEgl::hasExtension("EGL_NV_post_convert_replication"))
+                return visualId;
+
             int visualRedSize = countBits(chosenVisualInfo->red_mask);
             int visualGreenSize = countBits(chosenVisualInfo->green_mask);
             int visualBlueSize = countBits(chosenVisualInfo->blue_mask);
diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp
index b2bdc5c..b491ab9 100644
--- a/src/gui/graphicsview/qgraphicsitem.cpp
+++ b/src/gui/graphicsview/qgraphicsitem.cpp
@@ -1813,7 +1813,7 @@ void QGraphicsItem::setFlags(GraphicsItemFlags flags)
     const quint32 geomChangeFlagsMask = (ItemClipsChildrenToShape | ItemClipsToShape | ItemIgnoresTransformations | ItemIsSelectable);
     bool fullUpdate = (quint32(flags) & geomChangeFlagsMask) != (d_ptr->flags & geomChangeFlagsMask);
     if (fullUpdate)
-        d_ptr->paintedViewBoundingRectsNeedRepaint = 1;
+        d_ptr->updatePaintedViewBoundingRects(/*children=*/true);
 
     // Keep the old flags to compare the diff.
     GraphicsItemFlags oldFlags = GraphicsItemFlags(d_ptr->flags);
@@ -5433,6 +5433,24 @@ void QGraphicsItemPrivate::removeExtraItemCache()
     unsetExtra(ExtraCacheData);
 }
 
+void QGraphicsItemPrivate::updatePaintedViewBoundingRects(bool updateChildren)
+{
+    if (!scene)
+        return;
+
+    for (int i = 0; i < scene->d_func()->views.size(); ++i) {
+        QGraphicsViewPrivate *viewPrivate = scene->d_func()->views.at(i)->d_func();
+        QRect rect = paintedViewBoundingRects.value(viewPrivate->viewport);
+        rect.translate(viewPrivate->dirtyScrollOffset);
+        viewPrivate->updateRect(rect);
+    }
+
+    if (updateChildren) {
+        for (int i = 0; i < children.size(); ++i)
+            children.at(i)->d_ptr->updatePaintedViewBoundingRects(true);
+    }
+}
+
 // Traverses all the ancestors up to the top-level and updates the pointer to
 // always point to the top-most item that has a dirty scene transform.
 // It then backtracks to the top-most dirty item and start calculating the
@@ -5636,8 +5654,9 @@ void QGraphicsItem::scroll(qreal dx, qreal dy, const QRectF &rect)
                 // Adjust with 2 pixel margin. Notice the loss of precision
                 // when converting to QRect.
                 int adjust = 2;
+                QRectF scrollRect = !rect.isNull() ? rect : boundingRect();
                 QRectF br = boundingRect().adjusted(-adjust, -adjust, adjust, adjust);
-                QRect irect = rect.toRect().translated(-br.x(), -br.y());
+                QRect irect = scrollRect.toRect().translated(-br.x(), -br.y());
 
                 pix.scroll(dx, dy, irect);
 
@@ -5645,11 +5664,11 @@ void QGraphicsItem::scroll(qreal dx, qreal dy, const QRectF &rect)
 
                 // Translate the existing expose.
                 foreach (QRectF exposedRect, c->exposed)
-                    c->exposed += exposedRect.translated(dx, dy) & rect;
+                    c->exposed += exposedRect.translated(dx, dy) & scrollRect;
 
                 // Calculate exposure.
                 QRegion exposed;
-                QRect r = rect.toRect();
+                QRect r = scrollRect.toRect();
                 exposed += r;
                 exposed -= r.translated(dx, dy);
                 foreach (QRect rect, exposed.rects())
@@ -7132,7 +7151,11 @@ void QGraphicsItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
                     // calculate their diff by mapping viewport coordinates
                     // directly to parent coordinates.
                     // COMBINE
-                    QTransform viewToParentTransform = (item->d_func()->transformData->computedFullTransform().translate(item->d_ptr->pos.x(), item->d_ptr->pos.y()))
+                    QTransform itemTransform;
+                    if (item->d_ptr->transformData)
+                        itemTransform = item->d_ptr->transformData->computedFullTransform();
+                    itemTransform.translate(item->d_ptr->pos.x(), item->d_ptr->pos.y());
+                    QTransform viewToParentTransform = itemTransform
                                                        * (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/graphicsview/qgraphicsitem_p.h b/src/gui/graphicsview/qgraphicsitem_p.h
index 569a329..e812f29 100644
--- a/src/gui/graphicsview/qgraphicsitem_p.h
+++ b/src/gui/graphicsview/qgraphicsitem_p.h
@@ -377,6 +377,7 @@ public:
     QGraphicsItemCache *extraItemCache() const;
     void removeExtraItemCache();
 
+    void updatePaintedViewBoundingRects(bool updateChildren);
     void ensureSceneTransformRecursive(QGraphicsItem **topMostDirtyItem);
     inline void ensureSceneTransform()
     {
diff --git a/src/gui/graphicsview/qgraphicsscene.cpp b/src/gui/graphicsview/qgraphicsscene.cpp
index 0d4e48a..dfba7c9 100644
--- a/src/gui/graphicsview/qgraphicsscene.cpp
+++ b/src/gui/graphicsview/qgraphicsscene.cpp
@@ -290,13 +290,19 @@ QGraphicsScenePrivate::QGraphicsScenePrivate()
       updateAll(false),
       calledEmitUpdated(false),
       processDirtyItemsEmitted(false),
-      selectionChanging(0),
       needSortTopLevelItems(true),
       holesInTopLevelSiblingIndex(false),
       topLevelSequentialOrdering(true),
       scenePosDescendantsUpdatePending(false),
       stickyFocus(false),
       hasFocus(false),
+      lastMouseGrabberItemHasImplicitMouseGrab(false),
+      allItemsIgnoreHoverEvents(true),
+      allItemsUseDefaultCursor(true),
+      painterStateProtection(true),
+      sortCacheEnabled(false),
+      allItemsIgnoreTouchEvents(true),
+      selectionChanging(0),
       rectAdjust(2),
       focusItem(0),
       lastFocusItem(0),
@@ -306,16 +312,10 @@ QGraphicsScenePrivate::QGraphicsScenePrivate()
       activationRefCount(0),
       childExplicitActivation(0),
       lastMouseGrabberItem(0),
-      lastMouseGrabberItemHasImplicitMouseGrab(false),
       dragDropItem(0),
       enterWidget(0),
       lastDropAction(Qt::IgnoreAction),
-      allItemsIgnoreHoverEvents(true),
-      allItemsUseDefaultCursor(true),
-      painterStateProtection(true),
-      sortCacheEnabled(false),
-      style(0),
-      allItemsIgnoreTouchEvents(true)
+      style(0)
 {
 }
 
@@ -5116,9 +5116,15 @@ void QGraphicsScenePrivate::processDirtyItemsRecursive(QGraphicsItem *item, bool
 
     // Process children.
     if (itemHasChildren && item->d_ptr->dirtyChildren) {
+        const bool itemClipsChildrenToShape = item->d_ptr->flags & QGraphicsItem::ItemClipsChildrenToShape;
+        if (itemClipsChildrenToShape) {
+            // Make sure child updates are clipped to the item's bounding rect.
+            for (int i = 0; i < views.size(); ++i)
+                views.at(i)->d_func()->setUpdateClip(item);
+        }
         if (!dirtyAncestorContainsChildren) {
             dirtyAncestorContainsChildren = item->d_ptr->fullUpdatePending
-                                            && (item->d_ptr->flags & QGraphicsItem::ItemClipsChildrenToShape);
+                                            && itemClipsChildrenToShape;
         }
         const bool allChildrenDirty = item->d_ptr->allChildrenDirty;
         const bool parentIgnoresVisible = item->d_ptr->ignoreVisible;
@@ -5141,6 +5147,12 @@ void QGraphicsScenePrivate::processDirtyItemsRecursive(QGraphicsItem *item, bool
             }
             processDirtyItemsRecursive(child, dirtyAncestorContainsChildren, opacity);
         }
+
+        if (itemClipsChildrenToShape) {
+            // Reset updateClip.
+            for (int i = 0; i < views.size(); ++i)
+                views.at(i)->d_func()->setUpdateClip(0);
+        }
     } else if (wasDirtyParentSceneTransform) {
         item->d_ptr->invalidateChildrenSceneTransform();
     }
diff --git a/src/gui/graphicsview/qgraphicsscene_p.h b/src/gui/graphicsview/qgraphicsscene_p.h
index 0a85f0e..77bf450 100644
--- a/src/gui/graphicsview/qgraphicsscene_p.h
+++ b/src/gui/graphicsview/qgraphicsscene_p.h
@@ -97,24 +97,36 @@ public:
     int lastItemCount;
 
     QRectF sceneRect;
-    bool hasSceneRect;
-    bool dirtyGrowingItemsBoundingRect;
+
+    quint32 hasSceneRect : 1;
+    quint32 dirtyGrowingItemsBoundingRect : 1;
+    quint32 updateAll : 1;
+    quint32 calledEmitUpdated : 1;
+    quint32 processDirtyItemsEmitted : 1;
+    quint32 needSortTopLevelItems : 1;
+    quint32 holesInTopLevelSiblingIndex : 1;
+    quint32 topLevelSequentialOrdering : 1;
+    quint32 scenePosDescendantsUpdatePending : 1;
+    quint32 stickyFocus : 1;
+    quint32 hasFocus : 1;
+    quint32 lastMouseGrabberItemHasImplicitMouseGrab : 1;
+    quint32 allItemsIgnoreHoverEvents : 1;
+    quint32 allItemsUseDefaultCursor : 1;
+    quint32 painterStateProtection : 1;
+    quint32 sortCacheEnabled : 1; // for compatibility
+    quint32 allItemsIgnoreTouchEvents : 1;
+    quint32 padding : 15;
+
     QRectF growingItemsBoundingRect;
 
     void _q_emitUpdated();
     QList<QRectF> updatedRects;
-    bool updateAll;
-    bool calledEmitUpdated;
-    bool processDirtyItemsEmitted;
 
     QPainterPath selectionArea;
     int selectionChanging;
     QSet<QGraphicsItem *> selectedItems;
     QVector<QGraphicsItem *> unpolishedItems;
     QList<QGraphicsItem *> topLevelItems;
-    bool needSortTopLevelItems;
-    bool holesInTopLevelSiblingIndex;
-    bool topLevelSequentialOrdering;
 
     QMap<QGraphicsItem *, QPointF> movingItemsInitialPositions;
     void registerTopLevelItem(QGraphicsItem *item);
@@ -125,7 +137,6 @@ public:
     void _q_processDirtyItems();
 
     QSet<QGraphicsItem *> scenePosItems;
-    bool scenePosDescendantsUpdatePending;
     void setScenePosItemEnabled(QGraphicsItem *item, bool enabled);
     void registerScenePosItem(QGraphicsItem *item);
     void unregisterScenePosItem(QGraphicsItem *item);
@@ -136,9 +147,6 @@ public:
     QBrush backgroundBrush;
     QBrush foregroundBrush;
 
-    quint32 stickyFocus : 1;
-    quint32 hasFocus : 1;
-    quint32 padding : 30;
     quint32 rectAdjust;
     QGraphicsItem *focusItem;
     QGraphicsItem *lastFocusItem;
@@ -155,7 +163,6 @@ public:
     void removePopup(QGraphicsWidget *widget, bool itemIsDying = false);
 
     QGraphicsItem *lastMouseGrabberItem;
-    bool lastMouseGrabberItemHasImplicitMouseGrab;
     QList<QGraphicsItem *> mouseGrabberItems;
     void grabMouse(QGraphicsItem *item, bool implicit = false);
     void ungrabMouse(QGraphicsItem *item, bool itemIsDying = false);
@@ -172,8 +179,6 @@ public:
     QList<QGraphicsItem *> cachedItemsUnderMouse;
     QList<QGraphicsItem *> hoverItems;
     QPointF lastSceneMousePos;
-    bool allItemsIgnoreHoverEvents;
-    bool allItemsUseDefaultCursor;
     void enableMouseTrackingOnViews();
     QMap<Qt::MouseButton, QPointF> mouseGrabberButtonDownPos;
     QMap<Qt::MouseButton, QPointF> mouseGrabberButtonDownScenePos;
@@ -187,8 +192,6 @@ public:
     void addView(QGraphicsView *view);
     void removeView(QGraphicsView *view);
 
-    bool painterStateProtection;
-
     QMultiMap<QGraphicsItem *, QGraphicsItem *> sceneEventFilters;
     void installSceneEventFilter(QGraphicsItem *watched, QGraphicsItem *filter);
     void removeSceneEventFilter(QGraphicsItem *watched, QGraphicsItem *filter);
@@ -210,8 +213,6 @@ public:
     void mousePressEventHandler(QGraphicsSceneMouseEvent *mouseEvent);
     QGraphicsWidget *windowForItem(const QGraphicsItem *item) const;
 
-    bool sortCacheEnabled; // for compatibility
-
     void drawItemHelper(QGraphicsItem *item, QPainter *painter,
                         const QStyleOptionGraphicsItem *option, QWidget *widget,
                         bool painterStateProtection);
@@ -295,7 +296,6 @@ public:
     int findClosestTouchPointId(const QPointF &scenePos);
     void touchEventHandler(QTouchEvent *touchEvent);
     bool sendTouchBeginEvent(QGraphicsItem *item, QTouchEvent *touchEvent);
-    bool allItemsIgnoreTouchEvents;
     void enableTouchEventsOnViews();
 
     QList<QGraphicsObject *> cachedTargetItems;
diff --git a/src/gui/graphicsview/qgraphicsview.cpp b/src/gui/graphicsview/qgraphicsview.cpp
index 0bba7e9..0f951ef 100644
--- a/src/gui/graphicsview/qgraphicsview.cpp
+++ b/src/gui/graphicsview/qgraphicsview.cpp
@@ -327,16 +327,21 @@ QGraphicsViewPrivate::QGraphicsViewPrivate()
       dragMode(QGraphicsView::NoDrag),
       sceneInteractionAllowed(true), hasSceneRect(false),
       connectedToScene(false),
-      mousePressButton(Qt::NoButton),
+      useLastMouseEvent(false),
       identityMatrix(true),
       dirtyScroll(true),
       accelerateScrolling(true),
+      keepLastCenterPoint(true),
+      transforming(false),
+      handScrolling(false),
+      mustAllocateStyleOptions(false),
+      mustResizeBackgroundPixmap(true),
+      fullUpdatePending(true),
+      hasUpdateClip(false),
+      mousePressButton(Qt::NoButton),
       leftIndent(0), topIndent(0),
       lastMouseEvent(QEvent::None, QPoint(), Qt::NoButton, 0, 0),
-      useLastMouseEvent(false),
-      keepLastCenterPoint(true),
       alignment(Qt::AlignCenter),
-      transforming(false),
       transformationAnchor(QGraphicsView::AnchorViewCenter), resizeAnchor(QGraphicsView::NoAnchor),
       viewportUpdateMode(QGraphicsView::MinimalViewportUpdate),
       optimizationFlags(0),
@@ -345,14 +350,11 @@ QGraphicsViewPrivate::QGraphicsViewPrivate()
       rubberBanding(false),
       rubberBandSelectionMode(Qt::IntersectsItemShape),
 #endif
-      handScrolling(false), handScrollMotions(0), cacheMode(0),
-      mustAllocateStyleOptions(false),
-      mustResizeBackgroundPixmap(true),
+      handScrollMotions(0), cacheMode(0),
 #ifndef QT_NO_CURSOR
       hasStoredOriginalCursor(false),
 #endif
       lastDragDropEvent(0),
-      fullUpdatePending(true),
       updateSceneSlotReimplementedChecked(false)
 {
     styleOptions.reserve(QGRAPHICSVIEW_PREALLOC_STYLE_OPTIONS);
@@ -879,6 +881,52 @@ static inline void QRect_unite(QRect *rect, const QRect &other)
     }
 }
 
+/*
+   Calling this function results in update rects being clipped to the item's
+   bounding rect. Note that updates prior to this function call is not clipped.
+   The clip is removed by passing 0.
+*/
+void QGraphicsViewPrivate::setUpdateClip(QGraphicsItem *item)
+{
+    Q_Q(QGraphicsView);
+    // We simply ignore the request if the update mode is either FullViewportUpdate
+    // or NoViewportUpdate; in that case there's no point in clipping anything.
+    if (!item || viewportUpdateMode == QGraphicsView::NoViewportUpdate
+        || viewportUpdateMode == QGraphicsView::FullViewportUpdate) {
+        hasUpdateClip = false;
+        return;
+    }
+
+    // Calculate the clip (item's bounding rect in view coordinates).
+    // Optimized version of:
+    // QRect clip = item->deviceTransform(q->viewportTransform())
+    //              .mapRect(item->boundingRect()).toAlignedRect();
+    QRect clip;
+    if (item->d_ptr->itemIsUntransformable()) {
+        QTransform xform = item->deviceTransform(q->viewportTransform());
+        clip = xform.mapRect(item->boundingRect()).toAlignedRect();
+    } else if (item->d_ptr->sceneTransformTranslateOnly && identityMatrix) {
+        QRectF r(item->boundingRect());
+        r.translate(item->d_ptr->sceneTransform.dx() - horizontalScroll(),
+                    item->d_ptr->sceneTransform.dy() - verticalScroll());
+        clip = r.toAlignedRect();
+    } else if (!q->isTransformed()) {
+        clip = item->d_ptr->sceneTransform.mapRect(item->boundingRect()).toAlignedRect();
+    } else {
+        QTransform xform = item->d_ptr->sceneTransform;
+        xform *= q->viewportTransform();
+        clip = xform.mapRect(item->boundingRect()).toAlignedRect();
+    }
+
+    if (hasUpdateClip) {
+        // Intersect with old clip.
+        updateClip &= clip;
+    } else {
+        updateClip = clip;
+        hasUpdateClip = true;
+    }
+}
+
 bool QGraphicsViewPrivate::updateRegion(const QRectF &rect, const QTransform &xform)
 {
     if (rect.isEmpty())
@@ -909,6 +957,8 @@ bool QGraphicsViewPrivate::updateRegion(const QRectF &rect, const QTransform &xf
             viewRect.adjust(-1, -1, 1, 1);
         else
             viewRect.adjust(-2, -2, 2, 2);
+        if (hasUpdateClip)
+            viewRect &= updateClip;
         dirtyRegion += viewRect;
     }
 
@@ -930,7 +980,10 @@ bool QGraphicsViewPrivate::updateRect(const QRect &r)
         viewport->update();
         break;
     case QGraphicsView::BoundingRectViewportUpdate:
-        QRect_unite(&dirtyBoundingRect, r);
+        if (hasUpdateClip)
+            QRect_unite(&dirtyBoundingRect, r & updateClip);
+        else
+            QRect_unite(&dirtyBoundingRect, r);
         if (containsViewport(dirtyBoundingRect, viewport->width(), viewport->height())) {
             fullUpdatePending = true;
             viewport->update();
@@ -938,7 +991,10 @@ bool QGraphicsViewPrivate::updateRect(const QRect &r)
         break;
     case QGraphicsView::SmartViewportUpdate: // ### DEPRECATE
     case QGraphicsView::MinimalViewportUpdate:
-        dirtyRegion += r;
+        if (hasUpdateClip)
+            dirtyRegion += r & updateClip;
+        else
+            dirtyRegion += r;
         break;
     default:
         break;
diff --git a/src/gui/graphicsview/qgraphicsview_p.h b/src/gui/graphicsview/qgraphicsview_p.h
index aeff28a..7bd9ecb 100644
--- a/src/gui/graphicsview/qgraphicsview_p.h
+++ b/src/gui/graphicsview/qgraphicsview_p.h
@@ -77,11 +77,25 @@ public:
     QPainter::RenderHints renderHints;
 
     QGraphicsView::DragMode dragMode;
-    bool sceneInteractionAllowed;
+
+    quint32 sceneInteractionAllowed : 1;
+    quint32 hasSceneRect : 1;
+    quint32 connectedToScene : 1;
+    quint32 useLastMouseEvent : 1;
+    quint32 identityMatrix : 1;
+    quint32 dirtyScroll : 1;
+    quint32 accelerateScrolling : 1;
+    quint32 keepLastCenterPoint : 1;
+    quint32 transforming : 1;
+    quint32 handScrolling : 1;
+    quint32 mustAllocateStyleOptions : 1;
+    quint32 mustResizeBackgroundPixmap : 1;
+    quint32 fullUpdatePending : 1;
+    quint32 hasUpdateClip : 1;
+    quint32 padding : 18;
+
     QRectF sceneRect;
-    bool hasSceneRect;
     void updateLastCenterPoint();
-    bool connectedToScene;
 
     qint64 horizontalScroll() const;
     qint64 verticalScroll() const;
@@ -89,6 +103,7 @@ public:
     QRectF mapRectToScene(const QRect &rect) const;
     QRectF mapRectFromScene(const QRectF &rect) const;
 
+    QRect updateClip;
     QPointF mousePressItemPoint;
     QPointF mousePressScenePoint;
     QPoint mousePressViewPoint;
@@ -98,26 +113,20 @@ public:
     QPoint dirtyScrollOffset;
     Qt::MouseButton mousePressButton;
     QTransform matrix;
-    bool identityMatrix;
     qint64 scrollX, scrollY;
-    bool dirtyScroll;
     void updateScroll();
 
-    bool accelerateScrolling;
     qreal leftIndent;
     qreal topIndent;
 
     // Replaying mouse events
     QMouseEvent lastMouseEvent;
-    bool useLastMouseEvent;
     void replayLastMouseEvent();
     void storeMouseEvent(QMouseEvent *event);
     void mouseMoveEventHandler(QMouseEvent *event);
 
     QPointF lastCenterPoint;
-    bool keepLastCenterPoint;
     Qt::Alignment alignment;
-    bool transforming;
 
     QGraphicsView::ViewportAnchor transformationAnchor;
     QGraphicsView::ViewportAnchor resizeAnchor;
@@ -131,20 +140,17 @@ public:
     bool rubberBanding;
     Qt::ItemSelectionMode rubberBandSelectionMode;
 #endif
-    bool handScrolling;
     int handScrollMotions;
 
     QGraphicsView::CacheMode cacheMode;
 
     QVector<QStyleOptionGraphicsItem> styleOptions;
-    bool mustAllocateStyleOptions;
     QStyleOptionGraphicsItem *allocStyleOptionsArray(int numItems);
     void freeStyleOptionsArray(QStyleOptionGraphicsItem *array);
 
     QBrush backgroundBrush;
     QBrush foregroundBrush;
     QPixmap backgroundPixmap;
-    bool mustResizeBackgroundPixmap;
     QRegion backgroundPixmapExposed;
 
 #ifndef QT_NO_CURSOR
@@ -161,7 +167,6 @@ public:
 
     QRect mapToViewRect(const QGraphicsItem *item, const QRectF &rect) const;
     QRegion mapToViewRegion(const QGraphicsItem *item, const QRectF &rect) const;
-    bool fullUpdatePending;
     QRegion dirtyRegion;
     QRect dirtyBoundingRect;
     void processPendingUpdates();
@@ -192,6 +197,8 @@ public:
 #endif
     }
 
+    void setUpdateClip(QGraphicsItem *);
+
     inline bool updateRectF(const QRectF &rect)
     {
         if (rect.isEmpty())
diff --git a/src/gui/itemviews/qsortfilterproxymodel.cpp b/src/gui/itemviews/qsortfilterproxymodel.cpp
index dce5c6a..b12cd45 100644
--- a/src/gui/itemviews/qsortfilterproxymodel.cpp
+++ b/src/gui/itemviews/qsortfilterproxymodel.cpp
@@ -1099,7 +1099,7 @@ void QSortFilterProxyModelPrivate::_q_sourceDataChanged(const QModelIndex &sourc
     if (!source_top_left.isValid() || !source_bottom_right.isValid())
         return;
     QModelIndex source_parent = source_top_left.parent();
-    IndexMap::const_iterator it = create_mapping(source_parent);
+    IndexMap::const_iterator it = source_index_mapping.find(source_parent);
     if (it == source_index_mapping.constEnd()) {
         // Don't care, since we don't have mapping for this index
         return;
diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index 60f38f2..0c22368 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -2535,7 +2535,7 @@ void QWidgetPrivate::setStyle_helper(QStyle *newStyle, bool propagate, bool
     Q_Q(QWidget);
     QStyle *oldStyle  = q->style();
 #ifndef QT_NO_STYLE_STYLESHEET
-    QStyle *origStyle = 0;
+    QWeakPointer<QStyle> origStyle;
 #endif
 
 #ifdef Q_WS_MAC
@@ -2549,7 +2549,7 @@ void QWidgetPrivate::setStyle_helper(QStyle *newStyle, bool propagate, bool
         createExtra();
 
 #ifndef QT_NO_STYLE_STYLESHEET
-        origStyle = extra->style;
+        origStyle = extra->style.data();
 #endif
         extra->style = newStyle;
     }
@@ -2578,23 +2578,23 @@ void QWidgetPrivate::setStyle_helper(QStyle *newStyle, bool propagate, bool
         }
     }
 
-    QEvent e(QEvent::StyleChange);
-    QApplication::sendEvent(q, &e);
-#ifdef QT3_SUPPORT
-    q->styleChange(*oldStyle);
-#endif
-
 #ifndef QT_NO_STYLE_STYLESHEET
     if (!qobject_cast<QStyleSheetStyle*>(newStyle)) {
-        if (const QStyleSheetStyle* cssStyle = qobject_cast<QStyleSheetStyle*>(origStyle)) {
+        if (const QStyleSheetStyle* cssStyle = qobject_cast<QStyleSheetStyle*>(origStyle.data())) {
             cssStyle->clearWidgetFont(q);
         }
     }
 #endif
 
+    QEvent e(QEvent::StyleChange);
+    QApplication::sendEvent(q, &e);
+#ifdef QT3_SUPPORT
+    q->styleChange(*oldStyle);
+#endif
+
 #ifndef QT_NO_STYLE_STYLESHEET
     // dereference the old stylesheet style
-    if (QStyleSheetStyle *proxy = qobject_cast<QStyleSheetStyle *>(origStyle))
+    if (QStyleSheetStyle *proxy = qobject_cast<QStyleSheetStyle *>(origStyle.data()))
         proxy->deref();
 #endif
 }
@@ -5583,52 +5583,23 @@ QPixmap QWidgetEffectSourcePrivate::pixmap(Qt::CoordinateSystem system, QPoint *
         pixmapOffset = painterTransform.map(pixmapOffset);
     }
 
-
     QRect effectRect;
 
-    if (mode == QGraphicsEffect::PadToEffectiveBoundingRect) {
+    if (mode == QGraphicsEffect::PadToEffectiveBoundingRect)
         effectRect = m_widget->graphicsEffect()->boundingRectFor(sourceRect).toAlignedRect();
-
-    } else if (mode == QGraphicsEffect::PadToTransparentBorder) {
+    else if (mode == QGraphicsEffect::PadToTransparentBorder)
         effectRect = sourceRect.adjusted(-1, -1, 1, 1).toAlignedRect();
-
-    } else {
+    else
         effectRect = sourceRect.toAlignedRect();
 
-    }
-
     if (offset)
         *offset = effectRect.topLeft();
 
-    if (deviceCoordinates) {
-        // Clip to device rect.
-        int left, top, right, bottom;
-        effectRect.getCoords(&left, &top, &right, &bottom);
-        if (left < 0) {
-            if (offset)
-                offset->rx() += -left;
-            effectRect.setX(0);
-        }
-        if (top < 0) {
-            if (offset)
-                offset->ry() += -top;
-            effectRect.setY(0);
-        }
-        // NB! We use +-1 for historical reasons (see QRect documentation).
-        QPaintDevice *device = context->painter->device();
-        const int deviceWidth = device->width();
-        const int deviceHeight = device->height();
-        if (right + 1 > deviceWidth)
-            effectRect.setRight(deviceWidth - 1);
-        if (bottom + 1 > deviceHeight)
-            effectRect.setBottom(deviceHeight -1);
-    }
-
     pixmapOffset -= effectRect.topLeft();
 
     QPixmap pixmap(effectRect.size());
     pixmap.fill(Qt::transparent);
-    m_widget->render(&pixmap, pixmapOffset);
+    m_widget->render(&pixmap, pixmapOffset, QRegion(), QWidget::DrawChildren);
     return pixmap;
 }
 #endif //QT_NO_GRAPHICSEFFECT
diff --git a/src/gui/kernel/qwidget_win.cpp b/src/gui/kernel/qwidget_win.cpp
index 7d647b7..c2a24fe 100644
--- a/src/gui/kernel/qwidget_win.cpp
+++ b/src/gui/kernel/qwidget_win.cpp
@@ -123,9 +123,11 @@ static PtrWTClose ptrWTClose = 0;
 static PtrWTInfo ptrWTInfo = 0;
 static PtrWTQueueSizeGet ptrWTQueueSizeGet = 0;
 static PtrWTQueueSizeSet ptrWTQueueSizeSet = 0;
+#ifndef QT_NO_TABLETEVENT
 static void init_wintab_functions();
 static void qt_tablet_init();
 static void qt_tablet_cleanup();
+#endif // QT_NO_TABLETEVENT
 extern HCTX qt_tablet_context;
 extern bool qt_tablet_tilt_support;
 
@@ -136,6 +138,8 @@ QWidget* qt_get_tablet_widget()
 }
 
 extern bool qt_is_gui_used;
+
+#ifndef QT_NO_TABLETEVENT
 static void init_wintab_functions()
 {
 #if defined(Q_OS_WINCE)
@@ -227,6 +231,7 @@ static void qt_tablet_cleanup()
     delete qt_tablet_widget;
     qt_tablet_widget = 0;
 }
+#endif // QT_NO_TABLETEVENT
 
 const QString qt_reg_winclass(QWidget *w);                // defined in qapplication_win.cpp
 
diff --git a/src/gui/kernel/qwidget_wince.cpp b/src/gui/kernel/qwidget_wince.cpp
index 509847b..9c2c8c7 100644
--- a/src/gui/kernel/qwidget_wince.cpp
+++ b/src/gui/kernel/qwidget_wince.cpp
@@ -63,6 +63,7 @@ typedef BOOL        (API *PtrWTGet)(HCTX, LPLOGCONTEXT);
 typedef int     (API *PtrWTQueueSizeGet)(HCTX);
 typedef BOOL    (API *PtrWTQueueSizeSet)(HCTX, int);
 
+#ifndef QT_NO_TABLETEVENT
 static void qt_tablet_init_wce();
 static void qt_tablet_cleanup_wce();
 
@@ -135,6 +136,7 @@ static void qt_tablet_cleanup_wce() {
     delete qt_tablet_widget;
     qt_tablet_widget = 0;
 }
+#endif // QT_NO_TABLETEVENT
 
 
 // The internal qWinRequestConfig, defined in qapplication_win.cpp, stores move,
diff --git a/src/gui/painting/qbezier.cpp b/src/gui/painting/qbezier.cpp
index 7ff2a37..2a9b31a 100644
--- a/src/gui/painting/qbezier.cpp
+++ b/src/gui/painting/qbezier.cpp
@@ -93,7 +93,7 @@ QBezier QBezier::fromPoints(const QPointF &p1, const QPointF &p2,
 /*!
   \internal
 */
-QPolygonF QBezier::toPolygon() const
+QPolygonF QBezier::toPolygon(qreal bezier_flattening_threshold) const
 {
     // flattening is done by splitting the bezier until we can replace the segment by a straight
     // line. We split further until the control points are close enough to the line connecting the
@@ -108,7 +108,7 @@ QPolygonF QBezier::toPolygon() const
 
     QPolygonF polygon;
     polygon.append(QPointF(x1, y1));
-    addToPolygon(&polygon);
+    addToPolygon(&polygon, bezier_flattening_threshold);
     return polygon;
 }
 
@@ -117,34 +117,6 @@ QBezier QBezier::mapBy(const QTransform &transform) const
     return QBezier::fromPoints(transform.map(pt1()), transform.map(pt2()), transform.map(pt3()), transform.map(pt4()));
 }
 
-//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
-static inline void flattenBezierWithoutInflections(QBezier &bez,
-                                                   QPolygonF *&p)
-{
-    QBezier left;
-
-    while (1) {
-        qreal dx = bez.x2 - bez.x1;
-        qreal dy = bez.y2 - bez.y1;
-
-        qreal normalized = qSqrt(dx * dx + dy * dy);
-        if (qFuzzyIsNull(normalized))
-           break;
-
-        qreal d = qAbs(dx * (bez.y3 - bez.y2) - dy * (bez.x3 - bez.x2));
-
-        qreal t = qSqrt(4. / 3. * normalized * flatness / d);
-        if (t > 1 || qFuzzyIsNull(t - (qreal)1.))
-            break;
-        bez.parameterSplitLeft(t, &left);
-        p->append(bez.pt1());
-    }
-}
-
 QBezier QBezier::getSubRange(qreal t0, qreal t1) const
 {
     QBezier result;
@@ -223,7 +195,7 @@ static inline bool findInflections(qreal a, qreal b, qreal c,
 }
 
 
-void QBezier::addToPolygon(QPolygonF *polygon) const
+void QBezier::addToPolygon(QPolygonF *polygon, qreal bezier_flattening_threshold) const
 {
     QBezier beziers[32];
     beziers[0] = *this;
@@ -243,7 +215,7 @@ void QBezier::addToPolygon(QPolygonF *polygon) const
                 qAbs(b->x1 - b->x3) + qAbs(b->y1 - b->y3);
             l = 1.;
         }
-        if (d < flatness*l || b == beziers + 31) {
+        if (d < bezier_flattening_threshold*l || b == beziers + 31) {
             // good enough, we pop it off and add the endpoint
             polygon->append(QPointF(b->x4, b->y4));
             --b;
@@ -255,55 +227,6 @@ void QBezier::addToPolygon(QPolygonF *polygon) const
     }
 }
 
-void QBezier::addToPolygonMixed(QPolygonF *polygon) const
-{
-    qreal ax = -x1 + 3*x2 - 3*x3 + x4;
-    qreal ay = -y1 + 3*y2 - 3*y3 + y4;
-    qreal bx = 3*x1 - 6*x2 + 3*x3;
-    qreal by = 3*y1 - 6*y2 + 3*y3;
-    qreal cx = -3*x1 + 3*x2;
-    qreal cy = -3*y1 + 2*y2;
-    qreal a = 6 * (ay * bx - ax * by);
-    qreal b = 6 * (ay * cx - ax * cy);
-    qreal c = 2 * (by * cx - bx * cy);
-
-    if ((qFuzzyIsNull(a) && qFuzzyIsNull(b)) ||
-        (b * b - 4 * a *c) < 0) {
-        QBezier bez(*this);
-        flattenBezierWithoutInflections(bez, polygon);
-        polygon->append(QPointF(x4, y4));
-    } else {
-        QBezier beziers[32];
-        beziers[0] = *this;
-        QBezier *b = beziers;
-
-        while (b >= beziers) {
-            // check if we can pop the top bezier curve from the stack
-            qreal y4y1 = b->y4 - b->y1;
-            qreal x4x1 = b->x4 - b->x1;
-            qreal l = qAbs(x4x1) + qAbs(y4y1);
-            qreal d;
-            if (l > 1.) {
-                d = qAbs( (x4x1)*(b->y1 - b->y2) - (y4y1)*(b->x1 - b->x2) )
-                    + qAbs( (x4x1)*(b->y1 - b->y3) - (y4y1)*(b->x1 - b->x3) );
-            } else {
-                d = qAbs(b->x1 - b->x2) + qAbs(b->y1 - b->y2) +
-                    qAbs(b->x1 - b->x3) + qAbs(b->y1 - b->y3);
-                l = 1.;
-            }
-            if (d < .5*l || b == beziers + 31) {
-                // good enough, we pop it off and add the endpoint
-                polygon->append(QPointF(b->x4, b->y4));
-                --b;
-            } else {
-                // split, second half of the polygon goes lower into the stack
-                b->split(b+1, b);
-                ++b;
-            }
-        }
-    }
-}
-
 QRectF QBezier::bounds() const
 {
     qreal xmin = x1;
@@ -824,147 +747,4 @@ QBezier QBezier::bezierOnInterval(qreal t0, qreal t1) const
     return result;
 }
 
-
-static inline void bindInflectionPoint(const QBezier &bez, const qreal t,
-                                       qreal *tMinus , qreal *tPlus)
-{
-    if (t <= 0) {
-        *tMinus = *tPlus = -1;
-        return;
-    } else if (t >= 1) {
-        *tMinus = *tPlus = 2;
-        return;
-    }
-
-    QBezier left, right;
-    splitBezierAt(bez, t, &left, &right);
-
-    qreal ax = -right.x1 + 3*right.x2 - 3*right.x3 + right.x4;
-    qreal ay = -right.y1 + 3*right.y2 - 3*right.y3 + right.y4;
-    qreal ex = 3 * (right.x2 - right.x3);
-    qreal ey = 3 * (right.y2 - right.y3);
-
-    qreal s4 = qAbs(6 * (ey * ax - ex * ay) / qSqrt(ex * ex + ey * ey)) + 0.00001f;
-    qreal tf = qPow(qreal(9 * flatness / s4), qreal(1./3.));
-    *tMinus = t - (1 - t) * tf;
-    *tPlus  = t + (1 - t) * tf;
-}
-
-void QBezier::addToPolygonIterative(QPolygonF *p) const
-{
-    qreal t1, t2, tcusp;
-    qreal t1min, t1plus, t2min, t2plus;
-
-    qreal ax = -x1 + 3*x2 - 3*x3 + x4;
-    qreal ay = -y1 + 3*y2 - 3*y3 + y4;
-    qreal bx = 3*x1 - 6*x2 + 3*x3;
-    qreal by = 3*y1 - 6*y2 + 3*y3;
-    qreal cx = -3*x1 + 3*x2;
-    qreal cy = -3*y1 + 2*y2;
-
-    if (findInflections(6 * (ay * bx - ax * by),
-                        6 * (ay * cx - ax * cy),
-                        2 * (by * cx - bx * cy),
-                        &t1, &t2, &tcusp)) {
-        bindInflectionPoint(*this, t1, &t1min, &t1plus);
-        bindInflectionPoint(*this, t2, &t2min, &t2plus);
-
-        QBezier tmpBez = *this;
-        QBezier left, right, bez1, bez2, bez3;
-	if (t1min > 0) {
-            if (t1min >= 1) {
-                flattenBezierWithoutInflections(tmpBez, p);
-            } else {
-                splitBezierAt(tmpBez, t1min, &left, &right);
-                flattenBezierWithoutInflections(left, p);
-                p->append(tmpBez.pointAt(t1min));
-
-                if (t2min < t1plus) {
-                    if (tcusp < 1) {
-                        p->append(tmpBez.pointAt(tcusp));
-                    }
-                    if (t2plus < 1) {
-                        splitBezierAt(tmpBez, t2plus, &left, &right);
-                        flattenBezierWithoutInflections(right, p);
-                    }
-                } else if (t1plus < 1) {
-                    if (t2min < 1) {
-                        splitBezierAt(tmpBez, t2min, &bez3, &right);
-                        splitBezierAt(bez3, t1plus, &left, &bez2);
-
-                        flattenBezierWithoutInflections(bez2, p);
-                        p->append(tmpBez.pointAt(t2min));
-
-                        if (t2plus < 1) {
-                            splitBezierAt(tmpBez, t2plus, &left, &bez2);
-                            flattenBezierWithoutInflections(bez2, p);
-                        }
-                    } else {
-                        splitBezierAt(tmpBez, t1plus, &left, &bez2);
-                        flattenBezierWithoutInflections(bez2, p);
-                    }
-                }
-            }
-	} else if (t1plus > 0) {
-            p->append(QPointF(x1, y1));
-            if (t2min < t1plus)	{
-                if (tcusp < 1) {
-                    p->append(tmpBez.pointAt(tcusp));
-                }
-                if (t2plus < 1) {
-                    splitBezierAt(tmpBez, t2plus, &left, &bez2);
-                    flattenBezierWithoutInflections(bez2, p);
-                }
-            } else if (t1plus < 1) {
-                if (t2min < 1) {
-                    splitBezierAt(tmpBez, t2min, &bez3, &right);
-                    splitBezierAt(bez3, t1plus, &left, &bez2);
-
-                    flattenBezierWithoutInflections(bez2, p);
-
-                    p->append(tmpBez.pointAt(t2min));
-                    if (t2plus < 1) {
-                        splitBezierAt(tmpBez, t2plus, &left, &bez2);
-                        flattenBezierWithoutInflections(bez2, p);
-                    }
-                } else {
-                    splitBezierAt(tmpBez, t1plus, &left, &bez2);
-                    flattenBezierWithoutInflections(bez2, p);
-                }
-            }
-        } else if (t2min > 0) {
-            if (t2min < 1) {
-                splitBezierAt(tmpBez, t2min, &bez1, &right);
-                flattenBezierWithoutInflections(bez1, p);
-                p->append(tmpBez.pointAt(t2min));
-
-                if (t2plus < 1) {
-                    splitBezierAt(tmpBez, t2plus, &left, &bez2);
-                    flattenBezierWithoutInflections(bez2, p);
-                }
-            } else {
-                //### in here we should check whether the area of the
-                //    triangle formed between pt1/pt2/pt3 is smaller
-                //    or equal to 0 and then do iterative flattening
-                //    if not we should fallback and do the recursive
-                //    flattening.
-                flattenBezierWithoutInflections(tmpBez, p);
-            }
-        } else if (t2plus > 0) {
-            p->append(QPointF(x1, y1));
-            if (t2plus < 1) {
-                splitBezierAt(tmpBez, t2plus, &left, &bez2);
-                flattenBezierWithoutInflections(bez2, p);
-            }
-        } else {
-            flattenBezierWithoutInflections(tmpBez, p);
-        }
-    } else {
-        QBezier bez = *this;
-        flattenBezierWithoutInflections(bez, p);
-    }
-
-    p->append(QPointF(x4, y4));
-}
-
 QT_END_NAMESPACE
diff --git a/src/gui/painting/qbezier_p.h b/src/gui/painting/qbezier_p.h
index 846635f..18ec116 100644
--- a/src/gui/painting/qbezier_p.h
+++ b/src/gui/painting/qbezier_p.h
@@ -79,10 +79,9 @@ public:
     inline QPointF derivedAt(qreal t) const;
     inline QPointF secondDerivedAt(qreal t) const;
 
-    QPolygonF toPolygon() const;
-    void addToPolygon(QPolygonF *p) const;
-    void addToPolygonIterative(QPolygonF *p) const;
-    void addToPolygonMixed(QPolygonF *p) const;
+    QPolygonF toPolygon(qreal bezier_flattening_threshold = 0.5) const;
+    void addToPolygon(QPolygonF *p, qreal bezier_flattening_threshold = 0.5) const;
+
     QRectF bounds() const;
     qreal length(qreal error = 0.01) const;
     void addIfClose(qreal *length, qreal error) const;
diff --git a/src/gui/painting/qpaintengineex.cpp b/src/gui/painting/qpaintengineex.cpp
index fda937e..ff82d59 100644
--- a/src/gui/painting/qpaintengineex.cpp
+++ b/src/gui/painting/qpaintengineex.cpp
@@ -461,6 +461,7 @@ void QPaintEngineEx::stroke(const QVectorPath &path, const QPen &pen)
         // change the current transform. Normal transformed,
         // non-cosmetic pens will be transformed as part of fill
         // later, so they are also covered here..
+        d->activeStroker->setCurveThresholdFromTransform(state()->matrix);
         d->activeStroker->begin(d->strokeHandler);
         if (types) {
             while (points < lastPoint) {
@@ -518,6 +519,7 @@ void QPaintEngineEx::stroke(const QVectorPath &path, const QPen &pen)
             QPainterPath painterPath = state()->matrix.map(path.convertToPainterPath());
             d->activeStroker->strokePath(painterPath, d->strokeHandler, QTransform());
         } else {
+            d->activeStroker->setCurveThresholdFromTransform(state()->matrix);
             d->activeStroker->begin(d->strokeHandler);
             if (types) {
                 while (points < lastPoint) {
diff --git a/src/gui/painting/qstroker.cpp b/src/gui/painting/qstroker.cpp
index 9b8e099..eabbd8a 100644
--- a/src/gui/painting/qstroker.cpp
+++ b/src/gui/painting/qstroker.cpp
@@ -120,8 +120,8 @@ private:
 class QSubpathFlatIterator
 {
 public:
-    QSubpathFlatIterator(const QDataBuffer<QStrokerOps::Element> *path)
-        : m_path(path), m_pos(0), m_curve_index(-1) { }
+    QSubpathFlatIterator(const QDataBuffer<QStrokerOps::Element> *path, qreal threshold)
+        : m_path(path), m_pos(0), m_curve_index(-1), m_curve_threshold(threshold) { }
 
     inline bool hasNext() const { return m_curve_index >= 0 || m_pos < m_path->size(); }
 
@@ -152,7 +152,7 @@ public:
                                           QPointF(qt_fixed_to_real(m_path->at(m_pos+1).x),
                                                   qt_fixed_to_real(m_path->at(m_pos+1).y)),
                                           QPointF(qt_fixed_to_real(m_path->at(m_pos+2).x),
-                                                  qt_fixed_to_real(m_path->at(m_pos+2).y))).toPolygon();
+                                                  qt_fixed_to_real(m_path->at(m_pos+2).y))).toPolygon(m_curve_threshold);
             m_curve_index = 1;
             e.type = QPainterPath::LineToElement;
             e.x = m_curve.at(0).x();
@@ -169,6 +169,7 @@ private:
     int m_pos;
     QPolygonF m_curve;
     int m_curve_index;
+    qreal m_curve_threshold;
 };
 
 template <class Iterator> bool qt_stroke_side(Iterator *it, QStroker *stroker,
@@ -187,7 +188,12 @@ static inline qreal adapted_angle_on_x(const QLineF &line)
 }
 
 QStrokerOps::QStrokerOps()
-    : m_elements(0), m_customData(0), m_moveTo(0), m_lineTo(0), m_cubicTo(0)
+    : m_elements(0)
+    , m_curveThreshold(qt_real_to_fixed(0.25))
+    , m_customData(0)
+    , m_moveTo(0)
+    , m_lineTo(0)
+    , m_cubicTo(0)
 {
 }
 
@@ -195,7 +201,6 @@ QStrokerOps::~QStrokerOps()
 {
 }
 
-
 /*!
     Prepares the stroker. Call this function once before starting a
     stroke by calling moveTo, lineTo or cubicTo.
@@ -238,6 +243,7 @@ void QStrokerOps::strokePath(const QPainterPath &path, void *customData, const Q
     if (path.isEmpty())
         return;
 
+    setCurveThresholdFromTransform(matrix);
     begin(customData);
     int count = path.elementCount();
     if (matrix.isIdentity()) {
@@ -308,6 +314,8 @@ void QStrokerOps::strokePolygon(const QPointF *points, int pointCount, bool impl
 {
     if (!pointCount)
         return;
+
+    setCurveThresholdFromTransform(matrix);
     begin(data);
     if (matrix.isIdentity()) {
         moveTo(qt_real_to_fixed(points[0].x()), qt_real_to_fixed(points[0].y()));
@@ -348,6 +356,7 @@ void QStrokerOps::strokeEllipse(const QRectF &rect, void *data, const QTransform
         }
     }
 
+    setCurveThresholdFromTransform(matrix);
     begin(data);
     moveTo(qt_real_to_fixed(start.x()), qt_real_to_fixed(start.y()));
     for (int i=0; i<12; i+=3) {
@@ -366,12 +375,10 @@ QStroker::QStroker()
 {
     m_strokeWidth = qt_real_to_fixed(1);
     m_miterLimit = qt_real_to_fixed(2);
-    m_curveThreshold = qt_real_to_fixed(0.25);
 }
 
 QStroker::~QStroker()
 {
-
 }
 
 Qt::PenCapStyle QStroker::capForJoinMode(LineJoinMode mode)
@@ -1135,7 +1142,7 @@ void QDashStroker::processCurrentSubpath()
 
     QPainterPath dashPath;
 
-    QSubpathFlatIterator it(&m_elements);
+    QSubpathFlatIterator it(&m_elements, m_curveThreshold);
     qfixed2d prev = it.next();
 
     bool clipping = !m_clip_rect.isEmpty();
diff --git a/src/gui/painting/qstroker_p.h b/src/gui/painting/qstroker_p.h
index 3e622a8..d646135 100644
--- a/src/gui/painting/qstroker_p.h
+++ b/src/gui/painting/qstroker_p.h
@@ -124,6 +124,9 @@ typedef void (*qStrokerCubicToHook)(qfixed c1x, qfixed c1y,
                                     qfixed ex, qfixed ey,
                                     void *data);
 
+// qtransform.cpp
+Q_GUI_EXPORT bool qt_scaleForTransform(const QTransform &transform, qreal *scale);
+
 class Q_GUI_EXPORT QStrokerOps
 {
 public:
@@ -161,6 +164,16 @@ public:
     QRectF clipRect() const { return m_clip_rect; }
     void setClipRect(const QRectF &clip) { m_clip_rect = clip; }
 
+    void setCurveThresholdFromTransform(const QTransform &transform)
+    {
+        qreal scale;
+        qt_scaleForTransform(transform, &scale);
+        setCurveThreshold(scale == 0 ? qreal(0.5) : (qreal(0.5) / scale));
+    }
+
+    void setCurveThreshold(qfixed threshold) { m_curveThreshold = threshold; }
+    qfixed curveThreshold() const { return m_curveThreshold; }
+
 protected:
     inline void emitMoveTo(qfixed x, qfixed y);
     inline void emitLineTo(qfixed x, qfixed y);
@@ -170,6 +183,7 @@ protected:
     QDataBuffer<Element> m_elements;
 
     QRectF m_clip_rect;
+    qfixed m_curveThreshold;
 
     void *m_customData;
     qStrokerMoveToHook m_moveTo;
@@ -208,9 +222,6 @@ public:
     void setMiterLimit(qfixed length) { m_miterLimit = length; }
     qfixed miterLimit() const { return m_miterLimit; }
 
-    void setCurveThreshold(qfixed threshold) { m_curveThreshold = threshold; }
-    qfixed curveThreshold() const { return m_curveThreshold; }
-
     void joinPoints(qfixed x, qfixed y, const QLineF &nextLine, LineJoinMode join);
     inline void emitMoveTo(qfixed x, qfixed y);
     inline void emitLineTo(qfixed x, qfixed y);
@@ -227,7 +238,6 @@ protected:
 
     qfixed m_strokeWidth;
     qfixed m_miterLimit;
-    qfixed m_curveThreshold;
 
     LineJoinMode m_capStyle;
     LineJoinMode m_joinStyle;
diff --git a/src/gui/painting/qtextureglyphcache_p.h b/src/gui/painting/qtextureglyphcache_p.h
index 390fe51..a818978 100644
--- a/src/gui/painting/qtextureglyphcache_p.h
+++ b/src/gui/painting/qtextureglyphcache_p.h
@@ -125,7 +125,7 @@ protected:
 };
 
 
-class QImageTextureGlyphCache : public QTextureGlyphCache
+class Q_GUI_EXPORT QImageTextureGlyphCache : public QTextureGlyphCache
 {
 public:
     QImageTextureGlyphCache(QFontEngineGlyphCache::Type type, const QTransform &matrix)
diff --git a/src/gui/painting/qtransform.cpp b/src/gui/painting/qtransform.cpp
index 80b7520..aaa241f 100644
--- a/src/gui/painting/qtransform.cpp
+++ b/src/gui/painting/qtransform.cpp
@@ -1545,12 +1545,19 @@ static inline bool lineTo_clipped(QPainterPath &path, const QTransform &transfor
 
     return true;
 }
+Q_GUI_EXPORT bool qt_scaleForTransform(const QTransform &transform, qreal *scale);
 
 static inline bool cubicTo_clipped(QPainterPath &path, const QTransform &transform, const QPointF &a, const QPointF &b, const QPointF &c, const QPointF &d, bool needsMoveTo)
 {
     // Convert projective xformed curves to line
     // segments so they can be transformed more accurately
-    QPolygonF segment = QBezier::fromPoints(a, b, c, d).toPolygon();
+
+    qreal scale;
+    qt_scaleForTransform(transform, &scale);
+
+    qreal curveThreshold = scale == 0 ? qreal(0.25) : (qreal(0.25) / scale);
+
+    QPolygonF segment = QBezier::fromPoints(a, b, c, d).toPolygon(curveThreshold);
 
     for (int i = 0; i < segment.size() - 1; ++i)
         if (lineTo_clipped(path, transform, segment.at(i), segment.at(i+1), needsMoveTo))
diff --git a/src/gui/styles/qmacstyle_mac.mm b/src/gui/styles/qmacstyle_mac.mm
index f5b0b0c..e065bcc 100644
--- a/src/gui/styles/qmacstyle_mac.mm
+++ b/src/gui/styles/qmacstyle_mac.mm
@@ -97,6 +97,7 @@
 #include <qdebug.h>
 #include <qlibrary.h>
 #include <qdatetimeedit.h>
+#include <qmath.h>
 #include <QtGui/qgraphicsproxywidget.h>
 #include <QtGui/qgraphicsview.h>
 #include <private/qt_cocoa_helpers_mac_p.h>
@@ -2142,6 +2143,9 @@ int QMacStyle::pixelMetric(PixelMetric metric, const QStyleOption *opt, const QW
         // The combo box popup has no frame.
         if (qstyleoption_cast<const QStyleOptionComboBox *>(opt) != 0)
             ret = 0;
+        // Frame of mac style line edits is two pixels on top and one on the bottom
+        else if (qobject_cast<const QLineEdit *>(widget) != 0)
+            ret = 2;
         else
             ret = 1;
         break;
@@ -5437,14 +5441,12 @@ QRect QMacStyle::subControlRect(ComplexControl cc, const QStyleOptionComplex *op
                     CGFloat height;
                     QCFString groupText = qt_mac_removeMnemonics(groupBox->text);
                     HIThemeGetTextDimensions(groupText, 0, &tti, &width, &height, 0);
-                    tw = int(width);
-                    h = int(height);
+                    tw = qRound(width);
+                    h = qCeil(height);
                 } else {
-                    QFontMetrics fm = groupBox->fontMetrics;
-                    if (!checkable && !fontIsSet)
-                        fm = QFontMetrics(qt_app_fonts_hash()->value("QSmallFont", QFont()));
-                    h = fm.height();
-                    tw = fm.size(Qt::TextShowMnemonic, groupBox->text).width();
+                    QFontMetricsF fm = QFontMetricsF(groupBox->fontMetrics);
+                    h = qCeil(fm.height());
+                    tw = qCeil(fm.size(Qt::TextShowMnemonic, groupBox->text).width());
                 }
                 ret.setHeight(h);
 
@@ -5491,10 +5493,10 @@ QRect QMacStyle::subControlRect(ComplexControl cc, const QStyleOptionComplex *op
                         fm = QFontMetrics(qt_app_fonts_hash()->value("QSmallFont", QFont()));
                     yOffset = 5;
                     if (hasNoText)
-                        yOffset = -fm.height();
+                        yOffset = -qCeil(QFontMetricsF(fm).height());
                 }
 
-                ret = opt->rect.adjusted(0, fm.height() + yOffset, 0, 0);
+                ret = opt->rect.adjusted(0, qCeil(QFontMetricsF(fm).height()) + yOffset, 0, 0);
                 if (sc == SC_GroupBoxContents)
                     ret.adjust(3, 3, -3, -4);    // guess
             }
diff --git a/src/gui/text/qtextengine_p.h b/src/gui/text/qtextengine_p.h
index 5054b66..d92148f 100644
--- a/src/gui/text/qtextengine_p.h
+++ b/src/gui/text/qtextengine_p.h
@@ -389,7 +389,7 @@ struct Q_AUTOTEST_EXPORT QScriptLine
     mutable uint gridfitted : 1;
     uint hasTrailingSpaces : 1;
     uint leadingIncluded : 1;
-    QFixed height() const { return ascent + descent + 1
+    QFixed height() const { return (ascent + descent).ceil() + 1
                             + (leadingIncluded?  qMax(QFixed(),leading) : QFixed()); }
     QFixed base() const { return ascent
                           + (leadingIncluded ? qMax(QFixed(),leading) : QFixed()); }
diff --git a/src/gui/widgets/qcombobox.cpp b/src/gui/widgets/qcombobox.cpp
index ca58e6d..e0b09aa 100644
--- a/src/gui/widgets/qcombobox.cpp
+++ b/src/gui/widgets/qcombobox.cpp
@@ -56,6 +56,7 @@
 #include <qscrollbar.h>
 #include <qtreeview.h>
 #include <qheaderview.h>
+#include <qmath.h>
 #ifndef QT_NO_IM
 #include "qinputcontext.h"
 #endif
@@ -328,7 +329,7 @@ QSize QComboBoxPrivate::recomputeSizeHint(QSize &sh) const
 
 
         // height
-        sh.setHeight(qMax(fm.height(), 14) + 2);
+        sh.setHeight(qMax(qCeil(QFontMetricsF(fm).height()), 14) + 2);
         if (hasIcon) {
             sh.setHeight(qMax(sh.height(), iconSize.height() + 2));
         }
diff --git a/src/gui/widgets/qcommandlinkbutton.cpp b/src/gui/widgets/qcommandlinkbutton.cpp
index 6919bc0..e8fe299 100644
--- a/src/gui/widgets/qcommandlinkbutton.cpp
+++ b/src/gui/widgets/qcommandlinkbutton.cpp
@@ -46,6 +46,7 @@
 #include "qtextlayout.h"
 #include "qcolor.h"
 #include "qfont.h"
+#include <qmath.h>
 
 #include "private/qpushbutton_p.h"
 
@@ -242,7 +243,7 @@ int QCommandLinkButtonPrivate::descriptionHeight(int widgetWidth) const
         }
         layout.endLayout();
     }
-    return qRound(descriptionheight);
+    return qCeil(descriptionheight);
 }
 
 /*!
diff --git a/src/gui/widgets/qdockarealayout.cpp b/src/gui/widgets/qdockarealayout.cpp
index 806654c..171000b 100644
--- a/src/gui/widgets/qdockarealayout.cpp
+++ b/src/gui/widgets/qdockarealayout.cpp
@@ -225,7 +225,7 @@ static const int zero = 0;
 QDockAreaLayoutInfo::QDockAreaLayoutInfo()
     : sep(&zero), dockPos(QInternal::LeftDock), o(Qt::Horizontal), mainWindow(0)
 #ifndef QT_NO_TABBAR
-    , tabbed(false), tabBar(0), tabBarShape(QTabBar::RoundedSouth), tabBarVisible(false)
+    , tabbed(false), tabBar(0), tabBarShape(QTabBar::RoundedSouth)
 #endif
 {
 }
@@ -235,7 +235,7 @@ QDockAreaLayoutInfo::QDockAreaLayoutInfo(const int *_sep, QInternal::DockPositio
                                             QMainWindow *window)
     : sep(_sep), dockPos(_dockPos), o(_o), mainWindow(window)
 #ifndef QT_NO_TABBAR
-    , tabbed(false), tabBar(0), tabBarShape(static_cast<QTabBar::Shape>(tbshape)), tabBarVisible(false)
+    , tabbed(false), tabBar(0), tabBarShape(static_cast<QTabBar::Shape>(tbshape))
 #endif
 {
 #ifdef QT_NO_TABBAR
@@ -296,8 +296,8 @@ QSize QDockAreaLayoutInfo::minimumSize() const
     rperp(o, result) = b;
 
 #ifndef QT_NO_TABBAR
-    if (tabbed) {
-        QSize tbm = tabBarMinimumSize();
+    QSize tbm = tabBarMinimumSize();
+    if (!tbm.isNull()) {
         switch (tabBarShape) {
             case QTabBar::RoundedNorth:
             case QTabBar::RoundedSouth:
@@ -369,8 +369,8 @@ QSize QDockAreaLayoutInfo::maximumSize() const
     rperp(o, result) = b;
 
 #ifndef QT_NO_TABBAR
-    if (tabbed) {
-        QSize tbh = tabBarSizeHint();
+    QSize tbh = tabBarSizeHint();
+    if (!tbh.isNull()) {
         switch (tabBarShape) {
             case QTabBar::RoundedNorth:
             case QTabBar::RoundedSouth:
@@ -1500,7 +1500,7 @@ void QDockAreaLayoutInfo::apply(bool animate)
         QRect tab_rect;
         QSize tbh = tabBarSizeHint();
 
-        if (tabBarVisible) {
+        if (!tbh.isNull()) {
             switch (tabBarShape) {
                 case QTabBar::RoundedNorth:
                 case QTabBar::TriangularNorth:
@@ -2079,10 +2079,11 @@ void QDockAreaLayoutInfo::updateSeparatorWidgets() const
 #endif //QT_NO_TABBAR
 
 #ifndef QT_NO_TABBAR
-void QDockAreaLayoutInfo::updateTabBar() const
+//returns whether the tabbar is visible or not
+bool QDockAreaLayoutInfo::updateTabBar() const
 {
     if (!tabbed)
-        return;
+        return false;
 
     QDockAreaLayoutInfo *that = const_cast<QDockAreaLayoutInfo*>(this);
 
@@ -2150,12 +2151,8 @@ void QDockAreaLayoutInfo::updateTabBar() const
 
     tabBar->blockSignals(blocked);
 
-    that->tabBarVisible = ( (gap ? 1 : 0) + tabBar->count()) > 1;
-
-    if (changed || !tabBarMin.isValid() | !tabBarHint.isValid()) {
-        that->tabBarMin = tabBar->minimumSizeHint();
-        that->tabBarHint = tabBar->sizeHint();
-    }
+    //returns if the tabbar is visible or not
+    return ( (gap ? 1 : 0) + tabBar->count()) > 1;
 }
 
 void QDockAreaLayoutInfo::setTabBarShape(int shape)
@@ -2163,11 +2160,8 @@ void QDockAreaLayoutInfo::setTabBarShape(int shape)
     if (shape == tabBarShape)
         return;
     tabBarShape = shape;
-    if (tabBar != 0) {
+    if (tabBar != 0)
         tabBar->setShape(static_cast<QTabBar::Shape>(shape));
-        tabBarMin = QSize();
-        tabBarHint = QSize();
-    }
 
     for (int i = 0; i < item_list.count(); ++i) {
         QDockAreaLayoutItem &item = item_list[i];
@@ -2178,22 +2172,18 @@ void QDockAreaLayoutInfo::setTabBarShape(int shape)
 
 QSize QDockAreaLayoutInfo::tabBarMinimumSize() const
 {
-    if (!tabbed)
+    if (!updateTabBar())
         return QSize(0, 0);
 
-    updateTabBar();
-
-    return tabBarMin;
+    return tabBar->minimumSizeHint();
 }
 
 QSize QDockAreaLayoutInfo::tabBarSizeHint() const
 {
-    if (!tabbed)
+    if (!updateTabBar())
         return QSize(0, 0);
 
-    updateTabBar();
-
-    return tabBarHint;
+    return tabBar->sizeHint();
 }
 
 QSet<QTabBar*> QDockAreaLayoutInfo::usedTabBars() const
@@ -2240,7 +2230,7 @@ QRect QDockAreaLayoutInfo::tabContentRect() const
     QRect result = rect;
     QSize tbh = tabBarSizeHint();
 
-    if (tabBarVisible) {
+    if (!tbh.isNull()) {
         switch (tabBarShape) {
             case QTabBar::RoundedNorth:
             case QTabBar::TriangularNorth:
diff --git a/src/gui/widgets/qdockarealayout_p.h b/src/gui/widgets/qdockarealayout_p.h
index 0088f00..9cb77ba 100644
--- a/src/gui/widgets/qdockarealayout_p.h
+++ b/src/gui/widgets/qdockarealayout_p.h
@@ -208,11 +208,9 @@ public:
     QRect tabContentRect() const;
     bool tabbed;
     QTabBar *tabBar;
-    QSize tabBarMin, tabBarHint;
     int tabBarShape;
-    bool tabBarVisible;
 
-    void updateTabBar() const;
+    bool updateTabBar() const;
     void setTabBarShape(int shape);
     QSize tabBarMinimumSize() const;
     QSize tabBarSizeHint() const;
diff --git a/src/gui/widgets/qdockwidget.cpp b/src/gui/widgets/qdockwidget.cpp
index 54189de..11f0a94 100644
--- a/src/gui/widgets/qdockwidget.cpp
+++ b/src/gui/widgets/qdockwidget.cpp
@@ -1269,12 +1269,11 @@ void QDockWidget::setFloating(bool floating)
     QRect r = d->undockedGeometry;
 
     d->setWindowState(floating, false, floating ? r : QRect());
+
     if (floating && r.isNull()) {
-        QDockWidgetLayout *layout = qobject_cast<QDockWidgetLayout*>(this->layout());
-        QRect titleArea = layout->titleArea();
-        int h = layout->verticalTitleBar ? titleArea.width() : titleArea.height();
-        QPoint p = mapToGlobal(QPoint(h, h));
-        move(p);
+        if (x() < 0 || y() < 0) //may happen if we have been hidden
+            move(QPoint());
+        setAttribute(Qt::WA_Moved, false); //we want it at the default position
     }
 }