Merge branch '4.6' of git@scm.dev.nokia.troll.no:qt/oslo-staging-1 into 4.6

21 files changed, 378 insertions, 181 deletions

diff --git a/src/gui/dialogs/qprintpreviewdialog.cpp b/src/gui/dialogs/qprintpreviewdialog.cpp
index 42be780..6723b53 100644
--- a/src/gui/dialogs/qprintpreviewdialog.cpp
+++ b/src/gui/dialogs/qprintpreviewdialog.cpp
@@ -207,6 +207,9 @@ public:
     QActionGroup *printerGroup;
     QAction *printAction;
     QAction *pageSetupAction;
+#if defined(Q_WS_MAC) && !defined(QT_MAC_USE_COCOA)
+    QAction *closeAction;
+#endif
 
     QPointer<QObject> receiverToDisconnectOnClose;
     QByteArray memberToDisconnectOnClose;
@@ -287,6 +290,9 @@ void QPrintPreviewDialogPrivate::init(QPrinter *_printer)
     toolbar->addSeparator();
     toolbar->addAction(pageSetupAction);
     toolbar->addAction(printAction);
+#if defined(Q_WS_MAC) && !defined(QT_MAC_USE_COCOA)
+    toolbar->addAction(closeAction);
+#endif
 
     // Cannot use the actions' triggered signal here, since it doesn't autorepeat
     QToolButton *zoomInButton = static_cast<QToolButton *>(toolbar->widgetForAction(zoomInAction));
@@ -406,6 +412,10 @@ void QPrintPreviewDialogPrivate::setupActions()
     qt_setupActionIcon(pageSetupAction, QLatin1String("page-setup"));
     QObject::connect(printAction, SIGNAL(triggered(bool)), q, SLOT(_q_print()));
     QObject::connect(pageSetupAction, SIGNAL(triggered(bool)), q, SLOT(_q_pageSetup()));
+#if defined(Q_WS_MAC) && !defined(QT_MAC_USE_COCOA)
+    closeAction = printerGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Close"));
+    QObject::connect(closeAction, SIGNAL(triggered(bool)), q, SLOT(reject()));
+#endif
 
     // Initial state:
     fitPageAction->setChecked(true);
diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp
index b633b41..10d31ea 100644
--- a/src/gui/graphicsview/qgraphicsitem.cpp
+++ b/src/gui/graphicsview/qgraphicsitem.cpp
@@ -811,8 +811,36 @@ void QGraphicsItemPrivate::updateAncestorFlag(QGraphicsItem::GraphicsItemFlag ch
             return;
     }
 
-    foreach (QGraphicsItem *child, children)
-        child->d_ptr->updateAncestorFlag(childFlag, flag, enabled, false);
+    for (int i = 0; i < children.size(); ++i)
+        children.at(i)->d_ptr->updateAncestorFlag(childFlag, flag, enabled, false);
+}
+
+void QGraphicsItemPrivate::updateAncestorFlags()
+{
+    int flags = 0;
+    if (parent) {
+        // Inherit the parent's ancestor flags.
+        QGraphicsItemPrivate *pd = parent->d_ptr.data();
+        flags = pd->ancestorFlags;
+
+        // Add in flags from the parent.
+        if (pd->filtersDescendantEvents)
+            flags |= AncestorFiltersChildEvents;
+        if (pd->handlesChildEvents)
+            flags |= AncestorHandlesChildEvents;
+        if (pd->flags & QGraphicsItem::ItemClipsChildrenToShape)
+            flags |= AncestorClipsChildren;
+        if (pd->flags & QGraphicsItem::ItemIgnoresTransformations)
+            flags |= AncestorIgnoresTransformations;
+    }
+
+    if (ancestorFlags == flags)
+        return; // No change; stop propagation.
+    ancestorFlags = flags;
+
+    // Propagate to children recursively.
+    for (int i = 0; i < children.size(); ++i)
+        children.at(i)->d_ptr->updateAncestorFlags();
 }
 
 /*!
@@ -997,25 +1025,17 @@ QVariant QGraphicsItemPrivate::inputMethodQueryHelper(Qt::InputMethodQuery query
     prepareGeometryChange) if the item is in its destructor, i.e.
     inDestructor is 1.
 */
-void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent)
+void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent, const QVariant *newParentVariant,
+                                               const QVariant *thisPointerVariant)
 {
     Q_Q(QGraphicsItem);
-    if (newParent == q) {
-        qWarning("QGraphicsItem::setParentItem: cannot assign %p as a parent of itself", this);
-        return;
-    }
-    if (newParent == parent)
-        return;
-
-    const QVariant newParentVariant(q->itemChange(QGraphicsItem::ItemParentChange,
-                                                  qVariantFromValue<QGraphicsItem *>(newParent)));
-    newParent = qVariantValue<QGraphicsItem *>(newParentVariant);
     if (newParent == parent)
         return;
 
     if (scene) {
         // Deliver the change to the index
-        scene->d_func()->index->itemChange(q, QGraphicsItem::ItemParentChange, newParentVariant);
+        if (scene->d_func()->indexMethod != QGraphicsScene::NoIndex)
+            scene->d_func()->index->itemChange(q, QGraphicsItem::ItemParentChange, newParent);
 
         // Disable scene pos notifications for old ancestors
         if (scenePosDescendants || (flags & QGraphicsItem::ItemSendsScenePositionChanges))
@@ -1033,11 +1053,11 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent)
     if (!inDestructor)
         q_ptr->prepareGeometryChange();
 
-    const QVariant thisPointerVariant(qVariantFromValue<QGraphicsItem *>(q));
     if (parent) {
         // Remove from current parent
         parent->d_ptr->removeChild(q);
-        parent->itemChange(QGraphicsItem::ItemChildRemovedChange, thisPointerVariant);
+        if (thisPointerVariant)
+            parent->itemChange(QGraphicsItem::ItemChildRemovedChange, *thisPointerVariant);
     }
 
     // Update toplevelitem list. If this item is being deleted, its parent
@@ -1055,7 +1075,7 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent)
     QGraphicsItem *p = parent;
     QGraphicsItem *parentFocusScopeItem = 0;
     while (p) {
-        if (p->flags() & QGraphicsItem::ItemIsFocusScope) {
+        if (p->d_ptr->flags & QGraphicsItem::ItemIsFocusScope) {
             // If this item's focus scope's focus scope item points
             // to this item or a descendent, then clear it.
             QGraphicsItem *fsi = p->d_ptr->focusScopeItem;
@@ -1068,6 +1088,10 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent)
         p = p->d_ptr->parent;
     }
 
+    // Update graphics effect optimization flag
+    if (newParent && (graphicsEffect || mayHaveChildWithGraphicsEffect))
+        newParent->d_ptr->updateChildWithGraphicsEffectFlagRecursively();
+
     // Update focus scope item ptr in new scope.
     QGraphicsItem *newFocusScopeItem = subFocusItem ? subFocusItem : parentFocusScopeItem;
     if (newFocusScopeItem && newParent) {
@@ -1076,11 +1100,11 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent)
             QGraphicsItem *ancestorScope = 0;
             QGraphicsItem *p = subFocusItem->d_ptr->parent;
             while (p) {
-                if (p->flags() & QGraphicsItem::ItemIsFocusScope)
+                if (p->d_ptr->flags & QGraphicsItem::ItemIsFocusScope)
                     ancestorScope = p;
-                if (p->isPanel())
+                if (p->d_ptr->flags & QGraphicsItem::ItemIsPanel)
                     break;
-                p = p->parentItem();
+                p = p->d_ptr->parent;
             }
             if (ancestorScope)
                 newFocusScopeItem = ancestorScope;
@@ -1088,7 +1112,7 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent)
 
         QGraphicsItem *p = newParent;
         while (p) {
-            if (p->flags() & QGraphicsItem::ItemIsFocusScope) {
+            if (p->d_ptr->flags & QGraphicsItem::ItemIsFocusScope) {
                 p->d_ptr->focusScopeItem = newFocusScopeItem;
                 // Ensure the new item is no longer the subFocusItem. The
                 // only way to set focus on a child of a focus scope is
@@ -1102,52 +1126,45 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent)
     }
 
     if ((parent = newParent)) {
-        bool implicitUpdate = false;
         if (parent->d_func()->scene && parent->d_func()->scene != scene) {
             // Move this item to its new parent's scene
             parent->d_func()->scene->addItem(q);
-            implicitUpdate = true;
         } else if (!parent->d_func()->scene && scene) {
             // Remove this item from its former scene
             scene->removeItem(q);
         }
 
         parent->d_ptr->addChild(q);
-        parent->itemChange(QGraphicsItem::ItemChildAddedChange, thisPointerVariant);
+        if (thisPointerVariant)
+            parent->itemChange(QGraphicsItem::ItemChildAddedChange, *thisPointerVariant);
         if (scene) {
-            if (!implicitUpdate)
-                scene->d_func()->markDirty(q_ptr);
-
             // Re-enable scene pos notifications for new ancestors
             if (scenePosDescendants || (flags & QGraphicsItem::ItemSendsScenePositionChanges))
                 scene->d_func()->setScenePosItemEnabled(q, true);
         }
 
+        // Propagate dirty flags to the new parent
+        markParentDirty(/*updateBoundingRect=*/true);
+
         // Inherit ancestor flags from the new parent.
-        updateAncestorFlag(QGraphicsItem::GraphicsItemFlag(-2));
-        updateAncestorFlag(QGraphicsItem::GraphicsItemFlag(-1));
-        updateAncestorFlag(QGraphicsItem::ItemClipsChildrenToShape);
-        updateAncestorFlag(QGraphicsItem::ItemIgnoresTransformations);
+        updateAncestorFlags();
 
         // Update item visible / enabled.
-        if (parent->isVisible() != visible) {
-            if (!parent->isVisible() || !explicitlyHidden)
-                setVisibleHelper(parent->isVisible(), /* explicit = */ false, /* update = */ !implicitUpdate);
+        if (parent->d_ptr->visible != visible) {
+            if (!parent->d_ptr->visible || !explicitlyHidden)
+                setVisibleHelper(parent->d_ptr->visible, /* explicit = */ false, /* update = */ false);
         }
         if (parent->isEnabled() != enabled) {
-            if (!parent->isEnabled() || !explicitlyDisabled)
-                setEnabledHelper(parent->isEnabled(), /* explicit = */ false, /* update = */ !implicitUpdate);
+            if (!parent->d_ptr->enabled || !explicitlyDisabled)
+                setEnabledHelper(parent->d_ptr->enabled, /* explicit = */ false, /* update = */ false);
         }
 
         // Auto-activate if visible and the parent is active.
-        if (q->isVisible() && parent->isActive())
+        if (visible && parent->isActive())
             q->setActive(true);
     } else {
         // Inherit ancestor flags from the new parent.
-        updateAncestorFlag(QGraphicsItem::GraphicsItemFlag(-2));
-        updateAncestorFlag(QGraphicsItem::GraphicsItemFlag(-1));
-        updateAncestorFlag(QGraphicsItem::ItemClipsChildrenToShape);
-        updateAncestorFlag(QGraphicsItem::ItemIgnoresTransformations);
+        updateAncestorFlags();
 
         if (!inDestructor) {
             // Update item visible / enabled.
@@ -1155,10 +1172,6 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent)
                 setVisibleHelper(true, /* explicit = */ false);
             if (!enabled && !explicitlyDisabled)
                 setEnabledHelper(true, /* explicit = */ false);
-
-            // If the item is being deleted, the whole scene will be updated.
-            if (scene)
-                scene->d_func()->markDirty(q_ptr);
         }
     }
 
@@ -1174,7 +1187,8 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent)
     }
 
     // Deliver post-change notification
-    q->itemChange(QGraphicsItem::ItemParentHasChanged, newParentVariant);
+    if (newParentVariant)
+        q->itemChange(QGraphicsItem::ItemParentHasChanged, *newParentVariant);
 
     if (isObject)
         emit static_cast<QGraphicsObject *>(q)->parentChanged();
@@ -1363,7 +1377,7 @@ QGraphicsItem::~QGraphicsItem()
         d_ptr->scene->d_func()->removeItemHelper(this);
     } else {
         d_ptr->resetFocusProxy();
-        d_ptr->setParentItemHelper(0);
+        setParentItem(0);
     }
 
 #ifndef QT_NO_GRAPHICSEFFECT
@@ -1568,9 +1582,23 @@ const QGraphicsObject *QGraphicsItem::toGraphicsObject() const
 
     \sa parentItem(), childItems()
 */
-void QGraphicsItem::setParentItem(QGraphicsItem *parent)
+void QGraphicsItem::setParentItem(QGraphicsItem *newParent)
 {
-    d_ptr->setParentItemHelper(parent);
+    if (newParent == this) {
+        qWarning("QGraphicsItem::setParentItem: cannot assign %p as a parent of itself", this);
+        return;
+    }
+    if (newParent == d_ptr->parent)
+        return;
+
+    const QVariant newParentVariant(itemChange(QGraphicsItem::ItemParentChange,
+                                               qVariantFromValue<QGraphicsItem *>(newParent)));
+    newParent = qVariantValue<QGraphicsItem *>(newParentVariant);
+    if (newParent == d_ptr->parent)
+        return;
+
+    const QVariant thisPointerVariant(qVariantFromValue<QGraphicsItem *>(this));
+    d_ptr->setParentItemHelper(newParent, &newParentVariant, &thisPointerVariant);
 }
 
 /*!
@@ -1620,7 +1648,7 @@ bool QGraphicsItem::isWidget() const
 */
 bool QGraphicsItem::isWindow() const
 {
-    return isWidget() && (static_cast<const QGraphicsWidget *>(this)->windowType() & Qt::Window);
+    return d_ptr->isWidget && (static_cast<const QGraphicsWidget *>(this)->windowType() & Qt::Window);
 }
 
 /*!
@@ -1657,9 +1685,9 @@ QGraphicsItem::GraphicsItemFlags QGraphicsItem::flags() const
 void QGraphicsItem::setFlag(GraphicsItemFlag flag, bool enabled)
 {
     if (enabled)
-        setFlags(flags() | flag);
+        setFlags(GraphicsItemFlags(d_ptr->flags) | flag);
     else
-        setFlags(flags() & ~flag);
+        setFlags(GraphicsItemFlags(d_ptr->flags) & ~flag);
 }
 
 /*!
@@ -1706,8 +1734,8 @@ void QGraphicsItem::setFlags(GraphicsItemFlags flags)
     flags = GraphicsItemFlags(itemChange(ItemFlagsChange, quint32(flags)).toUInt());
     if (quint32(d_ptr->flags) == quint32(flags))
         return;
-    if (d_ptr->scene)
-        d_ptr->scene->d_func()->index->itemChange(this, ItemFlagsChange, quint32(flags));
+    if (d_ptr->scene && d_ptr->scene->d_func()->indexMethod != QGraphicsScene::NoIndex)
+        d_ptr->scene->d_func()->index->itemChange(this, ItemFlagsChange, &flags);
 
     // Flags that alter the geometry of the item (or its children).
     const quint32 geomChangeFlagsMask = (ItemClipsChildrenToShape | ItemClipsToShape | ItemIgnoresTransformations | ItemIsSelectable);
@@ -1716,7 +1744,7 @@ void QGraphicsItem::setFlags(GraphicsItemFlags flags)
         d_ptr->paintedViewBoundingRectsNeedRepaint = 1;
 
     // Keep the old flags to compare the diff.
-    GraphicsItemFlags oldFlags = this->flags();
+    GraphicsItemFlags oldFlags = GraphicsItemFlags(d_ptr->flags);
 
     // Update flags.
     d_ptr->flags = flags;
@@ -1745,7 +1773,23 @@ void QGraphicsItem::setFlags(GraphicsItemFlags flags)
         d_ptr->updateAncestorFlag(ItemIgnoresTransformations);
     }
 
+    if ((flags & ItemNegativeZStacksBehindParent) != (oldFlags & ItemNegativeZStacksBehindParent)) {
+        // NB! We change the flags directly here, so we must also update d_ptr->flags.
+        // Note that this has do be done before the ItemStacksBehindParent check
+        // below; otherwise we will loose the change.
+
+        // Update stack-behind.
+        if (d_ptr->z < qreal(0.0))
+            flags |= ItemStacksBehindParent;
+        else
+            flags &= ~ItemStacksBehindParent;
+        d_ptr->flags = flags;
+    }
+
     if ((flags & ItemStacksBehindParent) != (oldFlags & ItemStacksBehindParent)) {
+        // NB! This check has to come after the ItemNegativeZStacksBehindParent
+        // check above. Be careful.
+
         // Ensure child item sorting is up to date when toggling this flag.
         if (d_ptr->parent)
             d_ptr->parent->d_ptr->needSortChildren = 1;
@@ -1759,10 +1803,6 @@ void QGraphicsItem::setFlags(GraphicsItemFlags flags)
             d_ptr->scene->d_func()->updateInputMethodSensitivityInViews();
     }
 
-    if ((flags & ItemNegativeZStacksBehindParent) != (oldFlags & ItemNegativeZStacksBehindParent)) {
-        // Update stack-behind.
-        setFlag(ItemStacksBehindParent, d_ptr->z < qreal(0.0));
-    }
 
     if ((d_ptr->panelModality != NonModal)
         && d_ptr->scene
@@ -2536,7 +2576,9 @@ void QGraphicsItem::setOpacity(qreal opacity)
     // Update.
     if (d_ptr->scene) {
 #ifndef QT_NO_GRAPHICSEFFECT
-        d_ptr->invalidateGraphicsEffectsRecursively();
+        d_ptr->invalidateParentGraphicsEffectsRecursively();
+        if (!(d_ptr->flags & ItemDoesntPropagateOpacityToChildren))
+            d_ptr->invalidateChildGraphicsEffectsRecursively(QGraphicsItemPrivate::OpacityChanged);
 #endif //QT_NO_GRAPHICSEFFECT
         d_ptr->scene->d_func()->markDirty(this, QRectF(),
                                           /*invalidateChildren=*/true,
@@ -2581,6 +2623,8 @@ void QGraphicsItem::setGraphicsEffect(QGraphicsEffect *effect)
     if (d_ptr->graphicsEffect) {
         delete d_ptr->graphicsEffect;
         d_ptr->graphicsEffect = 0;
+    } else if (d_ptr->parent) {
+        d_ptr->parent->d_ptr->updateChildWithGraphicsEffectFlagRecursively();
     }
 
     if (effect) {
@@ -2594,6 +2638,19 @@ void QGraphicsItem::setGraphicsEffect(QGraphicsEffect *effect)
 }
 #endif //QT_NO_GRAPHICSEFFECT
 
+void QGraphicsItemPrivate::updateChildWithGraphicsEffectFlagRecursively()
+{
+#ifndef QT_NO_GRAPHICSEFFECT
+    QGraphicsItemPrivate *itemPrivate = this;
+    do {
+        // parent chain already notified?
+        if (itemPrivate->mayHaveChildWithGraphicsEffect)
+            return;
+        itemPrivate->mayHaveChildWithGraphicsEffect = 1;
+    } while ((itemPrivate = itemPrivate->parent ? itemPrivate->parent->d_ptr.data() : 0));
+#endif
+}
+
 /*!
     \internal
     \since 4.6
@@ -4277,9 +4334,9 @@ void QGraphicsItem::setZValue(qreal z)
     if (newZ == d_ptr->z)
         return;
 
-    if (d_ptr->scene) {
+    if (d_ptr->scene && d_ptr->scene->d_func()->indexMethod != QGraphicsScene::NoIndex) {
         // Z Value has changed, we have to notify the index.
-        d_ptr->scene->d_func()->index->itemChange(this, ItemZValueChange, newZVariant);
+        d_ptr->scene->d_func()->index->itemChange(this, ItemZValueChange, &newZ);
     }
 
     d_ptr->z = newZ;
@@ -5046,7 +5103,7 @@ int QGraphicsItemPrivate::depth() const
     \internal
 */
 #ifndef QT_NO_GRAPHICSEFFECT
-void QGraphicsItemPrivate::invalidateGraphicsEffectsRecursively()
+void QGraphicsItemPrivate::invalidateParentGraphicsEffectsRecursively()
 {
     QGraphicsItemPrivate *itemPrivate = this;
     do {
@@ -5058,6 +5115,24 @@ void QGraphicsItemPrivate::invalidateGraphicsEffectsRecursively()
         }
     } while ((itemPrivate = itemPrivate->parent ? itemPrivate->parent->d_ptr.data() : 0));
 }
+
+void QGraphicsItemPrivate::invalidateChildGraphicsEffectsRecursively(QGraphicsItemPrivate::InvalidateReason reason)
+{
+    if (!mayHaveChildWithGraphicsEffect)
+        return;
+
+    for (int i = 0; i < children.size(); ++i) {
+        QGraphicsItemPrivate *childPrivate = children.at(i)->d_ptr.data();
+        if (reason == OpacityChanged && (childPrivate->flags & QGraphicsItem::ItemIgnoresParentOpacity))
+            continue;
+        if (childPrivate->graphicsEffect) {
+            childPrivate->notifyInvalidated = 1;
+            static_cast<QGraphicsItemEffectSourcePrivate *>(childPrivate->graphicsEffect->d_func()->source->d_func())->invalidateCache();
+        }
+
+        childPrivate->invalidateChildGraphicsEffectsRecursively(reason);
+    }
+}
 #endif //QT_NO_GRAPHICSEFFECT
 
 /*!
@@ -5302,7 +5377,7 @@ void QGraphicsItem::update(const QRectF &rect)
 
     // Make sure we notify effects about invalidated source.
 #ifndef QT_NO_GRAPHICSEFFECT
-    d_ptr->invalidateGraphicsEffectsRecursively();
+    d_ptr->invalidateParentGraphicsEffectsRecursively();
 #endif //QT_NO_GRAPHICSEFFECT
 
     if (CacheMode(d_ptr->cacheMode) != NoCache) {
@@ -7195,19 +7270,7 @@ void QGraphicsItem::prepareGeometryChange()
         }
     }
 
-    QGraphicsItem *parent = this;
-    while ((parent = parent->d_ptr->parent)) {
-        QGraphicsItemPrivate *parentp = parent->d_ptr.data();
-        parentp->dirtyChildrenBoundingRect = 1;
-        // ### Only do this if the parent's effect applies to the entire subtree.
-        parentp->notifyBoundingRectChanged = 1;
-#ifndef QT_NO_GRAPHICSEFFECT
-        if (parentp->scene && parentp->graphicsEffect) {
-            parentp->notifyInvalidated = 1;
-            static_cast<QGraphicsItemEffectSourcePrivate *>(parentp->graphicsEffect->d_func()->source->d_func())->invalidateCache();
-        }
-#endif
-    }
+    d_ptr->markParentDirty(/*updateBoundingRect=*/true);
 }
 
 /*!
diff --git a/src/gui/graphicsview/qgraphicsitem_p.h b/src/gui/graphicsview/qgraphicsitem_p.h
index 2d34b80..5ad6cd5 100644
--- a/src/gui/graphicsview/qgraphicsitem_p.h
+++ b/src/gui/graphicsview/qgraphicsitem_p.h
@@ -153,7 +153,7 @@ public:
         dirtyChildren(0),
         localCollisionHack(0),
         inSetPosHelper(0),
-        needSortChildren(1), // ### can be 0 by default?
+        needSortChildren(0),
         allChildrenDirty(0),
         fullUpdatePending(0),
         flags(0),
@@ -178,6 +178,8 @@ public:
         sequentialOrdering(1),
         updateDueToGraphicsEffect(0),
         scenePosDescendants(0),
+        pendingPolish(0),
+        mayHaveChildWithGraphicsEffect(0),
         globalStackingOrder(-1),
         q_ptr(0)
     {
@@ -195,8 +197,10 @@ public:
         return item->d_ptr.data();
     }
 
+    void updateChildWithGraphicsEffectFlagRecursively();
     void updateAncestorFlag(QGraphicsItem::GraphicsItemFlag childFlag,
                             AncestorFlag flag = NoFlag, bool enabled = false, bool root = true);
+    void updateAncestorFlags();
     void setIsMemberOfGroup(bool enabled);
     void remapItemPos(QEvent *event, QGraphicsItem *item);
     QPointF genericMapFromScene(const QPointF &pos, const QWidget *viewport) const;
@@ -223,13 +227,18 @@ public:
                               bool ignoreDirtyBit = false, bool ignoreOpacity = false) const;
     int depth() const;
 #ifndef QT_NO_GRAPHICSEFFECT
-    void invalidateGraphicsEffectsRecursively();
+    enum InvalidateReason {
+        OpacityChanged
+    };
+    void invalidateParentGraphicsEffectsRecursively();
+    void invalidateChildGraphicsEffectsRecursively(InvalidateReason reason);
 #endif //QT_NO_GRAPHICSEFFECT
     void invalidateDepthRecursively();
     void resolveDepth();
     void addChild(QGraphicsItem *child);
     void removeChild(QGraphicsItem *child);
-    void setParentItemHelper(QGraphicsItem *parent);
+    void setParentItemHelper(QGraphicsItem *parent, const QVariant *newParentVariant,
+                             const QVariant *thisPointerVariant);
     void childrenBoundingRectHelper(QTransform *x, QRectF *rect);
     void initStyleOption(QStyleOptionGraphicsItem *option, const QTransform &worldTransform,
                          const QRegion &exposedRegion, bool allItems = false) const;
@@ -397,6 +406,8 @@ public:
         return !visible || (childrenCombineOpacity() && isFullyTransparent());
     }
 
+    inline void markParentDirty(bool updateBoundingRect = false);
+
     void setFocusHelper(Qt::FocusReason focusReason, bool climb);
     void setSubFocus(QGraphicsItem *rootItem = 0);
     void clearSubFocus(QGraphicsItem *rootItem = 0);
@@ -484,6 +495,8 @@ public:
     quint32 sequentialOrdering : 1;
     quint32 updateDueToGraphicsEffect : 1;
     quint32 scenePosDescendants : 1;
+    quint32 pendingPolish : 1;
+    quint32 mayHaveChildWithGraphicsEffect : 1;
 
     // Optional stacking order
     int globalStackingOrder;
@@ -721,11 +734,13 @@ inline QTransform QGraphicsItemPrivate::transformToParent() const
 inline void QGraphicsItemPrivate::ensureSortedChildren()
 {
     if (needSortChildren) {
-        qSort(children.begin(), children.end(), qt_notclosestLeaf);
         needSortChildren = 0;
         sequentialOrdering = 1;
+        if (children.isEmpty())
+            return;
+        qSort(children.begin(), children.end(), qt_notclosestLeaf);
         for (int i = 0; i < children.size(); ++i) {
-            if (children[i]->d_ptr->siblingIndex != i) {
+            if (children.at(i)->d_ptr->siblingIndex != i) {
                 sequentialOrdering = 0;
                 break;
             }
@@ -741,6 +756,37 @@ inline bool QGraphicsItemPrivate::insertionOrder(QGraphicsItem *a, QGraphicsItem
     return a->d_ptr->siblingIndex < b->d_ptr->siblingIndex;
 }
 
+/*!
+    \internal
+*/
+inline void QGraphicsItemPrivate::markParentDirty(bool updateBoundingRect)
+{
+    QGraphicsItemPrivate *parentp = this;
+    while (parentp->parent) {
+        parentp = parentp->parent->d_ptr.data();
+        parentp->dirtyChildren = 1;
+
+        if (updateBoundingRect) {
+            parentp->dirtyChildrenBoundingRect = 1;
+            // ### Only do this if the parent's effect applies to the entire subtree.
+            parentp->notifyBoundingRectChanged = 1;
+        }
+#ifndef QT_NO_GRAPHICSEFFECT
+        if (parentp->graphicsEffect) {
+            if (updateBoundingRect) {
+                parentp->notifyInvalidated = 1;
+                static_cast<QGraphicsItemEffectSourcePrivate *>(parentp->graphicsEffect->d_func()
+                                                                ->source->d_func())->invalidateCache();
+            }
+            if (parentp->graphicsEffect->isEnabled()) {
+                parentp->dirty = 1;
+                parentp->fullUpdatePending = 1;
+            }
+        }
+#endif
+    }
+}
+
 QT_END_NAMESPACE
 
 #endif // QT_NO_GRAPHICSVIEW
diff --git a/src/gui/graphicsview/qgraphicsscene.cpp b/src/gui/graphicsview/qgraphicsscene.cpp
index cea723c..9219773 100644
--- a/src/gui/graphicsview/qgraphicsscene.cpp
+++ b/src/gui/graphicsview/qgraphicsscene.cpp
@@ -292,7 +292,6 @@ QGraphicsScenePrivate::QGraphicsScenePrivate()
       processDirtyItemsEmitted(false),
       selectionChanging(0),
       needSortTopLevelItems(true),
-      unpolishedItemsModified(true),
       holesInTopLevelSiblingIndex(false),
       topLevelSequentialOrdering(true),
       scenePosDescendantsUpdatePending(false),
@@ -429,22 +428,38 @@ void QGraphicsScenePrivate::unregisterTopLevelItem(QGraphicsItem *item)
 */
 void QGraphicsScenePrivate::_q_polishItems()
 {
-    QSet<QGraphicsItem *>::Iterator it = unpolishedItems.begin();
+    if (unpolishedItems.isEmpty())
+        return;
+
     const QVariant booleanTrueVariant(true);
-    while (!unpolishedItems.isEmpty()) {
-        QGraphicsItem *item = *it;
-        it = unpolishedItems.erase(it);
-        unpolishedItemsModified = false;
-        if (!item->d_ptr->explicitlyHidden) {
+    QGraphicsItem *item = 0;
+    QGraphicsItemPrivate *itemd = 0;
+    const int oldUnpolishedCount = unpolishedItems.count();
+
+    for (int i = 0; i < oldUnpolishedCount; ++i) {
+        item = unpolishedItems.at(i);
+        if (!item)
+            continue;
+        itemd = item->d_ptr.data();
+        itemd->pendingPolish = false;
+        if (!itemd->explicitlyHidden) {
             item->itemChange(QGraphicsItem::ItemVisibleChange, booleanTrueVariant);
             item->itemChange(QGraphicsItem::ItemVisibleHasChanged, booleanTrueVariant);
         }
-        if (item->isWidget()) {
+        if (itemd->isWidget) {
             QEvent event(QEvent::Polish);
             QApplication::sendEvent((QGraphicsWidget *)item, &event);
         }
-        if (unpolishedItemsModified)
-            it = unpolishedItems.begin();
+    }
+
+    if (unpolishedItems.count() == oldUnpolishedCount) {
+        // No new items were added to the vector.
+        unpolishedItems.clear();
+    } else {
+        // New items were appended; keep them and remove the old ones.
+        unpolishedItems.remove(0, oldUnpolishedCount);
+        unpolishedItems.squeeze();
+        QMetaObject::invokeMethod(q_ptr, "_q_polishItems", Qt::QueuedConnection);
     }
 }
 
@@ -599,7 +614,7 @@ void QGraphicsScenePrivate::removeItemHelper(QGraphicsItem *item)
         if (parentItem->scene()) {
             Q_ASSERT_X(parentItem->scene() == q, "QGraphicsScene::removeItem",
                        "Parent item's scene is different from this item's scene");
-            item->d_ptr->setParentItemHelper(0);
+            item->setParentItem(0);
         }
     } else {
         unregisterTopLevelItem(item);
@@ -638,8 +653,12 @@ void QGraphicsScenePrivate::removeItemHelper(QGraphicsItem *item)
     selectedItems.remove(item);
     hoverItems.removeAll(item);
     cachedItemsUnderMouse.removeAll(item);
-    unpolishedItems.remove(item);
-    unpolishedItemsModified = true;
+    if (item->d_ptr->pendingPolish) {
+        const int unpolishedIndex = unpolishedItems.indexOf(item);
+        if (unpolishedIndex != -1)
+            unpolishedItems[unpolishedIndex] = 0;
+        item->d_ptr->pendingPolish = false;
+    }
     resetDirtyItem(item);
 
     //We remove all references of item from the sceneEventFilter arrays
@@ -1936,7 +1955,7 @@ QList<QGraphicsItem *> QGraphicsScene::items(const QRectF &rectangle, Qt::ItemSe
     \since 4.3
 
     This convenience function is equivalent to calling items(QRectF(\a x, \a y, \a w, \a h), \a mode).
-    
+
     This function is deprecated and returns incorrect results if the scene
     contains items that ignore transformations. Use the overload that takes
     a QTransform instead.
@@ -2482,12 +2501,12 @@ void QGraphicsScene::addItem(QGraphicsItem *item)
         qWarning("QGraphicsScene::addItem: cannot add null item");
         return;
     }
-    if (item->scene() == this) {
+    if (item->d_ptr->scene == this) {
         qWarning("QGraphicsScene::addItem: item has already been added to this scene");
         return;
     }
     // Remove this item from its existing scene
-    if (QGraphicsScene *oldScene = item->scene())
+    if (QGraphicsScene *oldScene = item->d_ptr->scene)
         oldScene->removeItem(item);
 
     // Notify the item that its scene is changing, and allow the item to
@@ -2496,15 +2515,20 @@ void QGraphicsScene::addItem(QGraphicsItem *item)
                                                     qVariantFromValue<QGraphicsScene *>(this)));
     QGraphicsScene *targetScene = qVariantValue<QGraphicsScene *>(newSceneVariant);
     if (targetScene != this) {
-        if (targetScene && item->scene() != targetScene)
+        if (targetScene && item->d_ptr->scene != targetScene)
             targetScene->addItem(item);
         return;
     }
 
+    if (d->unpolishedItems.isEmpty())
+        QMetaObject::invokeMethod(this, "_q_polishItems", Qt::QueuedConnection);
+    d->unpolishedItems.append(item);
+    item->d_ptr->pendingPolish = true;
+
     // Detach this item from its parent if the parent's scene is different
     // from this scene.
-    if (QGraphicsItem *itemParent = item->parentItem()) {
-        if (itemParent->scene() != this)
+    if (QGraphicsItem *itemParent = item->d_ptr->parent) {
+        if (itemParent->d_ptr->scene != this)
             item->setParentItem(0);
     }
 
@@ -2534,7 +2558,7 @@ void QGraphicsScene::addItem(QGraphicsItem *item)
         d->enableMouseTrackingOnViews();
     }
 #ifndef QT_NO_CURSOR
-    if (d->allItemsUseDefaultCursor && item->hasCursor()) {
+    if (d->allItemsUseDefaultCursor && item->d_ptr->hasCursor) {
         d->allItemsUseDefaultCursor = false;
         if (d->allItemsIgnoreHoverEvents) // already enabled otherwise
             d->enableMouseTrackingOnViews();
@@ -2542,7 +2566,7 @@ void QGraphicsScene::addItem(QGraphicsItem *item)
 #endif //QT_NO_CURSOR
 
     // Enable touch events if the item accepts touch events.
-    if (d->allItemsIgnoreTouchEvents && item->acceptTouchEvents()) {
+    if (d->allItemsIgnoreTouchEvents && item->d_ptr->acceptTouchEvents) {
         d->allItemsIgnoreTouchEvents = false;
         d->enableTouchEventsOnViews();
     }
@@ -2575,17 +2599,14 @@ void QGraphicsScene::addItem(QGraphicsItem *item)
     }
 
     // Add all children recursively
-    foreach (QGraphicsItem *child, item->children())
-        addItem(child);
+    item->d_ptr->ensureSortedChildren();
+    for (int i = 0; i < item->d_ptr->children.size(); ++i)
+        addItem(item->d_ptr->children.at(i));
 
     // Resolve font and palette.
     item->d_ptr->resolveFont(d->font.resolve());
     item->d_ptr->resolvePalette(d->palette.resolve());
 
-    if (d->unpolishedItems.isEmpty())
-        QMetaObject::invokeMethod(this, "_q_polishItems", Qt::QueuedConnection);
-    d->unpolishedItems.insert(item);
-    d->unpolishedItemsModified = true;
 
     // Reenable selectionChanged() for individual items
     --d->selectionChanging;
@@ -2619,7 +2640,7 @@ void QGraphicsScene::addItem(QGraphicsItem *item)
         }
     }
 
-    if (item->flags() & QGraphicsItem::ItemSendsScenePositionChanges)
+    if (item->d_ptr->flags & QGraphicsItem::ItemSendsScenePositionChanges)
         d->registerScenePosItem(item);
 
     // Ensure that newly added items that have subfocus set, gain
@@ -3766,10 +3787,10 @@ void QGraphicsScene::helpEvent(QGraphicsSceneHelpEvent *helpEvent)
 
 bool QGraphicsScenePrivate::itemAcceptsHoverEvents_helper(const QGraphicsItem *item) const
 {
-    return (!item->isBlockedByModalPanel() &&
-            (item->acceptHoverEvents()
-             || (item->isWidget()
-                 && static_cast<const QGraphicsWidget *>(item)->d_func()->hasDecoration())));
+    return (item->d_ptr->acceptsHover
+            || (item->d_ptr->isWidget
+                && static_cast<const QGraphicsWidget *>(item)->d_func()->hasDecoration()))
+           && !item->isBlockedByModalPanel();
 }
 
 /*!
@@ -4882,17 +4903,7 @@ void QGraphicsScenePrivate::markDirty(QGraphicsItem *item, const QRectF &rect, b
     if (ignoreOpacity)
         item->d_ptr->ignoreOpacity = 1;
 
-    QGraphicsItem *p = item->d_ptr->parent;
-    while (p) {
-        p->d_ptr->dirtyChildren = 1;
-#ifndef QT_NO_GRAPHICSEFFECT
-        if (p->d_ptr->graphicsEffect && p->d_ptr->graphicsEffect->isEnabled()) {
-            p->d_ptr->dirty = 1;
-            p->d_ptr->fullUpdatePending = 1;
-        }
-#endif //QT_NO_GRAPHICSEFFECT
-        p = p->d_ptr->parent;
-    }
+    item->d_ptr->markParentDirty();
 }
 
 static inline bool updateHelper(QGraphicsViewPrivate *view, QGraphicsItemPrivate *item,
diff --git a/src/gui/graphicsview/qgraphicsscene_p.h b/src/gui/graphicsview/qgraphicsscene_p.h
index d10811c..54d8130 100644
--- a/src/gui/graphicsview/qgraphicsscene_p.h
+++ b/src/gui/graphicsview/qgraphicsscene_p.h
@@ -108,10 +108,9 @@ public:
     QPainterPath selectionArea;
     int selectionChanging;
     QSet<QGraphicsItem *> selectedItems;
-    QSet<QGraphicsItem *> unpolishedItems;
+    QVector<QGraphicsItem *> unpolishedItems;
     QList<QGraphicsItem *> topLevelItems;
     bool needSortTopLevelItems;
-    bool unpolishedItemsModified;
     bool holesInTopLevelSiblingIndex;
     bool topLevelSequentialOrdering;
 
diff --git a/src/gui/graphicsview/qgraphicsscenebsptreeindex.cpp b/src/gui/graphicsview/qgraphicsscenebsptreeindex.cpp
index 2e92b87..2a91348 100644
--- a/src/gui/graphicsview/qgraphicsscenebsptreeindex.cpp
+++ b/src/gui/graphicsview/qgraphicsscenebsptreeindex.cpp
@@ -635,16 +635,17 @@ void QGraphicsSceneBspTreeIndex::updateSceneRect(const QRectF &rect)
     This method react to the \a change of the \a item and use the \a value to
     update the BSP tree if necessary.
 */
-void QGraphicsSceneBspTreeIndex::itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange change, const QVariant &value)
+void QGraphicsSceneBspTreeIndex::itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange change, const void *const value)
 {
     Q_D(QGraphicsSceneBspTreeIndex);
     switch (change) {
     case QGraphicsItem::ItemFlagsChange: {
         // Handle ItemIgnoresTransformations
+        QGraphicsItem::GraphicsItemFlags newFlags = *static_cast<const QGraphicsItem::GraphicsItemFlags *>(value);
         bool ignoredTransform = item->d_ptr->flags & QGraphicsItem::ItemIgnoresTransformations;
-        bool willIgnoreTransform = value.toUInt() & QGraphicsItem::ItemIgnoresTransformations;
+        bool willIgnoreTransform = newFlags & QGraphicsItem::ItemIgnoresTransformations;
         bool clipsChildren = item->d_ptr->flags & QGraphicsItem::ItemClipsChildrenToShape;
-        bool willClipChildren = value.toUInt() & QGraphicsItem::ItemClipsChildrenToShape;
+        bool willClipChildren = newFlags & QGraphicsItem::ItemClipsChildrenToShape;
         if ((ignoredTransform != willIgnoreTransform) || (clipsChildren != willClipChildren)) {
             QGraphicsItem *thatItem = const_cast<QGraphicsItem *>(item);
             // Remove item and its descendants from the index and append
@@ -661,7 +662,7 @@ void QGraphicsSceneBspTreeIndex::itemChange(const QGraphicsItem *item, QGraphics
     case QGraphicsItem::ItemParentChange: {
         d->invalidateSortCache();
         // Handle ItemIgnoresTransformations
-        QGraphicsItem *newParent = qVariantValue<QGraphicsItem *>(value);
+        const QGraphicsItem *newParent = static_cast<const QGraphicsItem *>(value);
         bool ignoredTransform = item->d_ptr->itemIsUntransformable();
         bool willIgnoreTransform = (item->d_ptr->flags & QGraphicsItem::ItemIgnoresTransformations)
                                    || (newParent && newParent->d_ptr->itemIsUntransformable());
@@ -682,7 +683,6 @@ void QGraphicsSceneBspTreeIndex::itemChange(const QGraphicsItem *item, QGraphics
     default:
         break;
     }
-    return QGraphicsSceneIndex::itemChange(item, change, value);
 }
 /*!
     \reimp
diff --git a/src/gui/graphicsview/qgraphicsscenebsptreeindex_p.h b/src/gui/graphicsview/qgraphicsscenebsptreeindex_p.h
index 119571b..f671fd9 100644
--- a/src/gui/graphicsview/qgraphicsscenebsptreeindex_p.h
+++ b/src/gui/graphicsview/qgraphicsscenebsptreeindex_p.h
@@ -97,7 +97,7 @@ protected:
     void removeItem(QGraphicsItem *item);
     void prepareBoundingRectChange(const QGraphicsItem *item);
 
-    void itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange change, const QVariant &value);
+    void itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange change, const void *const value);
 
 private :
     Q_DECLARE_PRIVATE(QGraphicsSceneBspTreeIndex)
diff --git a/src/gui/graphicsview/qgraphicssceneindex.cpp b/src/gui/graphicsview/qgraphicssceneindex.cpp
index bc8a7dc..043c4eb 100644
--- a/src/gui/graphicsview/qgraphicssceneindex.cpp
+++ b/src/gui/graphicsview/qgraphicssceneindex.cpp
@@ -624,7 +624,7 @@ void QGraphicsSceneIndex::deleteItem(QGraphicsItem *item)
 
     \sa QGraphicsItem::GraphicsItemChange
 */
-void QGraphicsSceneIndex::itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange change, const QVariant &value)
+void QGraphicsSceneIndex::itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange change, const void *const value)
 {
     Q_UNUSED(item);
     Q_UNUSED(change);
diff --git a/src/gui/graphicsview/qgraphicssceneindex_p.h b/src/gui/graphicsview/qgraphicssceneindex_p.h
index def58f0..597a229 100644
--- a/src/gui/graphicsview/qgraphicssceneindex_p.h
+++ b/src/gui/graphicsview/qgraphicssceneindex_p.h
@@ -110,7 +110,7 @@ protected:
     virtual void removeItem(QGraphicsItem *item) = 0;
     virtual void deleteItem(QGraphicsItem *item);
 
-    virtual void itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange, const QVariant &value);
+    virtual void itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange, const void *const value);
     virtual void prepareBoundingRectChange(const QGraphicsItem *item);
 
     QGraphicsSceneIndex(QGraphicsSceneIndexPrivate &dd, QGraphicsScene *scene);
diff --git a/src/gui/image/qbmphandler.cpp b/src/gui/image/qbmphandler.cpp
index 854be2e..42e19b8 100644
--- a/src/gui/image/qbmphandler.cpp
+++ b/src/gui/image/qbmphandler.cpp
@@ -144,7 +144,7 @@ static QDataStream &operator<<(QDataStream &s, const BMP_INFOHDR &bi)
 static int calc_shift(int mask)
 {
     int result = 0;
-    while (!(mask & 1)) {
+    while (mask && !(mask & 1)) {
         result++;
         mask >>= 1;
     }
diff --git a/src/gui/itemviews/qtableview.cpp b/src/gui/itemviews/qtableview.cpp
index 7eefb0b..3111896 100644
--- a/src/gui/itemviews/qtableview.cpp
+++ b/src/gui/itemviews/qtableview.cpp
@@ -114,7 +114,9 @@ void QSpanCollection::updateSpan(QSpanCollection::Span *span, int old_height)
         }
     } else if (old_height > span->height()) {
         //remove the span from all the subspans lists that intersect the columns not covered anymore
-        Index::iterator it_y = index.lowerBound(qMin(-span->bottom(), 0));
+        Index::iterator it_y = index.lowerBound(-span->bottom());
+        if (it_y == index.end())
+            it_y = index.find(-span->top());    // This is the only span remaining and we are deleting it.
         Q_ASSERT(it_y != index.end()); //it_y must exist since the span is in the list
         while (-it_y.key() <= span->top() + old_height -1) {
             if (-it_y.key() > span->bottom()) {
diff --git a/src/gui/kernel/qapplication_mac.mm b/src/gui/kernel/qapplication_mac.mm
index 847c58d..e8b821af 100644
--- a/src/gui/kernel/qapplication_mac.mm
+++ b/src/gui/kernel/qapplication_mac.mm
@@ -227,12 +227,29 @@ void onApplicationChangedActivation( bool activated );
 
 static void qt_mac_read_fontsmoothing_settings()
 {
-#ifdef QT_MAC_USE_COCOA
-    QMacCocoaAutoReleasePool pool2;
-#endif
-    
-    NSInteger appleFontSmoothing = [[NSUserDefaults standardUserDefaults] integerForKey:@"AppleFontSmoothing"];
-    qt_applefontsmoothing_enabled = (appleFontSmoothing > 0);
+    qt_applefontsmoothing_enabled = true;
+    int w = 10, h = 10;
+    QImage image(w, h, QImage::Format_RGB32);
+    image.fill(0xffffffff);
+    QPainter p(&image);
+    p.drawText(0, h, "X\\");
+    p.end();
+
+    const int *bits = (const int *) ((const QImage &) image).bits();
+    int bpl = image.bytesPerLine() / 4;
+    for (int y=0; y<w; ++y) {
+        for (int x=0; x<h; ++x) {
+            int r = qRed(bits[x]);
+            int g = qGreen(bits[x]);
+            int b = qBlue(bits[x]);
+            if (r != g || r != b) {
+                qt_applefontsmoothing_enabled = true;
+                return;
+            }
+        }
+        bits += bpl;
+    }
+    qt_applefontsmoothing_enabled = false;
 }
 
 Q_GUI_EXPORT bool qt_mac_execute_apple_script(const char *script, long script_len, AEDesc *ret) {
@@ -776,11 +793,11 @@ static void qt_mac_update_intersected_gl_widgets(QWidget *widget)
             qt_post_window_change_event(glWidget);
             it->lastUpdateWidget = widget;
         } else if (it->lastUpdateWidget == widget) {
-            // Update the gl wigets that the widget intersected the last time around, 
-            // and that we are not intersecting now. This prevents paint errors when the 
+            // Update the gl wigets that the widget intersected the last time around,
+            // and that we are not intersecting now. This prevents paint errors when the
             // intersecting widget leaves a gl widget.
             qt_post_window_change_event(glWidget);
-            it->lastUpdateWidget = 0;            
+            it->lastUpdateWidget = 0;
         }
     }
 #else
@@ -812,8 +829,8 @@ Q_GUI_EXPORT void qt_event_request_window_change(QWidget *widget)
     // Post a kEventQtRequestWindowChange event. This event is semi-public,
     // don't remove this line!
     qt_event_request_window_change();
-    
-    // Post update request on gl widgets unconditionally. 
+
+    // Post update request on gl widgets unconditionally.
     if (qt_widget_private(widget)->isGLWidget == true) {
         qt_post_window_change_event(widget);
         return;
@@ -1218,8 +1235,6 @@ void qt_init(QApplicationPrivate *priv, int)
     if (QApplication::desktopSettingsAware())
         QApplicationPrivate::qt_mac_apply_settings();
 
-    qt_mac_read_fontsmoothing_settings();
-
     // Cocoa application delegate
 #ifdef QT_MAC_USE_COCOA
     NSApplication *cocoaApp = [NSApplication sharedApplication];
@@ -1257,6 +1272,7 @@ void qt_init(QApplicationPrivate *priv, int)
     }
    priv->native_modal_dialog_active = false;
 
+   qt_mac_read_fontsmoothing_settings();
 }
 
 void qt_release_apple_event_handler()
@@ -1709,7 +1725,7 @@ QApplicationPrivate::globalEventProcessor(EventHandlerCallRef er, EventRef event
             // kEventMouseWheelMoved events if we dont eat this event
             // (actually two events; one for horizontal and one for vertical).
             // As a results of this, and to make sure we dont't receive duplicate events,
-            // we try to detect when this happend by checking the 'compatibilityEvent'. 
+            // we try to detect when this happend by checking the 'compatibilityEvent'.
             SInt32 mdelt = 0;
             GetEventParameter(event, kEventParamMouseWheelSmoothHorizontalDelta, typeSInt32, 0,
                               sizeof(mdelt), 0, &mdelt);
@@ -2580,7 +2596,7 @@ void QApplicationPrivate::closePopup(QWidget *popup)
     if (QApplicationPrivate::popupWidgets->isEmpty()) {  // this was the last popup
         delete QApplicationPrivate::popupWidgets;
         QApplicationPrivate::popupWidgets = 0;
-        
+
         // Special case for Tool windows: since they are activated and deactived together
         // with a normal window they never become the QApplicationPrivate::active_window.
         QWidget *appFocusWidget = QApplication::focusWidget();
diff --git a/src/gui/kernel/qcocoamenuloader_mac.mm b/src/gui/kernel/qcocoamenuloader_mac.mm
index 9f90cec..18b3772 100644
--- a/src/gui/kernel/qcocoamenuloader_mac.mm
+++ b/src/gui/kernel/qcocoamenuloader_mac.mm
@@ -110,6 +110,12 @@ QT_USE_NAMESPACE
     }
 }
 
+- (void)removeActionsFromAppMenu
+{
+    for (NSMenuItem *item in [appMenu itemArray])
+        [item setTag:nil];
+}
+
 - (void)dealloc
 {
     [lastAppSpecificItem release];
diff --git a/src/gui/kernel/qcocoamenuloader_mac_p.h b/src/gui/kernel/qcocoamenuloader_mac_p.h
index 432a7a6..81c136e 100644
--- a/src/gui/kernel/qcocoamenuloader_mac_p.h
+++ b/src/gui/kernel/qcocoamenuloader_mac_p.h
@@ -70,6 +70,7 @@
 
 }
 - (void)ensureAppMenuInMenu:(NSMenu *)menu;
+- (void)removeActionsFromAppMenu;
 - (NSMenu *)applicationMenu;
 - (NSMenu *)menu;
 - (NSMenuItem *)quitMenuItem;
diff --git a/src/gui/kernel/qwidget_mac.mm b/src/gui/kernel/qwidget_mac.mm
index 3dbc843..ebfab21 100644
--- a/src/gui/kernel/qwidget_mac.mm
+++ b/src/gui/kernel/qwidget_mac.mm
@@ -404,7 +404,7 @@ inline static void qt_mac_set_fullscreen_mode(bool b)
         return;
     qt_mac_app_fullscreen = b;
     if (b) {
-        SetSystemUIMode(kUIModeAllSuppressed, 0);
+        SetSystemUIMode(kUIModeAllHidden, kUIOptionAutoShowMenuBar);
     } else {
         SetSystemUIMode(kUIModeNormal, 0);
     }
diff --git a/src/gui/painting/qcolor.cpp b/src/gui/painting/qcolor.cpp
index f51dc36..d6d288e 100644
--- a/src/gui/painting/qcolor.cpp
+++ b/src/gui/painting/qcolor.cpp
@@ -934,8 +934,7 @@ void QColor::setRgb(int r, int g, int b, int a)
 /*!
     \fn QRgb QColor::rgba() const
 
-    Returns the RGB value of the color. Unlike rgb(), the alpha is not
-    stripped.
+    Returns the RGB value of the color, including its alpha.
 
     For an invalid color, the alpha value of the returned color is unspecified.
 
@@ -950,8 +949,7 @@ QRgb QColor::rgba() const
 }
 
 /*!
-    Sets the RGBA value to \a rgba. Unlike setRgb(QRgb rgb), this function does
-    not ignore the alpha.
+    Sets the RGB value to \a rgba, including its alpha.
 
     \sa rgba(), rgb()
 */
@@ -968,8 +966,7 @@ void QColor::setRgba(QRgb rgba)
 /*!
     \fn QRgb QColor::rgb() const
 
-    Returns the RGB value of the color. The alpha is stripped for
-    compatibility.
+    Returns the RGB value of the color. The alpha value is opaque.
 
     \sa getRgb(), rgba()
 */
@@ -983,7 +980,7 @@ QRgb QColor::rgb() const
 /*!
     \overload
 
-    Sets the RGB value to \a rgb, ignoring the alpha.
+    Sets the RGB value to \a rgb. The alpha value is set to opaque.
 */
 void QColor::setRgb(QRgb rgb)
 {
diff --git a/src/gui/painting/qpaintengine_raster_p.h b/src/gui/painting/qpaintengine_raster_p.h
index b937f66..a1c73cc 100644
--- a/src/gui/painting/qpaintengine_raster_p.h
+++ b/src/gui/painting/qpaintengine_raster_p.h
@@ -264,13 +264,13 @@ private:
 #endif // Q_OS_SYMBIAN && QT_NO_FREETYPE
 
     inline void ensureBrush(const QBrush &brush) {
-        if (!qbrush_fast_equals(state()->lastBrush, brush) || state()->fillFlags)
+        if (!qbrush_fast_equals(state()->lastBrush, brush) || (brush.style() != Qt::NoBrush && state()->fillFlags))
             updateBrush(brush);
     }
     inline void ensureBrush() { ensureBrush(state()->brush); }
 
     inline void ensurePen(const QPen &pen) {
-        if (!qpen_fast_equals(state()->lastPen, pen) || state()->strokeFlags)
+        if (!qpen_fast_equals(state()->lastPen, pen) || (pen.style() != Qt::NoPen && state()->strokeFlags))
             updatePen(pen);
     }
     inline void ensurePen() { ensurePen(state()->pen); }
diff --git a/src/gui/painting/qpainter.cpp b/src/gui/painting/qpainter.cpp
index 31132d9..cde6a2d 100644
--- a/src/gui/painting/qpainter.cpp
+++ b/src/gui/painting/qpainter.cpp
@@ -7382,10 +7382,15 @@ struct QPaintDeviceRedirection
 typedef QList<QPaintDeviceRedirection> QPaintDeviceRedirectionList;
 Q_GLOBAL_STATIC(QPaintDeviceRedirectionList, globalRedirections)
 Q_GLOBAL_STATIC(QMutex, globalRedirectionsMutex)
+Q_GLOBAL_STATIC(QAtomicInt, globalRedirectionAtomic)
 
 /*!
     \threadsafe
 
+    \obsolete
+
+    Please use QWidget::render() instead.
+
     Redirects all paint commands for the given paint \a device, to the
     \a replacement device. The optional point \a offset defines an
     offset within the source device.
@@ -7395,9 +7400,10 @@ Q_GLOBAL_STATIC(QMutex, globalRedirectionsMutex)
     device's painter (if any) before redirecting. Call
     restoreRedirected() to restore the previous redirection.
 
-    In general, you'll probably find that calling
-    QPixmap::grabWidget() or QPixmap::grabWindow() is an easier
-    solution.
+    \warning Making use of redirections in the QPainter API implies
+    that QPainter::begin() and QPaintDevice destructors need to hold
+    a mutex for a short period. This can impact performance. Use of
+    QWidget::render is strongly encouraged.
 
     \sa redirected(), restoreRedirected()
 */
@@ -7429,14 +7435,24 @@ void QPainter::setRedirected(const QPaintDevice *device,
     Q_ASSERT(redirections != 0);
     *redirections += QPaintDeviceRedirection(device, rdev ? rdev : replacement, offset + roffset,
                                              hadInternalWidgetRedirection ? redirections->size() - 1 : -1);
+    globalRedirectionAtomic()->ref();
 }
 
 /*!
     \threadsafe
 
+    \obsolete
+
+    Using QWidget::render() obsoletes the use of this function.
+
     Restores the previous redirection for the given \a device after a
     call to setRedirected().
 
+    \warning Making use of redirections in the QPainter API implies
+    that QPainter::begin() and QPaintDevice destructors need to hold
+    a mutex for a short period. This can impact performance. Use of
+    QWidget::render is strongly encouraged.
+
     \sa redirected()
  */
 void QPainter::restoreRedirected(const QPaintDevice *device)
@@ -7447,6 +7463,7 @@ void QPainter::restoreRedirected(const QPaintDevice *device)
     Q_ASSERT(redirections != 0);
     for (int i = redirections->size()-1; i >= 0; --i) {
         if (redirections->at(i) == device) {
+            globalRedirectionAtomic()->deref();
             const int internalWidgetRedirectionIndex = redirections->at(i).internalWidgetRedirectionIndex;
             redirections->removeAt(i);
             // Restore the internal widget redirection, i.e. remove it from the global
@@ -7468,9 +7485,18 @@ void QPainter::restoreRedirected(const QPaintDevice *device)
 /*!
     \threadsafe
 
+    \obsolete
+
+    Using QWidget::render() obsoletes the use of this function.
+
     Returns the replacement for given \a device. The optional out
     parameter \a offset returns the offset within the replaced device.
 
+    \warning Making use of redirections in the QPainter API implies
+    that QPainter::begin() and QPaintDevice destructors need to hold
+    a mutex for a short period. This can impact performance. Use of
+    QWidget::render is strongly encouraged.
+
     \sa setRedirected(), restoreRedirected()
 */
 QPaintDevice *QPainter::redirected(const QPaintDevice *device, QPoint *offset)
@@ -7483,6 +7509,9 @@ QPaintDevice *QPainter::redirected(const QPaintDevice *device, QPoint *offset)
             return widgetPrivate->redirected(offset);
     }
 
+    if (*globalRedirectionAtomic() == 0)
+        return 0;
+
     QMutexLocker locker(globalRedirectionsMutex());
     QPaintDeviceRedirectionList *redirections = globalRedirections();
     Q_ASSERT(redirections != 0);
@@ -7500,6 +7529,9 @@ QPaintDevice *QPainter::redirected(const QPaintDevice *device, QPoint *offset)
 
 void qt_painter_removePaintDevice(QPaintDevice *dev)
 {
+    if (*globalRedirectionAtomic() == 0)
+        return;
+
     QMutex *mutex = 0;
     QT_TRY {
         mutex = globalRedirectionsMutex();
diff --git a/src/gui/widgets/qlinecontrol.cpp b/src/gui/widgets/qlinecontrol.cpp
index 414c2ed..b0a64ea 100644
--- a/src/gui/widgets/qlinecontrol.cpp
+++ b/src/gui/widgets/qlinecontrol.cpp
@@ -524,8 +524,11 @@ void QLineControl::draw(QPainter *painter, const QPoint &offset, const QRect &cl
         m_textLayout.draw(painter, offset, selections, clip);
 
     if (flags & DrawCursor){
+        int cursor = m_cursor;
+        if (m_preeditCursor != -1)
+            cursor += m_preeditCursor;
         if(!m_blinkPeriod || m_blinkStatus)
-            m_textLayout.drawCursor(painter, offset, m_cursor, m_cursorWidth);
+            m_textLayout.drawCursor(painter, offset, cursor, m_cursorWidth);
     }
 }
 
diff --git a/src/gui/widgets/qlinecontrol_p.h b/src/gui/widgets/qlinecontrol_p.h
index 301ff72..d6f2705 100644
--- a/src/gui/widgets/qlinecontrol_p.h
+++ b/src/gui/widgets/qlinecontrol_p.h
@@ -549,7 +549,10 @@ inline qreal QLineControl::cursorToX(int cursor) const
 
 inline qreal QLineControl::cursorToX() const
 {
-    return cursorToX(m_cursor);
+    int cursor = m_cursor;
+    if (m_preeditCursor != -1)
+        cursor += m_preeditCursor;
+    return cursorToX(cursor);
 }
 
 inline bool QLineControl::isReadOnly() const
diff --git a/src/gui/widgets/qmenu_mac.mm b/src/gui/widgets/qmenu_mac.mm
index cd7f9bd..7e4bbb5 100644
--- a/src/gui/widgets/qmenu_mac.mm
+++ b/src/gui/widgets/qmenu_mac.mm
@@ -175,6 +175,22 @@ static quint32 constructModifierMask(quint32 accel_key)
     return ret;
 }
 
+static void cancelAllMenuTracking()
+{
+#ifdef QT_MAC_USE_COCOA
+    QMacCocoaAutoReleasePool pool;
+    NSMenu *mainMenu = [NSApp mainMenu];
+    [mainMenu cancelTracking];
+    for (NSMenuItem *item in [mainMenu itemArray]) {
+        if ([item submenu]) {
+            [[item submenu] cancelTracking];
+        }
+    }
+#else
+    CancelMenuTracking(AcquireRootMenu(), true, 0);
+#endif
+}
+
 static bool actualMenuItemVisibility(const QMenuBarPrivate::QMacMenuBarPrivate *mbp,
                                      const QMacMenuAction *action)
 {
@@ -1830,6 +1846,12 @@ void QMenuBarPrivate::macDestroyMenuBar()
     mac_menubar = 0;
 
     if (qt_mac_current_menubar.qmenubar == q) {
+#ifdef QT_MAC_USE_COCOA
+        QT_MANGLE_NAMESPACE(QCocoaMenuLoader) *loader = getMenuLoader();
+        [loader removeActionsFromAppMenu];
+#else
+        cancelAllMenuTracking();
+#endif
         extern void qt_event_request_menubarupdate(); //qapplication_mac.cpp
         qt_event_request_menubarupdate();
     }
@@ -1933,20 +1955,6 @@ static bool qt_mac_should_disable_menu(QMenuBar *menuBar, QWidget *modalWidget)
     return qt_mac_is_ancestor(menuBar->parentWidget(), modalWidget);
 }
 
-static void cancelAllMenuTracking()
-{
-#ifdef QT_MAC_USE_COCOA
-    QMacCocoaAutoReleasePool pool;
-    NSMenu *mainMenu = [NSApp mainMenu];
-    [mainMenu cancelTracking];
-    for (NSMenuItem *item in [mainMenu itemArray]) {
-        if ([item submenu]) {
-            [[item submenu] cancelTracking];
-        }
-    }
-#endif
-}
-
 /*!
   \internal