Long live Qt 4.5!

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diff --git a/src/gui/graphicsview/qgraphicsscene_p.h b/src/gui/graphicsview/qgraphicsscene_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QGRAPHICSSCENE_P_H
+#define QGRAPHICSSCENE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of qapplication_*.cpp, qwidget*.cpp and qfiledialog.cpp.  This header
+// file may change from version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qgraphicsscene.h"
+
+#if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW
+
+#include "qgraphicsscene_bsp_p.h"
+#include "qgraphicsitem_p.h"
+
+#include <private/qobject_p.h>
+#include <QtCore/qbitarray.h>
+#include <QtCore/qlist.h>
+#include <QtCore/qmap.h>
+#include <QtCore/qset.h>
+#include <QtGui/qfont.h>
+#include <QtGui/qpalette.h>
+#include <QtGui/qstyle.h>
+
+QT_BEGIN_NAMESPACE
+
+class QGraphicsView;
+class QGraphicsWidget;
+
+class QGraphicsScenePrivate : public QObjectPrivate
+{
+    Q_DECLARE_PUBLIC(QGraphicsScene)
+public:
+    QGraphicsScenePrivate();
+    void init();
+
+    quint32 changedSignalMask;
+
+    QGraphicsScene::ItemIndexMethod indexMethod;
+    int bspTreeDepth;
+
+    QList<QGraphicsItem *> estimateItemsInRect(const QRectF &rect) const;
+    void addToIndex(QGraphicsItem *item);
+    void removeFromIndex(QGraphicsItem *item);
+    void resetIndex();
+
+    QGraphicsSceneBspTree bspTree;
+    void _q_updateIndex();
+    int lastItemCount;
+
+    QRectF sceneRect;
+    bool hasSceneRect;
+    QRectF growingItemsBoundingRect;
+    QRectF largestUntransformableItem;
+
+    void _q_emitUpdated();
+    QList<QRectF> updatedRects;
+    bool updateAll;
+    bool calledEmitUpdated;
+
+    QPainterPath selectionArea;
+    int selectionChanging;
+    QSet<QGraphicsItem *> selectedItems;
+    QList<QGraphicsItem *> unindexedItems;
+    QList<QGraphicsItem *> indexedItems;
+    QList<QGraphicsItem *> dirtyItems;
+    QList<QGraphicsItem *> pendingUpdateItems;
+    QList<QGraphicsItem *> unpolishedItems;
+    QMap<QGraphicsItem *, QPointF> movingItemsInitialPositions;
+    void _q_updateLater();
+    void _q_polishItems();
+
+    void _q_resetDirtyItems();
+    void resetDirtyItemsLater();
+    bool dirtyItemResetPending;
+
+    QList<int> freeItemIndexes;
+    bool regenerateIndex;
+
+    bool purgePending;
+    void _q_removeItemLater(QGraphicsItem *item);
+    QSet<QGraphicsItem *> removedItems;
+    void purgeRemovedItems();
+
+    QBrush backgroundBrush;
+    QBrush foregroundBrush;
+
+    int indexTimerId;
+    bool restartIndexTimer;
+    void startIndexTimer();
+
+    bool stickyFocus;
+    bool hasFocus;
+    QGraphicsItem *focusItem;
+    QGraphicsItem *lastFocusItem;
+    QGraphicsWidget *tabFocusFirst;
+    QGraphicsWidget *activeWindow;
+    int activationRefCount;
+
+    QList<QGraphicsWidget *> popupWidgets;
+    void addPopup(QGraphicsWidget *widget);
+    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);
+    void clearMouseGrabber();
+
+    QList<QGraphicsItem *> keyboardGrabberItems;
+    void grabKeyboard(QGraphicsItem *item);
+    void ungrabKeyboard(QGraphicsItem *item, bool itemIsDying = false);
+    void clearKeyboardGrabber();
+    
+    QGraphicsItem *dragDropItem;
+    QGraphicsWidget *enterWidget;
+    Qt::DropAction lastDropAction;
+    QList<QGraphicsItem *> cachedItemsUnderMouse;
+    QList<QGraphicsItem *> hoverItems;
+    QMap<Qt::MouseButton, QPointF> mouseGrabberButtonDownPos;
+    QMap<Qt::MouseButton, QPointF> mouseGrabberButtonDownScenePos;
+    QMap<Qt::MouseButton, QPoint> mouseGrabberButtonDownScreenPos;
+    QList<QGraphicsItem *> itemsAtPosition(const QPoint &screenPos,
+                                           const QPointF &scenePos,
+                                           QWidget *widget) const;
+    static bool itemCollidesWithPath(QGraphicsItem *item, const QPainterPath &path, Qt::ItemSelectionMode mode);
+    void storeMouseButtonsForMouseGrabber(QGraphicsSceneMouseEvent *event);
+
+    QList<QGraphicsView *> views;
+    bool painterStateProtection;
+
+    QMultiMap<QGraphicsItem *, QGraphicsItem *> sceneEventFilters;
+    void installSceneEventFilter(QGraphicsItem *watched, QGraphicsItem *filter);
+    void removeSceneEventFilter(QGraphicsItem *watched, QGraphicsItem *filter);
+    bool filterEvent(QGraphicsItem *item, QEvent *event);
+    bool sendEvent(QGraphicsItem *item, QEvent *event);
+
+    bool dispatchHoverEvent(QGraphicsSceneHoverEvent *hoverEvent);
+    bool itemAcceptsHoverEvents_helper(const QGraphicsItem *item) const;
+    void leaveScene();
+
+    void cloneDragDropEvent(QGraphicsSceneDragDropEvent *dest,
+                           QGraphicsSceneDragDropEvent *source);
+    void sendDragDropEvent(QGraphicsItem *item,
+                           QGraphicsSceneDragDropEvent *dragDropEvent);
+    void sendHoverEvent(QEvent::Type type, QGraphicsItem *item,
+                        QGraphicsSceneHoverEvent *hoverEvent);
+    void sendMouseEvent(QGraphicsSceneMouseEvent *mouseEvent);
+    void mousePressEventHandler(QGraphicsSceneMouseEvent *mouseEvent);
+    QGraphicsWidget *windowForItem(const QGraphicsItem *item) const;
+
+    QList<QGraphicsItem *> items_helper(const QRectF &rect,
+                                        Qt::ItemSelectionMode mode,
+                                        Qt::SortOrder order) const;
+    QList<QGraphicsItem *> items_helper(const QPolygonF &rect,
+                                        Qt::ItemSelectionMode mode,
+                                        Qt::SortOrder order) const;
+    QList<QGraphicsItem *> items_helper(const QPainterPath &rect,
+                                        Qt::ItemSelectionMode mode,
+                                        Qt::SortOrder order) const;
+    void childItems_helper(QList<QGraphicsItem *> *items,
+                           const QGraphicsItem *parent,
+                           const QRectF &rect,
+                           Qt::ItemSelectionMode mode) const;
+    void childItems_helper(QList<QGraphicsItem *> *items,
+                           const QGraphicsItem *parent,
+                           const QPolygonF &polygon,
+                           Qt::ItemSelectionMode mode) const;
+    void childItems_helper(QList<QGraphicsItem *> *items,
+                           const QGraphicsItem *parent,
+                           const QPainterPath &path,
+                           Qt::ItemSelectionMode mode) const;
+
+    bool sortCacheEnabled;
+    bool updatingSortCache;
+    void invalidateSortCache();
+    static void climbTree(QGraphicsItem *item, int *stackingOrder);
+    void _q_updateSortCache();
+
+    static bool closestItemFirst_withoutCache(const QGraphicsItem *item1, const QGraphicsItem *item2);
+    static bool closestItemLast_withoutCache(const QGraphicsItem *item1, const QGraphicsItem *item2);
+
+    static inline bool closestItemFirst_withCache(const QGraphicsItem *item1, const QGraphicsItem *item2)
+    { 
+        return item1->d_ptr->globalStackingOrder < item2->d_ptr->globalStackingOrder;
+    }
+    static inline bool closestItemLast_withCache(const QGraphicsItem *item1, const QGraphicsItem *item2)
+    {
+        return item1->d_ptr->globalStackingOrder >= item2->d_ptr->globalStackingOrder;
+    }
+
+    static void sortItems(QList<QGraphicsItem *> *itemList, Qt::SortOrder order, bool cached);
+
+    void drawItemHelper(QGraphicsItem *item, QPainter *painter,
+                        const QStyleOptionGraphicsItem *option, QWidget *widget,
+                        bool painterStateProtection);
+    
+    QStyle *style;
+    QFont font;
+    void setFont_helper(const QFont &font);
+    void resolveFont();
+    void updateFont(const QFont &font);
+    QPalette palette;
+    void setPalette_helper(const QPalette &palette);
+    void resolvePalette();
+    void updatePalette(const QPalette &palette);
+
+    mutable QVector<QTransform> sceneTransformCache;
+    mutable QBitArray validTransforms;
+    mutable QVector<int> freeSceneTransformSlots;
+};
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_GRAPHICSVIEW
+
+#endif