Long live Qt 4.5!

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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 QGRAPHICSVIEW_P_H
+#define QGRAPHICSVIEW_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 "qgraphicsview.h"
+
+#if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW
+
+#include <QtGui/qevent.h>
+#include "qgraphicssceneevent.h"
+#include <private/qabstractscrollarea_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class Q_GUI_EXPORT QGraphicsViewPrivate : public QAbstractScrollAreaPrivate
+{
+    Q_DECLARE_PUBLIC(QGraphicsView)
+public:
+    QGraphicsViewPrivate();
+
+    void recalculateContentSize();
+    void centerView(QGraphicsView::ViewportAnchor anchor);
+
+    QPainter::RenderHints renderHints;
+
+    QGraphicsView::DragMode dragMode;
+    bool sceneInteractionAllowed;
+    QRectF sceneRect;
+    bool hasSceneRect;
+    void updateLastCenterPoint();
+    bool connectedToScene;
+
+    qint64 horizontalScroll() const;
+    qint64 verticalScroll() const;
+
+    QList<QGraphicsItem *> itemsInArea(const QPainterPath &path,
+                                       Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
+
+    QPointF mousePressItemPoint;
+    QPointF mousePressScenePoint;
+    QPoint mousePressViewPoint;
+    QPoint mousePressScreenPoint;
+    QPointF lastMouseMoveScenePoint;
+    QPoint lastMouseMoveScreenPoint;
+    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;
+    QGraphicsView::ViewportUpdateMode viewportUpdateMode;
+    QGraphicsView::OptimizationFlags optimizationFlags;
+
+    QPointer<QGraphicsScene> scene;
+#ifndef QT_NO_RUBBERBAND
+    QRect rubberBandRect;
+    QRegion rubberBandRegion(const QWidget *widget, const QRect &rect) const;
+    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
+    QCursor originalCursor;
+    bool hasStoredOriginalCursor;
+    void _q_setViewportCursor(const QCursor &cursor);
+    void _q_unsetViewportCursor();
+#endif
+
+    QGraphicsSceneDragDropEvent *lastDragDropEvent;
+    void storeDragDropEvent(const QGraphicsSceneDragDropEvent *event);
+    void populateSceneDragDropEvent(QGraphicsSceneDragDropEvent *dest,
+                                    QDropEvent *source);
+
+    QRect mapToViewRect(const QGraphicsItem *item, const QRectF &rect) const;
+    QRegion mapToViewRegion(const QGraphicsItem *item, const QRectF &rect) const;
+    void itemUpdated(QGraphicsItem *item, const QRectF &rect);
+    bool fullUpdatePending;
+    QList<QRect> dirtyRects;
+    QList<QRegion> dirtyRegions;
+    int dirtyRectCount;
+    QRect dirtyBoundingRect;
+    void updateLater();
+    bool updatingLater;
+    void _q_updateLaterSlot();
+    void updateAll();
+    void updateRect(const QRect &rect);
+    void updateRegion(const QRegion &region);
+    bool updateSceneSlotReimplementedChecked;
+
+    QList<QGraphicsItem *> findItems(const QRegion &exposedRegion,
+				     const QTransform &worldTransform,
+                                     bool *allItems) const;
+
+    void generateStyleOptions(const QList<QGraphicsItem *> &itemList,
+			      QGraphicsItem **itemArray,
+			      QStyleOptionGraphicsItem *styleOptionArray,
+			      const QTransform &worldTransform,
+			      bool allItems,
+			      const QRegion &exposedRegion) const;
+};
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_GRAPHICSVIEW
+
+#endif