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_H
+#define QGRAPHICSVIEW_H
+
+#include <QtCore/qmetatype.h>
+#include <QtGui/qpainter.h>
+#include <QtGui/qscrollarea.h>
+#include <QtGui/qgraphicsscene.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Gui)
+
+#if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW
+
+class QGraphicsItem;
+class QPainterPath;
+class QPolygonF;
+class QStyleOptionGraphicsItem;
+
+class QGraphicsViewPrivate;
+class Q_GUI_EXPORT QGraphicsView : public QAbstractScrollArea
+{
+    Q_OBJECT
+    Q_FLAGS(QPainter::RenderHints CacheMode OptimizationFlags)
+    Q_ENUMS(ViewportAnchor DragMode ViewportUpdateMode)
+    Q_PROPERTY(QBrush backgroundBrush READ backgroundBrush WRITE setBackgroundBrush)
+    Q_PROPERTY(QBrush foregroundBrush READ foregroundBrush WRITE setForegroundBrush)
+    Q_PROPERTY(bool interactive READ isInteractive WRITE setInteractive)
+    Q_PROPERTY(QRectF sceneRect READ sceneRect WRITE setSceneRect)
+    Q_PROPERTY(Qt::Alignment alignment READ alignment WRITE setAlignment)
+    Q_PROPERTY(QPainter::RenderHints renderHints READ renderHints WRITE setRenderHints)
+    Q_PROPERTY(DragMode dragMode READ dragMode WRITE setDragMode)
+    Q_PROPERTY(CacheMode cacheMode READ cacheMode WRITE setCacheMode)
+    Q_PROPERTY(ViewportAnchor transformationAnchor READ transformationAnchor WRITE setTransformationAnchor)
+    Q_PROPERTY(ViewportAnchor resizeAnchor READ resizeAnchor WRITE setResizeAnchor)
+    Q_PROPERTY(ViewportUpdateMode viewportUpdateMode READ viewportUpdateMode WRITE setViewportUpdateMode)
+#ifndef QT_NO_RUBBERBAND
+    Q_PROPERTY(Qt::ItemSelectionMode rubberBandSelectionMode READ rubberBandSelectionMode WRITE setRubberBandSelectionMode)
+#endif
+    Q_PROPERTY(OptimizationFlags optimizationFlags READ optimizationFlags WRITE setOptimizationFlags)
+
+public:
+    enum ViewportAnchor {
+        NoAnchor,
+        AnchorViewCenter,
+        AnchorUnderMouse
+    };
+
+    enum CacheModeFlag {
+        CacheNone = 0x0,
+        CacheBackground = 0x1
+    };
+    Q_DECLARE_FLAGS(CacheMode, CacheModeFlag)
+
+    enum DragMode {
+        NoDrag,
+        ScrollHandDrag,
+        RubberBandDrag
+    };
+
+    enum ViewportUpdateMode {
+        FullViewportUpdate,
+        MinimalViewportUpdate,
+        SmartViewportUpdate,
+        NoViewportUpdate,
+        BoundingRectViewportUpdate
+    };
+
+    enum OptimizationFlag {
+        DontClipPainter = 0x1,
+        DontSavePainterState = 0x2,
+        DontAdjustForAntialiasing = 0x4
+    };
+    Q_DECLARE_FLAGS(OptimizationFlags, OptimizationFlag)
+
+    QGraphicsView(QWidget *parent = 0);
+    QGraphicsView(QGraphicsScene *scene, QWidget *parent = 0);
+    ~QGraphicsView();
+
+    QSize sizeHint() const;
+
+    QPainter::RenderHints renderHints() const;
+    void setRenderHint(QPainter::RenderHint hint, bool enabled = true);
+    void setRenderHints(QPainter::RenderHints hints);
+
+    Qt::Alignment alignment() const;
+    void setAlignment(Qt::Alignment alignment);
+
+    ViewportAnchor transformationAnchor() const;
+    void setTransformationAnchor(ViewportAnchor anchor);
+
+    ViewportAnchor resizeAnchor() const;
+    void setResizeAnchor(ViewportAnchor anchor);
+
+    ViewportUpdateMode viewportUpdateMode() const;
+    void setViewportUpdateMode(ViewportUpdateMode mode);
+
+    OptimizationFlags optimizationFlags() const;
+    void setOptimizationFlag(OptimizationFlag flag, bool enabled = true);
+    void setOptimizationFlags(OptimizationFlags flags);
+
+    DragMode dragMode() const;
+    void setDragMode(DragMode mode);
+
+#ifndef QT_NO_RUBBERBAND
+    Qt::ItemSelectionMode rubberBandSelectionMode() const;
+    void setRubberBandSelectionMode(Qt::ItemSelectionMode mode);
+#endif
+
+    CacheMode cacheMode() const;
+    void setCacheMode(CacheMode mode);
+    void resetCachedContent();
+
+    bool isInteractive() const;
+    void setInteractive(bool allowed);
+
+    QGraphicsScene *scene() const;
+    void setScene(QGraphicsScene *scene);
+
+    QRectF sceneRect() const;
+    void setSceneRect(const QRectF &rect);
+    inline void setSceneRect(qreal x, qreal y, qreal w, qreal h);
+
+    QMatrix matrix() const;
+    void setMatrix(const QMatrix &matrix, bool combine = false);
+    void resetMatrix();
+    QTransform transform() const;
+    QTransform viewportTransform() const;
+    void setTransform(const QTransform &matrix, bool combine = false);
+    void resetTransform();
+    void rotate(qreal angle);
+    void scale(qreal sx, qreal sy);
+    void shear(qreal sh, qreal sv);
+    void translate(qreal dx, qreal dy);
+
+    void centerOn(const QPointF &pos);
+    inline void centerOn(qreal x, qreal y);
+    void centerOn(const QGraphicsItem *item);
+    void ensureVisible(const QRectF &rect, int xmargin = 50, int ymargin = 50);
+    inline void ensureVisible(qreal x, qreal y, qreal w, qreal h, int xmargin = 50, int ymargin = 50);
+    void ensureVisible(const QGraphicsItem *item, int xmargin = 50, int ymargin = 50);
+    void fitInView(const QRectF &rect, Qt::AspectRatioMode aspectRadioMode = Qt::IgnoreAspectRatio);
+    inline void fitInView(qreal x, qreal y, qreal w, qreal h,
+                          Qt::AspectRatioMode aspectRadioMode = Qt::IgnoreAspectRatio);
+    void fitInView(const QGraphicsItem *item,
+                   Qt::AspectRatioMode aspectRadioMode = Qt::IgnoreAspectRatio);
+
+    void render(QPainter *painter, const QRectF &target = QRectF(), const QRect &source = QRect(),
+                Qt::AspectRatioMode aspectRatioMode = Qt::KeepAspectRatio);
+
+    QList<QGraphicsItem *> items() const;
+    QList<QGraphicsItem *> items(const QPoint &pos) const;
+    inline QList<QGraphicsItem *> items(int x, int y) const;
+    QList<QGraphicsItem *> items(const QRect &rect, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
+    inline QList<QGraphicsItem *> items(int x, int y, int w, int h, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
+    QList<QGraphicsItem *> items(const QPolygon &polygon, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
+    QList<QGraphicsItem *> items(const QPainterPath &path, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
+    QGraphicsItem *itemAt(const QPoint &pos) const;
+    inline QGraphicsItem *itemAt(int x, int y) const;
+
+    QPointF mapToScene(const QPoint &point) const;
+    QPolygonF mapToScene(const QRect &rect) const;
+    QPolygonF mapToScene(const QPolygon &polygon) const;
+    QPainterPath mapToScene(const QPainterPath &path) const;
+    QPoint mapFromScene(const QPointF &point) const;
+    QPolygon mapFromScene(const QRectF &rect) const;
+    QPolygon mapFromScene(const QPolygonF &polygon) const;
+    QPainterPath mapFromScene(const QPainterPath &path) const;
+    inline QPointF mapToScene(int x, int y) const;
+    inline QPolygonF mapToScene(int x, int y, int w, int h) const;
+    inline QPoint mapFromScene(qreal x, qreal y) const;
+    inline QPolygon mapFromScene(qreal x, qreal y, qreal w, qreal h) const;
+
+    QVariant inputMethodQuery(Qt::InputMethodQuery query) const;
+
+    QBrush backgroundBrush() const;
+    void setBackgroundBrush(const QBrush &brush);
+
+    QBrush foregroundBrush() const;
+    void setForegroundBrush(const QBrush &brush);
+
+public Q_SLOTS:
+    void updateScene(const QList<QRectF> &rects);
+    void invalidateScene(const QRectF &rect = QRectF(), QGraphicsScene::SceneLayers layers = QGraphicsScene::AllLayers);
+    void updateSceneRect(const QRectF &rect);
+
+protected Q_SLOTS:
+    void setupViewport(QWidget *widget);
+
+protected:
+    QGraphicsView(QGraphicsViewPrivate &, QWidget *parent = 0);
+    bool event(QEvent *event);
+    bool viewportEvent(QEvent *event);
+
+#ifndef QT_NO_CONTEXTMENU
+    void contextMenuEvent(QContextMenuEvent *event);
+#endif
+    void dragEnterEvent(QDragEnterEvent *event);
+    void dragLeaveEvent(QDragLeaveEvent *event);
+    void dragMoveEvent(QDragMoveEvent *event);
+    void dropEvent(QDropEvent *event);
+    void focusInEvent(QFocusEvent *event);
+    bool focusNextPrevChild(bool next);
+    void focusOutEvent(QFocusEvent *event);
+    void keyPressEvent(QKeyEvent *event);
+    void keyReleaseEvent(QKeyEvent *event);
+    void mouseDoubleClickEvent(QMouseEvent *event);
+    void mousePressEvent(QMouseEvent *event);
+    void mouseMoveEvent(QMouseEvent *event);
+    void mouseReleaseEvent(QMouseEvent *event);
+#ifndef QT_NO_WHEELEVENT
+    void wheelEvent(QWheelEvent *event);
+#endif
+    void paintEvent(QPaintEvent *event);
+    void resizeEvent(QResizeEvent *event);
+    void scrollContentsBy(int dx, int dy);
+    void showEvent(QShowEvent *event);
+    void inputMethodEvent(QInputMethodEvent *event);
+
+    virtual void drawBackground(QPainter *painter, const QRectF &rect);
+    virtual void drawForeground(QPainter *painter, const QRectF &rect);
+    virtual void drawItems(QPainter *painter, int numItems,
+                           QGraphicsItem *items[],
+                           const QStyleOptionGraphicsItem options[]);
+
+private:
+    Q_DECLARE_PRIVATE(QGraphicsView)
+    Q_DISABLE_COPY(QGraphicsView)
+#ifndef QT_NO_CURSOR
+    Q_PRIVATE_SLOT(d_func(), void _q_setViewportCursor(const QCursor &))
+    Q_PRIVATE_SLOT(d_func(), void _q_unsetViewportCursor())
+#endif
+    Q_PRIVATE_SLOT(d_func(), void _q_updateLaterSlot())
+    friend class QGraphicsSceneWidget;
+    friend class QGraphicsScene;
+    friend class QGraphicsScenePrivate;
+};
+
+Q_DECLARE_OPERATORS_FOR_FLAGS(QGraphicsView::CacheMode)
+Q_DECLARE_OPERATORS_FOR_FLAGS(QGraphicsView::OptimizationFlags)
+
+inline void QGraphicsView::setSceneRect(qreal ax, qreal ay, qreal aw, qreal ah)
+{ setSceneRect(QRectF(ax, ay, aw, ah)); }
+inline void QGraphicsView::centerOn(qreal ax, qreal ay)
+{ centerOn(QPointF(ax, ay)); }
+inline void QGraphicsView::ensureVisible(qreal ax, qreal ay, qreal aw, qreal ah, int xmargin, int ymargin)
+{ ensureVisible(QRectF(ax, ay, aw, ah), xmargin, ymargin); }
+inline void QGraphicsView::fitInView(qreal ax, qreal ay, qreal w, qreal h, Qt::AspectRatioMode mode)
+{ fitInView(QRectF(ax, ay, w, h), mode); }
+inline QList<QGraphicsItem *> QGraphicsView::items(int ax, int ay) const
+{ return items(QPoint(ax, ay)); }
+inline QList<QGraphicsItem *> QGraphicsView::items(int ax, int ay, int w, int h, Qt::ItemSelectionMode mode) const
+{ return items(QRect(ax, ay, w, h), mode); }
+inline QGraphicsItem *QGraphicsView::itemAt(int ax, int ay) const
+{ return itemAt(QPoint(ax, ay)); }
+inline QPointF QGraphicsView::mapToScene(int ax, int ay) const
+{ return mapToScene(QPoint(ax, ay)); }
+inline QPolygonF QGraphicsView::mapToScene(int ax, int ay, int w, int h) const
+{ return mapToScene(QRect(ax, ay, w, h)); }
+inline QPoint QGraphicsView::mapFromScene(qreal ax, qreal ay) const
+{ return mapFromScene(QPointF(ax, ay)); }
+inline QPolygon QGraphicsView::mapFromScene(qreal ax, qreal ay, qreal w, qreal h) const
+{ return mapFromScene(QRectF(ax, ay, w, h)); }
+
+#endif // QT_NO_GRAPHICSVIEW
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QGRAPHICSVIEW_H