Long live Qt!

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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_H
+#define QGRAPHICSSCENE_H
+
+#include <QtCore/qobject.h>
+#include <QtCore/qpoint.h>
+#include <QtCore/qrect.h>
+#include <QtGui/qbrush.h>
+#include <QtGui/qfont.h>
+#include <QtGui/qtransform.h>
+#include <QtGui/qmatrix.h>
+#include <QtGui/qpen.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Gui)
+
+#if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW
+
+template<typename T> class QList;
+class QFocusEvent;
+class QFont;
+class QFontMetrics;
+class QGraphicsEllipseItem;
+class QGraphicsItem;
+class QGraphicsItemGroup;
+class QGraphicsLineItem;
+class QGraphicsPathItem;
+class QGraphicsPixmapItem;
+class QGraphicsPolygonItem;
+class QGraphicsProxyWidget;
+class QGraphicsRectItem;
+class QGraphicsSceneContextMenuEvent;
+class QGraphicsSceneDragDropEvent;
+class QGraphicsSceneEvent;
+class QGraphicsSceneHelpEvent;
+class QGraphicsSceneHoverEvent;
+class QGraphicsSceneMouseEvent;
+class QGraphicsSceneWheelEvent;
+class QGraphicsSimpleTextItem;
+class QGraphicsTextItem;
+class QGraphicsView;
+class QGraphicsWidget;
+class QHelpEvent;
+class QInputMethodEvent;
+class QKeyEvent;
+class QLineF;
+class QPainterPath;
+class QPixmap;
+class QPointF;
+class QPolygonF;
+class QRectF;
+class QSizeF;
+class QStyle;
+class QStyleOptionGraphicsItem;
+
+class QGraphicsScenePrivate;
+class Q_GUI_EXPORT QGraphicsScene : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(QBrush backgroundBrush READ backgroundBrush WRITE setBackgroundBrush)
+    Q_PROPERTY(QBrush foregroundBrush READ foregroundBrush WRITE setForegroundBrush)
+    Q_PROPERTY(ItemIndexMethod itemIndexMethod READ itemIndexMethod WRITE setItemIndexMethod)
+    Q_PROPERTY(QRectF sceneRect READ sceneRect WRITE setSceneRect)
+    Q_PROPERTY(int bspTreeDepth READ bspTreeDepth WRITE setBspTreeDepth)
+    Q_PROPERTY(QPalette palette READ palette WRITE setPalette)
+    Q_PROPERTY(QFont font READ font WRITE setFont)
+    Q_PROPERTY(bool sortCacheEnabled READ isSortCacheEnabled WRITE setSortCacheEnabled)
+    Q_PROPERTY(bool stickyFocus READ stickyFocus WRITE setStickyFocus)
+
+public:
+    enum ItemIndexMethod {
+        BspTreeIndex,
+        NoIndex = -1
+    };
+
+    enum SceneLayer {
+        ItemLayer = 0x1,
+        BackgroundLayer = 0x2,
+        ForegroundLayer = 0x4,
+        AllLayers = 0xffff
+    };
+    Q_DECLARE_FLAGS(SceneLayers, SceneLayer)
+
+    QGraphicsScene(QObject *parent = 0);
+    QGraphicsScene(const QRectF &sceneRect, QObject *parent = 0);
+    QGraphicsScene(qreal x, qreal y, qreal width, qreal height, QObject *parent = 0);
+    virtual ~QGraphicsScene();
+
+    QRectF sceneRect() const;
+    inline qreal width() const { return sceneRect().width(); }
+    inline qreal height() const { return sceneRect().height(); }
+    void setSceneRect(const QRectF &rect);
+    inline void setSceneRect(qreal x, qreal y, qreal w, qreal h)
+    { setSceneRect(QRectF(x, y, w, h)); }
+
+    void render(QPainter *painter,
+                const QRectF &target = QRectF(), const QRectF &source = QRectF(),
+                Qt::AspectRatioMode aspectRatioMode = Qt::KeepAspectRatio);
+
+    ItemIndexMethod itemIndexMethod() const;
+    void setItemIndexMethod(ItemIndexMethod method);
+
+    bool isSortCacheEnabled() const;
+    void setSortCacheEnabled(bool enabled);
+
+    int bspTreeDepth() const;
+    void setBspTreeDepth(int depth);
+
+    QRectF itemsBoundingRect() const;
+
+    QList<QGraphicsItem *> items() const;
+    QList<QGraphicsItem *> items(const QPointF &pos) const;
+    QList<QGraphicsItem *> items(const QRectF &rect, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
+    QList<QGraphicsItem *> items(const QPolygonF &polygon, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
+    QList<QGraphicsItem *> items(const QPainterPath &path, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
+    QList<QGraphicsItem *> collidingItems(const QGraphicsItem *item, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
+    QGraphicsItem *itemAt(const QPointF &pos) const;
+
+    inline QList<QGraphicsItem *> items(qreal x, qreal y, qreal w, qreal h, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const
+    { return items(QRectF(x, y, w, h), mode); }
+    inline QGraphicsItem *itemAt(qreal x, qreal y) const
+    { return itemAt(QPointF(x, y)); }
+
+    QList<QGraphicsItem *> selectedItems() const;
+    QPainterPath selectionArea() const;
+    void setSelectionArea(const QPainterPath &path);
+    void setSelectionArea(const QPainterPath &path, Qt::ItemSelectionMode);
+
+    QGraphicsItemGroup *createItemGroup(const QList<QGraphicsItem *> &items);
+    void destroyItemGroup(QGraphicsItemGroup *group);
+
+    void addItem(QGraphicsItem *item);
+    QGraphicsEllipseItem *addEllipse(const QRectF &rect, const QPen &pen = QPen(), const QBrush &brush = QBrush());
+    QGraphicsLineItem *addLine(const QLineF &line, const QPen &pen = QPen());
+    QGraphicsPathItem *addPath(const QPainterPath &path, const QPen &pen = QPen(), const QBrush &brush = QBrush());
+    QGraphicsPixmapItem *addPixmap(const QPixmap &pixmap);
+    QGraphicsPolygonItem *addPolygon(const QPolygonF &polygon, const QPen &pen = QPen(), const QBrush &brush = QBrush());
+    QGraphicsRectItem *addRect(const QRectF &rect, const QPen &pen = QPen(), const QBrush &brush = QBrush());
+    QGraphicsTextItem *addText(const QString &text, const QFont &font = QFont());
+    QGraphicsSimpleTextItem *addSimpleText(const QString &text, const QFont &font = QFont());
+    QGraphicsProxyWidget *addWidget(QWidget *widget, Qt::WindowFlags wFlags = 0);
+    inline QGraphicsEllipseItem *addEllipse(qreal x, qreal y, qreal w, qreal h, const QPen &pen = QPen(), const QBrush &brush = QBrush())
+    { return addEllipse(QRectF(x, y, w, h), pen, brush); }
+    inline QGraphicsLineItem *addLine(qreal x1, qreal y1, qreal x2, qreal y2, const QPen &pen = QPen())
+    { return addLine(QLineF(x1, y1, x2, y2), pen); }
+    inline QGraphicsRectItem *addRect(qreal x, qreal y, qreal w, qreal h, const QPen &pen = QPen(), const QBrush &brush = QBrush())
+    { return addRect(QRectF(x, y, w, h), pen, brush); }
+    void removeItem(QGraphicsItem *item);
+    
+    QGraphicsItem *focusItem() const;
+    void setFocusItem(QGraphicsItem *item, Qt::FocusReason focusReason = Qt::OtherFocusReason);
+    bool hasFocus() const;
+    void setFocus(Qt::FocusReason focusReason = Qt::OtherFocusReason);
+    void clearFocus();
+
+    void setStickyFocus(bool enabled);
+    bool stickyFocus() const;
+
+    QGraphicsItem *mouseGrabberItem() const;
+
+    QBrush backgroundBrush() const;
+    void setBackgroundBrush(const QBrush &brush);
+
+    QBrush foregroundBrush() const;
+    void setForegroundBrush(const QBrush &brush);
+
+    virtual QVariant inputMethodQuery(Qt::InputMethodQuery query) const;
+
+    QList <QGraphicsView *> views() const;
+
+    inline void update(qreal x, qreal y, qreal w, qreal h)
+    { update(QRectF(x, y, w, h)); }
+    inline void invalidate(qreal x, qreal y, qreal w, qreal h, SceneLayers layers = AllLayers)
+    { invalidate(QRectF(x, y, w, h), layers); }
+
+    QStyle *style() const;
+    void setStyle(QStyle *style);
+
+    QFont font() const;
+    void setFont(const QFont &font);
+
+    QPalette palette() const;
+    void setPalette(const QPalette &palette);
+
+    QGraphicsWidget *activeWindow() const;
+    void setActiveWindow(QGraphicsWidget *widget);
+
+public Q_SLOTS:
+    void update(const QRectF &rect = QRectF());
+    void invalidate(const QRectF &rect = QRectF(), SceneLayers layers = AllLayers);
+    void advance();
+    void clearSelection();
+    void clear();
+
+protected:
+    bool event(QEvent *event);
+    bool eventFilter(QObject *watched, QEvent *event);
+    virtual void contextMenuEvent(QGraphicsSceneContextMenuEvent *event);
+    virtual void dragEnterEvent(QGraphicsSceneDragDropEvent *event);
+    virtual void dragMoveEvent(QGraphicsSceneDragDropEvent *event);
+    virtual void dragLeaveEvent(QGraphicsSceneDragDropEvent *event);
+    virtual void dropEvent(QGraphicsSceneDragDropEvent *event);
+    virtual void focusInEvent(QFocusEvent *event);
+    virtual void focusOutEvent(QFocusEvent *event);
+    virtual void helpEvent(QGraphicsSceneHelpEvent *event);
+    virtual void keyPressEvent(QKeyEvent *event);
+    virtual void keyReleaseEvent(QKeyEvent *event);
+    virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);
+    virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
+    virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
+    virtual void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event);
+    virtual void wheelEvent(QGraphicsSceneWheelEvent *event);
+    virtual 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[],
+                           QWidget *widget = 0);
+
+protected Q_SLOTS:
+    bool focusNextPrevChild(bool next);
+
+Q_SIGNALS:
+    void changed(const QList<QRectF> &region);
+    void sceneRectChanged(const QRectF &rect);
+    void selectionChanged();
+
+private:
+    void itemUpdated(QGraphicsItem *item, const QRectF &rect);
+
+    Q_DECLARE_PRIVATE(QGraphicsScene)
+    Q_DISABLE_COPY(QGraphicsScene)
+    Q_PRIVATE_SLOT(d_func(), void _q_updateIndex())
+    Q_PRIVATE_SLOT(d_func(), void _q_emitUpdated())
+    Q_PRIVATE_SLOT(d_func(), void _q_removeItemLater(QGraphicsItem *item))
+    Q_PRIVATE_SLOT(d_func(), void _q_updateLater())
+    Q_PRIVATE_SLOT(d_func(), void _q_polishItems())
+    Q_PRIVATE_SLOT(d_func(), void _q_updateSortCache())
+    Q_PRIVATE_SLOT(d_func(), void _q_resetDirtyItems())
+    friend class QGraphicsItem;
+    friend class QGraphicsItemPrivate;
+    friend class QGraphicsView;
+    friend class QGraphicsViewPrivate;
+    friend class QGraphicsWidget;
+    friend class QGraphicsWidgetPrivate;
+};
+
+Q_DECLARE_OPERATORS_FOR_FLAGS(QGraphicsScene::SceneLayers)
+
+#endif // QT_NO_GRAPHICSVIEW
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif