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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 examples 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 DIAGRAMSCENE_H
+#define DIAGRAMSCENE_H
+
+#include <QGraphicsScene>
+#include "diagramitem.h"
+#include "diagramtextitem.h"
+
+QT_BEGIN_NAMESPACE
+class QGraphicsSceneMouseEvent;
+class QMenu;
+class QPointF;
+class QGraphicsLineItem;
+class QFont;
+class QGraphicsTextItem;
+class QColor;
+QT_END_NAMESPACE
+
+//! [0]
+class DiagramScene : public QGraphicsScene
+{
+    Q_OBJECT
+
+public:
+    enum Mode { InsertItem, InsertLine, InsertText, MoveItem };
+
+    DiagramScene(QMenu *itemMenu, QObject *parent = 0);
+    QFont font() const
+        { return myFont; }
+    QColor textColor() const
+        { return myTextColor; }
+    QColor itemColor() const
+        { return myItemColor; }
+    QColor lineColor() const
+        { return myLineColor; }
+    void setLineColor(const QColor &color);
+    void setTextColor(const QColor &color);
+    void setItemColor(const QColor &color);
+    void setFont(const QFont &font);
+
+public slots:
+    void setMode(Mode mode);
+    void setItemType(DiagramItem::DiagramType type);
+    void editorLostFocus(DiagramTextItem *item);
+
+signals:
+    void itemInserted(DiagramItem *item);
+    void textInserted(QGraphicsTextItem *item);
+    void itemSelected(QGraphicsItem *item);
+
+protected:
+    void mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent);
+    void mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent);
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent);
+
+private:
+    bool isItemChange(int type);
+
+    DiagramItem::DiagramType myItemType;
+    QMenu *myItemMenu;
+    Mode myMode;
+    bool leftButtonDown;
+    QPointF startPoint;
+    QGraphicsLineItem *line;
+    QFont myFont;
+    DiagramTextItem *textItem;
+    QColor myTextColor;
+    QColor myItemColor;
+    QColor myLineColor;
+};
+//! [0]
+
+#endif