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#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