diagramitem.h

奇趣公司比较新的qt/emd版本

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#ifndef DIAGRAMITEM_H
#define DIAGRAMITEM_H

#include <QGraphicsPixmapItem>
#include <QList>

class QPixmap;
class QGraphicsItem;
class QGraphicsScene;
class QTextEdit;
class QGraphicsSceneMouseEvent;
class QMenu;
class QGraphicsSceneContextMenuEvent;
class QPainter;
class QStyleOptionGraphicsItem;
class QWidget;
class QPolygonF;
class Arrow;

class DiagramItem : public QGraphicsPolygonItem
{
public:
    enum { Type = UserType + 15 };
    enum DiagramType { Step, Conditional, StartEnd, Io };

    DiagramItem(DiagramType diagramType, QMenu *contextMenu,
        QGraphicsItem *parent = 0, QGraphicsScene *scene = 0);

    void removeArrow(Arrow *arrow);
    void removeArrows();
    DiagramType diagramType() const
        { return myDiagramType; }
    QPolygonF polygon() const
        { return myPolygon; }
    void addArrow(Arrow *arrow);
    QPixmap image() const;
    int type() const
        { return Type;}

protected:
    void contextMenuEvent(QGraphicsSceneContextMenuEvent *event);
    QVariant itemChange(GraphicsItemChange change, const QVariant &value);

private:
    DiagramType myDiagramType;
    QPolygonF myPolygon;
    QMenu *myContextMenu;
    QList<Arrow *> arrows;
};

#endif