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40 
41 #ifndef DIAGRAMITEM_H
42 #define DIAGRAMITEM_H
43 
44 #include <QGraphicsPixmapItem>
45 #include <QList>
46 
47 QT_BEGIN_NAMESPACE
48 class QPixmap;
49 class QGraphicsItem;
50 class QGraphicsScene;
51 class QTextEdit;
52 class QGraphicsSceneMouseEvent;
53 class QMenu;
54 class QGraphicsSceneContextMenuEvent;
55 class QPainter;
56 class QStyleOptionGraphicsItem;
57 class QWidget;
58 class QPolygonF;
59 QT_END_NAMESPACE
60 
61 class Arrow;
62 
63 //! [0]
64 class DiagramItem : public QGraphicsPolygonItem
65 {
66 public:
67     enum { Type = UserType + 15 };
68     enum DiagramType { Step, Conditional, StartEnd, Io };
69 
70     DiagramItem(DiagramType diagramType, QMenu *contextMenu,
71         QGraphicsItem *parent = 0, QGraphicsScene *scene = 0);
72 
73     void removeArrow(Arrow *arrow);
74     void removeArrows();
diagramType()75     DiagramType diagramType() const
76         { return myDiagramType; }
polygon()77     QPolygonF polygon() const
78         { return myPolygon; }
79     void addArrow(Arrow *arrow);
80     QPixmap image() const;
type()81     int type() const
82         { return Type;}
83 
84 protected:
85     void contextMenuEvent(QGraphicsSceneContextMenuEvent *event);
86     QVariant itemChange(GraphicsItemChange change, const QVariant &value);
87 
88 private:
89     DiagramType myDiagramType;
90     QPolygonF myPolygon;
91     QMenu *myContextMenu;
92     QList<Arrow *> arrows;
93 };
94 //! [0]
95 
96 #endif
97