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