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50
51#ifndef NODE_H
52#define NODE_H
53
54#include <QGraphicsItem>
55#include <QVector>
56
57class Edge;
58class GraphWidget;
59
60//! [0]
61class Node : public QGraphicsItem
62{
63public:
64 Node(GraphWidget *graphWidget);
65
66 void addEdge(Edge *edge);
67 QVector<Edge *> edges() const;
68
69 enum { Type = UserType + 1 };
70 int type() const override { return Type; }
71
72 void calculateForces();
73 bool advancePosition();
74
75 QRectF boundingRect() const override;
76 QPainterPath shape() const override;
77 void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
78
79protected:
80 QVariant itemChange(GraphicsItemChange change, const QVariant &value) override;
81
82 void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
83 void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
84
85private:
86 QVector<Edge *> edgeList;
87 QPointF newPos;
88 GraphWidget *graph;
89};
90//! [0]
91
92#endif // NODE_H
93

source code of qtbase/examples/widgets/graphicsview/elasticnodes/node.h