edge.h

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#ifndef EDGE_H
#define EDGE_H
 
#include <QGraphicsItem>
 
class Node;
 
class Edge : public QGraphicsItem
{
public:
    Edge(Node *sourceNode, Node *destNode);
 
    Node *sourceNode() const;
    Node *destNode() const;
 
    void adjust();
 
    enum { Type = UserType + 2 };
    int type() const override { return Type; }
 
protected:
    QRectF boundingRect() const override;
    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
 
private:
    Node *source, *dest;
 
    QPointF sourcePoint;
    QPointF destPoint;
    qreal arrowSize = 10;
};
 
#endif // EDGE_H