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