joint.h

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#ifndef JOINT_H
#define JOINT_H
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#include <QGraphicsItem>
 #include <QList>

 class ArmWidget;
 class ArmRotationWidget;
 class QGraphicsSceneMouseEvent;

 class joint : public QGraphicsItem
 {
 public:
     joint(ArmWidget *graphWidget);
     joint(ArmRotationWidget *graphWidget);

     bool advance(); //update the position of the joint

     QRectF boundingRect() const;
     QPainterPath shape() const;
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);

 protected:
     QVariant itemChange(GraphicsItemChange change, const QVariant &value); // Request update of the parent graph
     void mousePressEvent(QGraphicsSceneMouseEvent *event);
     void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);

 private:
     QPointF newPos;
     ArmWidget *graph;
     ArmRotationWidget *graph_rotation;
 };

#endif // JOINT_H