+
+ /*!
+ * \brief setPath
+ * setPath() allows to compute the graphical shape of the ConnectionItem
+ * taking into account the position/direction of from and to interface items.
+ * Depending on their vlaue, it calls on of the dedicated methods.
+ *
+ * CAUTION: this method calls prepareGeometryChange() so that the scene
+ * can automatically updates and redraw the ConnectionItem. Thus, there is
+ * no need to call update() after the termination of this method.
+ *
+ */
+ void setPath();