private void OnEnable()
 {
     this.isDraging = false;
     IT_Gesture.add_onDraggingStartE(new IT_Gesture.DraggingStartHandler(this.OnDraggingStart));
     IT_Gesture.add_onDraggingE(new IT_Gesture.DraggingHandler(this.OnDragging));
     IT_Gesture.add_onDraggingEndE(new IT_Gesture.DraggingEndHandler(this.OnDraggingEnd));
 }