Flex中Canvas简单拖动

Canvas组件加监听：

this.addEventListener(MouseEvent.MOUSE_UP,MouseEventFunc);      this.addEventListener(MouseEvent.MOUSE_DOWN,MouseEventFunc);

public function MouseEventFunc(evt:MouseEvent):void
            {
                    switch (evt.type)
                    {
                        case "mouseDown" :
                                downXY=new Point(mouseX,mouseY);                                             
                                evt.currentTarget.startDrag();                                                                        
                                break;
                        case "mouseUp" :
                                upXY=new Point(mouseX,mouseY);                                           
                                evt.currentTarget.stopDrag();                                                                   
                                break;
                        default:
                           break;                       
   
                    }
   
               
   
             }