flex的事件响应体会2

接1
如果单独定义一个canvas页，然后把鼠标事件加到该页，通过主页调用这个canvas，则canvas页上的鼠标动作事件能够正常地响应定义在它里面的函数。
canvas定义eventcanvas.mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" width="400" height="1200"
mouseDown="OnMouseDown(event)"
mouseMove="OnMouseMove(event)"
mouseUp="OnMouseUp(event)" 
>


<mx:Script>
<![CDATA[
        import mx.controls.Alert;
import flash.geom.Matrix;
        import flash.geom.Point;
        import mx.managers.CursorManager;      

 
    //鼠标按下响应事件
   public function OnMouseDown(event:MouseEvent):void
    {

       trace("MOUSE DOWN canvas");
    //  Alert.show("MOUSE DOWN canvas");
    }
    //鼠标移动响应事件
   public function OnMouseMove(event:MouseEvent):void
    {
        //如果鼠标左键按下
/*         Alert.show("MOUSE move canvas"); */
trace("MOUSE Move canvas");
    }
    //鼠标抬起响应事件
    public function OnMouseUp(event:MouseEvent):void
    {
        //如果鼠标左键按下
  trace("MOUSE Up canvas");
      //Alert.show("MOUSE UP canvas");
    }


]]>
</mx:Script>
</mx:Canvas>