imgbox.mxml

《Flex第一步:基于ActionScript 3.0的Flex 2应用开发》采用概念讲解与实例结合的方式

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" width="90" height="90">

	<mx:Metadata>
        <!-- 涓轰簨浠跺拰鏁堟灉瑙﹀彂鍣ㄥ畾涔夊厓鏁版嵁 -->
        [Event(name="hideImage", type="flash.events.Event")]
        [Event(name="showImage", type="flash.events.Event")]
        [Effect(name="hideImageEffect", event="hideImage")]
        [Effect(name="showImageEffect", event="showImage")]
    </mx:Metadata>

	<mx:Script>
		<![CDATA[
			internal function doDown():void{
				dispatchEvent(new Event("hideImage"));
			}
			internal function doUp():void{
				dispatchEvent(new Event("showImage"));
			}
		]]>
	</mx:Script>
	<mx:Image id="img" source="tree.jpg" mouseDown="doDown()" mouseUp="doUp()"/>	
</mx:Canvas>