Actionscript 3 实现控件 闪烁效果

package com.tween
{
    import flash.display.InteractiveObject;
    import flash.events.Event;
    import flash.events.MouseEvent;
    import flash.filters.GlowFilter;

    public class GlowTween
    {
        private var _target:InteractiveObject;
        private var _color:uint;
        private var _toggle:Boolean;
        private var _blur:Number;

        public function GlowTween(target:InteractiveObject, color:uint=0xFFFFFF)
        {
            _target=target;
            _color=color;
            _toggle=true;
            _blur=2;
            target.addEventListener(MouseEvent.ROLL_OVER, startGlowHandler);
            target.addEventListener(MouseEvent.ROLL_OUT, stopGlowHandler);
        }

        public function remove():void
        {
            _target.removeEventListener(MouseEvent.ROLL_OVER, startGlowHandler);
            _target.removeEventListener(MouseEvent.ROLL_OUT, stopGlowHandler);
            _target.removeEventListener(Event.ENTER_FRAME, blinkHandler);
            _target.filters=null;
            _target=null;
        }

        private function startGlowHandler(evt:MouseEvent):void
        {
            _target.addEventListener(Event.ENTER_FRAME, blinkHandler, false, 0, true);
        }

        private function stopGlowHandler(evt:MouseEvent):void
        {
            _target.removeEventListener(Event.ENTER_FRAME, blinkHandler);
            _target.filters=null;
        }

        private function blinkHandler(evt:Event):void
        {
            if (_blur >= 20)
                _toggle=false;
            else if (_blur <= 2)
                _toggle=true;
            _toggle ? _blur++ : _blur--;
            var glow:GlowFilter=new GlowFilter(_color, 1, _blur, _blur, 2, 2);
            _target.filters=[glow];
        }
    }
}






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<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
                layout="absolute"
                initialize="glintEffect1()"
                 backgroundGradientAlphas="[1.0, 1.0]"
                  backgroundGradientColors="[#400040, #400040]">
    <mx:Script>
        <![CDATA[
            import flash.display.*;
            import flash.text.TextField;
            import com.tween.GlowTween;
            private function glintEffect1():void
            {
                new GlowTween(image1, 0xFFFF00);
                new GlowTween(image2, 0x00FFFF);
            }
        ]]>
    </mx:Script>
    <mx:Image x="69" y="29" id="image2" source="images/Sleek_XP_064.png" width="88" height="74"/>
    <mx:Image x="214" y="29" id="image1" source="images/Sleek_XP_026.png" width="84" height="74"/>

</mx:Application>