给图片按钮等增加渲染的效果

    下面这个类用来实现鼠标移动等的渐变效果：

     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]; } } } 

 

假设有一个按钮

<mx:Buttton  id = "button1" label = "Comfirm"/>

new GlowTween(this["button1"], 0x00FFFF);

private var mGlowFilter:GlowFilter = new GlowFilter(0xFFFF00, 1, 16, 16, 2, 2);

this["button1"].filters = [mGlowFilter];

this["button1"].filters = null;