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加濾鏡效果GlowTween

/** *  * new GlowTween(xxxx, 0xFFFF00); * new GlowTween(xxxx, 0x00FFFF); * GlowTween */package com.riaidea.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];            }    }    }