[AS3]as3写的一个加载进度条源代码

[AS3]as3写的一个加载进度条源代码

package com.iman.sps.sheet.ascript   
{   
    import flash.display.Sprite;   
    import flash.display.*;    
    import flash.events.*;    
    import flash.filters.BitmapFilterQuality;    
    import flash.filters.BlurFilter;    
    import flash.geom.Matrix;    
    import flash.net.*;    
    import flash.text.TextField;    
    import flash.utils.*;    
    import flash.system.Capabilities;    
       
    import mx.events.*;    
   
    import mx.preloaders.IPreloaderDisplay;   
       
    public class MyProgressBar extends Sprite implements IPreloaderDisplay   
    {   
        [Embed(source="../image/logo.gif", mimeType="application/octet-stream")]    
        public var _loadingLogo:Class;    
           
        private var dpbImageControl:Loader;    
        private var _barSprite:Sprite;    
        private var progressText:TextField;           
        private var ProgressBarSpritIsAdded:Boolean = false;    
   
        public function MyProgressBar()   
        {   
            super();   
        }   
           
        // Specify the event listeners.    
        public function set preloader(preloader:Sprite):void {    
            //Listen for 正在下载    
            preloader.addEventListener(ProgressEvent.PROGRESS, handleProgress);    
            //Listen for 下载完成    
            preloader.addEventListener(Event.COMPLETE, handleComplete);    
            //Listen for 正在初始化    
            preloader.addEventListener(FlexEvent.INIT_PROGRESS, handleInitProgress);    
            //Listen for 初始化完成    
            preloader.addEventListener(FlexEvent.INIT_COMPLETE, handleInitComplete);    
        }    
           
        // Initialize the Loader control in the override    
        // of IPreloaderDisplay.initialize().    
        public function initialize():void {    
            //添加logo图    
            dpbImageControl = new Loader();          
            dpbImageControl.contentLoaderInfo.addEventListener(Event.COMPLETE, loader_completeHandler);    
            dpbImageControl.loadBytes(new _loadingLogo() as ByteArray);    
            //dpbImageControl.load(new URLRequest("loadinglogo.swf"));    
        }    
           
           
        // After the SWF file loads, set the size of the Loader control.    
        private function loader_completeHandler(event:Event):void    
        {            
            addChild(dpbImageControl);    
            dpbImageControl.width = 136;    
            dpbImageControl.height= 54;    
            dpbImageControl.x = this.stage.stageWidth/2 - dpbImageControl.width/2;    
            dpbImageControl.y = this.stage.stageHeight/2 - dpbImageControl.height/2 - 40;    
        }      
           
        //    
        private function addProgressBarSprit():void{    
            //绘制背景渐变    
            var matrix:Matrix=new Matrix();    
            matrix.createGradientBox(this.stage.stageWidth,this.stage.stageHeight,Math.PI/2);    
            var colors:Array=[0x3399ff,0xFFFFFF];    
            var alphas:Array=[1,1];    
            var ratios:Array=[0,255];    
            this.graphics.lineStyle();    
            this.graphics.beginGradientFill(GradientType.LINEAR,colors,alphas,ratios,matrix);           
            this.graphics.drawRect(0,0,this.stage.stageWidth,this.stage.stageHeight);    
            this.graphics.endFill();    
               
            //绘制中心白色发光    
            var _Sprite1:Sprite = new Sprite();    
            addChild(_Sprite1);    
            _Sprite1.graphics.beginFill(0xffffff,0.45);    
            _Sprite1.graphics.drawEllipse(this.stage.stageWidth/2-130, this.stage.stageHeight/2-90, 280, 100);    
            _Sprite1.graphics.endFill();    
            //滤镜实现发光边缘柔和               
            var blur:BlurFilter = new BlurFilter();    
            blur.blurX = 100;    
            blur.blurY = 50;    
            blur.quality = BitmapFilterQuality.HIGH;    
            _Sprite1.filters = [blur];    
               
            //-------------------------------------------------    
               
            //绘制进度条背景    
            var _Sprite2:Sprite = new Sprite();    
            addChild(_Sprite2);    
            _Sprite2.graphics.lineStyle(1, 0xCCCCCC);    
            _Sprite2.graphics.beginFill(0xFFFFFF);    
            _Sprite2.graphics.drawRect((this.stage.stageWidth/2 - 152), (this.stage.stageHeight/2 - 10), 304, 20);      
            _Sprite2.graphics.endFill();    
               
            //-------------------------------------------------    
               
            //加载进度条Sprite    
            _barSprite = new Sprite();    
            addChild(_barSprite);    
            _barSprite.x = this.stage.stageWidth/2 - 150;    
            _barSprite.y = this.stage.stageHeight/2 - 8;    
               
            //-------------------------------------------------    
               
            //加载进度条文字    
            progressText = new TextField();    
            addChild(progressText);    
            progressText.textColor = 0x333333;    
            progressText.width = 300;    
            progressText.height = 18;    
            progressText.x = this.stage.stageWidth/2 - 152;    
            progressText.y = this.stage.stageHeight/2 + 20;    
        }    
           
        //刷新进度条    
        private function drawProgressBar(bytesLoaded:Number, bytesTotal:Number):void    
        {      
            if (_barSprite != null && progressText != null){    
                var g:Graphics = _barSprite.graphics;    
                g.clear();    
                g.beginFill(0xCCCCCC);    
                g.drawRect(0, 0, 300*(bytesLoaded/bytesTotal),16);      
                g.endFill();       
                   
                var matrix:Matrix=new Matrix();    
                matrix.createGradientBox(300*(bytesLoaded/bytesTotal),16,Math.PI/2);    
                var colors:Array=[0x0099CC,0x99cc77];    
                var alphas:Array=[1,1];    
                var ratios:Array=[0,255];    
                g.lineStyle();    
                g.beginGradientFill(GradientType.LINEAR,colors,alphas,ratios,matrix);           
                g.drawRect(0,0,300*(bytesLoaded/bytesTotal),16);    
                g.endFill();     
                   
                   
            }    
        }    
           
        //正在下载的进度    
        private function handleProgress(event:ProgressEvent):void {    
            //第一次处理时绘制进度条Sprit    
            if (ProgressBarSpritIsAdded == false){    
                ProgressBarSpritIsAdded = true;    
                addProgressBarSprit();    
            }    
               
            if (progressText != null){    
                progressText.text = "下载进度：已下载 " + event.bytesLoaded + " byte，总大小 " + event.bytesTotal + " byte.";    
            }            
            drawProgressBar(event.bytesLoaded, event.bytesTotal);    
        }    
           
        private function handleComplete(event:Event):void {    
            if (progressText != null){    
                progressText.text = "下载完成.";    
            }    
            drawProgressBar(1,1);           
        }    
           
        private function handleInitProgress(event:Event):void {    
            if (progressText != null){    
                progressText.text = "正在初始化...";    
            }    
            drawProgressBar(1,1);    
        }    
           
        private function handleInitComplete(event:Event):void {    
            if (progressText != null){    
                progressText.text = "初始化完成.";    
            }    
            drawProgressBar(1,1);            
               
            //0.03秒后抛出完成事件    
            var timer:Timer = new Timer(300,1);    
            timer.addEventListener(TimerEvent.TIMER, dispatchComplete);    
            timer.start();         
        }    
           
        private function dispatchComplete(event:TimerEvent):void {    
            dispatchEvent(new Event(Event.COMPLETE));    
        }    
   
           
        public function get backgroundAlpha():Number   
        {   
            return 0;   
        }   
           
        public function set backgroundAlpha(value:Number):void   
        {   
        }   
           
        public function get backgroundColor():uint   
        {   
            return 0;   
        }   
           
        public function set backgroundColor(value:uint):void   
        {   
        }   
           
        public function get backgroundImage():Object   
        {   
            return null;   
        }   
           
        public function set backgroundImage(value:Object):void   
        {   
        }   
           
        public function get backgroundSize():String   
        {   
            return null;   
        }   
           
        public function set backgroundSize(value:String):void   
        {   
        }   
           
           
           
        public function get stageHeight():Number   
        {   
            return 0;   
        }   
           
        public function set stageHeight(value:Number):void   
        {   
        }   
           
        public function get stageWidth():Number   
        {   
            return 0;   
        }   
           
        public function set stageWidth(value:Number):void   
        {   
        }   
           
           
    }   
}