package cn.ishion.component
{
import flash.display.DisplayObject;
import flash.display.Graphics;
import flash.display.Loader;
import flash.display.LoaderInfo;
import flash.display.Sprite;
import flash.events.Event;
import flash.events.ProgressEvent;
import flash.geom.Point;
import flash.geom.Rectangle;
import flash.net.URLRequest;
import flash.text.TextField;
import flash.utils.clearTimeout;
import flash.utils.setTimeout;
import mx.events.FlexEvent;
import mx.preloaders.IPreloaderDisplay;
public class ConstomPreloader extends Sprite implements IPreloaderDisplay
{
private var url:String="loader1.swf";
private var loadContent:Object;//加载的内容
private var swfLoader:Loader;//加载swf东西
private var hasLoad:Boolean=false; //
private var preTxt:TextField;
private var swfWidth:Number=800;
private var swfHeight:Number=600;
private var _pregressRect:Rectangle;
private var progressSprite:Sprite;
public function get pregressRect():Rectangle{
return new Rectangle(0,0,400,10);
}
public function ConstomPreloader()
{
super();
loadSWF();
}
private function loadSWF():void
{
swfLoader=new Loader();
swfLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, onComplete);
swfLoader.load(new URLRequest(url));
}
private function onComplete(event:Event):void
{
var loadInfo:LoaderInfo=event.target as LoaderInfo;
this.loadContent=loadInfo.content;
this.hasLoad=true;
createChild()
}
private function createChild():void
{
this.loadContent.x=Object(this.stage.stageWidth / 2 - swfWidth / 2);
this.loadContent.y=Object(this.stage.stageHeight / 2 - swfHeight / 2);
this.addChild(this.loadContent as DisplayObject);
//搞不明白，stage.width stage.stageWidth
trace(this.stageWidth+"::"+this.stageHeight);
trace(this.stage.stageWidth+":::"+this.stage.stageHeight);
trace(this.stage.stageWidth+":::"+this.stage.stageHeight);
trace(this.loadContent.stage.width+"ssss"+this.loadContent.stage.height);
var contentPoint:Point=new Point;
contentPoint.x=this.stage.stageWidth/2-this.swfWidth/2;
contentPoint.y=this.stage.stageHeight/2-this.swfHeight/2;
preTxt=new TextField();
preTxt.selectable=false;
preTxt.x=contentPoint.x + 200;
preTxt.y=contentPoint.y + 400;
preTxt.text="正在加载中";
this.addChild(preTxt);
this.progressSprite=new Sprite();
this.progressSprite.x=this.preTxt.x;
this.progressSprite.y=this.preTxt.y+20;
var gra:Graphics=this.progressSprite.graphics
gra.beginFill(0x0000ff,1);
gra.drawRect(this.pregressRect.x,this.pregressRect.y,this.pregressRect.width,this.pregressRect.height);
gra.endFill();
this.addChild(this.progressSprite);
}
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 set preloader(obj:Sprite):void
{
//Listen for 正在下载
obj.addEventListener(ProgressEvent.PROGRESS, handleProgress);
//Listen for 下载完成
obj.addEventListener(Event.COMPLETE, handleComplete);
//Listen for 正在初始化
obj.addEventListener(FlexEvent.INIT_PROGRESS, handleInitProgress);
//Listen for 初始化完成
obj.addEventListener(FlexEvent.INIT_COMPLETE, handleInitComplete);
}
protected function handleProgress(event:ProgressEvent):void
{
this.setProgress(event.bytesLoaded, event.bytesTotal);
}
protected function handleComplete(event:Event):void
{
if(this.hasLoad){
this.preTxt.text="应用程序加载完成";
}
}
protected function setProgress(completed:Number, total:Number):void
{
if (!isNaN(completed) && !isNaN(total) && completed >= 0 && total > 0)
{
var value:Number=Number(completed);
var maximum:Number=Number(total);
draw(value, maximum);
}
}
private function draw(value:Number, maxnum:Number):void
{
if (this.hasLoad)
{
var currentLoad:Number=this.getPercentLoaded(value,maxnum);
this.preTxt.text="当前加载" +currentLoad + "%";
var g:Graphics=this.progressSprite.graphics;
g.beginFill(0xcc6699,1);
g.drawRect(this.pregressRect.x,this.pregressRect.y+2,this.pregressRect.width*currentLoad/100,this.pregressRect.height-4);
g.endFill();
}
}
protected function getPercentLoaded(loaded:Number, total:Number):Number
{
var perc:Number;
if (loaded == 0 || total == 0 || isNaN(total) || isNaN(loaded))
return 0;
else
perc=100 * loaded / total;
if (isNaN(perc) || perc <= 0)
return 0;
else if (perc > 99)
return 99;
else
return Math.round(perc);
}
protected function handleInitProgress(event:FlexEvent):void
{
if(this.hasLoad){
this.preTxt.text="应用程序初始化";
}
}
protected function handleInitComplete(event:FlexEvent):void
{
this.preTxt.text="应用程序初始化完成，开始进入主见面"
this.loadContent.addEventListener("framequit",clearLoad);
this.loadContent.gotoAndPlay("complete");
// var id:int=setTimeout(clearLoad,2000,id);
}
private function clearLoad(event:Event):void{
this.loadContent.removeEventListener("framequit",clearLoad);
this.removeChild(this.progressSprite);
this.removeChild(this.loadContent as DisplayObject);
this.removeChild(this.preTxt);
this.swfLoader.unload();//卸载资源
this.dispatchEvent(new Event(Event.COMPLETE));
}
public function get stageHeight():Number
{
return 500;
}
public function set stageHeight(value:Number):void
{
}
public function get stageWidth():Number
{
return 375;
}
public function set stageWidth(value:Number):void
{
}
public function initialize():void
{
}
}
}
相关资源：敏捷开发V1.0.pptx
