//Copyright © 2008. Http://L4cd.Net All Rights Reserved.
package {
	import flash.display.*;
	import flash.events.*;
	import flash.text.*;
	import flash.net.*;
	import flash.utils.*;
	import fl.managers.*;
	import flash.system.*;

	public class FileReference_download extends Sprite {
		private var file:FileReference;
		private var texthtml:String;
		private var time:Number;
			public function FileReference_download() {
			stage.scaleMode = "noScale";
			var style:TextFormat = new TextFormat("Verdana",12);
			StyleManager.setStyle("textFormat",style)
			
			
			texthtml = "请在上方输入框内输入需要下载的文件地址,外网文件请注意是否有跨域文件.<br/><br/>当前的文件为一个空的swf,为了看到下载效果,我导入了一个中文字体."
			txt.htmlText = texthtml
			
			file = new FileReference();
			file.addEventListener(Event.CANCEL, cancelHandler);
			file.addEventListener(Event.COMPLETE, completeHandler);
			file.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
			file.addEventListener(Event.OPEN, openHandler);
			file.addEventListener(ProgressEvent.PROGRESS, progressHandler);
			file.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);
			file.addEventListener(Event.SELECT, selectHandler);
			bt.addEventListener(MouseEvent.CLICK,startHandler)
		}
		private function startHandler(event:MouseEvent):void {
			if(bt.label == "取消下载"){
				file.cancel();
				txt.htmlText += "下载已取消."
				bt.label = "开始下载"
				return;
			}
			try{
				file.download(new URLRequest(url.text));
			}catch(e:Error){
				txt.htmlText = e.message
			}
		}
		private function cancelHandler(event:Event):void {
			bt.label = "开始下载"
			texthtml = "下载已取消.<br/>"
				txt.htmlText = texthtml;
		}

		private function completeHandler(event:Event):void {
			bt.label = "开始下载"
			txt.htmlText += "下载完毕."
		}

		private function ioErrorHandler(event:IOErrorEvent):void {
			bt.label = "开始下载"
			texthtml = "无较的下载地址.<br/>";
				txt.htmlText = texthtml;
		}

		private function openHandler(event:Event):void {
			texthtml += "正在连接成功,开始下载...<br/>";
				txt.htmlText = texthtml;
			time = getTimer();
		}

		private function progressHandler(event:ProgressEvent):void {
			var file:FileReference = FileReference(event.target);
			var s:Array = [];
			s["total"] = event.bytesTotal;
			s["loaded"] = event.bytesLoaded;
			s["speed"] = int(event.bytesLoaded/(getTimer() - time)*100)/100;
			s["t1"] = int((getTimer() - time)/1000*100)/100;
			s["t2"] = int((s["total"] - s["loaded"])/s["speed"]/1000*100)/100;
			
			
			var t:String = "总字节　: "+s["total"]+"<br/>";
			t += "下载字节: "+s["loaded"]+"<br/>";
			t += "百分比　: "+percentText(s["loaded"]/s["total"]*100)+int(s["loaded"]/s["total"]*10000)/100+"%<br/>";
			t += "平均速度: "+s["speed"]+"kb<br/>";
			t += "已用时间: "+s["t1"]+"秒<br/>";
			t += "剩余时间: "+s["t2"]+"秒<br/>";
			txt.htmlText = texthtml + t;
		}
		private function percentText(ps:int):String{
			var txt:String = "";
			for(var i:uint = 0;i<int(ps/5);i++)txt+="|";
			return txt+"..."
			
		}
		 private function securityErrorHandler(event:SecurityErrorEvent):void {
			bt.label = "开始下载"
			texthtml += "<font color='#ff6600'>"+event.text+"</font><br/>"
			txt.htmlText = texthtml;
		}

		private function selectHandler(event:Event):void {
			bt.label = "取消下载"
			texthtml = "正在进行连接...<br/>";
			txt.htmlText = texthtml;
		}
	}
}