2012、09、27 听课笔记

                                                            相册的制作

package
     {
          import flash.display.Sprite;
          import flash.display.Loader;
          import flash.net.URLRequest;
          import flash.events.Event;
          import flash.events.MouseEvent;
          import flash.utils.ByteArray;
          import flash.display.Bitmap;
          import flash.events.ProgressEvent;
      public class Photos extends Sprite
         {
                    private var loader:Loader;
                    private var url:URLRequest;
                    private var num:int=5;
                    private var str:String;
                    private var arr_pic:Array=[];
     public function Photos():void
        {
            init();
       }
   private function init():void
      {
          for(var i:int=1;i<=num;i++)
         {
               str='images/'+i+'.jpg';
               url=new URLRequest(str);
               loader=new Loader();
               loader.load(url);
               addChild(loader);
               arr_pic.push(loader);//数组里放到是加载每个图片的loader
               loader.contentLoaderInfo.addEventListener(Event.COMPLETE,oncom);
               loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS,onpro);
         }
   }
  
     private function onpro(e:ProgressEvent):void
        {
              trace(e.bytesLoaded/e.bytesTotal);
       }
  
  private function oncom(e:Event):void
       {
             e.target.loader.width=100;
             e.target.loader.height=100;
   
     for(var i:int=0;i<arr_pic.length;i++)
         {
              arr_pic[i].x=i * arr_pic[i].width+30;//设置图片的X坐标
              arr_pic[i].y=300;//设置图片的X坐标
              arr_pic[i].addEventListener(MouseEvent.CLICK,onbig);
         }
    }
  
  private function onbig(e:MouseEvent):void
        {
              var index:int=arr_pic.indexOf(e.target);
              var url_big:String='images/'+(index+1)+'.jpg';
              url=new URLRequest(url_big);
              loader=new Loader();
              loader.load(url);
              loader.x=80;
//   loader.width = 400;
//   loader.height = 300;
             addChild(loader);
             loader.contentLoaderInfo.addEventListener(Event.COMPLETE,onbigpic);
      }
  
  private function onbigpic(e:Event):void
     {
        e.target.loader.width=400;
        e.target.loader.height=300;
     }
   }
}