flex3 load flashpaper使用LocalConnection和flash通讯

package com.magReader    
{    
   
    import flash.events.Event;    
    import flash.events.StatusEvent;    
    import flash.net.LocalConnection;    
//import flash.system.System;    
   
    import mx.controls.SWFLoader;    
   
    /** 
      * UIComponent designed specifically to load FlashPaper documents 
      * and size them correctly in the available area. 
      */   
    public class FlashPaperLoader extends SWFLoader    
     {    
   
        /** 
          * The id of the FlashPaperLoader.swf proxy that will be used 
          * for communication pyurposes. 
          */   
        public static const FLASH_PAPER_LOADED   : String = "flashPaperLoaded";    
        public static const FLASH_CONNERROR      : String = "flashConnError";    
        private var sendFlashConn:LocalConnection;    
        private var recieveFlashConn:LocalConnection;    
        /** 
          * The name of the application that is loading in the FlashPaperLoader.swf 
          * file.   This name must correspond to the "id" attribute in the object tag 
          * and the "name" attribute in the embed tag when the Flex client is embedded 
          * into the html page. 
          */   
   
        /** 
          * Constructor 
          */   
        public function FlashPaperLoader()    
         {    
            //source = "app-storage:/data/fpHolder.swf";    
             sendFlashConn=new LocalConnection();    
             recieveFlashConn = new LocalConnection();    
             recieveFlashConn.client=this;    
             sendFlashConn.addEventListener(StatusEvent.STATUS, onStatus);    
             sendFlashConn.allowDomain("*");    
             recieveFlashConn.allowDomain("*");    
             sendConn();    
         }    
        public function sendConn():void   
         {    
            try   
             {    
                 recieveFlashConn.connect("_flexloader");    
             } catch (error:ArgumentError) {    
                 trace("Can't connect...the connection name is already being used by another SWF");    
                 onConnError();    
                return;    
             }    
         }    
   
        private function onStatus(result:StatusEvent) :void{    
   
             trace (result.level == "error"?"Operation failed":"Operation succeeded");    
   
         }    
        //连接源出错    
        private function onConnError():void   
         {    
            //errUnload();    
   
             var e:Event=new Event(FlashPaperLoader.FLASH_CONNERROR);    
             dispatchEvent( e );    
         }    
   
        // =================================================================    
        //   Expose methods that are proxied from FlashPaperLoader.swf - Call    
        //   JavaScript methods that the FlashPaperLoader.swf file picks up    
        //   and passes to the loaded FlashPaper document.    
        // =================================================================    
   
        public function setSize( width:Number, height:Number ):void   
         {    
             trace("=========setPaperSize=============");    
             sendFlashConn.send("_flashpaperloader","setPaperSize",width,height);    
         }    
        /** 
          * 文档加载成功提示 
          * */   
        public function fpLoaded():void   
         {    
             trace("reveice fpLoaded message!! this.width = " + this.width + " this.height" + this.height);    
            //setSize(parent.width,parent.height);    
             var e:Event=new Event(FlashPaperLoader.FLASH_PAPER_LOADED);    
             dispatchEvent( e );    
            //this.visible=true;    
         }    
        /** 
          * 设置缩放 
          * */   
        public function setZoom(value:Object):void   
         {    
            if (this.visible)    
             {    
                 sendFlashConn.send("_flashpaperloader","setCurrentZoom",value);    
             }    
         }    
   
//   override protected function updateDisplayList( unscaledWidth:Number,    
//                                                  unscaledHeight:Number ):void    
//   {    
//       if ( contentHolder )    
//       {    
//           // Adjust values so the FlashPaper document is displayed correctly    
//           contentHolder.scaleX = 1.0;    
//           contentHolder.scaleY = 1.0;    
//           contentHolder.x = 0;    
//           contentHolder.y = 0;    
//      
//           contentHolder.scrollRect = new Rectangle( 0, 0, unscaledWidth, unscaledHeight );    
//      
//           // When the content has loaded, call the setSize method so that the    
//           // FlashPaper document sizes right in the available area    
//           if ( Loader( contentHolder ).content )    
//           {    
//               setSize( unscaledWidth, unscaledHeight );    
//               //this.setFocus();    
//           }    
//       }    
//   }    
   
        //卸载此swf    
        public function unload():void   
         {    
            if(sendFlashConn != null)    
             {    
                 sendFlashConn.send("_flashpaperloader","unload");    
                 sendFlashConn = null;    
             }    
            try   
             {    
                if(recieveFlashConn != null)    
                 {    
                     recieveFlashConn.close();    
                     recieveFlashConn = null;    
                 }    
             }catch(e:ArgumentError)    
             {    
                 trace(e.toString());    
                 recieveFlashConn = null;    
             }    
   
             unloadAndStop(true);    
            //System.gc();    
         }    
        public function errUnload():void   
         {    
            if(sendFlashConn != null)    
             {    
                 sendFlashConn.send("_flashpaperloader","unload");    
                 sendFlashConn = null;    
             }    
            if(recieveFlashConn != null) recieveFlashConn = null;    
             unloadAndStop(true);    
            //System.gc();    
         }    
   
     } // end class    
} // end package