flex air拖盘代码

<?xml version="1.0" encoding="utf-8"?>
    <mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml"
     creationComplete="initApplication()"
     close="closingApplication(event)">
      <mx:Script>
       <![CDATA[
        import mx.events.CloseEvent;
        import mx.controls.Alert;
        private var dockImage:BitmapData;
        
        public function initApplication():void{  

                var loader:Loader=new Loader();  

                loader.contentLoaderInfo.addEventListener(Event.COMPLETE,prepareForSystray);//这里就是完成第一步的任务须,这个prepareForSystray就是对托盘的生在和菜单的控制  
    try
    {
                loader.load(new URLRequest("assets/images/i_servicearea.png"));//这里先要加载托盘图标的小图片  
    }catch(e:Error){
     Alert.show(e.message);
    }
                this.addEventListener(Event.CLOSING,closingApplication);//设置关闭体的事件  

            }  

              

        //关闭窗体的事件  

            public function closingApplication(event:Event):void{  

                event.preventDefault();//阻止默认的事件  

                Alert.yesLabel="Close";  

                Alert.noLabel="Mini";  

                Alert.show("Close or Minimize?", "Close?", 3, this, alertCloseHandler);//弹出自定义的选择框, 关于Alert的详细用法,参考官方文档或我前面的相关文章.  

            }  

        //根据用户的选择来判断做什么,这里选择是就是关闭,选择否(Mini)就是最小化到托盘.  

        private function alertCloseHandler(event:CloseEvent):void{  

            if(event.detail==Alert.YES){  

                closeApp(event);  

            }else{  

                dock();//最小化到托盘  

            }  

        }  

          

    //生成托盘  

        public function prepareForSystray(event:Event):void{  

            dockImage=event.target.content.bitmapData;  

            if(NativeApplication.supportsSystemTrayIcon){  

                setSystemTrayProperties();//设置托盘菜单的事件  

                SystemTrayIcon(NativeApplication.nativeApplication.icon).menu=createSystrayRootMenu();//生成托盘菜单  

            }     

        }  

          

        public function createSystrayRootMenu():NativeMenu{  

            var menu:NativeMenu = new NativeMenu();  

            var openNativeMenuItem:NativeMenuItem = new NativeMenuItem("打开");//生成OPEN菜单项  

            var exitNativeMenuItem:NativeMenuItem = new NativeMenuItem("退出");//同理  

            openNativeMenuItem.addEventListener(Event.SELECT, undock);  

            exitNativeMenuItem.addEventListener(Event.SELECT, closeApp);//添加EXIT菜单项事件  

            menu.addItem(openNativeMenuItem);  

            menu.addItem(new NativeMenuItem("",true));//separator   

            menu.addItem(exitNativeMenuItem);//将菜单项加入菜单  

 

            return menu;  

 

        }  

        //设置托盘图标的事件  

        private function setSystemTrayProperties():void{  

            SystemTrayIcon(NativeApplication.nativeApplication .icon).tooltip = "测试托盘";  

            SystemTrayIcon(NativeApplication.nativeApplication .icon).addEventListener(MouseEvent.CLICK, undock);  

            stage.nativeWindow.addEventListener(NativeWindowDisplayStateEvent.DISPLAY_STATE_CHANGING, nwMinimized);   

        }  

          

//最小化窗体  

        private function nwMinimized(displayStateEvent:NativeWindowDisplayStateEvent):void {  

            if(displayStateEvent.afterDisplayState == NativeWindowDisplayState.MINIMIZED) {  

                displayStateEvent.preventDefault();//阻止系统默认的关闭窗体事件  

                dock();//将程序放入托盘  

            }  

        }  

 

        //将本地应用程序放到托盘  

        public function dock():void {  

            stage.nativeWindow.visible = false; //设置本地程序窗体不可见  

            NativeApplication.nativeApplication.icon.bitmaps = [dockImage];//设置托盘的图标  

        }  

          

        //激活程序窗体  

        public function undock(evt:Event):void {  

        stage.nativeWindow.visible = true;//设置本地程序窗体可见  

        stage.nativeWindow.orderToFront();//设置本地程序窗体到最前端  

        NativeApplication.nativeApplication .icon.bitmaps = [];//将托盘图标清空  

        }  

          

        //关闭程序窗体  

        private function closeApp(evt:Event):void {  

            stage.nativeWindow.close();  

        }  

       ]]>
      </mx:Script>
        <mx:HDividedBox height="100%" width="100%">
        <mx:FileSystemTree id="tree"
            width="200" height="100%"
            directory="{new flash.filesystem.File('C:\\')}"
            enumerationMode="directoriesOnly"
            change="dataGrid.directory = File(tree.selectedItem);"/>   
        <mx:FileSystemDataGrid id="dataGrid"
            width="100%" height="100%"
            directory="{new  flash.filesystem.File('C:\\')}"/>
        </mx:HDividedBox>
    </mx:WindowedApplication>