flex 改变右键菜单

本文引用：http://hi.baidu.com/178link/blog/item/3e0471a843556eb5cb130c97.html

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
creationComplete="init()" >
<mx:Script>
   <![CDATA[
      

import flash.display.Sprite;
     import flash.ui.ContextMenu;
     import flash.ui.ContextMenuItem;
     import flash.events.ContextMenuEvent;
     //在全局上，定义三个栏目
     private var menu1:ContextMenuItem;
     private var menu2:ContextMenuItem;
     private var menu3:ContextMenuItem;
     //初始化开始了
     public function init():void{
     textSelect.text = "RightClick is Default";
     menu1= new ContextMenuItem("Draw Red");
     menu2 = new ContextMenuItem("Draw Yellow");
     menu3 = new ContextMenuItem("Default");
     //让这三个栏目监听点事件
     menu1.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT,menudraw);
     menu2.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT,menudraw);
     menu3.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT,menudraw);
    
     //这个就是把那些事件全部加到一起,放在ContextMenu上
     var MyMenu:ContextMenu = new ContextMenu();
     MyMenu.hideBuiltInItems();
     MyMenu.customItems.push(menu1);
     MyMenu.customItems.push(menu2);
     MyMenu.customItems.push(menu3);
//这个是定义那个部位来监听,如果你定义了一个实例,想要你的实例监听你的右键,那么把this 改为你的实例名字
//这个是整个舞台的监听.
     this.contextMenu = MyMenu;
     }
     //选择选择到了右键栏目，改干点啥
     private function menudraw(e:ContextMenuEvent):void {
        switch (e.target) {
         case menu1 :
           textSelect.text = "RightClick IS READ";
           break;
         case menu2 :
           textSelect.text = "RightClick IS Yellow";
           break;
         case menu3 :
           textSelect.text = "RightClick is Default";
           break;
       }
     }
         
   ]]>
</mx:Script>
<mx:Label x="97" y="60" id="textSelect" text="Test Right-Click"/>
</mx:Application>