flex tree 添加右键菜单

<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" fontSize="12"> <mx:Script> <!--[CDATA[ import mx.controls.Alert; public var newBuildMenuItem:ContextMenuItem;//菜单项变量 private function init(): void//初始化函数 { createTreeMenuItem(); tree.contextMenu = getTreeContxtMenu(); } public function createTreeMenuItem(): void//菜单项创建函数，并添加菜单监听器 { newBuildMenuItem = new ContextMenuItem("新建"); newBuildMenuItem.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT, newBuildHandler2); } private function getTreeContxtMenu(): ContextMenu//将菜单项目添加到菜单中 { var contextMenu: ContextMenu = new ContextMenu(); contextMenu.hideBuiltInItems(); contextMenu.customItems.push(newBuildMenuItem); return contextMenu; } public function newBuildHandler2(event:Event):void//点击菜单执行函数 { Alert.show("这是新建的菜单点击后执行的函数"); } ]]--> </mx:Script> <mx:Tree id="tree" x="31" y="10" creationComplete="init()"></mx:Tree> </mx:Application>

为tree添加右键菜单，也可为其他任何控件添加，但暂时没法去除右键自带的菜单项，虽然网上有办法去掉，但是感觉麻烦，大家又好办法提出来啊