flex自定义右键菜单

<?xml version="1.0" encoding="utf-8"?><s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"    xmlns:s="library://ns.adobe.com/flex/spark"    xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"   applicationComplete="onCreateComplete()"   ><fx:Declarations><!-- Place non-visual elements (e.g., services, value objects) here --></fx:Declarations><fx:Script><![CDATA[import mx.controls.Alert;import mx.events.CloseEvent;private function onCreateComplete():void {var item_1:ContextMenuItem = new ContextMenuItem("下面是自定义选项",true,false);var item_2:ContextMenuItem = new ContextMenuItem("java",true);var item_3:ContextMenuItem = new ContextMenuItem("flex",true);var item_4:ContextMenuItem = new ContextMenuItem("oracle");var myContextMenu:ContextMenu = new ContextMenu();myContextMenu.hideBuiltInItems();myContextMenu.customItems.push(item_1);myContextMenu.customItems.push(item_2);myContextMenu.customItems.push(item_3);myContextMenu.customItems.push(item_4);myContextMenu.addEventListener("menuSelect",menuHandler);item_1.addEventListener("menuItemSelect",itemHandler);item_2.addEventListener("menuItemSelect",itemHandler);item_3.addEventListener("menuItemSelect",itemHandler);item_4.addEventListener("menuItemSelect",itemHandler);this.contextMenu = myContextMenu;}private function menuHandler(event:ContextMenuEvent):void {//Alert.show("右键菜单弹出...");}private function itemHandler(event:ContextMenuEvent):void {Alert.yesLabel = "确定";Alert.cancelLabel = "取消";Alert.show(event.target.caption,"标题",Alert.YES|Alert.CANCEL,this,myClickHandler);}private function myClickHandler(event:CloseEvent):void {switch(event.detail) {case Alert.YES :Alert.show("你点击了确定！！");break;case Alert.CANCEL :Alert.show("你点击了取消！！");break;}}]]></fx:Script></s:Application>