Flex创建弹出菜单(PopUpButton/Menu/PopMenuButton)

弹出菜单的运行Flash效果见：http://tongqiuyan.blog.163.com/blog/static/1955453022011922113758634/

静态图片：

<?xml version="1.0" encoding="utf-8"?>
mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" fontSize="12">
<mx:Script>
 <![CDATA[
  import mx.controls.Menu;
  private var menu:Menu;
  private function init():void
  {
   menu = new Menu();
   menu.labelField = "@label";
   // 设置menu的数据源
   menu.dataProvider = xmlDP;
   //设置menu不要展现父子排列结构
   menu.showRoot = false;
   menu.width = popUpButton.width;
   // 设置弹出的内容为menu
   popUpButton.popUp = menu;
  }
 ]]>
</mx:Script>
<mx:Style>
popUpButtonStyle{fontWeight:normal; textAlign:left;}
</mx:Style>
<mx:XML id="xmlDP">
 <root>
  <node label="菜单项1" />
  <node label="菜单项2" enabled="false" />
  <node type="separator" />
  <node label="父项" enabled="false">
   <node label="子项1" />
  </node>
  <node label="父项">
   <node label="子项1" />
   <node label="子项2" />
   <node label="子项3" />
  </node>
  <node type="separator" />
  <node label="type=check" type="check" toogled="true" />
  <node label="type=check(disabled)" type="check" toogled="true" enabled="false" />
  <node type="separator" />
  <node label="1) type=Radio" type="radio" groupName="radioGroup" toggled="true" />
  <node label="2) type=Radio" type="radio" groupName="radioGroup" />
  <node label="3) type=Radio" type="radio" groupName="radioGroup" />
  <node label="4) type=Radio(disabled)" type="radio" groupName="radioGroup" enabled="false" />
 </root>
</mx:XML>
<mx:Panel title="创建弹出菜单" width="300" height="200" horizontalAlign="center" paddingTop="10">
 <mx:PopUpButton id="popUpButton" label="选择菜单中的项" creationComplete="init();" width="200" popUpStyleName="popUpButtonStyle" />
</mx:Panel>
/mx:Application>