[Flex] 组件Tree系列 —— 阻止用户点击选中Tree中任何节点

mxml:

<?xml version="1.0" encoding="utf-8"?>
<!--功能描述：阻止用户点击选中Tree中任何节点-->
<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"
      backgroundColor="0xffffff" creationComplete="application1_creationCompleteHandler(event)">
 <fx:Script>
  <![CDATA[
   import mx.events.FlexEvent;
   import mx.events.ListEvent;
   
   protected function tree_itemClickHandler(event:ListEvent):void
   {
    var item:Object = event.currentTarget.selectedItem;
    var nonSelectable:Boolean = ((item.hasOwnProperty("@clickEnabled")) && (item.(@clickEnabled == "false")));
    if (nonSelectable) {
     tree.selectedItem = null;
    }
   }
   
   protected function application1_creationCompleteHandler(event:FlexEvent):void
   {
    tree.openItems = data.actor[0];
   }
   
  ]]>
 </fx:Script>
 <fx:Declarations>
  <!-- 将非可视元素（例如服务、值对象）放在此处 -->
  <fx:XML id="data" xmlns="">
   <data>
    <actor label="周星驰" clickEnabled="false">
     <year label="1988">
      <item label="《霹雳先锋》香港票房8916612 " clickEnabled="false"/>
      <item label="《捕风汉子》香港票房3149395 " />
      <item label="《最佳女婿》香港票房5807710 " />
     </year>
     <year label="1989">
      <item label="《龙在天涯》香港票房6809853 " clickEnabled="false"/>
      <item label="《义胆群英》香港票房7913329 " />
      <item label="《流氓差婆》香港票房5624622 " />
      <item label="《风雨同路》香港票房9335299 " />
     </year>
     <year label="1990 ">
      <item label="《望夫成龙》香港票房13703364 " />
      <item label="《咖喱辣椒》香港票房15777856 " />
      <item label="《小偷阿星》香港票房7968106 " />
      <item label="《师兄撞鬼》香港票房12128944 " clickEnabled="false"/>
      <item label="《赌圣》香港票房41326156 " />
      <item label="《无敌幸运星》香港票房18799869" />
      <item label="《江湖最后一个大佬》香港票房5495811 " />
     </year>
    </actor>
    <actor label="李连杰">
     <year label="1992">
      <item label="笑傲江湖之东方不败（1992）" clickEnabled="false" />
      <item label="黄飞鸿之二男儿当自强（1992）" />
      <item label="黄飞鸿之三狮王争霸（1992）" />
     </year>
     <year label="1993">
      <item label="方世玉Ⅱ万夫莫敌（1993）" />
      <item label="倚天屠龙记之魔教教主（1993）" />
      <item label="黄飞鸿之铁鸡斗蜈蚣（1993）" />
      <item label="太极张三丰（1993）" />
     </year>
     <year label="1994">
      <item label="新少林五祖（1994）" />
      <item label="精武英雄（1994）" />
      <item label="中南海保镖（1994） " />
      <item label="给爸爸的信（1995" />
     </year>
     <year label="1995">
      <item label="鼠胆龙威（1995）" />
      <item label="给爸爸的信（1995" />
     </year>
    </actor>
   </data>
  </fx:XML>
 </fx:Declarations>
 <mx:Tree id="tree" dataProvider="{data}" labelField="@label" showRoot="false" width="320" rowCount="8" itemClick="tree_itemClickHandler(event)"/>
</s:Application>