[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>