Flex中如何通过itemClick事件，阻止用户点击选中Tree的某一分支节点

main.mxml

1. <?xml version="1.0" encoding="utf-8"?>
2. <mx:Applicationxmlns:mx="http://www.adobe.com/2006/mxml"
3. layout="vertical"
4. verticalAlign="middle"
5. backgroundColor="white">
7. <mx:Script>
8. <![CDATA[
9. import mx.events.ListEvent;
11. private function tree_itemClick(evt:ListEvent):void {
12. var item:Object = evt.currentTarget.selectedItem
13. if (tree.dataDescriptor.isBranch(item)) {
14. tree.selectedItem = null;
15. }
16. }
17. ]]>
18. </mx:Script>
20. <mx:XMLid="dp">
21. <root>
22. <nodelabel="Parent 1">
23. <nodelabel="Child 1" />
24. <nodelabel="Child 2">
25. <nodelabel="Grandchild 1" />
26. <nodelabel="Grandchild 2" />
27. </node>
28. <nodelabel="Child 3" />
29. <nodelabel="Child 4" />
30. </node>
31. </root>
32. </mx:XML>
34. <mx:Treeid="tree"
35. dataProvider="{dp}"
36. showRoot="false"
37. labelField="@label"
38. width="200"
39. itemClick="tree_itemClick(event);"/>
41. </mx:Application>