Flex中如何阻止用户点击选中Tree中任何节点

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"
6. creationComplete="init();">
8. <mx:Script>
9. <![CDATA[
10. import mx.events.ListEvent;
12. private function init():void {
13. tree.openItems = dp..node;
14. }
16. private function tree_itemClick(evt:ListEvent):void {
17. var item:Object = evt.currentTarget.selectedItem;
18. var nonSelectable:Boolean = ((item.hasOwnProperty("@clickable")) && (item.(@clickable == "false")));
19. if (nonSelectable) {
20. tree.selectedItem = null;
21. }
22. }
23. ]]>
24. </mx:Script>
26. <mx:XMLid="dp">
27. <root>
28. <nodelabel="Parent 1 (X)" clickable="false">
29. <nodelabel="Child 1 (X)" clickable="false" />
30. <nodelabel="Child 2 (X)" clickable="false">
31. <nodelabel="Grandchild 1" />
32. <nodelabel="Grandchild 2" />
33. </node>
34. <nodelabel="Child 3 (X)" clickable="false" />
35. <nodelabel="Child 4" />
36. </node>
37. </root>
38. </mx:XML>
40. <mx:Treeid="tree"
41. dataProvider="{dp}"
42. showRoot="false"
43. labelField="@label"
44. width="200"
45. itemClick="tree_itemClick(event);"/>
47. </mx:Application>