Flex中如何通过useRollOver样式，设置Tree项目在鼠标移在上面时高亮显示与否

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:XMLid="treeDP">
8. <root>
9. <nodelabel="i) One" />
10. <nodelabel="i) Two" />
11. <nodelabel="i) Three" />
12. <nodelabel="i) Four">
13. <nodelabel="ii) One" />
14. <nodelabel="ii) Two" />
15. <nodelabel="ii) Three">
16. <nodelabel="iii) One" />
17. <nodelabel="iii) Two" />
18. </node>
19. <nodelabel="ii) Four" />
20. </node>
21. <nodelabel="i) Five" />
22. <nodelabel="i) Six" />
23. </root>
24. </mx:XML>
26. <mx:ApplicationControlBardock="true">
27. <mx:CheckBoxid="checkBox"
28. label="useRollOver:"
29. labelPlacement="left"
30. selected="true"/>
31. </mx:ApplicationControlBar>
33. <mx:Treeid="tree"
34. dataProvider="{treeDP}"
35. labelField="@label"
36. showRoot="false"
37. useRollOver="{checkBox.selected}"
38. width="200"/>
40. </mx:Application>