Flex中如何在用户按住TextArea滚动条(横竖方向)拖动时显示ToolTips

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. private function textArea_scrollTipFunc(direction:String, position:Number):String {
10. var str:String;
11. switch (direction) {
12. case "horizontal":
13. str = position + "/" + textArea.maxHorizontalScrollPosition;
14. break;
15. case "vertical":
16. str = position + "/" + textArea.maxVerticalScrollPosition;
17. break;
18. }
19. return str;
20. }
21. ]]>
22. </mx:Script>
24. <mx:Stringid="lorem" source="lorem.txt" />
26. <mx:ApplicationControlBardock="true">
27. <mx:FormstyleName="plain">
28. <mx:FormItemlabel="showScrollTips:">
29. <mx:CheckBoxid="checkBox" selected="true" />
30. </mx:FormItem>
31. </mx:Form>
32. </mx:ApplicationControlBar>
34. <mx:TextAreaid="textArea"
35. text="{lorem}"wordWrap="false"
36. showScrollTips="{checkBox.selected}"
37. scrollTipFunction="textArea_scrollTipFunc"
38. width="100%"
39. height="100%"/>
41. </mx:Application>