Flex Gumbo中如何通过textAlpha样式，设置TextGraphic透明度

main.mxml

1. <?xml version="1.0" encoding="utf-8"?>
2. <FxApplicationname="TextGraphic_textAlpha_test"
3. xmlns="http://ns.adobe.com/mxml/2009">
4. <layout>
5. <BasicLayout/>
6. </layout>
8. <Style>
9. @font-face {
10. src: url("assets/ARIAL.TTF");
11. fontFamily: "ArialEmbedded";
12. cff: true;
13. }
15. TextGraphic {
16. fontSize: 24;
17. }
18. </Style>
20. <HGroupleft="10" top="10">
21. <Labeltext="textAlpha:" />
22. <FxHSliderid="slider"
23. minimum="0.0"
24. maximum="1.0"
25. value="1.0"
26. stepSize="0.1"
27. valueInterval="0.1"
28. liveDragging="true"/>
29. </HGroup>
31. <Formid="form"
32. horizontalCenter="0"
33. verticalCenter="0">
34. <FormItemlabel="device:">
35. <Graphic>
36. <TextGraphicid="deviceTextGraphic"
37. textAlpha="{slider.value}"
38. fontFamily="Arial"
39. fontLookup="device"
40. width="300">
41. <text>The quick brown fox jumped over the lazy dog.</text>
42. </TextGraphic>
43. </Graphic>
44. </FormItem>
45. <FormItemlabel="embeddedCFF:">
46. <Graphic>
47. <TextGraphicid="embeddedTextGraphic"
48. textAlpha="{slider.value}"
49. fontFamily="ArialEmbedded"
50. fontLookup="embeddedCFF"
51. width="300">
52. <text>The quick brown fox jumped over the lazy dog.</text>
53. </TextGraphic>
54. </Graphic>
55. </FormItem>
56. </Form>
58. </FxApplication>