Flex中通过focusAlpha样式设置NumericStepper控件获取光标时透明度的例子

接下来的例子演示了Flex中如何通过focusAlpha样式，设置NumericStepper控件获取光标时透明度。Demo中点击“click here to remove focus”按钮移除光标，上下按钮调整透明度。

让我们先来看一下Demo（

可以右键View Source或点击这里察看源代码

）

：
下面是完整代码(或点击这里查看)：
Download: main.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="middle"
backgroundColor="white">

<mx:Script>
<![CDATA[
import mx.events.NumericStepperEvent;

private function numericStepper_change(evt:NumericStepperEvent):void {
// reset focus
focusManager.setFocus(btn);
focusManager.setFocus(numericStepper);
}
]]>
</mx:Script>

<mx:ApplicationControlBar dock="true">
<mx:Button id="btn" label="click here to remove focus" />
</mx:ApplicationControlBar>

<mx:NumericStepper id="numericStepper"
minimum="0.0"
maximum="1.0"
value="0.5"
stepSize="0.1"
textAlign="center"
focusAlpha="{numericStepper.value}"
change="numericStepper_change(event);" />

</mx:Application>