设置NumericStepper组件圆角半径.

cornerRadius样式学习.
示例：

代码：

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/05/13/setting-the-corner-radius-on-a-numericstepper-control-in-flex/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:Script>
        <![CDATA[
            private function init():void {
                slider.value = numericStepper.getStyle("cornerRadius");
            }
        ]]>
    </mx:Script>

    <mx:ApplicationControlBar dock="true">
        <mx:Form styleName="plain">
            <mx:FormItem label="cornerRadius:">
                <mx:HSlider id="slider"
                        minimum="0"
                        maximum="10"
                        liveDragging="true"
                        snapInterval="1"
                        tickInterval="1" />
            </mx:FormItem>
        </mx:Form>
    </mx:ApplicationControlBar>

    <mx:NumericStepper id="numericStepper"
            cornerRadius="{slider.value}"
            initialize="init();" />

</mx:Application>