Flex 4中如何设置Spark SimpleText背景颜色 ？？

Question

Flex 4中如何设置Spark SimpleText背景颜色 ？？ 希望清楚一点的回答

Answer 1

<?xml version="1.0" encoding="utf-8"?>
<s:Application name="Spark_SimpleText_backgroundAlpha_test"
        xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark"
        xmlns:mx="library://ns.adobe.com/flex/halo">
 
    <mx:ApplicationControlBar width="100%" cornerRadius="0">
        <mx:Form styleName="plain">
            <mx:FormItem label="backgroundColor:">
                <mx:ColorPicker id="colorPicker"
                        selectedColor="white" />
            </mx:FormItem>
            <mx:FormItem label="backgroundAlpha:">
                <s:HSlider id="slider"
                        minimum="0.0"
                        maximum="1.0"
                        value="1.0" 
                        stepSize="0.1" 
                        snapInterval="0.1" 
                        liveDragging="true" />
            </mx:FormItem>
        </mx:Form>
    </mx:ApplicationControlBar>
 
    <s:SimpleText id="smplTxt"
            backgroundAlpha="{slider.value}"
            backgroundColor="{colorPicker.selectedColor}"
            maxWidth="500"
            horizontalCenter="0"
            verticalCenter="0">
        <fx:String source="lorem.txt" />
    </s:SimpleText>
 
</s:Application>