flex渐变色制作圆角橙色按钮

<?xml version="1.0" encoding="utf-8"?><s:SparkButtonSkin xmlns:fx="http://ns.adobe.com/mxml/2009"              xmlns:s="library://ns.adobe.com/flex/spark"              xmlns:fb="http://ns.adobe.com/flashbuilder/2009"             minWidth="42" minHeight="30"              alpha.disabled="0.5">         <fx:Metadata>        <![CDATA[         /**          * @copy spark.skins.spark.ApplicationSkin#hostComponent         */        [HostComponent("spark.components.Button")]        ]]>    </fx:Metadata>        <!-- states -->    <s:states>        <s:State name="up" />        <s:State name="over" />        <s:State name="down" />        <s:State name="disabled" />    </s:states>        <s:Rect left="0" right="0" top="0" bottom="0" topLeftRadiusX="7" topRightRadiusX="7"bottomLeftRadiusX="7" bottomRightRadiusX="7">        <s:stroke><s:SolidColorStroke color.up="0xfaa51a"/></s:stroke><s:fill><s:LinearGradient rotation="0"><s:entries><s:GradientEntry color="0xfaa51a"/><s:GradientEntry color="0xf47a20" ratio=".5"/></s:entries></s:LinearGradient><!--<s:RadialGradient rotation="0"><s:entries><s:GradientEntry color="0xF0FFFF" ratio=".7"/><s:GradientEntry color="0xFF83FA"/></s:entries></s:RadialGradient>--></s:fill></s:Rect>        <!-- layer 8: text -->    <!--- @copy spark.components.supportClasses.ButtonBase#labelDisplay  -->    <s:Label id="labelDisplay"             textAlign="center"             maxDisplayedLines="1" fontSize="20"             horizontalCenter="0" verticalCenter="1" verticalAlign="middle"             left="10" right="10" top="2" bottom="2" color.up="0xffffff">    </s:Label>    </s:SparkButtonSkin>