Flex 4中Spark组件利用Skin Class外观设计(1)

Flex 4 默认为Spark主题，Spark组件的外观设计与之前相比也变得更简单高效。

Spark组件都不包含可视外观属性，所有这类信息都包含在外观文件SkinClass中。

SkinClass借助 FXG和状态语法完成组件的交互式设计，其使用MXML编写新的外观文件。

在组件中则通过skinClass属性来应用相关外观文件，如：<s:Button label="myButton"?skinClass="myButtonSkin"/>。

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以下是本人写的一个简单的ButtonSkinClass：

<?xml version="1.0" encoding="utf-8"?>

<s:Skin xmlns:fx="http://ns.adobe.com/mxml/2009"?

xmlns:s="library://ns.adobe.com/flex/spark"?

xmlns:mx="library://ns.adobe.com/flex/mx"

alpha.disabled="0.7">

<s:states>

<s:State name="up"/>

<s:State name="over"/>

<s:State name="down"/>

<s:State name="disabled"/>

</s:states>

<s:filters>

<s:DropShadowFilter alpha="0.5" distance="1.2" quality="2" excludeFrom="down"/>

</s:filters>

<s:Rect id="myMain" radiusX="4" radiusY="4" top="0" right="0" bottom="0" left="0">

<s:fill>

<s:SolidColor color="0x5bc1e9" color.over="0xcfc851" color.down="0xb19600"/>

</s:fill>

<s:stroke>

<s:SolidColorStroke color="0x001fa4" weight="1"/>

</s:stroke>

</s:Rect>

<s:Rect id="myTop" radiusX="4" radiusY="4" top="1" right="1" left="1" height="50%">

<s:fill>

<s:LinearGradient rotation="90">

<s:GradientEntry color="0xFFFFFF" alpha="0.7"/>

<s:GradientEntry color="0xFFFFFF" alpha="0.2"/>

</s:LinearGradient>

</s:fill>

</s:Rect>

<s:Label text="myButton" verticalCenter="2" horizontalCenter="0" ?textAlign="center" fontWeight="bold"?color="0x131313" color.over="0x0150ad" color.down="0x0150ad"/>

</s:Skin>

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效果如下图：

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zhuan zi :http://flex4jiaocheng.com/blog/267