skinClass中绘制多边形使用Path标签,把绘制路径放在data属性里。
如:<s:Path data="M0 0L10 10Z"/>
在编写绘制路径时,会用到一些控制关链字,这是必须了解的。
M(x,y):移动到点(x,y)。
Z:结束并关闭路径(路径最后的点会画一条直线到路径起启点)。
L(x,y):画一条直线到点(x,y)(一般和M一起使用,见下面例子)。
C(x1,y1,x,y,x2,y2):从(x1,y1)画一条弧线到(x2,y2),(x,y)为弧度控制点(|x1-x|=弧y轴半径,|y-y2|=弧x轴半径,当弧y轴半径=弧x轴半径时,此弧为圆弧)。
以下是一个简单的例子,绘制的都是一些基础图形,复杂图形也都是由基础图形构成的:
<? 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" > < fx:Metadata > [HostComponent("spark.components.SkinnableContainer")] </ fx:Metadata > < fx:Script > <![CDATA[ import mx.graphics.SolidColorStroke; [Bindable] private var stroke:SolidColorStroke = new SolidColorStroke(0xfff000, 2); ]]> </ fx:Script > < s:states > < s:State name ="normal" /> < s:State name ="disabled" /> </ s:states > < s:HGroup gap ="50" > < s:VGroup > <!-- 横线 --> < s:Path data ="M0 0L60 0Z" stroke =" {stroke} " /><!-- 竖线 --> < s:Path data ="M0 0L0 60Z" stroke =" {stroke} " /><!-- 右45度斜线 --> < s:Path data ="M0 0L60 60Z" stroke =" {stroke} " /><!-- 左45度斜线 --> < s:Path data ="M0 60L60 0Z" stroke =" {stroke} " /><!-- 虚线 --> < s:Path data ="M0 0L10 0Z M20 0L30 0Z M40 0L50 0Z M60 0L70 0Z" stroke =" {stroke} " /><!-- 1/4圆弧 --> < s:Path data ="C0 0 0 60 60 60" stroke =" {stroke} " /> </ s:VGroup > < s:VGroup > <!-- 正方形 --> < s:Path data ="M0 0 60 0 60 60 0 60Z" stroke =" {stroke} " /><!-- 三角形 --> < s:Path data ="M0 0 60 0 30 40Z" stroke =" {stroke} " /><!-- 半圆形 --> < s:Path data ="C0 0 0 30 30 30 30 30 60 30 60 0Z" stroke =" {stroke} " /><!-- 叶形 --> < s:Path data ="Q0 0 0 30 30 30 30 30 60 30 60 0 60 -30 30 -30 0 -30 0 0" stroke =" {stroke} " /><!-- 五角星 --> < s:Path data ="M31.0376 1.17676L40.3076 20.9272 61.0376 24.0947 46.0376 39.4683 49.5786 61.1768 31.0376 50.9272 12.4966 61.1768 16.0376 39.4683 1.0376 24.0947 21.7676 20.9272 31.0376 1.17676Z" stroke =" {stroke} " /> </ s:VGroup > </ s:HGroup > </ s:Skin >