WPF入门(三)->几何图形之不规则图形(PathGeometry) (2)

原文:WPF入门(三)->几何图形之不规则图形(PathGeometry) (2)

上一节我们介绍了PathGeometry中LineSegment是点与点之间绘制的一条直线，那么我们这一节来看一下点与点之间绘制曲线ArcSegment

先来看一段代码

<Window x:Class="WPF.SimpleGraph.PathFill.Window1"        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        Title="Window1" Height="300" Width="300">    <Canvas>        <Path Stroke="DarkGray" StrokeThickness="2">            <Path.Data>                <PathGeometry>                    <PathFigure StartPoint="40,40" IsClosed="True">                        <LineSegment Point="40,130"></LineSegment>                        <ArcSegment Point="60,150" Size="20,20" ></ArcSegment>                        <LineSegment Point="200,150"></LineSegment>                        <ArcSegment Point="220,130" Size="20,20"></ArcSegment>                        <LineSegment Point="220,40"></LineSegment>                        <ArcSegment Point="200,20" Size="20,20"></ArcSegment>                        <LineSegment Point="60,20"></LineSegment>                        <ArcSegment Point="40,40" Size="20,20"></ArcSegment>                    </PathFigure>                </PathGeometry>            </Path.Data>        </Path>    </Canvas></Window>

执行结果：

其中ArcSegment表示一条点到点之间的曲线

例如该代码它

<PathFigure StartPoint="40,40" IsClosed="False">                        <ArcSegment Point="40,80" Size="20,20" ></ArcSegment>                    </PathFigure>

它的效果是从点(40,40)到点(40,80)之间绘制一条曲线

ArcSegment的Size属性表示该曲线的弧度及形状，详细弧度与值的关系请查考msdn

<LineSegment Point="40,130"></LineSegment><ArcSegment Point="60,150" Size="20,20" ></ArcSegment>

该代码表示画一条从StartPoint到40,130的直线，再从40,130到60,150的曲线

依次类推，我们便可画出一个弧形角的矩形。