C#-利用自定义控件绘制一个箭头控件

usingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Text;
usingSystem.Threading.Tasks;
usingSystem.Windows;
usingSystem.Windows.Controls;
usingSystem.Windows.Data;
usingSystem.Windows.Documents;
usingSystem.Windows.Input;
usingSystem.Windows.Media;
usingSystem.Windows.Media.Imaging;
usingSystem.Windows.Navigation;
usingSystem.Windows.Shapes;
namespaceDemo.CustomControl{
/// <summary>/// 按照步骤 1a 或 1b 操作，然后执行步骤 2 以在 XAML 文件中使用此自定义控件。////// 步骤 1a) 在当前项目中存在的 XAML 文件中使用该自定义控件。/// 将此 XmlNamespace 特性添加到要使用该特性的标记文件的根/// 元素中://////     xmlns:MyNamespace="clr-namespace:Demo.CustomControl"///////// 步骤 1b) 在其他项目中存在的 XAML 文件中使用该自定义控件。/// 将此 XmlNamespace 特性添加到要使用该特性的标记文件的根/// 元素中://////     xmlns:MyNamespace="clr-namespace:Demo.CustomControl;assembly=Demo.CustomControl"////// 您还需要添加一个从 XAML 文件所在的项目到此项目的项目引用，/// 并重新生成以避免编译错误://////     在解决方案资源管理器中右击目标项目，然后依次单击///     “添加引用”->“项目”->[浏览查找并选择此项目]///////// 步骤 2)/// 继续操作并在 XAML 文件中使用控件。//////     <MyNamespace:Arrow/>////// </summary>publicclassArrow : Control    {
staticArrow()
        {
DefaultStyleKeyProperty.OverrideMetadata(typeof(Arrow), newFrameworkPropertyMetadata(typeof(Arrow)));
        }
/// <summary>/// 箭头颜色/// </summary>privateSolidColorBrushm_ArrowColor;
publicSolidColorBrushArrowColor        {
get            {
returnm_ArrowColor;
            }
set            {
m_ArrowColor=value;
            }
        }
/// <summary>/// 箭头边框颜色/// </summary>privateSolidColorBrushm_ArrowBorderColor;
publicSolidColorBrushArrowBorderColor        {
get            {
returnm_ArrowBorderColor;
            }
set            {
m_ArrowBorderColor=value;
            }
        }
/// <summary>/// 箭头边框宽度/// </summary>publicdoublem_ArrowBorder=0;
publicdoubleArrowBorder        {
get            {
returnm_ArrowBorder;
            }
set            {
m_ArrowBorder=value;
            }
        }
protectedoverridevoidOnRender(DrawingContextdrawingContext)
        {
drawingContext.DrawGeometry(ArrowColor, newPen(ArrowBorderColor, 1), ArrowDraw());
        }
privateStreamGeometryArrowDraw() 
        {
StreamGeometrystreamGeometry=newStreamGeometry();
varpoint0=newPoint(this.ActualWidth/3,0);
varpoint1=newPoint(this.ActualWidth/3*2, 0);
varpoint2=newPoint(this.ActualWidth/3*2, this.ActualHeight/3*2);
varpoint3=newPoint(this.ActualWidth, this.ActualHeight/3*2);
varpoint4=newPoint(this.ActualWidth/2, this.ActualHeight);
varpoint5=newPoint(0, this.ActualHeight/3*2);
varpoint6=newPoint(this.ActualWidth/3,this.ActualHeight/3*2);
using (StreamGeometryContextstreamGeometryContext=streamGeometry.Open()) 
            {
streamGeometryContext.BeginFigure(point0,true,false);
streamGeometryContext.LineTo(point1, true, true);
streamGeometryContext.LineTo(point2, true, true);
streamGeometryContext.LineTo(point3, true, true);
streamGeometryContext.LineTo(point4, true, true);
streamGeometryContext.LineTo(point5, true, true);
streamGeometryContext.LineTo(point6, true, true);
streamGeometryContext.LineTo(point0, true, true);
            }
returnstreamGeometry;
        }
    }
}