CustomLineCap.SetStrokeCaps(LineCap, LineCap) 方法

定义

命名空间:

System.Drawing.Drawing2D

程序集:

System.Drawing.Common.dll

包:

System.Drawing.Common v8.0.0

Source:

CustomLineCap.cs

设置用于构成此自定义线帽的起始直线和结束直线的线帽。

public:
 void SetStrokeCaps(System::Drawing::Drawing2D::LineCap startCap, System::Drawing::Drawing2D::LineCap endCap);

public void SetStrokeCaps (System.Drawing.Drawing2D.LineCap startCap, System.Drawing.Drawing2D.LineCap endCap);

member this.SetStrokeCaps : System.Drawing.Drawing2D.LineCap * System.Drawing.Drawing2D.LineCap -> unit

Public Sub SetStrokeCaps (startCap As LineCap, endCap As LineCap)

参数

startCap

LineCap

此线帽内直线开始处所用的 LineCap 枚举。

endCap

LineCap

此线帽内直线结尾处所用的 LineCap 枚举。

示例

下面的示例演示如何使用 SetStrokeCaps 方法。 若要运行此示例，请将代码粘贴到 Windows 窗体中。 处理窗体的 Paint 事件，并从窗体的事件Paint处理方法调用 DrawCaps ，并e作为 PaintEventArgs传递。

protected void DrawCaps(PaintEventArgs e)
{
    GraphicsPath hPath = new GraphicsPath();

    // Create the outline for our custom end cap.
    hPath.AddLine(new Point(0, 0), new Point(0, 5));
    hPath.AddLine(new Point(0, 5), new Point(5, 1));
    hPath.AddLine(new Point(5, 1), new Point(3, 1));

    // Construct the hook-shaped end cap.
    CustomLineCap HookCap = new CustomLineCap(null, hPath);

    // Set the start cap and end cap of the HookCap to be rounded.
    HookCap.SetStrokeCaps(LineCap.Round, LineCap.Round);

    // Create a pen and set end custom start and end
    // caps to the hook cap.
    Pen customCapPen = new Pen(Color.Black, 5);
    customCapPen.CustomStartCap = HookCap;
    customCapPen.CustomEndCap = HookCap;

    // Create a second pen using the start and end caps from
    // the hook cap.
    Pen capPen = new Pen(Color.Red, 10);
    LineCap startCap;
    LineCap endCap;
    HookCap.GetStrokeCaps(out startCap, out endCap);
    capPen.StartCap = startCap;
    capPen.EndCap = endCap;

    // Create a line to draw.
    Point[] points = { new Point(100, 100), new Point(200, 50), 
        new Point(250, 300) };

    // Draw the lines.
    e.Graphics.DrawLines(capPen, points);
    e.Graphics.DrawLines(customCapPen, points);
}

Protected Sub DrawCaps(ByVal e As PaintEventArgs)
    Dim hPath As New GraphicsPath()

    ' Create the outline for our custom end cap.
    hPath.AddLine(New Point(0, 0), New Point(0, 5))
    hPath.AddLine(New Point(0, 5), New Point(5, 1))
    hPath.AddLine(New Point(5, 1), New Point(3, 1))

    ' Construct the hook-shaped end cap.
    Dim HookCap As New CustomLineCap(Nothing, hPath)

    ' Set the start cap and end cap of the HookCap to be rounded.
    HookCap.SetStrokeCaps(LineCap.Round, LineCap.Round)

    ' Create a pen and set end custom start and end
    ' caps to the hook cap.
    Dim customCapPen As New Pen(Color.Black, 5)
    customCapPen.CustomStartCap = HookCap
    customCapPen.CustomEndCap = HookCap

    ' Create a second pen using the start and end caps from
    ' the hook cap.
    Dim capPen As New Pen(Color.Red, 10)
    Dim startCap As LineCap
    Dim endCap As LineCap
    HookCap.GetStrokeCaps(startCap, endCap)
    capPen.StartCap = startCap
    capPen.EndCap = endCap

    ' Create a line to draw.
    Dim points As Point() = {New Point(100, 100), New Point(200, 50), _
        New Point(250, 300)}

    ' Draw the lines.
    e.Graphics.DrawLines(capPen, points)
    e.Graphics.DrawLines(customCapPen, points)

End Sub