CustomLineCap Clase

Definición

public ref class CustomLineCap : MarshalByRefObject, ICloneable, IDisposable

public class CustomLineCap : MarshalByRefObject, ICloneable, IDisposable

type CustomLineCap = class
    inherit MarshalByRefObject
    interface ICloneable
    interface IDisposable

Public Class CustomLineCap
Inherits MarshalByRefObject
Implements ICloneable, IDisposable

Herencia

Object

MarshalByRefObject

CustomLineCap

Derivado

System.Drawing.Drawing2D.AdjustableArrowCap

Implementaciones

ICloneable IDisposable

Ejemplos

En el ejemplo siguiente se muestra cómo usar la CustomLineCap clase . Para ejecutar este ejemplo, pegue el código en un formulario Windows. Controle el evento del Paint formulario y llame DrawCaps desde el método de control de eventos del Paint formulario, pasando e como PaintEventArgs.

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

Comentarios

Los límites de línea se usan al principio y los extremos de las líneas o curvas dibujadas por objetos GDI+ Pen . GDI+ admite varios estilos de límite predefinidos y también permite a los usuarios definir sus propios estilos de límite. Esta clase se usa para crear estilos de límite personalizados.