是否可以有三角形的PictureBox而不是矩形的PictureBox? [英] Is this possible to have triangular PictureBox instead of the rectangular one?

问题描述

是否可以在Windows窗体中使用三角PictureBox控件而不是矩形控件?

Is this possible to have triangular PictureBox control in windows forms instead of the rectangular one?

推荐答案

您有一些选择，例如:

• 您可以将控制区域设置为三角形.
• 您只能在控件的三角形区域绘画.

示例1

在此示例中，控制区域限制为三角形.

In this example, the region of control limited to a triangular shape.

public class TriangularPictureBox:PictureBox
{
    protected override void OnPaint(PaintEventArgs pe)
    {
        using (var p = new GraphicsPath())
        {
            p.AddPolygon(new Point[] {
                new Point(this.Width / 2, 0), 
                new Point(0, Height), 
                new Point(Width, Height) });

            this.Region = new Region(p);
            base.OnPaint(pe);
        }
    }
}

示例2

在此示例中，绘画将仅在控件的三角形区域上完成.

In this example, the painting will be done only on a triangular area of the control.

public class TriangularPictureBox:PictureBox
{
    protected override void OnPaint(PaintEventArgs pe)
    {
        using (var p = new GraphicsPath())
        {
            p.AddPolygon(new Point[] {
                new Point(this.Width / 2, 0), 
                new Point(0, Height), 
                new Point(Width, Height) });

            pe.Graphics.SetClip(p);
            base.OnPaint(pe);
        }
    }
}

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