这可能有三角形的图片框而不是矩形的吗? [英] Is this possible to have triangular PictureBox instead of the rectangular one?

问题描述

这是否可以在 Windows 窗体中使用三角形 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

你有一些选择，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内绘制.

示例 1

在本例中，控制区域仅限于三角形.

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，仅在控件的三角形区域上进行绘制.

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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