cyf
38 lines
1.2 KiB
C#
38 lines
1.2 KiB
C#
using System.ComponentModel;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Windows.Forms;
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using System.Windows.Forms.Design;
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namespace Lskj.Control.ImageLibrary
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{
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/// <summary>
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/// 绘制虚线边框
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/// </summary>
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[Description("绘制虚线边框")]
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public class DottedLineBorderExtDesigner : ControlDesigner
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{
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protected override void OnPaintAdornments(PaintEventArgs pe)
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{
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base.OnPaintAdornments(pe);
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this.DrawBorder(pe.Graphics);
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}
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/// <summary>
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/// 绘制虚线边框
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/// </summary>
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/// <param name="graphics"></param>
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private void DrawBorder(Graphics graphics)
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{
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System.Windows.Forms.Control control = this.Control;
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Rectangle clientRectangle = control.ClientRectangle;
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Pen pen = new Pen((double)control.BackColor.GetBrightness() >= 0.5 ? ControlPaint.Dark(control.BackColor) : ControlPaint.Light(control.BackColor));
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pen.DashStyle = DashStyle.Dash;
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--clientRectangle.Width;
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--clientRectangle.Height;
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graphics.DrawRectangle(pen, clientRectangle);
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pen.Dispose();
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}
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}
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}
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