128 lines
5.2 KiB
C#
128 lines
5.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Linq;
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using System.Text;
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namespace ryControls
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{
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/// <summary>
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/// 建立圆角路径的样式。
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/// </summary>
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public enum RoundStyle
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{
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/// <summary>
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/// 四个角都不是圆角。
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/// </summary>
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None = 0,
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/// <summary>
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/// 四个角都为圆角。
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/// </summary>
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All = 1,
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/// <summary>
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/// 左边两个角为圆角。
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/// </summary>
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Left = 2,
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/// <summary>
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/// 右边两个角为圆角。
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/// </summary>
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Right = 3,
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/// <summary>
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/// 上边两个角为圆角。
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/// </summary>
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Top = 4,
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/// <summary>
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/// 下边两个角为圆角。
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/// </summary>
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Bottom = 5,
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/// <summary>
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/// 左下角为圆角。
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/// </summary>
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BottomLeft = 6,
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/// <summary>
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/// 右下角为圆角。
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/// </summary>
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BottomRight = 7
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}
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/// <summary>
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/// 画图相关API
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/// </summary>
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public class Drawing
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{
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/// <summary>
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/// 建立带有圆角样式的路径。
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/// </summary>
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/// <param name="rect">用来建立路径的矩形。</param>
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/// <param name="radius">圆角的大小。</param>
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/// <param name="style">圆角的样式。</param>
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/// <param name="correction">是否把矩形长宽减 1,以便画出边框。</param>
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/// <returns>建立的路径。</returns>
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public static GraphicsPath CreatePath(Rectangle rect, int radius, RoundStyle style, bool correction)
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{
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GraphicsPath path = new GraphicsPath();
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int radiusCorrection = correction ? 1 : 0;
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switch (style)
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{
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case RoundStyle.None:
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path.AddRectangle(rect);
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break;
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case RoundStyle.All:
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path.AddArc(rect.X, rect.Y, radius, radius, 180, 90);
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path.AddArc(rect.Right - radius - radiusCorrection, rect.Y, radius, radius, 270, 90);
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path.AddArc(rect.Right - radius - radiusCorrection, rect.Bottom - radius - radiusCorrection, radius, radius, 0, 90);
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path.AddArc(rect.X, rect.Bottom - radius - radiusCorrection, radius, radius, 90, 90);
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break;
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case RoundStyle.Left:
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path.AddArc(rect.X, rect.Y, radius, radius, 180, 90);
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path.AddLine(rect.Right - radiusCorrection, rect.Y, rect.Right - radiusCorrection, rect.Bottom - radiusCorrection);
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path.AddArc(rect.X, rect.Bottom - radius - radiusCorrection, radius, radius, 90, 90);
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break;
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case RoundStyle.Right:
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path.AddArc(rect.Right - radius - radiusCorrection, rect.Y, radius, radius, 270, 90);
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path.AddArc(rect.Right - radius - radiusCorrection, rect.Bottom - radius - radiusCorrection, radius, radius, 0, 90);
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path.AddLine(rect.X, rect.Bottom - radiusCorrection, rect.X, rect.Y);
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break;
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case RoundStyle.Top:
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path.AddArc(rect.X, rect.Y, radius, radius, 180, 90);
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path.AddArc(rect.Right - radius - radiusCorrection, rect.Y, radius, radius, 270, 90);
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path.AddLine(rect.Right - radiusCorrection, rect.Bottom - radiusCorrection, rect.X, rect.Bottom - radiusCorrection);
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break;
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case RoundStyle.Bottom:
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path.AddArc(rect.Right - radius - radiusCorrection, rect.Bottom - radius - radiusCorrection, radius, radius, 0, 90);
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path.AddArc(rect.X, rect.Bottom - radius - radiusCorrection, radius, radius, 90, 90);
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path.AddLine(rect.X, rect.Y, rect.Right - radiusCorrection, rect.Y);
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break;
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case RoundStyle.BottomLeft:
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path.AddArc(
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rect.X,
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rect.Bottom - radius - radiusCorrection,
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radius,
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radius,
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90,
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90);
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path.AddLine(rect.X, rect.Y, rect.Right - radiusCorrection, rect.Y);
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path.AddLine(
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rect.Right - radiusCorrection,
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rect.Y,
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rect.Right - radiusCorrection,
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rect.Bottom - radiusCorrection);
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break;
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case RoundStyle.BottomRight:
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path.AddArc(
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rect.Right - radius - radiusCorrection,
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rect.Bottom - radius - radiusCorrection,
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radius,
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radius,
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0,
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90);
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path.AddLine(rect.X, rect.Bottom - radiusCorrection, rect.X, rect.Y);
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path.AddLine(rect.X, rect.Y, rect.Right - radiusCorrection, rect.Y);
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break;
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}
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path.CloseFigure(); //这句很关键，缺少会没有左边线。
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return path;
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}
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}
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}
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