/*
 * 本代码受中华人民共和国著作权法保护,作者仅授权下载代码之人在学习和交流范围内
 * 自由使用与修改代码;欲将代码用于商业用途的,请与作者联系。
 * 使用本代码请保留此处信息。作者联系方式:ping3108@163.com, 欢迎进行技术交流
 */

using ICSharpCode.WinFormsUI.Controls;
using System;
using System.Drawing;
using System.Drawing.Drawing2D;

namespace ICSharpCode.WinFormsUI.NGraphics
{
 /// <summary>
 /// 提供产生各种路径的静态方法,比如圆角路径、关闭按钮上的x路径、+号路径
 /// </summary>
 internal static class GraphicsPathHelper
 {
 /// <summary>
 /// 画圆角矩形
 /// </summary>
 /// <param name="rect"></param>
 /// <param name="cornerRadius"></param>
 /// <returns></returns>
 public static GraphicsPath CreateRoundedRectPath(Rectangle rect, int radius, RoundStyle type, bool shorten)
 {
 GraphicsPath roundedRect = new GraphicsPath();
 roundedRect.AddArc(rect.X, rect.Y, radius * 2, radius * 2, 180, 90);
 roundedRect.AddLine(rect.X + radius, rect.Y, rect.Right - radius * 2, rect.Y);
 roundedRect.AddArc(rect.X + rect.Width - radius * 2, rect.Y, radius * 2, radius * 2, 270, 90);
 roundedRect.AddLine(rect.Right, rect.Y + radius * 2, rect.Right, rect.Y + rect.Height - radius * 2);
 roundedRect.AddArc(rect.X + rect.Width - radius * 2, rect.Y + rect.Height - radius * 2, radius * 2, radius * 2, 0, 90);
 roundedRect.AddLine(rect.Right - radius * 2, rect.Bottom, rect.X + radius * 2, rect.Bottom);
 roundedRect.AddArc(rect.X, rect.Bottom - radius * 2, radius * 2, radius * 2, 90, 90);
 roundedRect.AddLine(rect.X, rect.Bottom - radius * 2, rect.X, rect.Y + radius * 2);
 roundedRect.CloseFigure();
 return roundedRect;
 } 

 public static GraphicsPath CreateRoundedRect(Rectangle rect, int radius, RoundStyle type, bool shorten)
 {
 GraphicsPath path = new GraphicsPath();

 if (shorten)
 {
 rect.Width--;
 rect.Height--;
 }

 Rectangle rectTopLeft = new Rectangle(rect.X, rect.Y, radius, radius);
 Rectangle rectTopRight = new Rectangle(rect.Right - radius, rect.Y, radius, radius);
 Rectangle rectBottomLeft = new Rectangle(rect.X, rect.Bottom - radius, radius, radius);
 Rectangle rectBottomRight = new Rectangle(rect.Right - radius, rect.Bottom - radius, radius, radius);
 Point p1 = new Point(rect.X, rect.Y);
 Point p2 = new Point(rect.Right, rect.Y);
 Point p3 = new Point(rect.Right, rect.Bottom);
 Point p4 = new Point(rect.X, rect.Bottom);

 switch (type)
 {
 case RoundStyle.None:
 path.AddRectangle(rect);
 break;
 case RoundStyle.All:
 path.AddArc(rectTopLeft, 180, 90);
 path.AddArc(rectTopRight, 270, 90);
 path.AddArc(rectBottomRight, 0, 90);
 path.AddArc(rectBottomLeft, 90, 90);
 break;
 case RoundStyle.Top:
 path.AddArc(rectTopLeft, 180, 90);
 path.AddArc(rectTopRight, 270, 90);
 path.AddLine(p3, p4);
 break;
 case RoundStyle.Bottom:
 path.AddArc(rectBottomRight, 0, 90);
 path.AddArc(rectBottomLeft, 90, 90);
 path.AddLine(p1, p2);
 break;
 case RoundStyle.Left:
 path.AddArc(rectBottomLeft, 90, 90);
 path.AddArc(rectTopLeft, 180, 90);
 path.AddLine(p2, p3);
 break;
 case RoundStyle.Right:
 path.AddArc(rectTopRight, 270, 90);
 path.AddArc(rectBottomRight, 0, 90);
 path.AddLine(p4, p1);
 break;
 default:
 break;
 }
 path.CloseFigure(); 
 return path;
 }

 public static GraphicsPath CreateMinimizeFlagPath(Rectangle rect)
 {
 GraphicsPath path = new GraphicsPath();
 int x = rect.X + (rect.Width - 9) / 2;
 int y = rect.Y + (rect.Height - 7) / 2;
 Point p1 = new Point(x + 1, y + 5);
 Point p2 = new Point(x + 7, y + 5);
 Point p3 = new Point(x + 1, y + 6);
 Point p4 = new Point(x + 7, y + 6);
 path.AddLines(new Point[] { p1, p2, p3, p4 }); 
 return path;
 }

 public static GraphicsPath CreateMaximizeFlagPath(Rectangle rect)
 {
 GraphicsPath path = new GraphicsPath();
 int x = rect.X + (rect.Width - 9) / 2;
 int y = rect.Y + (rect.Height - 7) / 2;
 Point p1 = new Point(x + 1, y + 1);
 Point p2 = new Point(x + 7, y + 1);
 path.AddRectangle(new Rectangle(new Point(x, y), new Size(8, 6)));
 path.CloseFigure();
 path.AddLine(p1, p2);
 return path;
 }

 public static GraphicsPath CreateRestoreFlagPath(Rectangle rect)
 {
 GraphicsPath path = new GraphicsPath();
 int x = rect.X + (rect.Width - 11) / 2;
 int y = rect.Y + (rect.Height - 9) / 2;

 Point p1 = new Point(x, y + 3);
 Point p2 = new Point(x + 6, y + 3);
 Point p3 = new Point(x + 6, y + 4);
 Point p4 = new Point(x + 6, y + 8);
 Point p5 = new Point(x, y + 8);
 Point p6 = new Point(x, y + 4);

 Point p7 = new Point(x + 7, y + 5);
 Point p8 = new Point(x + 9, y + 5);
 Point p9 = new Point(x + 9, y + 1);
 Point p10 = new Point(x + 3, y + 1);
 Point p11 = new Point(x + 3, y + 2);
 Point p12 = new Point(x + 3, y);
 Point p13 = new Point(x + 9, y);

 path.AddLines(new Point[] { p1, p2, p4, p5, p6, p3, p2, p1 });
 path.CloseFigure();

 path.AddLines(new Point[] { p7, p8, p9, p10, p11, p12, p13, p8, p7 });
 return path;
 }

 public static GraphicsPath CreateCloseFlagPath(Rectangle rect)
 {
 GraphicsPath path = new GraphicsPath();

 int x = rect.X + (rect.Width - 9) / 2;
 int y = rect.Y + (rect.Height - 7) / 2;

 Point p1 = new Point(x + 1-1, y-1);
 Point p2 = new Point(x + 7, y + 6);
 Point p3 = new Point(x + 8, y + 6);
 Point p4 = new Point(x + 2-1, y-1);

 Point p5 = new Point(x + 6+1, y-1);
 Point p6 = new Point(x, y + 6);
 Point p7 = new Point(x + 1, y + 6);
 Point p8 = new Point(x + 7+1, y-1);

 path.AddLine(p1, p2);
 path.AddLine(p3, p4);
 path.CloseFigure();
 path.AddLine(p5, p6);
 path.AddLine(p7, p8);

 return path;
 }

 public static GraphicsPath CreateTopRoundedPathForFormRegion(Rectangle rect)
 {
 GraphicsPath path = new GraphicsPath();

 Point pBL = new Point(rect.X, rect.Bottom); // bottom left
 Point pBR = new Point(rect.Right, rect.Bottom); // bottom right

 int x = rect.X, y = rect.Y, r = rect.Right;
 Point p1 = new Point(x, y + 4);
 Point p2 = new Point(x + 1, y + 4);
 Point p3 = new Point(x + 1, y + 2);
 Point p4 = new Point(x + 2, y + 2);
 Point p5 = new Point(x + 2, y + 1);
 Point p6 = new Point(x + 4, y + 1);
 Point p7 = new Point(x + 4, y);

 Point p8 = new Point(r - 4, y);
 Point p9 = new Point(r - 4, y + 1);
 Point p10 = new Point(r - 2, y + 1);
 Point p11 = new Point(r - 2, y + 2);
 Point p12 = new Point(r - 1, y + 2);
 Point p13 = new Point(r - 1, y + 4);
 Point p14 = new Point(r, y + 4);

 path.AddLines(new Point[] { p1, p2, p3, p4, p5, p6, p7 });
 path.AddLines(new Point[] { p8, p9, p10, p11, p12, p13, p14 });
 path.AddLine(pBR, pBL);

 path.CloseFigure();
 return path;
 }

 public static GraphicsPath CreateSingleLineCloseFlag(Rectangle rect, int width)
 {
 GraphicsPath path = new GraphicsPath();

 int x = rect.X + (rect.Width - width) / 2;
 int y = rect.Y + (rect.Height - width) / 2;

 Point p1 = new Point(x, y);
 Point p2 = new Point(x + width, y);
 Point p3 = new Point(x + width, y + width);
 Point p4 = new Point(x, y + width);

 path.AddLine(p1, p3);
 path.CloseFigure();
 path.AddLine(p2, p4);

 return path;
 }

 public static GraphicsPath CreateSingleLineCloseFlag(Rectangle rect)
 {
 return CreateSingleLineCloseFlag(rect, 6);
 }

 public static GraphicsPath CreatePlusFlag(Rectangle rect, int width)
 {
 GraphicsPath path = new GraphicsPath();

 if (width % 2 == 1)
 width++;

 int x = rect.X + (rect.Width - width) / 2;
 int y = rect.Y + (rect.Height - width) / 2;

 Point p1 = new Point(x + width / 2 - 1, y);
 Point p2 = new Point(x + width / 2 - 1, y + width - 1);
 Point p3 = new Point(x + width / 2, y + width - 1);
 Point p4 = new Point(x + width / 2, y);

 Point p5 = new Point(x, y + width / 2 - 1);
 Point p6 = new Point(x + width - 1, y + width / 2 - 1);
 Point p7 = new Point(x + width - 1, y + width / 2);
 Point p8 = new Point(x, y + width / 2);

 path.AddLines(new Point[] { p1, p2, p3, p4 });
 path.CloseFigure();
 path.AddLines(new Point[] { p5, p6, p7, p8 });

 return path;
 }

 public static GraphicsPath CreatePlusFlag(Rectangle rect)
 {
 return CreatePlusFlag(rect, 10);
 }

 public static GraphicsPath CreateDownTriangleFlag(Rectangle rect)
 {
 GraphicsPath path = new GraphicsPath();

 int x = rect.X + (rect.Width - 10) / 2;
 int y = rect.Y + (rect.Height - 9) / 2;

 if (rect.Height % 2 == 0)
 y++;

 Point p1 = new Point(x, y);
 Point p2 = new Point(x + 9, y);
 Point p3 = new Point(x + 9, y + 1);
 Point p4 = new Point(x, y + 1);

 path.AddLines(new Point[] { p1, p2, p3, p4 });
 path.CloseFigure();

 int x1 = x, y1 = y + 4, x2 = x + 9, y2 = y + 4;
 for (int i = 1; i <= 5; i++)
 {
 if (i % 2 == 0)
 path.AddLine(x2, y2, x1, y1);
 else
 path.AddLine(x1, y1, x2, y2);
 x1++;
 x2--;
 y1++;
 y2++;
 }

 return path;
 }
 }
}