Util/DrawHelper.cs

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using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;

namespace Util
{
    public class DrawHelper
    {
        /// <summary>
        /// 画圆角矩形
        /// </summary>
        /// <param name="g"></param>
        /// <param name="pen"></param>
        /// <param name="rect"></param>
        /// <param name="cornerRadius"></param>
        public static void DrawRoundRectangle(Graphics g, Pen pen, Rectangle rect, int cornerRadius)
        {
            using (GraphicsPath path = CreateRoundedRectanglePath(rect, cornerRadius))
            {
                g.DrawPath(pen, path);
            }
        }
        public static void FillRoundRectangle(Graphics g, Brush brush, Rectangle rect, int cornerRadius)
        {
            using (GraphicsPath path = CreateRoundedRectanglePath(rect, cornerRadius))
            {
                g.FillPath(brush, path);
            }
        }

        /// <summary>
        /// 画圆角矩形
        /// </summary>
        /// <param name="g"></param>
        /// <param name="pen"></param>
        /// <param name="rect"></param>
        /// <param name="cornerRadius"></param>
        public static void DrawHalfRoundRectangle(Graphics g, Pen pen, Rectangle rect, int cornerRadius)
        {
            using (GraphicsPath path = CreateHalfRoundedRectanglePath(rect, cornerRadius))
            {
                g.DrawPath(pen, path);
            }
        }
        public static void FillHalfRoundRectangle(Graphics g, Brush brush, Rectangle rect, int cornerRadius)
        {
            using (GraphicsPath path = CreateHalfRoundedRectanglePath(rect, cornerRadius))
            {
                g.FillPath(brush, path);
            }
        }

        internal static GraphicsPath CreateRoundedRectanglePath(Rectangle rect, int cornerRadius)
        {
            GraphicsPath roundedRect = new GraphicsPath();
            roundedRect.AddArc(rect.X, rect.Y, cornerRadius * 2, cornerRadius * 2, 180, 90);
            roundedRect.AddLine(rect.X + cornerRadius, rect.Y, rect.Right - cornerRadius * 2, rect.Y);