RollMarking/JinYuan.ControlLib/CustomGroupBox.cs

using AntdUI.Theme;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing.Drawing2D;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using AntdUI;

namespace JinYuan.ControlLib
{
    public partial class CustomGroupBox : GroupBox
    {
        private Color darkBorderColor = Color.FromArgb(64, 64, 64);
        private Color lightBorderColor = Color.FromArgb(217, 217, 217);
        private Color darkForeColor = Color.White;
        private Color lightForeColor = Color.Black;
        private const int TextPadding = 4;

        public Color BorderColor { get; set; } = Color.Gray;
       

        private float _borderWidth = 1f;
        private float _cornerRadius = 5f;

        [Category("Appearance")]
        [DefaultValue(1f)]
        public float BorderWidth
        {
            get => _borderWidth;
            set
            {
                _borderWidth = value;
                Invalidate();
            }
        }

        [Category("Appearance")]
        [DefaultValue(5f)]
        public float CornerRadius
        {
            get => _cornerRadius;
            set
            {
                _cornerRadius = value;
                Invalidate();
            }
        }

        public CustomGroupBox()
        {
            SetStyle(ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer, true);
            UpdateTheme(Config.IsDark);
            
        }

       

        public void UpdateTheme(bool isDark)
        {
            ForeColor = isDark ? darkForeColor : lightForeColor;
            Invalidate();
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            var g = e.Graphics;
            g.SmoothingMode = SmoothingMode.AntiAlias;

            var borderColor = Config.IsDark ? darkBorderColor : lightBorderColor;
            var textSize = g.MeasureString(Text, Font);
            var textWidth = (int)Math.Ceiling(textSize.Width) + TextPadding * 2;
            var textHeight = (int)Math.Ceiling(textSize.Height);

            var textRect = new Rectangle(TextPadding, 0, textWidth, textHeight);
            var borderRect = new Rectangle((int)(_borderWidth / 2), textHeight / 2,
                                           Width - 1 - (int)_borderWidth, Height - textHeight / 2 - 1 - (int)_borderWidth);

            //绘制边框颜色
            using (var pen = new Pen(BorderColor, BorderWidth))
            {
                e.Graphics.DrawRectangle(pen, 0, 0, Width - BorderWidth, Height - BorderWidth);
            }

            // 绘制背景
            using (var brush = new SolidBrush(BackColor))
            {
                g.FillRectangle(brush, ClientRectangle);
            }

            // 创建圆角矩形路径
            using (var path = GetRoundedRectanglePath(borderRect, _cornerRadius))
            {
                // 绘制边框
                using (var pen = new Pen(borderColor, _borderWidth))
                {
                    g.DrawPath(pen, path);
                }
            }

            // 绘制标题文本背景
            using (var brush = new SolidBrush(BackColor))
            {
                g.FillRectangle(brush, textRect);
            }

            // 绘制标题文本
            using (var brush = new SolidBrush(ForeColor))
            {
                g.DrawString(Text, Font, brush, textRect, new StringFormat { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center });
            }
        }

        private GraphicsPath GetRoundedRectanglePath(Rectangle rect, float radius)
        {
            GraphicsPath path = new GraphicsPath();
            float diameter = radius * 2;
            RectangleF arcRect = new RectangleF(rect.Location, new SizeF(diameter, diameter));

            // 左上角
            path.AddArc(arcRect, 180, 90);

            // 顶边
            arcRect.X = rect.Right - diameter;
            path.AddArc(arcRect, 270, 90);

            // 右边
            arcRect.Y = rect.Bottom - diameter;
            path.AddArc(arcRect, 0, 90);

            // 底边
            arcRect.X = rect.Left;
            path.AddArc(arcRect, 90, 90);

            path.CloseFigure();
            return path;
        }
    }
}