using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Drawing;

using System.Data;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Drawing.Drawing2D;

namespace JSHYSC_CtrlLib

{

    public partial class Ctrl_GroupBox : GroupBox

    {

        private Color borderLineColor =System.Drawing.SystemColors.GradientActiveCaption;

        /// <summary>

        /// 边框线颜色

        /// </summary>

        public Color BorderLineColor

        {

            get { return borderLineColor; }

            set { borderLineColor = value; }

        }

        private float borderLineWidth = 1;

        /// <summary>

        /// 边框线宽度

        /// </summary>

        public float BorderLineWidth

        {

            get { return borderLineWidth; }

            set { borderLineWidth = value; }

        }

        public Ctrl_GroupBox()

        {

            InitializeComponent();

        }

        protected override void OnPaint(PaintEventArgs e)

        {

            //base.OnPaint(e);

            e.Graphics.Clear(base.BackColor);

            //圆弧直径长度

            int radius = 20;

            int width = e.ClipRectangle.Width, height = e.ClipRectangle.Height;

            int titleStartX = 15;

            float titleWidth = e.Graphics.MeasureString(base.Text, base.Font).Width;

            float titleHeight = e.Graphics.MeasureString(base.Text, base.Font).Height;

            Pen pen = new Pen(borderLineColor, (float)borderLineWidth);

            //左上角圆弧

            e.Graphics.DrawArc(pen, new Rectangle(0, (int)(titleHeight / 2), radius, radius), 180, 90);

            //上边框，标题前半部分

            e.Graphics.DrawLine(pen, radius / 2, (titleHeight - 1) / 2, radius + titleStartX-3, (titleHeight - 1) / 2);

            //画笔

            SolidBrush brush = new SolidBrush(Color.Black);

            Font font = new System.Drawing.Font("宋体", 10, FontStyle.Bold);

            //标题

            e.Graphics.DrawString(base.Text, font, brush, radius / 2 + titleStartX, 0);

            //上边框，标题右半部分

            e.Graphics.DrawLine(pen, radius / 2 + titleStartX + titleWidth+3, (titleHeight - 1) / 2, (width - 1) - radius / 2, (titleHeight - 1) / 2);

            //右上角圆弧

            e.Graphics.DrawArc(pen, new Rectangle((width - 1) - radius, (int)(titleHeight / 2), radius, radius), 270, 90);

            //右边框

            e.Graphics.DrawLine(pen, width - 1, (int)(titleHeight / 2) + radius / 2, width - 1, (height - 1) - radius / 2);

            //右下角圆弧

            e.Graphics.DrawArc(pen, new Rectangle((width - 1) - radius, (height - 1) - radius, radius, radius), 0, 90);

            //下边框

            e.Graphics.DrawLine(pen, (width - 1) - radius / 2, height - 1, radius / 2, height - 1);

            //左下角圆弧

            e.Graphics.DrawArc(pen, new Rectangle(0, (height - 1) - radius, radius, radius), 90, 90);

            //左边框

            e.Graphics.DrawLine(pen, 0, (height - 1) - radius / 2, 0, (int)(titleHeight / 2) + radius / 2);

        }

    }

}