using System; using System.Collections.Generic; using System.ComponentModel; using System.Diagnostics; using System.Text; using System.Windows.Forms; using System.Drawing; using System.Drawing.Drawing2D; namespace scyGroupBox {     public partial class scyGroupBox : GroupBox     {         private GraphicsPath gpRegion = null;         private bool _mouseHover = false;         private bool _mouseDown = false;         private int textHeight = 0;  //文本高度         public scyGroupBox()         {             InitializeComponent();             BackColor = Color.YellowGreen;             gpRegion = CreateRadiusRect(this.ClientRectangle, radius);             if (gpRegion != null)             {                 this.Region = new Region(gpRegion);             }             this.SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.DoubleBuffer | ControlStyles.UserPaint, true);         }         #region 圆角大小 Property         private int radius = 3;         public int Radius         {             get             {                 return radius;             }             set             {                 if (value < 0)                 {                     return;                 }                 else                 {                     radius = value;                 }             }         }         #endregion         #region 边线颜色         private Color borderColor = Color.DarkGreen;         public Color BorderColor         {             get { return borderColor; }             set { borderColor = value; }         }         #endregion         #region 上部渐变颜色         private Color uShineColor = Color.FromArgb(140, Color.White);         public Color UShineColor         {             get { return uShineColor; }             set { uShineColor = value; }         }         #endregion         /// 
         /// 描绘具有圆角的button原型路径         /// 
         protected virtual GraphicsPath CreateRadiusRect(Rectangle rectangle, int radius)         {             GraphicsPath path = new GraphicsPath();             int l = rectangle.Left;  //左边             int t = rectangle.Top; //上边             int w = rectangle.Width; //宽度             int h = rectangle.Height;// 高度             int d = radius / 2; //除以2，得到半径             path.AddArc(l,t,d,d,180,90);  //左上角             path.AddLine(l + radius, t, l + w - radius, t);//上边线             path.AddArc(l + w - d, t, d, d, 270, 90);//右上角             path.AddLine(l + w, t + radius, l + w, t + h - radius); //右边线             path.AddArc(l + w - d, t + h - d, d, d, 0, 90);//右下角             path.AddLine(l + w - radius, t + h, l + radius, t + h); //下边线             path.AddArc(l, t + h - d, d, d, 90, 90); //左下角             path.AddLine(l, t + h - radius, l, t + radius); //左边线             path.CloseFigure();             return path;         }         protected override void OnSizeChanged(EventArgs e)         {             gpRegion = CreateRadiusRect(this.ClientRectangle, radius);             if (gpRegion != null)             {                 this.Region = new Region(gpRegion);             }             base.OnSizeChanged(e);         }         //按照button路径进行border绘制         protected virtual void DrawBorder(Graphics g, Pen pen)         {             if (gpRegion != null)             {                 g.SmoothingMode = SmoothingMode.HighQuality;                  g.InterpolationMode = InterpolationMode.HighQualityBicubic;                 g.DrawPath(pen, CreateRadiusRect(new Rectangle(this.ClientRectangle.Left, this.ClientRectangle.Top, this.ClientRectangle.Width - 1, this.ClientRectangle.Height - 1), radius));                 g.SmoothingMode = SmoothingMode.Default;                 g.InterpolationMode = InterpolationMode.Default;             }             pen.Dispose();             pen = null;         }         //绘制上部渐变色         protected virtual void DrawUpperShine(Graphics g)         {             Color c1 = Color.FromArgb(200,uShineColor);             Color c2 = Color.FromArgb(100,Color.White);             Rectangle rc = new Rectangle(this.ClientRectangle.Left, this.ClientRectangle.Top, Width - 1, Height / 2);             if (_mouseDown)             {                 rc = new Rectangle(this.ClientRectangle.Left, this.ClientRectangle.Top, Width - 1, (Height - 10) / 2);             }             using (LinearGradientBrush lbrush = new LinearGradientBrush(rc, c1, c2, LinearGradientMode.Vertical))             {                 g.FillRectangle(lbrush,rc);             }         }         //设置字体的大小，宽高，位置信息         protected virtual void DrawText(Graphics g)         {             if (!String.IsNullOrEmpty(this.Text.Trim()))             {                 int x = 0;                 int y = 0;                 int w = 0;                 int h = 0;                 Size size = g.MeasureString(Text, Font).ToSize();                 w = size.Width > Width ? Width : size.Width;                 h = size.Height > Height ? Height : size.Height;                 Pen pen = new Pen(ForeColor);                 g.DrawString(Text, Font, pen.Brush, new RectangleF((float)x + 10, (float)y + 3, (float)w + 3, (float)h));                 pen.Dispose();                 pen = null;                 textHeight = w;             }         }         //绘制内部的方块         protected virtual void DrawInner(Graphics g, Rectangle rectangle, Pen p)         {             int l = rectangle.Left; //左边             int t = rectangle.Top;//上边             int w = rectangle.Width;//宽度             int h = rectangle.Height;//高度             g.DrawLine(p, l + 10, t + 20, l + w - 10, t + 20);//上边线             g.DrawLine(p, l + w - 10, t + 20, l + w - 10, t + h - 10);  //右边线             g.DrawLine(p, l + w - 10, t + h - 10, l + 10, t + h - 10);  //下边线             g.DrawLine(p, l + 10, t + h - 10, l + 10, t + 20); //左边线             Rectangle r = new Rectangle(l + 10, t + 20, w - 18, h - 28);             g.FillRectangle(new SolidBrush(Color.Wheat), r);         }         protected override void OnPaint(PaintEventArgs e)         {             Pen pen = new Pen(borderColor);             Brush brush = new SolidBrush(BackColor);             e.Graphics.FillPath(brush, gpRegion);             DrawText(e.Graphics);             DrawBorder(e.Graphics,pen);             DrawInner(e.Graphics,this.ClientRectangle,new Pen(Color.Red));             DrawUpperShine(e.Graphics);         }     } }