using System.Drawing;using System.Windows.Forms;using System.Drawing.Drawing2D;using System.Runtime.InteropServices;using System;using System.Drawing.Text;using System.ComponentModel;namespace ControlExs.ControlExs.CTabControl{    public class CTabControl : TabControl    {        public CTabControl()            : base()        {            SetStyles();        }        private void SetStyles()        {            base.SetStyle(                ControlStyles.UserPaint |                ControlStyles.DoubleBuffer |                ControlStyles.OptimizedDoubleBuffer |                ControlStyles.AllPaintingInWmPaint |                ControlStyles.ResizeRedraw |                ControlStyles.SupportsTransparentBackColor, true);            base.UpdateStyles();        }        private Color _backColor = Color.FromArgb(23, 169, 254);        [Browsable(true)]        [EditorBrowsable(EditorBrowsableState.Always)]        [DefaultValue(typeof(Color), "23, 169, 254")]        public override Color BackColor        {            get { return _backColor; }            set            {                _backColor = value;                base.Invalidate(true);            }        }        private Color _borderColor = Color.FromArgb(23, 169, 254);        [DefaultValue(typeof(Color), "23, 169, 254")]        [Description("TabContorl边框色")]        public Color BorderColor        {            get { return _borderColor; }            set            {                _borderColor = value;                base.Invalidate(true);            }        }        private Color _headSelectedBackColor = Color.FromArgb(23, 169, 254);        [DefaultValue(typeof(Color), "23, 169, 254")]        [Description("TabPage头部选中后的背景颜色")]        public Color HeadSelectedBackColor        {            get { return _headSelectedBackColor; }            set { _headSelectedBackColor = value; }        }        private Color _headSelectedBorderColor = Color.FromArgb(23, 169, 254);        [DefaultValue(typeof(Color), "23, 169, 254")]        [Description("TabPage头部选中后的边框颜色")]        public Color HeadSelectedBorderColor        {            get { return _headSelectedBorderColor; }            set { _headSelectedBorderColor = value; }        }        private Color _headerBackColor = Color.FromArgb(23, 169, 254);        [DefaultValue(typeof(Color), "23, 169, 254")]        [Description("TabPage头部默认边框颜色")]        public Color HeaderBackColor        {            get { return _headerBackColor; }            set { _headerBackColor = value; }        }        protected override void OnPaintBackground(PaintEventArgs pevent)        {            if (this.DesignMode == true)            {                LinearGradientBrush backBrush = new LinearGradientBrush(                            this.Bounds,                            SystemColors.ControlLightLight,                            SystemColors.ControlLight,                            LinearGradientMode.Vertical);                pevent.Graphics.FillRectangle(backBrush, this.Bounds);                backBrush.Dispose();            }            else            {                this.PaintTransparentBackground(pevent.Graphics, this.ClientRectangle);            }        }        /// 
        ///  TabContorl 背景色设置        /// 
        ///         ///         protected void PaintTransparentBackground(Graphics g, Rectangle clipRect)        {            if ((this.Parent != null))            {                clipRect.Offset(this.Location);                PaintEventArgs e = new PaintEventArgs(g, clipRect);                GraphicsState state = g.Save();                g.SmoothingMode = SmoothingMode.HighSpeed;                try                {                    g.TranslateTransform((float)-this.Location.X, (float)-this.Location.Y);                    this.InvokePaintBackground(this.Parent, e);                    this.InvokePaint(this.Parent, e);                }                finally                {                    g.Restore(state);                    clipRect.Offset(-this.Location.X, -this.Location.Y);                    //新加片段,待测试                    using (SolidBrush brush = new SolidBrush(_backColor))                    {                        clipRect.Inflate(1, 1);                        g.FillRectangle(brush, clipRect);                    }                }            }            else            {                System.Drawing.Drawing2D.LinearGradientBrush backBrush = new System.Drawing.Drawing2D.LinearGradientBrush(this.Bounds, SystemColors.ControlLightLight, SystemColors.ControlLight, System.Drawing.Drawing2D.LinearGradientMode.Vertical);                g.FillRectangle(backBrush, this.Bounds);                backBrush.Dispose();            }        }        protected override void OnPaint(PaintEventArgs e)        {            // Paint the Background             base.OnPaint(e);            this.PaintTransparentBackground(e.Graphics, this.ClientRectangle);            this.PaintAllTheTabs(e);            this.PaintTheTabPageBorder(e);            this.PaintTheSelectedTab(e);        }        private void PaintAllTheTabs(System.Windows.Forms.PaintEventArgs e)        {            if (this.TabCount > 0)            {                for (int index = 0; index < this.TabCount; index++)                {                    this.PaintTab(e, index);                }            }        }        private void PaintTab(System.Windows.Forms.PaintEventArgs e, int index)        {            GraphicsPath path = this.GetPath(index);            this.PaintTabBackground(e.Graphics, index, path);            this.PaintTabBorder(e.Graphics, index, path);            this.PaintTabText(e.Graphics, index);            this.PaintTabImage(e.Graphics, index);        }        /// 
        /// 设置选项卡头部颜色        /// 
        ///         ///         ///         private void PaintTabBackground(System.Drawing.Graphics graph, int index, System.Drawing.Drawing2D.GraphicsPath path)        {            Rectangle rect = this.GetTabRect(index);            System.Drawing.Brush buttonBrush = new System.Drawing.Drawing2D.LinearGradientBrush(rect, SystemColors.ControlLightLight, SystemColors.ControlLight, LinearGradientMode.Vertical);  //非选中时候的 TabPage 页头部背景色            //System.Drawing.Brush buttonBrush = new System.Drawing.SolidBrush(_headerBackColor);            if (index == this.SelectedIndex)            {                //buttonBrush = new System.Drawing.SolidBrush(SystemColors.ControlLightLight); // TabPage 选中时候页头部背景色                buttonBrush = new System.Drawing.SolidBrush(_headSelectedBackColor);            }            graph.FillPath(buttonBrush, path);            buttonBrush.Dispose();        }        /// 
        /// 设置选项卡头部边框色        /// 
        ///         ///         ///         private void PaintTabBorder(System.Drawing.Graphics graph, int index, System.Drawing.Drawing2D.GraphicsPath path)        {            //Pen borderPen = new Pen(SystemColors.ControlDark);            Pen borderPen = new Pen(_borderColor);// TabPage 非选中时候的 TabPage 头部边框色            if (index == this.SelectedIndex)            {                //borderPen = new Pen(ThemedColors.ToolBorder);                borderPen = new Pen(_headSelectedBorderColor); // TabPage 选中后的 TabPage 头部边框色            }            graph.DrawPath(borderPen, path);            borderPen.Dispose();        }        private void PaintTabImage(System.Drawing.Graphics g, int index)        {            Image tabImage = null;            if (this.TabPages[index].ImageIndex > -1 && this.ImageList != null)            {                tabImage = this.ImageList.Images[this.TabPages[index].ImageIndex];            }            else if (this.TabPages[index].ImageKey.Trim().Length > 0 && this.ImageList != null)            {                tabImage = this.ImageList.Images[this.TabPages[index].ImageKey];            }            if (tabImage != null)            {                Rectangle rect = this.GetTabRect(index);                g.DrawImage(tabImage, rect.Right - rect.Height - 4, 4, rect.Height - 2, rect.Height - 2);            }        }        private void PaintTabText(System.Drawing.Graphics graph, int index)        {            Rectangle rect = this.GetTabRect(index);            Rectangle rect2 = new Rectangle(rect.Left, rect.Top, rect.Width, rect.Height);            //Rectangle rect2 = new Rectangle(rect.Left + 16, rect.Top + 1, rect.Width - 6, rect.Height);            //if (index == 0)            //{            //    rect2 = new Rectangle(rect.Left + rect.Height, rect.Top + 1, rect.Width - rect.Height, rect.Height);            //}            string tabtext = this.TabPages[index].Text;            System.Drawing.StringFormat format = new System.Drawing.StringFormat();            format.Alignment = StringAlignment.Near;            format.LineAlignment = StringAlignment.Center;            format.Trimming = StringTrimming.EllipsisCharacter;            Brush forebrush = null;            if (this.TabPages[index].Enabled == false)            {                forebrush = SystemBrushes.ControlDark;            }            else            {                forebrush = SystemBrushes.ControlText;            }            Font tabFont = this.Font;            if (index == this.SelectedIndex)            {                tabFont = new Font(this.Font, FontStyle.Bold);                //if (index == 0)                //{                //    rect2 = new Rectangle(rect.Left + rect.Height, rect.Top + 1, rect.Width - rect.Height + 5, rect.Height);                //}            }            graph.DrawString(tabtext, tabFont, forebrush, rect2, format);        }        /// 
        /// 设置 TabPage 内容页边框色        /// 
        ///         private void PaintTheTabPageBorder(System.Windows.Forms.PaintEventArgs e)        {            if (this.TabCount > 0)            {                Rectangle borderRect = this.TabPages[0].Bounds;                borderRect.Inflate(1, 1);                //ControlPaint.DrawBorder(e.Graphics, borderRect, ThemedColors.ToolBorder, ButtonBorderStyle.Solid);                ControlPaint.DrawBorder(e.Graphics, borderRect, this.BorderColor, ButtonBorderStyle.Solid);            }        }        /// 
        /// // TabPage 页头部间隔色        /// 
        ///         private void PaintTheSelectedTab(System.Windows.Forms.PaintEventArgs e)        {            Rectangle selrect;            int selrectRight = 0;            switch (this.SelectedIndex)            {                case -1:                    break;                case 0:                    selrect = this.GetTabRect(this.SelectedIndex);                    selrectRight = selrect.Right;                    e.Graphics.DrawLine(SystemPens.ControlLightLight, selrect.Left + 2, selrect.Bottom + 1, selrectRight - 2, selrect.Bottom + 1);                    break;                default:                    selrect = this.GetTabRect(this.SelectedIndex);                    selrectRight = selrect.Right;                    e.Graphics.DrawLine(SystemPens.ControlLightLight, selrect.Left + 6 - selrect.Height, selrect.Bottom + 2, selrectRight - 2, selrect.Bottom + 2);                    break;            }        }        private GraphicsPath GetPath(int index)        {            System.Drawing.Drawing2D.GraphicsPath path = new System.Drawing.Drawing2D.GraphicsPath();            path.Reset();            Rectangle rect = this.GetTabRect(index);            switch (Alignment)            {                case TabAlignment.Top:                    break;                case TabAlignment.Bottom:                    break;                case TabAlignment.Left:                    break;                case TabAlignment.Right:                    break;            }            if (index == 0)            {                path.AddLine(rect.Left - 1, rect.Top + 1, rect.Left - 1, rect.Top + 1);                path.AddLine(rect.Left - 1, rect.Top + 1, rect.Right, rect.Top + 1);                path.AddLine(rect.Right, rect.Top + 1, rect.Right, rect.Bottom);                path.AddLine(rect.Right, rect.Bottom, rect.Left - 1, rect.Bottom);            }            else            {                if (index == this.SelectedIndex)                {                    path.AddLine(rect.Left - 1, rect.Top, rect.Left - 1, rect.Top);                    path.AddLine(rect.Left - 1, rect.Top, rect.Right, rect.Top);                    path.AddLine(rect.Right, rect.Top, rect.Right, rect.Bottom);                    path.AddLine(rect.Right, rect.Bottom + 1, rect.Left - 1, rect.Bottom + 1);                }                else                {                    path.AddLine(rect.Left - 1, rect.Top, rect.Left - 1, rect.Top);                    path.AddLine(rect.Left - 1, rect.Top, rect.Right, rect.Top);                    path.AddLine(rect.Right, rect.Top, rect.Right, rect.Bottom);                    path.AddLine(rect.Right, rect.Bottom + 1, rect.Left - 1, rect.Bottom + 1);                }            }            return path;        }        [DllImport("user32.dll")]        private static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);        private const int WM_SETFONT = 0x30;        private const int WM_FONTCHANGE = 0x1d;        protected override void OnCreateControl()        {            base.OnCreateControl();            this.OnFontChanged(EventArgs.Empty);        }        protected override void OnFontChanged(EventArgs e)        {            base.OnFontChanged(e);            IntPtr hFont = this.Font.ToHfont();            SendMessage(this.Handle, WM_SETFONT, hFont, (IntPtr)(-1));            SendMessage(this.Handle, WM_FONTCHANGE, IntPtr.Zero, IntPtr.Zero);            this.UpdateStyles();            //this.ItemSize = new Size(0, this.Font.Height + 2);        }    }}