using System;namespace LC.Fun{    /// <summary>Panel扩展 带圆角，颜色渐变</summary>    [System.Drawing.ToolboxBitmapAttribute(typeof(System.Windows.Forms.Panel))]    public class RoundPanel : System.Windows.Forms.Panel    {        /// <summary>渐变的方向</summary>        public enum LinearGradientMode        {            Horizontal = 0,            Vertical = 1,            ForwardDiagonal = 2,            BackwardDiagonal = 3,            None = 4        }        /// <summary>        /// 圆角的位置        /// </summary>        [FlagsAttribute()]        public enum CornerCurveMode        {            None = 0,            TopLeft = 1,            TopRight = 2,            TopLeft_TopRight = 3,            BottomLeft = 4,            TopLeft_BottomLeft = 5,            TopRight_BottomLeft = 6,            TopLeft_TopRight_BottomLeft = 7,            BottomRight = 8,            BottomRight_TopLeft = 9,            BottomRight_TopRight = 10,            BottomRight_TopLeft_TopRight = 11,            BottomRight_BottomLeft = 12,            BottomRight_TopLeft_BottomLeft = 13,            BottomRight_TopRight_BottomLeft = 14,            All = 15        }        // Fields        private System.Drawing.Color _BackColour1 = System.Drawing.SystemColors.Window;        private System.Drawing.Color _BackColour2 = System.Drawing.SystemColors.Window;        private LinearGradientMode _GradientMode = LinearGradientMode.None;        private System.Windows.Forms.BorderStyle _BorderStyle = System.Windows.Forms.BorderStyle.None;        private System.Drawing.Color _BorderColour = System.Drawing.SystemColors.WindowFrame;        private int _BorderWidth = 1;        private int _Curvature = 0;        // Properties        //   Shadow the Backcolor property so that the base class will still render with a transparent backcolor        private CornerCurveMode _CurveMode = CornerCurveMode.All;        [System.ComponentModel.DefaultValueAttribute(typeof(System.Drawing.Color), "Window"), System.ComponentModel.CategoryAttribute("自定义cx"), System.ComponentModel.DescriptionAttribute("背景色1")]        public new System.Drawing.Color BackColor        {            get            {                return this._BackColour1;            }            set            {                this._BackColour1 = value;                if (this.DesignMode == true)                {                    this.Invalidate();                }            }        }        [System.ComponentModel.DefaultValueAttribute(typeof(System.Drawing.Color), "Window"), System.ComponentModel.CategoryAttribute("自定义cx"), System.ComponentModel.DescriptionAttribute("背景色2")]        public System.Drawing.Color BackColor2        {            get            {                return this._BackColour2;            }            set            {                this._BackColour2 = value;                if (this.DesignMode == true)                {                    this.Invalidate();                }            }        }        [System.ComponentModel.DefaultValueAttribute(typeof(LinearGradientMode), "None"), System.ComponentModel.CategoryAttribute("自定义cx"), System.ComponentModel.DescriptionAttribute("颜色渐变的方向")]        public LinearGradientMode GradientMode        {            get            {                return this._GradientMode;            }            set            {                this._GradientMode = value;                if (this.DesignMode == true)                {                    this.Invalidate();                }            }        }        [System.ComponentModel.DefaultValueAttribute(typeof(System.Windows.Forms.BorderStyle), "None"), System.ComponentModel.CategoryAttribute("自定义cx"), System.ComponentModel.DescriptionAttribute("边框的样式")]        public new System.Windows.Forms.BorderStyle BorderStyle        {            get            {                return this._BorderStyle;            }            set            {                this._BorderStyle = value;                if (this.DesignMode == true)                {                    this.Invalidate();                }            }        }        [System.ComponentModel.DefaultValueAttribute(typeof(System.Drawing.Color), "WindowFrame"), System.ComponentModel.CategoryAttribute("自定义cx"), System.ComponentModel.DescriptionAttribute("边框的颜色")]        public System.Drawing.Color BorderColor        {            get            {                return this._BorderColour;            }            set            {                this._BorderColour = value;                if (this.DesignMode == true)                {                    this.Invalidate();                }            }        }        [System.ComponentModel.DefaultValueAttribute(typeof(int), "1"), System.ComponentModel.CategoryAttribute("自定义cx"), System.ComponentModel.DescriptionAttribute("边框大小")]        public int BorderWidth        {            get            {                return this._BorderWidth;            }            set            {                this._BorderWidth = value;                if (this.DesignMode == true)                {                    this.Invalidate();                }            }        }        [System.ComponentModel.DefaultValueAttribute(typeof(int), "0"), System.ComponentModel.CategoryAttribute("自定义cx"), System.ComponentModel.DescriptionAttribute("圆角大小")]        public int Curvature        {            get            {                return this._Curvature;            }            set            {                this._Curvature = value;                if (this.DesignMode == true)                {                    this.Invalidate();                }            }        }        [System.ComponentModel.DefaultValueAttribute(typeof(CornerCurveMode), "All"), System.ComponentModel.CategoryAttribute("自定义cx"), System.ComponentModel.DescriptionAttribute("圆角的位置")]        public CornerCurveMode CurveMode        {            get            {                return this._CurveMode;            }            set            {                this._CurveMode = value;                if (this.DesignMode == true)                {                    this.Invalidate();                }            }        }        private int adjustedCurve        {            get            {                int curve = 0;                if (!(this._CurveMode == CornerCurveMode.None))                {                    if (this._Curvature > (this.ClientRectangle.Width / 2))                    {                        curve = DoubleToInt(this.ClientRectangle.Width / 2);                    }                    else                    {                        curve = this._Curvature;                    }                    if (curve > (this.ClientRectangle.Height / 2))                    {                        curve = DoubleToInt(this.ClientRectangle.Height / 2);                    }                }                return curve;            }        }        public RoundPanel()            : base()        {            this.SetDefaultControlStyles();            this.customInitialisation();        }        private void SetDefaultControlStyles()        {            this.SetStyle(System.Windows.Forms.ControlStyles.DoubleBuffer, true);            this.SetStyle(System.Windows.Forms.ControlStyles.AllPaintingInWmPaint, false);            this.SetStyle(System.Windows.Forms.ControlStyles.ResizeRedraw, true);            this.SetStyle(System.Windows.Forms.ControlStyles.UserPaint, true);            this.SetStyle(System.Windows.Forms.ControlStyles.SupportsTransparentBackColor, true);        }        private void customInitialisation()        {            this.SuspendLayout();            base.BackColor = System.Drawing.Color.Transparent;            this.BorderStyle = System.Windows.Forms.BorderStyle.None;            this.ResumeLayout(false);        }        protected override void OnPaintBackground(System.Windows.Forms.PaintEventArgs pevent)        {            base.OnPaintBackground(pevent);            pevent.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;            System.Drawing.Drawing2D.GraphicsPath graphPath;            graphPath = this.GetPath();            //    Create Gradient Brush (Cannot be width or height 0)            System.Drawing.Drawing2D.LinearGradientBrush filler;            System.Drawing.Rectangle rect = this.ClientRectangle;            if (this.ClientRectangle.Width == 0)            {                rect.Width += 1;            }            if (this.ClientRectangle.Height == 0)            {                rect.Height += 1;            }            if (this._GradientMode == LinearGradientMode.None)            {                filler = new System.Drawing.Drawing2D.LinearGradientBrush(rect, this._BackColour1, this._BackColour1, System.Drawing.Drawing2D.LinearGradientMode.Vertical);            }            else            {                filler = new System.Drawing.Drawing2D.LinearGradientBrush(rect, this._BackColour1, this._BackColour2, ((System.Drawing.Drawing2D.LinearGradientMode)this._GradientMode));            }            pevent.Graphics.FillPath(filler, graphPath);            filler.Dispose();            if (this._BorderStyle == System.Windows.Forms.BorderStyle.FixedSingle)            {                System.Drawing.Pen borderPen = new System.Drawing.Pen(this._BorderColour, this._BorderWidth);                pevent.Graphics.DrawPath(borderPen, graphPath);                borderPen.Dispose();            }            else if (this._BorderStyle == System.Windows.Forms.BorderStyle.Fixed3D)            {                DrawBorder3D(pevent.Graphics, this.ClientRectangle);            }            else if (this._BorderStyle == System.Windows.Forms.BorderStyle.None)            {            }            filler.Dispose();            graphPath.Dispose();        }        protected System.Drawing.Drawing2D.GraphicsPath GetPath()        {            System.Drawing.Drawing2D.GraphicsPath graphPath = new System.Drawing.Drawing2D.GraphicsPath();            if (this._BorderStyle == System.Windows.Forms.BorderStyle.Fixed3D)            {                graphPath.AddRectangle(this.ClientRectangle);            }            else            {                try                {                    int curve = 0;                    System.Drawing.Rectangle rect = this.ClientRectangle;                    int offset = 0;                    if (this._BorderStyle == System.Windows.Forms.BorderStyle.FixedSingle)                    {                        if (this._BorderWidth > 1)                        {                            offset = DoubleToInt(this.BorderWidth / 2);                        }                        curve = this.adjustedCurve;                    }                    else if (this._BorderStyle == System.Windows.Forms.BorderStyle.Fixed3D)                    {                    }                    else if (this._BorderStyle == System.Windows.Forms.BorderStyle.None)                    {                        curve = this.adjustedCurve;                    }                    if (curve == 0)                    {                        graphPath.AddRectangle(System.Drawing.Rectangle.Inflate(rect, -offset, -offset));                    }                    else                    {                        int rectWidth = rect.Width - 1 - offset;                        int rectHeight = rect.Height - 1 - offset;                        int curveWidth = 1;                        if ((this._CurveMode & CornerCurveMode.TopRight) != 0)                        {                            curveWidth = (curve * 2);                        }                        else                        {                            curveWidth = 1;                        }                        graphPath.AddArc(rectWidth - curveWidth, offset, curveWidth, curveWidth, 270, 90);                        if ((this._CurveMode & CornerCurveMode.BottomRight) != 0)                        {                            curveWidth = (curve * 2);                        }                        else                        {                            curveWidth = 1;                        }                        graphPath.AddArc(rectWidth - curveWidth, rectHeight - curveWidth, curveWidth, curveWidth, 0, 90);                        if ((this._CurveMode & CornerCurveMode.BottomLeft) != 0)                        {                            curveWidth = (curve * 2);                        }                        else                        {                            curveWidth = 1;                        }                        graphPath.AddArc(offset, rectHeight - curveWidth, curveWidth, curveWidth, 90, 90);                        if ((this._CurveMode & CornerCurveMode.TopLeft) != 0)                        {                            curveWidth = (curve * 2);                        }                        else                        {                            curveWidth = 1;                        }                        graphPath.AddArc(offset, offset, curveWidth, curveWidth, 180, 90);                        graphPath.CloseFigure();                    }                }                catch (System.Exception)                {                    graphPath.AddRectangle(this.ClientRectangle);                }            }            return graphPath;        }        public static void DrawBorder3D(System.Drawing.Graphics graphics, System.Drawing.Rectangle rectangle)        {            graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.Default;            graphics.DrawLine(System.Drawing.SystemPens.ControlDark, rectangle.X, rectangle.Y, rectangle.Width - 1, rectangle.Y);            graphics.DrawLine(System.Drawing.SystemPens.ControlDark, rectangle.X, rectangle.Y, rectangle.X, rectangle.Height - 1);            graphics.DrawLine(System.Drawing.SystemPens.ControlDarkDark, rectangle.X + 1, rectangle.Y + 1, rectangle.Width - 1, rectangle.Y + 1);            graphics.DrawLine(System.Drawing.SystemPens.ControlDarkDark, rectangle.X + 1, rectangle.Y + 1, rectangle.X + 1, rectangle.Height - 1);            graphics.DrawLine(System.Drawing.SystemPens.ControlLight, rectangle.X + 1, rectangle.Height - 2, rectangle.Width - 2, rectangle.Height - 2);            graphics.DrawLine(System.Drawing.SystemPens.ControlLight, rectangle.Width - 2, rectangle.Y + 1, rectangle.Width - 2, rectangle.Height - 2);            graphics.DrawLine(System.Drawing.SystemPens.ControlLightLight, rectangle.X, rectangle.Height - 1, rectangle.Width - 1, rectangle.Height - 1);            graphics.DrawLine(System.Drawing.SystemPens.ControlLightLight, rectangle.Width - 1, rectangle.Y, rectangle.Width - 1, rectangle.Height - 1);        }        public static int DoubleToInt(double value)        {            return System.Decimal.ToInt32(System.Decimal.Floor(System.Decimal.Parse((value).ToString())));        }    }}