c# 颜色选择控件的实现代码_C#

参考ColorComboBox做修改，并对颜色名做些修正，用于CR MVMixer产品中，聊作备忘~
效果图：
#ad11d0664be35ec8944d0ad54a1eb1cc#
代码：
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									//颜色拾取框

									using System;

									using System.ComponentModel;

									using System.Drawing;

									using System.Windows.Forms;

									namespace CRMVMixer

									{

									    //event handler delegate

									    public delegate void ColorChangedHandler(object sender, ColorChangeArgs e);

									    [ToolboxBitmap(typeof(ComboBox))]

									    public class ColorComboBox : ComboBox

									    {

									        private PopupWindow popupWnd;

									        private ColorPopup colors = new ColorPopup();

									        private Color selectedColor = Color.Black;

									        private Timer timer = new Timer();

									        public event ColorChangedHandler ColorChanged;

									        //constructor...

									        public ColorComboBox()

									            : this(Color.Black)

									        {

									        }

									        public ColorComboBox(Color selectedColor)

									        {

									            this.SuspendLayout();

									            // 

									            // ColorCombo

									            // 

									            this.AutoSize = false;

									            this.Size = new Size(92, 22);

									            this.Text = string.Empty;

									            this.DrawMode = DrawMode.OwnerDrawFixed;

									            this.DropDownStyle = ComboBoxStyle.DropDownList;

									            this.ItemHeight = 16;

									            timer.Tick += new EventHandler(OnCheckStatus);

									            timer.Interval = 50;

									            timer.Start();

									            colors.SelectedColor = this.selectedColor = selectedColor;

									            this.ResumeLayout(false);

									        }

									        [DefaultValue(typeof(Color), "Black")]

									        public Color SelectedColor

									        {

									            get { return selectedColor; }

									            set

									            {

									                selectedColor = value;

									                colors.SelectedColor = value;

									                Invalidate();

									            }

									        }

									        protected override void WndProc(ref Message m)

									        {

									            //256: WM_KEYDOWN, 513: WM_LBUTTONDOWN, 515: WM_LBUTTONDBLCLK

									            if (m.Msg == 256 || m.Msg == 513 || m.Msg == 515)

									            {

									                if (m.Msg == 513)

									                    PopupColorPalette();

									                return;

									            }

									            base.WndProc(ref   m);

									        }

									        private void PopupColorPalette()

									        {

									            //create a popup window

									            popupWnd = new PopupWindow(colors);

									            //calculate its position in screen coordinates

									            Rectangle rect = Bounds;

									            rect = this.Parent.RectangleToScreen(rect);

									            Point pt = new Point(rect.Left, rect.Bottom);

									            //tell it that we want the ColorChanged event

									            popupWnd.ColorChanged += new ColorChangedHandler(OnColorChanged);

									            //show the popup

									            popupWnd.Show(pt);

									            //disable the button so that the user can't click it

									            //while the popup is being displayed

									            this.Enabled = false;

									            this.timer.Start();

									        }

									        //event handler for the color change event from the popup window

									        //simply relay the event to the parent control

									        protected void OnColorChanged(object sender, ColorChangeArgs e)

									        {

									            //if a someone wants the event, and the color has actually changed

									            //call the event handler

									            if (ColorChanged != null && e.color != this.selectedColor)

									            {

									                this.selectedColor = e.color;

									                ColorChanged(this, e);

									            }

									            else //otherwise simply make note of the new color

									                this.selectedColor = e.color;

									        }

									        protected override void OnDrawItem(DrawItemEventArgs e)

									        {

									            var g = e.Graphics;

									            e.DrawBackground();

									            var brush = new SolidBrush(this.selectedColor);

									            var rect = e.Bounds;

									            rect.Width -= 1;

									            rect.Height -= 1;

									            g.FillRectangle(brush, rect);

									            g.DrawRectangle(Pens.Black, rect);

									            e.DrawFocusRectangle();

									        }

									        //This is the timer call back function. It checks to see 

									        //if the popup went from a visible state to an close state

									        //if so then it will uncheck and enable the button

									        private void OnCheckStatus(object sender, EventArgs e)

									        {

									            if (popupWnd != null && !popupWnd.Visible)

									            {

									                this.timer.Stop();

									                this.Enabled = true;

									            }

									        }

									        /// <summary>

									        /// a button style radio button that shows a color

									        /// </summary>

									        private class ColorRadioButton : RadioButton

									        {

									            public ColorRadioButton(Color color, Color backColor)

									            {

									                this.ClientSize = new Size(21, 21);

									                this.Appearance = Appearance.Button;

									                this.Name = "button";

									                this.Visible = true;

									                this.ForeColor = color;

									                this.FlatAppearance.BorderColor = backColor;

									                this.FlatAppearance.BorderSize = 0;

									                this.FlatStyle = FlatStyle.Flat;

									                this.Paint += new PaintEventHandler(OnPaintButton);

									            }

									            private void OnPaintButton(object sender, PaintEventArgs e)

									            {

									                //paint a square on the face of the button using the controls foreground color

									                Rectangle colorRect = new Rectangle(ClientRectangle.Left + 5, ClientRectangle.Top + 5, ClientRectangle.Width - 9, ClientRectangle.Height - 9);

									                e.Graphics.FillRectangle(new SolidBrush(this.ForeColor), colorRect);

									                e.Graphics.DrawRectangle(Pens.DarkGray, colorRect);

									            }

									        }

									        ///<summary>

									        ///this is the popup window.  This window will be the parent of the 

									        ///window with the color controls on it

									        ///</summary>

									        private class PopupWindow : ToolStripDropDown

									        {

									            public event ColorChangedHandler ColorChanged;

									            private ToolStripControlHost host;

									            private ColorPopup content;

									            public Color SelectedColor

									            {

									                get { return content.SelectedColor; }

									            }

									            public PopupWindow(ColorPopup content)

									            {

									                if (content == null)

									                    throw new ArgumentNullException("content");

									                this.content = content;

									                this.AutoSize = false;

									                this.DoubleBuffered = true;

									                this.ResizeRedraw = true;

									                //create a host that will host the content

									                host = new ToolStripControlHost(content);

									                this.Padding = Margin = host.Padding = host.Margin = Padding.Empty;

									                this.MinimumSize = content.MinimumSize;

									                content.MinimumSize = content.Size;

									                MaximumSize = new Size(content.Size.Width + 1, content.Size.Height + 1);

									                content.MaximumSize = new Size(content.Size.Width + 1, content.Size.Height + 1);

									                Size = new Size(content.Size.Width + 1, content.Size.Height + 1);

									                content.Location = Point.Empty;

									                //add the host to the list

									                Items.Add(host);

									            }

									            protected override void OnClosed(ToolStripDropDownClosedEventArgs e)

									            {

									                //when the window close tell the parent that the color changed

									                if (ColorChanged != null)

									                    ColorChanged(this, new ColorChangeArgs(this.SelectedColor));

									            }

									        }

									        ///<summary>

									        ///this class represends the control that has all the color radio buttons.

									        ///this control gets embedded into the PopupWindow class.

									        ///</summary>

									        private class ColorPopup : UserControl

									        {

									            //private Color[] colors = { Color.Black, Color.Gray, Color.Maroon, Color.Olive, Color.Green, Color.Teal, Color.Navy, Color.Purple, Color.White, Color.Silver, Color.Red, Color.Yellow, Color.Lime, Color.Aqua, Color.Blue, Color.Fuchsia };

									            private Color[] colors = {

									                Color.Black, Color.Navy, Color.DarkGreen, Color.DarkCyan, Color.DarkRed, Color.DarkMagenta, Color.Olive,

									                Color.LightGray, Color.DarkGray, Color.Blue, Color.Lime, Color.Cyan, Color.Red, Color.Fuchsia, 

									                Color.Yellow, Color.White, Color.RoyalBlue, Color.MediumBlue,  Color.LightGreen, Color.MediumSpringGreen, Color.Chocolate,

									                Color.Pink, Color.Khaki, Color.WhiteSmoke, Color.BlueViolet, Color.DeepSkyBlue, Color.OliveDrab, Color.SteelBlue,

									                Color.DarkOrange, Color.Tomato, Color.HotPink, Color.DimGray,

									            };

									            private string[] colorNames = {

									                "黑色", "藏青", "深绿", "深青", "红褐", "洋红", "褐绿", 

									                "浅灰", "灰色", "蓝色", "绿色", "青色", "红色", "紫红", 

									                "黄色", "白色", "蓝灰", "藏蓝", "淡绿", "青绿", "黄褐", 

									                "粉红", "嫩黄", "银白", "紫色", "天蓝", "灰绿", "青蓝", 

									                "橙黄", "桃红", "英红", "深灰"

									            };

									            private ToolTip toolTip = new ToolTip();

									            private ColorRadioButton[] buttons;

									            private Button moreColorsBtn;

									            private Color selectedColor = Color.Black;

									            ///<summary>

									            ///get or set the selected color

									            ///</summary>

									            public Color SelectedColor

									            {

									                get { return selectedColor; }

									                set

									                {

									                    selectedColor = value;

									                    Color[] colors = this.colors;

									                    for (int i = 0; i < colors.Length; i++)

									                        buttons[i].Checked = selectedColor == colors[i];

									                }

									            }

									            private void InitializeComponent()

									            {

									                this.SuspendLayout();

									                this.Name = "Color Popup";

									                this.Text = string.Empty;

									                this.ResumeLayout(false);

									            }

									            public ColorPopup()

									            {

									                InitializeComponent();

									                SetupButtons();

									                this.Paint += new PaintEventHandler(OnPaintBorder);

									            }

									            //place the buttons on the window.

									            private void SetupButtons()

									            {

									                Controls.Clear();

									                int x = 1;

									                int y = 2;

									                int breakCount = 7;

									                Color[] colors = this.colors;

									                this.buttons = new ColorRadioButton[colors.Length];

									                this.ClientSize = new Size(139, 137);

									                //color buttons

									                for (int i = 0; i < colors.Length; i++)

									                {

									                    if (i > 0 && i % breakCount == 0)

									                    {

									                        y += 19;

									                        x = 1;

									                    }

									                    buttons[i] = new ColorRadioButton(colors[i], this.BackColor);

									                    buttons[i].Location = new Point(x, y);

									                    toolTip.SetToolTip(buttons[i], colorNames[i]);

									                    Controls.Add(buttons[i]);

									                    buttons[i].Click += new EventHandler(BtnClicked);

									                    if (selectedColor == colors[i])

									                        buttons[i].Checked = true;

									                    x += 19;

									                }

									                //line...

									                y += 24;

									                var label = new Label();

									                label.AutoSize = false;

									                label.Text = string.Empty;

									                label.Width = this.Width - 5;

									                label.Height = 2;

									                label.BorderStyle = BorderStyle.Fixed3D;

									                label.Location = new Point(4, y);

									                Controls.Add(label);

									                //button

									                y += 7;

									                moreColorsBtn = new Button();

									                moreColorsBtn.FlatStyle = FlatStyle.Popup;

									                moreColorsBtn.Text = "其它颜色...";

									                moreColorsBtn.Location = new Point(6, y);

									                moreColorsBtn.ClientSize = new Size(127, 23);

									                moreColorsBtn.Click += new EventHandler(OnMoreClicked);

									                Controls.Add(moreColorsBtn);

									            }

									            private void OnPaintBorder(object sender, PaintEventArgs e)

									            {

									                var rect = this.ClientRectangle;

									                rect.Width -= 1;

									                rect.Height -= 1;

									                e.Graphics.DrawRectangle(new Pen(SystemColors.WindowFrame), rect);

									            }

									            public void BtnClicked(object sender, EventArgs e)

									            {

									                selectedColor = ((ColorRadioButton)sender).ForeColor;

									                ((ToolStripDropDown)Parent).Close();

									            }

									            public void OnMoreClicked(object sender, EventArgs e)

									            {

									                ColorDialog dlg = new ColorDialog();

									                dlg.Color = SelectedColor;

									                if (dlg.ShowDialog(this) == DialogResult.OK)

									                    selectedColor = dlg.Color;

									                ((ToolStripDropDown)Parent).Close();

									            }

									        }

									    }

									    //define the color changed event argument

									    public class ColorChangeArgs : System.EventArgs

									    {

									        //the selected color

									        public Color color;

									        public ColorChangeArgs(Color color)

									        {

									            this.color = color;

									        }

									    }

									}