//ColorCombobox.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
namespace ColorComboTestApp
{
public partial class ColorComboBox : UserControl
{
#region "ColorComboButton"
private class ColorComboButton : CheckBox
{
#region "class ColorRadioButton"
///
/// a button style radio button that shows a color
///
private class ColorRadioButton : RadioButton
{
public ColorRadioButton(Color color, Color backColor)
{
this.ClientSize = new Size(20, 20);
this.Appearance = Appearance.Button;
this.Name = "button1";
this.Visible = true;
this.ForeColor = color;
this.FlatAppearance.BorderColor = backColor;
this.FlatAppearance.BorderSize = 0;
this.FlatStyle = FlatStyle.Flat;
this.Paint += new System.Windows.Forms.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 + 4, ClientRectangle.Top + 4, ClientRectangle.Width - 9, ClientRectangle.Height - 9);
e.Graphics.FillRectangle(new SolidBrush(this.ForeColor), colorRect);
e.Graphics.DrawRectangle(new Pen(Color.Black), colorRect);
}
}
#endregion
#region "class PopupWindow"
///
///this is the popup window. This window will be the parent of the
///window with the color controls on it
///
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));
}
}
}
#endregion
#region "class ColorPopup"
///
///this class represends the control that has all the color radio buttons.
///this control gets embedded into the PopupWindow class.
///
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[] extendedColors = { Color.Black, Color.Brown, Color.Olive, Color.DarkGreen, Color.FromArgb(0x00, 0x033, 0x66), Color.DarkBlue, Color.Indigo, Color.FromArgb(0x33, 0x33, 0x33), Color.DarkRed, Color.Orange, Color.FromArgb(0x80, 0x80, 0), Color.Green, Color.Teal, Color.Blue, Color.FromArgb(0x66, 0x66, 0x99), Color.FromArgb(0x80, 0x80, 0x80), Color.Red, Color.FromArgb(0xFF, 0x99, 0x00), Color.Lime, Color.SeaGreen, Color.Aqua, Color.LightBlue, Color.Violet, Color.FromArgb(0x99, 0x99, 0x99), Color.Pink, Color.Gold, Color.Yellow, Color.FromArgb(0x00, 0xFF, 0x00), Color.Turquoise, Color.SkyBlue, Color.Plum, Color.FromArgb(0xC0, 0xC0, 0xC0), Color.FromArgb(0xFF, 0x99, 0xCC), Color.Tan, Color.LightYellow, Color.LightGreen, Color.FromArgb(0xCC, 0xFF, 0xFF), Color.FromArgb(0x99, 0xCC, 0xFF), Color.Lavender, Color.White };
private ColorRadioButton[] buttons;
private Button moreColorsBtn;
private Color selectedColor = Color.Black;
private Boolean extended = false;
//whether to show 16 colors or the extended colors
public Boolean ExtendedColors
{
set
{
extended = value;
SetupButtons();
}
get
{
return extended;
}
}
///
///get or set the selected color
///
public Color SelectedColor
{
get
{
return selectedColor;
}
set
{
selectedColor = value;
Color[] colors = extended ? this.extendedColors : 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 = "";
this.ResumeLayout(false);
}
public ColorPopup()
{
InitializeComponent();
SetupButtons();
this.Paint += new System.Windows.Forms.PaintEventHandler(OnPaintBorder);
}
//place the buttons on the window.
private void SetupButtons()
{
Controls.Clear();
int x = 3;
int y = 3;
int breakCount = extended ? 8 : 4;
Color[] colors = extended ? this.extendedColors : this.colors;
this.buttons = new ColorRadioButton[colors.Length];
if (extended)
{
this.ClientSize = new System.Drawing.Size(166, 130);
}
else
{
this.ClientSize = new System.Drawing.Size(86, 110);
}
for (int i = 0; i < colors.Length; i++)
{
if (i > 0 && i % breakCount == 0)
{
y += 20;
x = 3;
}
buttons[i] = new ColorRadioButton(colors[i], this.BackColor);
buttons[i].Location = new Point(x, y);
Controls.Add(buttons[i]);
buttons[i].Click += new EventHandler(BtnClicked);
if (selectedColor == colors[i])
{
buttons[i].Checked = true;
}
x += 20;
}
moreColorsBtn = new Button();
moreColorsBtn.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
moreColorsBtn.Text = "More Colors...";
moreColorsBtn.Location = new Point(3, y + 20);
moreColorsBtn.ClientSize = new Size(extended ? 160 : 80, 24);
moreColorsBtn.Click += new EventHandler(OnMoreClicked);
Controls.Add(moreColorsBtn);
}
private void OnPaintBorder(object sender, PaintEventArgs e)
{
e.Graphics.DrawRectangle(new Pen(Color.Black), this.ClientRectangle);
}
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();
}
}
#endregion
#region "member variables"
private PopupWindow popupWnd;
private ColorPopup colors = new ColorPopup();
private Color selectedColor = Color.Black;
private Timer timer = new Timer();
#endregion
#region "Events"
public event ColorChangedHandler ColorChanged;
#endregion
#region "Properties"
///
/// Set or get the selected color
///
public Color SelectedColor
{
get
{
return selectedColor;
}
set
{
selectedColor = value;
colors.SelectedColor = value;
}
}
///
/// Set whether the control is in extended color mode or normal mode
///
public Boolean Extended
{
set
{
colors.ExtendedColors = value;
}
get
{
return colors.ExtendedColors;
}
}
#endregion
#region "constructor"
public ColorComboButton()
: this(false, Color.Black)
{
}
public ColorComboButton(Boolean extended, Color selectedColor)
{
this.SuspendLayout();
//
// ColorCombo
//
this.Appearance = System.Windows.Forms.Appearance.Button;
this.AutoSize = false;
this.Size = new Size(103, 23);
this.Text = "";
this.Paint += new System.Windows.Forms.PaintEventHandler(this.ColorCombo_Paint);
this.Click += new System.EventHandler(this.ColorCombo_Click);
timer.Tick += new EventHandler(OnCheckStatus);
timer.Interval = 30;
timer.Start();
colors.ExtendedColors = extended;
colors.SelectedColor = this.selectedColor = selectedColor;
this.ResumeLayout(false);
}
#endregion
#region "Methods"
private void ColorCombo_Click(object sender, EventArgs e)
{
//if it is already down, don't do anything.
//this shouldn't happen anymore since we
//started to disable the button when the
//drop down is being displayed
if (!this.Checked)
{
return;
}
//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 System.Drawing.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;
}
//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;
}
}
//paint the button
private void ColorCombo_Paint(object sender, PaintEventArgs e)
{
Rectangle rect = new Rectangle((ClientRectangle.Right) - 18, ClientRectangle.Top, 18, ClientRectangle.Height);
DrawArrow(e.Graphics, rect);
Rectangle colorRect = new Rectangle(ClientRectangle.Left + 5, ClientRectangle.Top + 5, ClientRectangle.Width - 21, ClientRectangle.Height - 11);
DrawColor(e.Graphics, colorRect, selectedColor);
}
//draw the drop down arrow on the right side of the button
private void DrawArrow(Graphics dc, Rectangle rect)
{
Point[] ptsArrow = new Point[3];
int x = rect.Left + (rect.Right - rect.Left) / 2;
int y = rect.Top + (rect.Bottom - rect.Top) / 2;
ptsArrow[0].X = x - 4;
ptsArrow[0].Y = y - 2;
ptsArrow[1].X = x + 4;
ptsArrow[1].Y = y - 2;
ptsArrow[2].X = x;
ptsArrow[2].Y = y + 2;
SolidBrush brush = new SolidBrush(Color.FromArgb(this.Enabled ? 255 : 100, Color.Black));
dc.FillPolygon(brush, ptsArrow);
}
//draw the rectangle in the middle of the button showing the selected color
private void DrawColor(Graphics dc, Rectangle rect, Color color)
{
SolidBrush brush = new SolidBrush(Color.FromArgb(this.Enabled ? 255 : 100, color));
dc.FillRectangle(brush, rect);
Pen blackPen = new Pen(Color.Black);
dc.DrawRectangle(blackPen, rect);
}
//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 myObject, EventArgs myEventArgs)
{
if (popupWnd != null && !popupWnd.Visible)
{
this.Checked = false;
this.Enabled = true;
}
}
#endregion
}
#endregion
#region "Properties"
///
/// Set or get the selected color
///
public Color SelectedColor
{
get
{
return button.SelectedColor;
}
set
{
button.SelectedColor = value;
}
}
///
/// Set whether the control is in extended color mode or normal mode
///
public Boolean Extended
{
set
{
button.Extended = value;
}
get
{
return button.Extended;
}
}
#endregion
///
/// color change event handler
///
public event ColorChangedHandler ColorChanged;
public ColorComboBox()
{
InitializeComponent();
//setup event handler to catch the ColorChanged message from the
//color popup
button.ColorChanged += new ColorChangedHandler(button_ColorChanged);
}
public void button_ColorChanged(object sender, ColorChangeArgs e)
{
if (ColorChanged != null)
{
ColorChanged(this, e);
}
}
private void ColorComboBox_SizeChanged(object sender, EventArgs e)
{
button.Location = new Point(0, 0);
button.Size = this.Size;
}
}
#region "EventArgs and delegate"
//define the color changed event argument
public class ColorChangeArgs : System.EventArgs
{
public ColorChangeArgs(Color color)
{
this.color = color;
}
//the selected color
public Color color;
}
//event handler delegate
public delegate void ColorChangedHandler(object sender, ColorChangeArgs e);
#endregion
}
//ColorComboBox.Designer.cs
namespace ColorComboTestApp
{
partial class ColorComboBox
{
///
/// Required designer variable.
///
private System.ComponentModel.IContainer components = null;
///
/// Clean up any resources being used.
///
///true if managed resources should be disposed; otherwise, false.
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Component Designer generated code
///
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
///
private void InitializeComponent()
{
button = new ColorComboButton();
this.SuspendLayout();
//
// ColorComboBox
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.Name = "ColorComboBox";
this.Size = new System.Drawing.Size(103, 23);
this.SizeChanged += new System.EventHandler(this.ColorComboBox_SizeChanged);
Controls.Add(button);
this.ResumeLayout(false);
}
#endregion
private ColorComboButton button;
}
}