CommonTools/DropdownContainerControl.cs

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace CommonTools
{
	public class ColorPickerCombobox : DropdownContainerControl<Color>
	{
		static ColorPickerCtrl m_colorPicker;
		static DropdownContainer<Color>	m_container;
		public new Color SelectedItem
		{
			get { return base.SelectedItem; }
			set { base.SelectedItem = value; }
		}
		public ColorPickerCombobox()
		{
			SelectedItem = Color.Wheat;
		}
		protected void CreateDropdown()
		{
			if (m_container == null)
			{
				m_container = new DropdownContainer<Color>(this);
				m_colorPicker = new ColorPickerCtrl();
				m_container.SetControl(m_colorPicker);
			}
			DropdownContainer = m_container;
		}
		protected override void OnKeyDown(KeyEventArgs e)
		{
			base.OnKeyDown(e);
		}
		protected override void ShowDropdown()
		{
			CreateDropdown();
			m_colorPicker.SelectedColor = SelectedItem;
			// only need to register / unregister because the dropdown is static and shared
			DropdownContainer.KeyDown += new KeyEventHandler(OnDropdownKeyDown);
			base.ShowDropdown();
		}
		public override void CloseDropdown(bool acceptValue)
		{
			DropdownContainer.KeyDown -= new KeyEventHandler(OnDropdownKeyDown);
			base.CloseDropdown(acceptValue);
			if (acceptValue)
				SelectedItem = m_colorPicker.SelectedColor;
		}
		protected override void DrawItem(Graphics dc, Rectangle itemrect)
		{
			Brush b = new SolidBrush(SelectedItem);
			dc.FillRectangle(b, itemrect);
		}
		void OnDropdownKeyDown(object sender, KeyEventArgs e)
		{
			if (e.KeyCode == Keys.Space)
			{