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Image ComboBox Control

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7 Jul 2005CDDL4 min read 365.9K   17.5K   117  
This is an extended, owner drawn ComboBox which has an added support to display images in the combobox dropdown as well as the edit (text) box.
using System;
using System.Drawing.Design ;
using System.Windows .Forms ;
using System.Windows .Forms.Design;

namespace ImageComboBox
{
	/// <summary>
	/// This class is associated with the DrawMode Property of the ImageComboBox.
	/// The ImageComboBox needs to support only two DrawModes - OwnerDrawFixed and OwnerDrawVariable.
	/// The DropDownDrawModes class is a UITypeEditor which displays the DrawModes in a dropdown ListBox.
	/// </summary>
	public sealed class DropDownDrawModes : System.Drawing.Design.UITypeEditor
	{
		private ListBox DrawModeList = new ListBox();
		private IWindowsFormsEditorService edSvc;

		public static object[] List;

		public DropDownDrawModes()
		{
			DrawModeList.BorderStyle=BorderStyle.None;
			DrawModeList.Click+=new EventHandler(DrawModeList_Click);
		}
		public override UITypeEditorEditStyle GetEditStyle(System.ComponentModel.ITypeDescriptorContext context)
		{
			return UITypeEditorEditStyle.DropDown;
		}

		public override object EditValue(System.ComponentModel.ITypeDescriptorContext context, IServiceProvider provider, object value)
		{
			DrawModeList.Items.Clear();
			DrawModeList.Items.AddRange(List);
			DrawModeList.Height=DrawModeList.PreferredHeight;
			edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
			if( edSvc != null )
			{
				edSvc.DropDownControl( DrawModeList );
				return DrawModeList.SelectedItem;

			}
			return value;
		}

		private void DrawModeList_Click(object sender, EventArgs e)
		{
			edSvc.CloseDropDown();
		}
	}
}

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This article, along with any associated source code and files, is licensed under The Common Development and Distribution License (CDDL)


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