Drawing Component to build GIS and CAM applications

using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Windows.Forms;
using System.Windows.Forms.Design;
using System.ComponentModel.Design;
using System.Drawing.Design;

namespace WorkSpace
{

	public class VisiPropertyEditor : System.Drawing.Design.UITypeEditor 
	{
		private IWindowsFormsEditorService edSvc = null;
		
		public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value) 
		{
			//MessageBox.Show("EditValue");
			VisiEditableProperty vv = null;
			if (context != null
				&& context.Instance != null
				&& provider != null) 
			{
				edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));

				if (edSvc != null) 
				{
					//MessageBox.Show("EditValue 1");
					vv = (VisiEditableProperty)value;
					edSvc.DropDownControl(vv.createControl());
										
				}
			}
			
			//value = vv;
			return vv;
		}

		public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context) 
		{
			if (context != null && context.Instance != null) 
			{
				return UITypeEditorEditStyle.DropDown;
			}
			return base.GetEditStyle(context);
		}
	}

	/// <summary>
	/// Summary description for VisiEditableProperty.
	/// </summary>
	public class VisiEditableProperty
	{
		public VisiEditableProperty()
		{			
		}
		
		public virtual Control createControl()
		{
			return new Control();
		}
	}
}