listviewsubclass.cs

基于ehotgis嵌入式gis平台的图层控制源码

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using Microsoft.WindowsCE.Forms;

using OpenNETCF.Windows.Forms;

namespace ListViewToolTip
{
	public class ListViewSubclass : NativeWindow
	{
		public event MouseEventHandler MouseDown;

		private const int WM_LBUTTONDOWN = 0x0201;
		private ListView listView;

		public ListViewSubclass(ListView listView)
		{
			this.listView = listView;
			this.AssignHandle(listView.Handle);
		}

		protected override void WndProc(ref Message m)
		{
			if (m.Msg == WM_LBUTTONDOWN)
			{
				int y = HiWord((int)m.LParam);
				int x = LoWord((int)m.LParam);
				MouseEventArgs args = new MouseEventArgs(0, 1, x, y, 0);
				if (MouseDown != null)
				{
					MouseDown(listView, args);
				}
			}

			base.WndProc(ref m);
		}

		private static int HiWord(int number)
		{
			if ((number & 0x80000000) == 0x80000000)
				return (number >> 16);
			else
				return (number >> 16) & 0xffff;
		}

		private static int LoWord(int number)
		{
			return number & 0xffff;
		}
	}
}