Little Registry Cleaner/Common Tools/TreeViewAdv/Tree/IncrementalSearch.cs

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using System;
using System.Collections.Generic;
using System.Text;
using Common_Tools.TreeViewAdv.Tree.NodeControls;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;

namespace Common_Tools.TreeViewAdv.Tree
{
	internal class IncrementalSearch
	{
		private const int SearchTimeout = 300; //end of incremental search timeot in msec

		private TreeViewAdv _tree;
		private TreeNodeAdv _currentNode;
		private string _searchString = "";
		private DateTime _lastKeyPressed = DateTime.Now;

		public IncrementalSearch(TreeViewAdv tree)
		{
			_tree = tree;
		}

		public void Search(Char value)
		{
			if (!Char.IsControl(value))
			{
				Char ch = Char.ToLowerInvariant(value);
				DateTime dt = DateTime.Now;
				TimeSpan ts = dt - _lastKeyPressed;
				_lastKeyPressed = dt;
				if (ts.TotalMilliseconds < SearchTimeout)
				{
					if (_searchString == value.ToString())
						FirstCharSearch(ch);
					else
						ContinuousSearch(ch);
				}
				else
				{
					FirstCharSearch(ch);
				}
			}
		}

		private void ContinuousSearch(Char value)
		{
			if (value == ' ' && String.IsNullOrEmpty(_searchString))
				return; //Ingnore leading space

			_searchString += value;
			DoContinuousSearch();
		}

		private void FirstCharSearch(Char value)
		{
			if (value == ' ')
				return;