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

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

namespace Common_Tools.TreeViewAdv.Tree
{
	public class AutoRowHeightLayout: IRowLayout
	{
		private DrawContext _measureContext;
		private TreeViewAdv _treeView;
		private List<Rectangle> _rowCache;

		public AutoRowHeightLayout(TreeViewAdv treeView, int rowHeight)
		{
			_rowCache = new List<Rectangle>();
			_treeView = treeView;
			PreferredRowHeight = rowHeight;
			_measureContext = new DrawContext();
			_measureContext.Graphics = Graphics.FromImage(new Bitmap(1, 1));
		}

		private int _rowHeight;
		public int PreferredRowHeight
		{
			get { return _rowHeight; }
			set { _rowHeight = value; }
		}


		public int PageRowCount
		{
			get 
			{
				if (_treeView.RowCount == 0)
					return 0;
				else
				{
					int pageHeight = _treeView.DisplayRectangle.Height - _treeView.ColumnHeaderHeight;
					int y = 0;
					for (int i = _treeView.RowCount - 1; i >= 0; i--)
					{
						y += GetRowHeight(i);
						if (y > pageHeight)
							return Math.Max(0, _treeView.RowCount - 1 - i);
					}
					return _treeView.RowCount;
				}
			}
		}

		public int CurrentPageSize
		{
			get
			{
				if (_treeView.RowCount == 0)
					return 0;
				else
				{