diff -r 3145aadca3d2 -r 0c551e8818e0 External/Aga.Controls/Tree/AutoRowHeightLayout.cs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/External/Aga.Controls/Tree/AutoRowHeightLayout.cs	Sun May 27 15:16:19 2012 +0000
@@ -0,0 +1,151 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Drawing;
+using Aga.Controls.Tree.NodeControls;
+
+namespace Aga.Controls.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
+				{
+					int pageHeight = _treeView.DisplayRectangle.Height - _treeView.ColumnHeaderHeight;
+					int y = 0;
+					for (int i = _treeView.FirstVisibleRow; i < _treeView.RowCount; i++)
+					{
+						y += GetRowHeight(i);
+						if (y > pageHeight)
+							return Math.Max(0, i - _treeView.FirstVisibleRow);
+					}
+					return Math.Max(0, _treeView.RowCount - _treeView.FirstVisibleRow);
+				}
+			}
+		}
+
+		public Rectangle GetRowBounds(int rowNo)
+		{
+			if (rowNo >= _rowCache.Count)
+			{
+				int count = _rowCache.Count;
+				int y = count > 0 ? _rowCache[count - 1].Bottom : 0;
+				for (int i = count; i <= rowNo; i++)
+				{
+					int height = GetRowHeight(i);
+					_rowCache.Add(new Rectangle(0, y, 0, height));
+					y += height;
+				}
+				if (rowNo < _rowCache.Count - 1)
+					return Rectangle.Empty;
+			}
+			if (rowNo >= 0 && rowNo < _rowCache.Count)
+				return _rowCache[rowNo];
+			else
+				return Rectangle.Empty;
+		}
+
+		private int GetRowHeight(int rowNo)
+		{
+			if (rowNo < _treeView.RowMap.Count)
+			{
+				TreeNodeAdv node = _treeView.RowMap[rowNo];
+				if (node.Height == null)
+				{
+					int res = 0;
+					_measureContext.Font = _treeView.Font;
+					foreach (NodeControl nc in _treeView.NodeControls)
+					{
+						int h = nc.GetActualSize(node, _measureContext).Height;
+						if (h > res)
+							res = h;
+					}
+					node.Height = res;
+				}
+				return node.Height.Value;
+			}
+			else
+				return 0;
+		}
+
+		public int GetRowAt(Point point)
+		{
+			int py = point.Y - _treeView.ColumnHeaderHeight;
+			int y = 0;
+			for (int i = _treeView.FirstVisibleRow; i < _treeView.RowCount; i++)
+			{
+				int h = GetRowHeight(i);
+				if (py >= y && py < y + h)
+					return i;
+				else
+					y += h;
+			}
+			return -1;
+		}
+
+		public int GetFirstRow(int lastPageRow)
+		{
+			int pageHeight = _treeView.DisplayRectangle.Height - _treeView.ColumnHeaderHeight;
+			int y = 0;
+			for (int i = lastPageRow; i >= 0; i--)
+			{
+				y += GetRowHeight(i);
+				if (y > pageHeight)
+					return Math.Max(0, i + 1);
+			}
+			return 0;
+		}
+
+		public void ClearCache()
+		{
+			_rowCache.Clear();
+		}
+	}
+}