diff -r 3145aadca3d2 -r 0c551e8818e0 External/Aga.Controls/Tree/NodeControls/NodeStateIcon.cs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/External/Aga.Controls/Tree/NodeControls/NodeStateIcon.cs	Sun May 27 15:16:19 2012 +0000
@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Drawing;
+using Aga.Controls.Properties;
+
+namespace Aga.Controls.Tree.NodeControls
+{
+	public class NodeStateIcon: NodeIcon
+	{
+		private Image _leaf;
+		private Image _opened;
+		private Image _closed;
+
+		public NodeStateIcon()
+		{
+			_leaf = MakeTransparent(Resources.Leaf);
+			_opened = MakeTransparent(Resources.Folder);
+			_closed = MakeTransparent(Resources.FolderClosed);
+		}
+
+		private static Image MakeTransparent(Bitmap bitmap)
+		{
+			bitmap.MakeTransparent(bitmap.GetPixel(0,0));
+			return bitmap;
+		}
+
+		protected override Image GetIcon(TreeNodeAdv node)
+		{
+			Image icon = base.GetIcon(node);
+			if (icon != null)
+				return icon;
+			else if (node.IsLeaf)
+				return _leaf;
+			else if (node.CanExpand && node.IsExpanded)
+				return _opened;
+			else
+				return _closed;
+		}
+	}
+}