diff -r 3145aadca3d2 -r 0c551e8818e0 External/Aga.Controls/Tree/NodeControls/NodeControlsCollection.cs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/External/Aga.Controls/Tree/NodeControls/NodeControlsCollection.cs	Sun May 27 15:16:19 2012 +0000
@@ -0,0 +1,94 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.ComponentModel.Design;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Drawing.Design;
+
+namespace Aga.Controls.Tree.NodeControls
+{
+	internal class NodeControlsCollection : Collection<NodeControl>
+	{
+		private TreeViewAdv _tree;
+
+		public NodeControlsCollection(TreeViewAdv tree)
+		{
+			_tree = tree;
+		}
+
+		protected override void ClearItems()
+		{
+			_tree.BeginUpdate();
+			try
+			{
+				while (this.Count != 0)
+					this.RemoveAt(this.Count - 1);
+			}
+			finally
+			{
+				_tree.EndUpdate();
+			}
+		}
+
+		protected override void InsertItem(int index, NodeControl item)
+		{
+			if (item == null)
+				throw new ArgumentNullException("item");
+
+			if (item.Parent != _tree)
+			{
+				if (item.Parent != null)
+				{
+					item.Parent.NodeControls.Remove(item);
+				}
+				base.InsertItem(index, item);
+				item.AssignParent(_tree);
+				_tree.FullUpdate();
+			}
+		}
+
+		protected override void RemoveItem(int index)
+		{
+			NodeControl value = this[index];
+			value.AssignParent(null);
+			base.RemoveItem(index);
+			_tree.FullUpdate();
+		}
+
+		protected override void SetItem(int index, NodeControl item)
+		{
+			if (item == null)
+				throw new ArgumentNullException("item");
+
+			_tree.BeginUpdate();
+			try
+			{
+				RemoveAt(index);
+				InsertItem(index, item);
+			}
+			finally
+			{
+				_tree.EndUpdate();
+			}
+		}
+	}
+
+	internal class NodeControlCollectionEditor : CollectionEditor
+	{
+		private Type[] _types;
+
+		public NodeControlCollectionEditor(Type type)
+			: base(type)
+		{
+			_types = new Type[] { typeof(NodeTextBox), typeof(NodeIntegerTextBox), typeof(NodeDecimalTextBox), 
+				typeof(NodeComboBox), typeof(NodeCheckBox),
+				typeof(NodeStateIcon), typeof(NodeIcon), typeof(NodeNumericUpDown), typeof(ExpandingIcon)  };
+		}
+
+		protected override System.Type[] CreateNewItemTypes()
+		{
+			return _types;
+		}
+	}
+}