diff -r 3145aadca3d2 -r 0c551e8818e0 External/Aga.Controls/Tree/TreeNodeAdv.cs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/External/Aga.Controls/Tree/TreeNodeAdv.cs	Sun May 27 15:16:19 2012 +0000
@@ -0,0 +1,443 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Runtime.Serialization;
+using System.Security.Permissions;
+
+namespace Aga.Controls.Tree
+{
+	[Serializable]
+	public sealed class TreeNodeAdv : ISerializable
+	{
+		#region NodeCollection
+		private class NodeCollection : Collection<TreeNodeAdv>
+		{
+			private TreeNodeAdv _owner;
+
+			public NodeCollection(TreeNodeAdv owner)
+			{
+				_owner = owner;
+			}
+
+			protected override void ClearItems()
+			{
+				while (this.Count != 0)
+					this.RemoveAt(this.Count - 1);
+			}
+
+			protected override void InsertItem(int index, TreeNodeAdv item)
+			{
+				if (item == null)
+					throw new ArgumentNullException("item");
+
+				if (item.Parent != _owner)
+				{
+					if (item.Parent != null)
+						item.Parent.Nodes.Remove(item);
+					item._parent = _owner;
+					item._index = index;
+					for (int i = index; i < Count; i++)
+						this[i]._index++;
+					base.InsertItem(index, item);
+				}
+
+				if (_owner.Tree != null && _owner.Tree.Model == null)
+				{
+					_owner.Tree.SmartFullUpdate();
+				}
+			}
+
+			protected override void RemoveItem(int index)
+			{
+				TreeNodeAdv item = this[index];
+				item._parent = null;
+				item._index = -1;
+				for (int i = index + 1; i < Count; i++)
+					this[i]._index--;
+				base.RemoveItem(index);
+
+				if (_owner.Tree != null && _owner.Tree.Model == null)
+				{
+					_owner.Tree.UpdateSelection();
+					_owner.Tree.SmartFullUpdate();
+				}
+			}
+
+			protected override void SetItem(int index, TreeNodeAdv item)
+			{
+				if (item == null)
+					throw new ArgumentNullException("item");
+				RemoveAt(index);
+				InsertItem(index, item);
+			}
+		}
+		#endregion
+
+		#region Events
+
+		public event EventHandler<TreeViewAdvEventArgs> Collapsing;
+		internal void OnCollapsing()
+		{
+			if (Collapsing != null)
+				Collapsing(this, new TreeViewAdvEventArgs(this));
+		}
+
+		public event EventHandler<TreeViewAdvEventArgs> Collapsed;
+		internal void OnCollapsed()
+		{
+			if (Collapsed != null)
+				Collapsed(this, new TreeViewAdvEventArgs(this));
+		}
+
+		public event EventHandler<TreeViewAdvEventArgs> Expanding;
+		internal void OnExpanding()
+		{
+			if (Expanding != null)
+				Expanding(this, new TreeViewAdvEventArgs(this));
+		}
+
+		public event EventHandler<TreeViewAdvEventArgs> Expanded;
+		internal void OnExpanded()
+		{
+			if (Expanded != null)
+				Expanded(this, new TreeViewAdvEventArgs(this));
+		}
+
+		#endregion
+
+		#region Properties
+
+		private TreeViewAdv _tree;
+		public TreeViewAdv Tree
+		{
+			get { return _tree; }
+		}
+
+		private int _row;
+		public int Row
+		{
+			get { return _row; }
+			internal set { _row = value; }
+		}
+
+		private int _index = -1;
+		public int Index
+		{
+			get
+			{
+				return _index;
+			}
+		}
+
+		private bool _isSelected;
+		public bool IsSelected
+		{
+			get { return _isSelected; }
+			set
+			{
+				if (_isSelected != value)
+				{
+					if (Tree.IsMyNode(this))
+					{
+						//_tree.OnSelectionChanging
+						if (value)
+						{
+							if (!_tree.Selection.Contains(this))
+								_tree.Selection.Add(this);
+
+							if (_tree.Selection.Count == 1)
+								_tree.CurrentNode = this;
+						}
+						else
+							_tree.Selection.Remove(this);
+						_tree.UpdateView();
+						_tree.OnSelectionChanged();
+					}
+					_isSelected = value;
+				}
+			}
+		}
+
+		/// <summary>
+		/// Returns true if all parent nodes of this node are expanded.
+		/// </summary>
+		internal bool IsVisible
+		{
+			get
+			{
+				TreeNodeAdv node = _parent;
+				while (node != null)
+				{
+					if (!node.IsExpanded)
+						return false;
+					node = node.Parent;
+				}
+				return true;
+			}
+		}
+
+		private bool _isLeaf;
+		public bool IsLeaf
+		{
+			get { return _isLeaf; }
+			internal set { _isLeaf = value; }
+		}
+
+		private bool _isExpandedOnce;
+		public bool IsExpandedOnce
+		{
+			get { return _isExpandedOnce; }
+			internal set { _isExpandedOnce = value; }
+		}
+
+		private bool _isExpanded;
+		public bool IsExpanded
+		{
+			get { return _isExpanded; }
+			set
+			{
+				if (value)
+					Expand();
+				else
+					Collapse();
+			}
+		}
+
+		internal void AssignIsExpanded(bool value)
+		{
+			_isExpanded = value;
+		}
+
+		private TreeNodeAdv _parent;
+		public TreeNodeAdv Parent
+		{
+			get { return _parent; }
+		}
+
+		public int Level
+		{
+			get
+			{
+				if (_parent == null)
+					return 0;
+				else
+					return _parent.Level + 1;
+			}
+		}
+
+		public TreeNodeAdv PreviousNode
+		{
+			get
+			{
+				if (_parent != null)
+				{
+					int index = Index;
+					if (index > 0)
+						return _parent.Nodes[index - 1];
+				}
+				return null;
+			}
+		}
+
+		public TreeNodeAdv NextNode
+		{
+			get
+			{
+				if (_parent != null)
+				{
+					int index = Index;
+					if (index < _parent.Nodes.Count - 1)
+						return _parent.Nodes[index + 1];
+				}
+				return null;
+			}
+		}
+
+		internal TreeNodeAdv BottomNode
+		{
+			get
+			{
+				TreeNodeAdv parent = this.Parent;
+				if (parent != null)
+				{
+					if (parent.NextNode != null)
+						return parent.NextNode;
+					else
+						return parent.BottomNode;
+				}
+				return null;
+			}
+		}
+
+		internal TreeNodeAdv NextVisibleNode
+		{
+			get
+			{
+				if (IsExpanded && Nodes.Count > 0)
+					return Nodes[0];
+				else
+				{
+					TreeNodeAdv nn = NextNode;
+					if (nn != null)
+						return nn;
+					else
+						return BottomNode;
+				}
+			}
+		}
+
+		public bool CanExpand
+		{
+			get
+			{
+				return (Nodes.Count > 0 || (!IsExpandedOnce && !IsLeaf));
+			}
+		}
+
+		private object _tag;
+		public object Tag
+		{
+			get { return _tag; }
+		}
+
+		private Collection<TreeNodeAdv> _nodes;
+		internal Collection<TreeNodeAdv> Nodes
+		{
+			get { return _nodes; }
+		}
+
+		private ReadOnlyCollection<TreeNodeAdv> _children;
+		public ReadOnlyCollection<TreeNodeAdv> Children
+		{
+			get
+			{
+				return _children;
+			}
+		}
+
+		private int? _rightBounds;
+		internal int? RightBounds
+		{
+			get { return _rightBounds; }
+			set { _rightBounds = value; }
+		}
+
+		private int? _height;
+		internal int? Height
+		{
+			get { return _height; }
+			set { _height = value; }
+		}
+
+		private bool _isExpandingNow;
+		internal bool IsExpandingNow
+		{
+			get { return _isExpandingNow; }
+			set { _isExpandingNow = value; }
+		}
+
+		private bool _autoExpandOnStructureChanged = false;
+		public bool AutoExpandOnStructureChanged
+		{
+			get { return _autoExpandOnStructureChanged; }
+			set { _autoExpandOnStructureChanged = value; }
+		}
+
+		#endregion
+
+		public TreeNodeAdv(object tag)
+			: this(null, tag)
+		{
+		}
+
+		internal TreeNodeAdv(TreeViewAdv tree, object tag)
+		{
+			_row = -1;
+			_tree = tree;
+			_nodes = new NodeCollection(this);
+			_children = new ReadOnlyCollection<TreeNodeAdv>(_nodes);
+			_tag = tag;
+		}
+
+		public override string ToString()
+		{
+			if (Tag != null)
+				return Tag.ToString();
+			else
+				return base.ToString();
+		}
+
+		public void Collapse()
+		{
+			if (_isExpanded)
+				Collapse(true);
+		}
+
+		public void CollapseAll()
+		{
+			Collapse(false);
+		}
+
+		public void Collapse(bool ignoreChildren)
+		{
+			SetIsExpanded(false, ignoreChildren);
+		}
+
+		public void Expand()
+		{
+			if (!_isExpanded)
+				Expand(true);
+		}
+
+		public void ExpandAll()
+		{
+			Expand(false);
+		}
+
+		public void Expand(bool ignoreChildren)
+		{
+			SetIsExpanded(true, ignoreChildren);
+		}
+
+		private void SetIsExpanded(bool value, bool ignoreChildren)
+		{
+			if (Tree == null)
+				_isExpanded = value;
+			else
+				Tree.SetIsExpanded(this, value, ignoreChildren);
+		}
+
+		#region ISerializable Members
+
+		private TreeNodeAdv(SerializationInfo info, StreamingContext context)
+			: this(null, null)
+		{
+			int nodesCount = 0;
+			nodesCount = info.GetInt32("NodesCount");
+			_isExpanded = info.GetBoolean("IsExpanded");
+			_tag = info.GetValue("Tag", typeof(object));
+
+			for (int i = 0; i < nodesCount; i++)
+			{
+				TreeNodeAdv child = (TreeNodeAdv)info.GetValue("Child" + i, typeof(TreeNodeAdv));
+				Nodes.Add(child);
+			}
+
+		}
+
+		[SecurityPermission(SecurityAction.Demand, SerializationFormatter = true)]
+		public void GetObjectData(SerializationInfo info, StreamingContext context)
+		{
+			info.AddValue("IsExpanded", IsExpanded);
+			info.AddValue("NodesCount", Nodes.Count);
+			if ((Tag != null) && Tag.GetType().IsSerializable)
+				info.AddValue("Tag", Tag, Tag.GetType());
+
+			for (int i = 0; i < Nodes.Count; i++)
+				info.AddValue("Child" + i, Nodes[i], typeof(TreeNodeAdv));
+
+		}
+
+		#endregion
+	}
+}