// ITreeNode.cs - Interface and delegates for tree node navigation and updating.
//
// Author: Mike Kestner  <mkestner@ximian.com>
//
// Copyright (c) 2003 Novell, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of version 2 of the Lesser GNU General 
// Public License as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this program; if not, write to the
// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.


namespace Gtk {

	using System;

	public delegate void TreeNodeAddedHandler (object o, ITreeNode child);

	public delegate void TreeNodeRemovedHandler (object o, ITreeNode child, int old_position);

	public interface ITreeNode {

		int ID { get; }

		ITreeNode Parent { get; }

		int ChildCount { get; }

		ITreeNode this [int index] { get; }

		int IndexOf (object o);

		event EventHandler Changed;

		event TreeNodeAddedHandler ChildAdded;

		event TreeNodeRemovedHandler ChildRemoved;
	}
}