/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2007-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library 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.
*/
package org.geotools.renderer3d.utils.quadtree;
/**
* Listens to QuadTreeNode events, such as expansion or collapse, and deletion.
*
* @author Hans H�ggstr�m
*/
public interface NodeListener<N>
{
/**
* Called when a node is collapsed, that is, its child nodes are removed.
*/
void onCollapsed( QuadTreeNode<N> node );
/**
* Called when a node is expanded, that is, child nodes are added.
*/
void onExpanded( QuadTreeNode<N> node );
}