/*
 * (C) 2004 - Geotechnical Software Services
 * 
 * This code 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; either 
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This code 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.
 */
package no.geosoft.cc.event;


/**
 * Interface shared by all <em>listeners</em>.
 * 
 * @author <a href="mailto:info@geosoft.no">GeoSoft</a>
 */   
public interface EventListener
{
  /**
   * Called in response to a notify() call on the EventManager if the
   * present listener is registered to listen for the given event.
   * 
   * @param eventName  Name of the event.
   * @param source     The source the event (as defined by caller).
   * @param data       Additinal data (as defined by caller).
   */
  public void update (String eventName, Object source, Object data);
}