---

Observer.h

/*
 * Observer.h -- class interface for observers
 * Copyright (C) 2002  Eric Lemings <elemings@users.sourceforge.net>
 *
 * This software is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This software 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this software; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA
 *
 * RCS: $Id: Observer.h,v 1.2 2003/04/13 05:28:46 elemings Exp $
 */

#ifdef __cplusplus

#  ifndef OGS_SUPPORT_OBSERVER_H
#    define OGS_SUPPORT_OBSERVER_H

#    include <ogs/support/Namespace.h>

OGS_BEGIN_SUPPORT_NAMESPACE

class Event;
//class Object;

class Observer {
  public:
    virtual ~Observer () { }

  protected:
    virtual void handleEvent (Event& event) = 0;

    friend void Object::notifyObservers (Event& event);
};

OGS_END_SUPPORT_NAMESPACE

#  endif /* !defined OGS_SUPPORT_OBSERVER_H */

#endif /* defined __cplusplus */

---