Observer.h

Go to the documentation of this file.

/* This software and supporting documentation are distributed by
 *     Institut Federatif de Recherche 49
 *     CEA/NeuroSpin, Batiment 145,
 *     91191 Gif-sur-Yvette cedex
 *     France
 *
 * This software is governed by the CeCILL-B license under
 * French law and abiding by the rules of distribution of free software.
 * You can  use, modify and/or redistribute the software under the
 * terms of the CeCILL-B license as circulated by CEA, CNRS
 * and INRIA at the following URL "http://www.cecill.info".
 *
 * As a counterpart to the access to the source code and  rights to copy,
 * modify and redistribute granted by the license, users are provided only
 * with a limited warranty  and the software's author,  the holder of the
 * economic rights,  and the successive licensors  have only  limited
 * liability.
 *
 * In this respect, the user's attention is drawn to the risks associated
 * with loading,  using,  modifying and/or developing or reproducing the
 * software by the user in light of its specific status of free software,
 * that may mean  that it is complicated to manipulate,  and  that  also
 * therefore means  that it is reserved for developers  and  experienced
 * professionals having in-depth computer knowledge. Users are therefore
 * encouraged to load and test the software's suitability as regards their
 * requirements in conditions enabling the security of their systems and/or
 * data to be ensured and,  more generally, to use and operate it in the
 * same conditions as regards security.
 *
 * The fact that you are presently reading this means that you have had
 * knowledge of the CeCILL-B license and that you accept its terms.
 */
 
 
#ifndef ANA_OBSERVER_OBSERVER_H
#define ANA_OBSERVER_OBSERVER_H
 
#include <set>
 
namespace anatomist
{
  //--- forward declarations --------------------------------------------------
 
  class Observable;
 
 
  //--- class declarations ----------------------------------------------------
 
  class Observer
  {
  public:
    virtual ~Observer();
 
    virtual void update( const Observable* observable, void* arg ) = 0;
 
  protected:
    virtual void cleanupObserver();
    virtual void registerObservable( Observable* );
    virtual void unregisterObservable( Observable* );
    const std::set<Observable *> & observed() const { return _observed; }
 
  private:
    std::set<Observable *> _observed;
 
    friend class Observable;
  };
 
}
 
 
#endif