/*=========================================================================                                                                               
Program:   bbtk
Module:    $RCSfile$
Language:  C++
Date:      $Date$
Version:   $Revision$
=========================================================================*/

/* ---------------------------------------------------------------------

* Copyright (c) CREATIS-LRMN (Centre de Recherche en Imagerie Medicale)
* Authors : Eduardo Davila, Laurent Guigues, Jean-Pierre Roux
*
*  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/licences/Licence_CeCILL-B_V1-en.html 
*  or in the file LICENSE.txt.
*
*  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. 
*
*  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.
* ------------------------------------------------------------------------ */                                                                         

/**
*  \file 
*  \brief Class bbtk::Observable 
*/


#include "Observable.h"

namespace bbtk
{


	//=========================================================================
	Observable::Observable()
	{
		_changed=false;
	}

	//=========================================================================
	Observable::~Observable()
	{
	}
	//=========================================================================
	
	bool Observable::hasChanged()
	{
		return _changed;
	}

	//=========================================================================
	
	void Observable::notifyObservers()
	{
		if(_changed)
		{
			int i;
			for(i=0;i<_observers.size();i++)
			{
				_observers[i]->update();
			}
			_changed=false;
		}
	}

    //=========================================================================                
	
	void Observable::setChanged()
	{
		_changed=true;
	}

	//=========================================================================

	void Observable::addObserver(Observer *observer)
	{
		std::cout<<"RaC Observable::addObserver "<<observer<<std::endl;
		_observers.push_back(observer);
	}

}  // EO namespace bbtk

// EOF