otbMVCModel.h

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/*=========================================================================

  Program:   ORFEO Toolbox
  Language:  C++
  Date:      $Date$
  Version:   $Revision$


  Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
  See OTBCopyright.txt for details.


     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#ifndef __otbMVCModel_h
#define __otbMVCModel_h

#include <set>
#include "itkObject.h"
#include "itkObjectFactory.h"

namespace otb
{
template <class TListener>
class MVCModel
{
public:
  typedef MVCModel                      Self;
  typedef itk::Object                   Superclass;
  typedef itk::SmartPointer<Self>       Pointer;
  typedef itk::SmartPointer<const Self> ConstPointer;

  // Define the listener type
  typedef TListener ListenerType;

  typedef std::set<ListenerType *> ListenersSetType;

  virtual bool RegisterListener(ListenerType * listener)
  {
    return (m_RegisteredListeners.insert(listener).second);
  }

  virtual void UnRegisterListener(ListenerType * listener)
  {
    m_RegisteredListeners.erase(listener);
  }

  virtual void UnRegisterAllListeners()
  {
    m_RegisteredListeners.clear();
  }

  virtual void NotifyAll()
  {
    for (typename ListenersSetType::iterator it = m_RegisteredListeners.begin();
         it != m_RegisteredListeners.end();
         ++it)
      {
      this->NotifyListener(*it);
      }
  }

  virtual void NotifyListener(ListenerType * listener)
  {
    listener->Notify();
  }

protected:
  MVCModel() {}
  virtual ~MVCModel() {}

private:
  MVCModel(const Self&); //purposely not implemented
  void operator =(const Self&); //purposely not implemented

  ListenersSetType m_RegisteredListeners;
};
}
#endif