gdcmSubject.h

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/*=========================================================================
 
  Program: GDCM (Grassroots DICOM). A DICOM library
 
  Copyright (c) 2006-2011 Mathieu Malaterre
  All rights reserved.
  See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html 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 notice for more information.
 
=========================================================================*/
#ifndef GDCMSUBJECT_H
#define GDCMSUBJECT_H
 
#include "gdcmObject.h"
 
namespace gdcm
{
class Event;
class Command;
class SubjectInternals;
class GDCM_EXPORT Subject : public Object
{
public:
  Subject();
  ~Subject() override;
 
  unsigned long AddObserver(const Event & event, Command *);
  unsigned long AddObserver(const Event & event, Command *) const;
 
  Command* GetCommand(unsigned long tag);
 
  void InvokeEvent( const Event & );
 
  void InvokeEvent( const Event & ) const;
 
  void RemoveObserver(unsigned long tag);
 
  void RemoveAllObservers();
 
  bool HasObserver( const Event & event ) const;
 
protected:
 
private:
  SubjectInternals *Internals;
private:
};
 
} // end namespace gdcm
 
#endif //GDCMSUBJECT_H