gdcmSubject.h

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00001 /*=========================================================================
00002 
00003   Program: GDCM (Grassroots DICOM). A DICOM library
00004   Module:  $URL$
00005 
00006   Copyright (c) 2006-2010 Mathieu Malaterre
00007   All rights reserved.
00008   See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
00009 
00010      This software is distributed WITHOUT ANY WARRANTY; without even
00011      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
00012      PURPOSE.  See the above copyright notice for more information.
00013 
00014 =========================================================================*/
00015 #ifndef GDCMSUBJECT_H
00016 #define GDCMSUBJECT_H
00017 
00018 #include "gdcmObject.h"
00019 
00020 namespace gdcm
00021 {
00022 class Event;
00023 class Command;
00024 class SubjectInternals;
00029 class GDCM_EXPORT Subject : public Object
00030 {
00031 public:
00032   Subject();
00033   ~Subject();
00034 
00043   unsigned long AddObserver(const Event & event, Command *);
00044   unsigned long AddObserver(const Event & event, Command *) const;
00045  
00051   Command* GetCommand(unsigned long tag);
00052 
00054   void InvokeEvent( const Event & );
00055 
00058   void InvokeEvent( const Event & ) const;
00059 
00061   void RemoveObserver(unsigned long tag);
00062 
00064   void RemoveAllObservers();
00065 
00067   bool HasObserver( const Event & event ) const;
00068 
00069 protected:
00070 
00071 private:
00072   SubjectInternals *Internals;
00073 private:
00074 };
00075 
00076 } // end namespace gdcm
00077 
00078 #endif //GDCMSUBJECT_H
00079 

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