# gdcmSubject.h

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    00001 /*=========================================================================
    00002
    00003   Program: GDCM (Grassroots DICOM). A DICOM library
    00004   Module:  $URL$
    00005
    00006   Copyright (c) 2006-2009 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;
    00028 class GDCM_EXPORT Subject : public Object
    00029 {
    00030 public:
    00031   Subject();
    00032   ~Subject();
    00033
    00042   unsigned long AddObserver(const Event & event, Command *);
    00043   unsigned long AddObserver(const Event & event, Command *) const;
    00044
    00050   Command* GetCommand(unsigned long tag);
    00051
    00053   void InvokeEvent( const Event & );
    00054
    00057   void InvokeEvent( const Event & ) const;
    00058
    00060   void RemoveObserver(unsigned long tag);
    00061
    00063   void RemoveAllObservers();
    00064
    00066   bool HasObserver( const Event & event ) const;
    00067
    00068 protected:
    00069
    00070 private:
    00071   SubjectInternals *Internals;
    00072 private:
    00073 };
    00074
    00075 } // end namespace gdcm
    00076
    00077 #endif //__gdcmSubject_h
    00078