Observer.h

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00001 /* -*- mode:c++ - */
00002 
00014 #ifndef _Observer_H_
00015 #define _Observer_H_
00016 
00017 #include "libhippo.h"
00018 
00019 
00020 namespace hippodraw {
00021 
00022 class Observable;
00023 
00034 class MDL_HIPPOPLOT_API Observer 
00035 {
00036 public:
00037 
00041   Observer();
00042 
00048   virtual ~Observer ();
00049 
00053   virtual void update ( const Observable * ) = 0;
00054 
00062   virtual void willDelete ( const Observable * );
00063 
00064 };
00065 
00066 } // namespace hippodraw
00067 #endif // _Observer_H_

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