itkEventObject.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkEventObject.h,v $
  Language:  C++
  Date:      $Date: 2002/04/23 22:23:16 $
  Version:   $Revision: 1.10 $

  Copyright (c) 2002 Insight Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm 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 __itkEventObject_h
#define __itkEventObject_h

#include "itkIndent.h"


namespace itk
{

class ITK_EXPORT EventObject
{
public:
  EventObject() {}
  
  virtual ~EventObject() {}
  
  virtual EventObject* MakeObject() const=0;  
  
  virtual void Print(std::ostream& os) const;
  
  virtual const char * GetEventName(void) const=0;
  
  virtual bool CheckEvent(const EventObject*) const=0;
  
protected:
  virtual void PrintSelf(std::ostream& os, Indent indent) const;
  virtual void PrintHeader(std::ostream& os, Indent indent) const;
  virtual void PrintTrailer(std::ostream& os, Indent indent) const;
   
private:
  typedef  EventObject * EventFactoryFunction();
  EventObject(const EventObject&);
  void operator=(const EventObject&);
};


inline std::ostream& operator<<(std::ostream& os, EventObject &e)
{
  (&e)->Print(os);
  return os;
}




/*
 *  Macro for creating new Events
 */
#define itkEventMacro( classname , super ) \
 class classname : public super { \
   public: \
     typedef classname Self; \
     typedef super Superclass; \
     classname() {} \
     virtual ~classname() {} \
     virtual const char * GetEventName() const { return #classname; } \
     virtual bool CheckEvent(const ::itk::EventObject* e) const \
       { return dynamic_cast<const Self*>(e); } \
     virtual ::itk::EventObject* MakeObject() const \
       { return new Self; } \
   private: \
     classname(const Self&); \
     void operator=(const Self&); \
 }



itkEventMacro( NoEvent            , EventObject );
itkEventMacro( AnyEvent           , EventObject );
itkEventMacro( DeleteEvent        , AnyEvent );
itkEventMacro( StartEvent         , AnyEvent );
itkEventMacro( EndEvent           , AnyEvent );
itkEventMacro( ProgressEvent      , AnyEvent );
itkEventMacro( ExitEvent          , AnyEvent );
itkEventMacro( ModifiedEvent      , AnyEvent );
itkEventMacro( IterationEvent     , AnyEvent );
itkEventMacro( PickEvent          , AnyEvent );
itkEventMacro( StartPickEvent     , PickEvent   );
itkEventMacro( EndPickEvent       , PickEvent   );
itkEventMacro( AbortCheckEvent    , PickEvent   );

itkEventMacro( UserEvent          , AnyEvent );

   
} // end namespace itk

#endif

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