---

Common/vtkObject.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkObject.h,v $
  Language:  C++

  Copyright (c) 1993-2002 Ken Martin, Will Schroeder, Bill Lorensen 
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/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 notice for more information.

=========================================================================*/
#ifndef __vtkObject_h
#define __vtkObject_h

#include "vtkObjectBase.h"
#include "vtkSetGet.h"
#include "vtkTimeStamp.h"

class vtkSubjectHelper;
class vtkCommand;

class VTK_COMMON_EXPORT vtkObject : public vtkObjectBase
{
public:
  vtkTypeRevisionMacro(vtkObject,vtkObjectBase);

  static vtkObject *New();

#ifdef _WIN32
  // avoid dll boundary problems
  void* operator new( size_t tSize );
  void operator delete( void* p );
#endif 
  
  virtual void DebugOn();

  virtual void DebugOff();
  
  unsigned char GetDebug();
  
  void SetDebug(unsigned char debugFlag);
  
  static void BreakOnError();
  
  virtual void Modified();
  
  virtual unsigned long GetMTime();

  virtual void PrintSelf(ostream& os, vtkIndent indent);


  static void SetGlobalWarningDisplay(int val);
  static void GlobalWarningDisplayOn(){vtkObject::SetGlobalWarningDisplay(1);};
  static void GlobalWarningDisplayOff() 
    {vtkObject::SetGlobalWarningDisplay(0);};
  static int  GetGlobalWarningDisplay();
  
  virtual void Register(vtkObjectBase* o);

  virtual void UnRegister(vtkObjectBase* o);


  unsigned long AddObserver(unsigned long event, vtkCommand *, 
                            float priority=0.0);
  unsigned long AddObserver(const char *event, vtkCommand *, 
                            float priority=0.0);
  vtkCommand *GetCommand(unsigned long tag);
  void RemoveObserver(vtkCommand*);
  //ETX
  void RemoveObserver(unsigned long tag);
  void RemoveObservers(unsigned long event);
  void RemoveObservers(const char *event);
  int HasObserver(unsigned long event);
  int HasObserver(const char *event);

  // This method invokes an event and return whether the event was
  // aborted or not. If the event was aborted, the return value is 1,
  // otherwise it is 0.  
  //BTX
  int InvokeEvent(unsigned long event, void *callData);
  int InvokeEvent(const char *event, void *callData);
  //ETX
  int InvokeEvent(unsigned long event) { return this->InvokeEvent(event, NULL); };
  int InvokeEvent(const char *event) { return this->InvokeEvent(event, NULL); };
  
protected:
  vtkObject(); 
  virtual ~vtkObject(); 

  unsigned char Debug;     // Enable debug messages
  vtkTimeStamp MTime;      // Keep track of modification time
  vtkSubjectHelper *SubjectHelper;

private:
  vtkObject(const vtkObject&);  // Not implemented.
  void operator=(const vtkObject&);  // Not implemented.
};

#endif

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