vtkObserverManager.h

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/*=auto=========================================================================

  Portions (c) Copyright 2005 Brigham and Women's Hospital (BWH) All Rights Reserved.

  See COPYRIGHT.txt
  or http://www.slicer.org/copyright/copyright.txt for details.

  Program:   3D Slicer
  Module:    $RCSfile: vtkObserverManager.h,v $
  Date:      $Date: 2006/01/08 04:48:05 $
  Version:   $Revision: 1.45 $

=========================================================================auto=*/

#ifndef __vtkObserverManager_h
#define __vtkObserverManager_h

// MRML includes
#include "vtkMRML.h"

// VTK includes
#include <vtkObject.h>

// STD includes
#include <map>

class vtkCallbackCommand;
class vtkIntArray;
class vtkFloatArray;
class vtkUnsignedLongArray;

#ifndef vtkObjectPointer
#define vtkObjectPointer(xx) (reinterpret_cast <vtkObject **>( (xx) ))
#endif

class VTK_MRML_EXPORT vtkObserverManager : public vtkObject
{
  public:

  static vtkObserverManager *New();
  vtkTypeMacro(vtkObserverManager,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  void SetObject(vtkObject **nodePtr, vtkObject *node);

  void SetAndObserveObject(vtkObject **nodePtr, vtkObject *node, float priority=0.0, bool logWarningIfSameObservationExists=true);

  void SetAndObserveObjectEvents(vtkObject **nodePtr, vtkObject *node, vtkIntArray *events, vtkFloatArray *priorities=nullptr, bool logWarningIfSameObservationExists=true);

  void RemoveObjectEvents(vtkObject *nodePtr);

  void GetObjectEvents(vtkObject *nodePtr, vtkIntArray *events, vtkFloatArray *priorities);

  void ObserveObject(vtkObject *node, float priority=0.0);

  void AddObjectEvents(vtkObject *nodePtr, vtkIntArray *events, vtkFloatArray *priorities=nullptr);

  vtkGetObjectMacro (Owner, vtkObject);
  void AssignOwner (vtkObject *owner) { this->Owner = owner; };
  vtkObject* GetObserver();

  vtkGetObjectMacro (CallbackCommand, vtkCallbackCommand);

  int GetObservationsCount(vtkObject* nodePtr, unsigned long event = 0);
protected:
  vtkObserverManager();
  ~vtkObserverManager() override;
  vtkObserverManager(const vtkObserverManager&);
  void operator=(const vtkObserverManager&);

  vtkObject *Owner;

  vtkCallbackCommand *CallbackCommand;

  std::map< vtkObject*, vtkUnsignedLongArray* > ObserverTags;

};

#endif