vtkObserverMediator.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkObserverMediator.h
 
  Copyright (c) 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 vtkObserverMediator_h
#define vtkObserverMediator_h
 
#include "vtkObject.h"
#include "vtkRenderingCoreModule.h" // For export macro
 
class vtkRenderWindowInteractor;
class vtkInteractorObserver;
class vtkObserverMap;
 
class VTKRENDERINGCORE_EXPORT vtkObserverMediator : public vtkObject
{
public:
  static vtkObserverMediator* New();
 
 
  vtkTypeMacro(vtkObserverMediator, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
 
  void SetInteractor(vtkRenderWindowInteractor* iren);
  vtkGetObjectMacro(Interactor, vtkRenderWindowInteractor);
 
  int RequestCursorShape(vtkInteractorObserver*, int requestedShape);
 
  void RemoveAllCursorShapeRequests(vtkInteractorObserver*);
 
protected:
  vtkObserverMediator();
  ~vtkObserverMediator() override;
 
  // The render window whose cursor we are controlling
  vtkRenderWindowInteractor* Interactor;
 
  // A map whose key is the observer*, and whose data value is a cursor
  // request. Note that a special compare function is used to sort the
  // widgets based on the observer's priority.
  vtkObserverMap* ObserverMap; // given a widget*, return its data
 
  // The current observer and cursor shape
  vtkInteractorObserver* CurrentObserver;
  int CurrentCursorShape;
 
private:
  vtkObserverMediator(const vtkObserverMediator&) = delete;
  void operator=(const vtkObserverMediator&) = delete;
};
 
#endif