vtkPVTrackballZoom.h

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

  Program:   ParaView
  Module:    vtkPVTrackballZoom.h

  Copyright (c) Kitware, Inc.
  All rights reserved.
  See Copyright.txt or http://www.paraview.org/HTML/Copyright.html 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 vtkPVTrackballZoom_h
#define vtkPVTrackballZoom_h

#include "vtkCameraManipulator.h"
#include "vtkPVVTKExtensionsInteractionStyleModule.h" // needed for export macro

class VTKPVVTKEXTENSIONSINTERACTIONSTYLE_EXPORT vtkPVTrackballZoom : public vtkCameraManipulator
{
public:
  static vtkPVTrackballZoom* New();
  vtkTypeMacro(vtkPVTrackballZoom, vtkCameraManipulator);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  void OnMouseMove(int x, int y, vtkRenderer* ren, vtkRenderWindowInteractor* rwi) override;
  void OnButtonDown(int x, int y, vtkRenderer* ren, vtkRenderWindowInteractor* rwi) override;
  void OnButtonUp(int x, int y, vtkRenderer* ren, vtkRenderWindowInteractor* rwi) override;

  vtkSetMacro(UseDollyForPerspectiveProjection, bool);
  vtkGetMacro(UseDollyForPerspectiveProjection, bool);
  vtkBooleanMacro(UseDollyForPerspectiveProjection, bool);

protected:
  vtkPVTrackballZoom();
  ~vtkPVTrackballZoom() override;

  bool UseDollyForPerspectiveProjection;
  double ZoomScale;

  vtkPVTrackballZoom(const vtkPVTrackballZoom&) = delete;
  void operator=(const vtkPVTrackballZoom&) = delete;
};

#endif