//=========================================================================
//  Copyright (c) Kitware, Inc.
//  All rights reserved.
//  See LICENSE.txt 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.
//=========================================================================
// .NAME vtkPVTrackballDolly - Zooms camera with vertical mouse movement.
// .SECTION Description
// vtkPVTrackballDolly allows the user to interactively
// manipulate the camera, the viewpoint of the scene.
// Moving the mouse down moves the camera in. Up moves it out.

#ifndef __vtkPVTrackballDolly_h
#define __vtkPVTrackballDolly_h

#include "vtkCMBGraphicsModule.h" // For export macro
#include "vtkCameraManipulator.h"
#include "cmbSystemConfig.h"

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

  // Description:
  // Event bindings controlling the effects of pressing mouse buttons
  // or moving the mouse.
  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;

protected:
  vtkPVTrackballDolly();
  ~vtkPVTrackballDolly() override;

  double ZoomScale;

  vtkPVTrackballDolly(const vtkPVTrackballDolly&); // Not implemented
  void operator=(const vtkPVTrackballDolly&); // Not implemented
};

#endif
