vtkMRMLThreeDViewInteractorStyle.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkInteractorStyleTrackballCamera.h,v $

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or https://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 __vtkMRMLThreeDViewInteractorStyle_h
#define __vtkMRMLThreeDViewInteractorStyle_h

#include "vtkMRMLDisplayableManagerExport.h"

// MRML includes
#include "vtkMRMLCameraNode.h"
#include "vtkMRMLViewInteractorStyle.h"

// VTK includes
#include "vtkObject.h"
#include "vtkSmartPointer.h"

class vtkCellPicker;
class vtkVolumePicker;
class vtkWorldPointPicker;

class VTK_MRML_DISPLAYABLEMANAGER_EXPORT vtkMRMLThreeDViewInteractorStyle :
  public vtkMRMLViewInteractorStyle
{
public:
  static vtkMRMLThreeDViewInteractorStyle *New();
  vtkTypeMacro(vtkMRMLThreeDViewInteractorStyle, vtkMRMLViewInteractorStyle);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  void OnLeave() override;

  using vtkMRMLViewInteractorStyle::DelegateInteractionEventToDisplayableManagers;
  bool DelegateInteractionEventToDisplayableManagers(vtkEventData* inputEventData) override;

  vtkGetObjectMacro ( CameraNode, vtkMRMLCameraNode );
  vtkSetObjectMacro ( CameraNode, vtkMRMLCameraNode );

  void SetInteractor(vtkRenderWindowInteractor *interactor) override;

protected:
  vtkMRMLThreeDViewInteractorStyle();
  ~vtkMRMLThreeDViewInteractorStyle() override;

  bool QuickPick(int x, int y, double pickPoint[3]);

  vtkMRMLCameraNode *CameraNode;

  // For jump to slice feature (when mouse is moved while shift key is pressed)
  // Slow but can pick anything (volumes and semi-transparent surfaces)
  vtkSmartPointer<vtkCellPicker> AccuratePicker;
  // Picker that uses Z buffer. Fast but ignores volumes and semi-transparent surfaces.
  vtkSmartPointer<vtkWorldPointPicker> QuickPicker;
  // Picker for volume-rendered images. Fast, as it only computes a single ray.
  vtkSmartPointer<vtkVolumePicker> QuickVolumePicker;

private:
  vtkMRMLThreeDViewInteractorStyle(const vtkMRMLThreeDViewInteractorStyle&) = delete;
  void operator=(const vtkMRMLThreeDViewInteractorStyle&) = delete;
};

#endif