vtkMultiSliceContextItem.h

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

  Program:   Visualization Toolkit
  Module:    vtkMultiSliceContextItem.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 vtkMultiSliceContextItem_h
#define vtkMultiSliceContextItem_h

#include "vtkCommand.h" // needed for vtkCommand::UserEvent.
#include "vtkContextItem.h"
#include "vtkRemotingViewsModule.h" // needed for export macro

class vtkAxis;

class VTKREMOTINGVIEWS_EXPORT vtkMultiSliceContextItem : public vtkContextItem
{
public:
  static vtkMultiSliceContextItem* New();
  vtkTypeMacro(vtkMultiSliceContextItem, vtkContextItem);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  bool Paint(vtkContext2D* painter) override;

  vtkAxis* GetAxis();

  void SetActiveSize(int size);

  void SetEdgeMargin(int margin);

  int GetActiveSliceIndex();

  bool Hit(const vtkContextMouseEvent& mouse) override;

  bool MouseButtonPressEvent(const vtkContextMouseEvent& mouse) override;

  bool MouseButtonReleaseEvent(const vtkContextMouseEvent& mouse) override;

  bool MouseDoubleClickEvent(const vtkContextMouseEvent& mouse) override;

  bool MouseMoveEvent(const vtkContextMouseEvent& mouse) override;

  const double* GetVisibleSlices(int& nbSlices) const;

  const double* GetSlices(int& nbSlices) const;

  void SetSlices(double* values, bool* visibility, int numberOfSlices);

  double GetSliceValue(int sliceIndex);

  int GetNumberOfSlices();

  // Events files when slices are modified by interaction.
  enum
  {
    AddSliceEvent = vtkCommand::UserEvent + 1,
    RemoveSliceEvent = vtkCommand::UserEvent + 2,
    ModifySliceEvent = vtkCommand::UserEvent + 3
  };

protected:
  double ScreenToRange(float position);
  double ComputeEpsilon(int numberOfPixel = 5);
  void forceRender();

  vtkMultiSliceContextItem();
  ~vtkMultiSliceContextItem() override;

private:
  vtkMultiSliceContextItem(const vtkMultiSliceContextItem&) = delete;
  void operator=(const vtkMultiSliceContextItem&) = delete;

  struct vtkInternal;
  vtkInternal* Internal;
};

#endif