vtkEmulatedTimeAlgorithm.h

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// SPDX-FileCopyrightText: Copyright (c) Kitware Inc.
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkEmulatedTimeAlgorithm_h
#define vtkEmulatedTimeAlgorithm_h

#include "vtkAlgorithm.h"

#include <vector>

#include "vtkPVVTKExtensionsCoreModule.h"

class VTKPVVTKEXTENSIONSCORE_EXPORT vtkEmulatedTimeAlgorithm : public vtkAlgorithm
{
public:
  vtkTypeMacro(vtkEmulatedTimeAlgorithm, vtkAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  virtual bool GetNeedsUpdate(double time);

  void Modified() override;

  vtkGetVector2Macro(TimeRange, double);

  vtkTypeBool ProcessRequest(
    vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;

protected:
  vtkEmulatedTimeAlgorithm();
  ~vtkEmulatedTimeAlgorithm() override;

  virtual int RequestInformation(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) = 0;

  virtual int RequestData(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) = 0;

  virtual int RequestUpdateExtent(vtkInformation*, vtkInformationVector**, vtkInformationVector*);

private:
  bool NeedsUpdate = false;
  bool NeedsInitialization = true;
  double RequestedTime = 0.;
  double TimeRange[2];
  std::vector<double> TimeSteps;

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

#endif