vtkPVExtractSelection.h

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

  Program:   Visualization Toolkit
  Module:    vtkPVExtractSelection.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 vtkPVExtractSelection_h
#define vtkPVExtractSelection_h

#include "vtkExtractSelection.h"
#include "vtkPVVTKExtensionsExtractionModule.h" //needed for exports

class vtkSelectionNode;

class VTKPVVTKEXTENSIONSEXTRACTION_EXPORT vtkPVExtractSelection : public vtkExtractSelection
{
public:
  vtkTypeMacro(vtkPVExtractSelection, vtkExtractSelection);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  static const int OUTPUT_PORT_EXTRACTED_DATASET = 0;
  static const int OUTPUT_PORT_SELECTION_IDS = 1;
  static const int OUTPUT_PORT_SELECTION_ORIGINAL = 2;

  static vtkPVExtractSelection* New();

  void RemoveAllSelectionsInputs() { this->SetInputConnection(1, 0); }

protected:
  vtkPVExtractSelection();
  ~vtkPVExtractSelection() override;

  // sets up empty output dataset
  int RequestDataObject(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) override;

  // runs the algorithm and fills the output with results
  int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;

  int FillOutputPortInformation(int port, vtkInformation* info) override;

  vtkSelectionNode* LocateSelection(unsigned int level, unsigned int index, vtkSelection* sel);
  vtkSelectionNode* LocateSelection(unsigned int composite_index, vtkSelection* sel);

  vtkSmartPointer<vtkSelector> NewSelectionOperator(
    vtkSelectionNode::SelectionContent type) override;

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

  class vtkSelectionNodeVector;
  void RequestDataInternal(
    vtkSelectionNodeVector& outputs, vtkDataObject* dataObjectOutput, vtkSelectionNode* sel);

  // Returns the combined content type for the selection.
  int GetContentType(vtkSelection* sel);
};

#endif