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

  Program:   Visualization Toolkit
  Module:    vtkPExtractGrid.cxx

  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.

=========================================================================*/
// .NAME vtkPExtractGrid - Extract VOI and/or sub-sample a distributed
//  structured dataset.
//
// .SECTION Description
//  vtkPExtractGrid inherits from vtkExtractGrid and provides additional
//  functionality when dealing with a distributed dataset. Specifically, when
//  sub-sampling a dataset, a gap may be introduced between partitions. This
//  filter handles such cases correctly by growing the grid to the right to
//  close the gap.
//
// .SECTION See Also
//  vtkExtractGrid

#ifndef __vtkPExtractGrid_h
#define __vtkPExtractGrid_h

#include "vtkFiltersParallelMPIModule.h" // For export macro
#include "vtkExtractGrid.h"

// Forward declarations
class vtkMPIController;

class VTKFILTERSPARALLELMPI_EXPORT vtkPExtractGrid: public vtkExtractGrid
{
public:
    static vtkPExtractGrid* New();
    vtkTypeMacro(vtkPExtractGrid,vtkExtractGrid);
    void PrintSelf(ostream& os, vtkIndent indent);

protected:
    vtkPExtractGrid();
    virtual ~vtkPExtractGrid();

    // Standard VTK Pipeline methods
    virtual int RequestData(
        vtkInformation*, vtkInformationVector**,vtkInformationVector*);
    virtual int RequestInformation(
        vtkInformation*, vtkInformationVector**, vtkInformationVector*);
    virtual int RequestUpdateExtent(
        vtkInformation*, vtkInformationVector**, vtkInformationVector*);

    vtkMPIController* Controller;

private:
    vtkPExtractGrid(const vtkPExtractGrid&); // Not implemented.
    void operator=(const vtkPExtractGrid&);  // Not implemented.
};

#endif
