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

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

  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 vtkImageProgressIterator - a simple image iterator with progress
// .SECTION Description
// This is a simple image iterator that can be used to iterate over an 
// image. Typically used to iterate over the output image

// .SECTION See also
// vtkImageData vtkImageIterator

#ifndef __vtkImageProgressIterator_h
#define __vtkImageProgressIterator_h

#include "vtkImageIterator.h"
class vtkAlgorithm;

template<class DType>
class vtkImageProgressIterator : public vtkImageIterator<DType> 
{
public:
  typedef vtkImageIterator<DType> Superclass;

  // Description:
  // Create a progress iterator for the provided image data
  // and extent to iterate over. The passes progress object will
  // receive any UpdateProgress calls if the thread id is zero
  vtkImageProgressIterator(vtkImageData *imgd, int *ext, 
                           vtkAlgorithm *po, int id);

  // Description:
  // Move the iterator to the next span, may call UpdateProgress on the
  // filter (vtkAlgorithm)
  void NextSpan();

  // Description:
  // Overridden from vtkImageIterator to check AbortExecute on the
  // filter (vtkAlgorithm).
  int IsAtEnd();

protected:
  vtkAlgorithm     *Algorithm;
  unsigned long     Count;
  unsigned long     Count2;
  unsigned long     Target;
  int               ID;
};

#ifdef VTK_NO_EXPLICIT_TEMPLATE_INSTANTIATION
#include "vtkImageProgressIterator.txx"
#endif

#endif