itkShapedNeighborhoodIterator.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkShapedNeighborhoodIterator.h,v $
  Language:  C++
  Date:      $Date: 2003/01/09 21:28:00 $
  Version:   $Revision: 1.2 $

  Copyright (c) 2002 Insight Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/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 notices for more information.

=========================================================================*/
#ifndef __itkShapedNeighborhoodIterator_h
#define __itkShapedNeighborhoodIterator_h

#include <vector>
#include <list>
#include "itkConstShapedNeighborhoodIterator.h"

namespace itk {

template<class TImage,  class TBoundaryCondition
                       = ZeroFluxNeumannBoundaryCondition<TImage> >
class ITK_EXPORT ShapedNeighborhoodIterator
  :  public ConstShapedNeighborhoodIterator<TImage, TBoundaryCondition>
{
public:
  typedef typename TImage::InternalPixelType InternalPixelType;
  typedef typename TImage::PixelType PixelType;
    
  itkStaticConstMacro(Dimension, unsigned int, TImage::ImageDimension);
  
  typedef ShapedNeighborhoodIterator Self;
  typedef ConstShapedNeighborhoodIterator<TImage, TBoundaryCondition> Superclass;

  typedef typename Superclass::OffsetType OffsetType;
  typedef typename OffsetType::OffsetValueType OffsetValueType;
  typedef typename Superclass::RadiusType RadiusType;  
  typedef typename Superclass::SizeType SizeType;
  typedef typename Superclass::SizeValueType SizeValueType;
  typedef typename Superclass::ConstIterator ConstIterator;
  typedef typename Superclass::IndexListType  IndexListType;
  typedef typename Superclass::BoundaryConditionType BoundaryConditionType;
  typedef typename Superclass::ImageBoundaryConditionPointerType
  ImageBoundaryConditionPointerType;
  
  typedef TImage ImageType;
  typedef typename TImage::RegionType RegionType;
  typedef Index<itkGetStaticConstMacro(Dimension)> IndexType;
  typedef typename IndexType::IndexValueType IndexValueType;
  typedef Neighborhood<PixelType, itkGetStaticConstMacro(Dimension)> NeighborhoodType;

  struct Iterator : public ConstIterator
  {
    Iterator() {}
    Iterator(Self *s) : ConstIterator(s) {}

    ~Iterator() {}
    const Iterator &operator=(const Iterator &o)
    {
      ConstIterator::operator=(o);
      return *this;
    }
    
    // Promote to public
    void Set(const PixelType &v) const
    { ConstIterator::ProtectedSet(v); }

  };
  
  ShapedNeighborhoodIterator();

  virtual ~ShapedNeighborhoodIterator() {}

  ShapedNeighborhoodIterator( const ShapedNeighborhoodIterator & );

  ShapedNeighborhoodIterator(const SizeType &radius,
                       const ImageType * ptr,
                       const RegionType &region
                                  ) : Superclass (radius, const_cast<ImageType*>(ptr),
                                                  region)
  {
    m_BeginIterator = Iterator(this);
    m_EndIterator = Iterator(this);
    m_EndIterator.GoToEnd();
  }
  
  // Expose the following methods from the superclass.  This is a restricted
  // subset of the methods available for ConstNeighborhoodIterator.
  Superclass::SetPixel;
  
  Self &operator=(const Self& orig)
  { return Superclass::operator=(orig); }

  virtual void PrintSelf(std::ostream &, Indent) const;

  Iterator &Begin() {    return m_BeginIterator;  }
  Iterator &End() {   return m_EndIterator; }

  const ConstIterator &End() const
  {    return m_ConstEndIterator;  }

  void ClearActiveList()
  {
    Superclass::ClearActiveList();
    m_EndIterator.GoToEnd();
    m_BeginIterator.GoToBegin();
  }
  
protected:
  void ActivateIndex(const unsigned int n)
  {
    Superclass::ActivateIndex(n);
    m_EndIterator.GoToEnd();
    m_BeginIterator.GoToBegin();
  }

  void DeactivateIndex(const unsigned int n)
  {
    Superclass::DeactivateIndex(n);
    m_EndIterator.GoToEnd();
    m_BeginIterator.GoToBegin();
  }

  
  Iterator m_EndIterator;
  Iterator m_BeginIterator;
};

} // namespace itk


#ifndef ITK_MANUAL_INSTANTIATION
#include "itkShapedNeighborhoodIterator.txx"
#endif

#endif

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