itkNthElementImageAdaptor.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef __itkNthElementImageAdaptor_h
#define __itkNthElementImageAdaptor_h

#include "itkImageAdaptor.h"
#include "itkNthElementPixelAccessor.h"

namespace itk
{
// Create a helper class to help the SunPro CC compiler
// parse the templates for the NthElementImageAdaptor.
// This is used to define the Super class.  for NthElementImageAdaptor
template< class TImage, class TOutputPixelType >
class ITK_EXPORT NthElementImageAdaptorHelper
{
public:
  typedef  NthElementPixelAccessor<
    TOutputPixelType,
    typename TImage::PixelType > PixelAccessor;

  typedef  ImageAdaptor< TImage, PixelAccessor > Super;
};

template< class TImage, class TOutputPixelType >
class ITK_EXPORT NthElementImageAdaptor:
  public NthElementImageAdaptorHelper< TImage, TOutputPixelType >::Super
{
public:
  typedef NthElementImageAdaptor                                                   Self;
  typedef typename NthElementImageAdaptorHelper< TImage, TOutputPixelType >::Super Superclass;
  typedef SmartPointer< Self >                                                     Pointer;
  typedef SmartPointer< const Self >                                               ConstPointer;

  itkTypeMacro(NthElementImageAdaptor, ImageAdaptor);

  itkNewMacro(Self);

  void SelectNthElement(unsigned int nth)
  {
    this->GetPixelAccessor().SetElementNumber(nth);
    this->Modified();
  }

protected:
  NthElementImageAdaptor() {}
  virtual ~NthElementImageAdaptor() {}
private:
  NthElementImageAdaptor(const Self &); //purposely not implemented
  void operator=(const Self &);         //purposely not implemented
};
} // end namespace itk

#endif