Common/vtkCollectionIterator.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkCollectionIterator.h,v $
  Language:  C++

  Copyright (c) 1993-2002 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 __vtkCollectionIterator_h
#define __vtkCollectionIterator_h

#include "vtkObject.h"

class vtkCollection;
class vtkCollectionElement;

class VTK_COMMON_EXPORT vtkCollectionIterator : public vtkObject
{
public:
  vtkTypeRevisionMacro(vtkCollectionIterator,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);
  static vtkCollectionIterator* New();
  

  virtual void SetCollection(vtkCollection*);
  vtkGetObjectMacro(Collection, vtkCollection);
  
  void InitTraversal() { this->GoToFirstItem(); }
  
  void GoToFirstItem();
  
  void GoToNextItem();
  
  int IsDoneWithTraversal();
  
  vtkObject* GetObject();
  
protected:
  vtkCollectionIterator();
  ~vtkCollectionIterator();
  
  // The collection over which we are iterating.
  vtkCollection* Collection;
  
  // The current iterator position.
  vtkCollectionElement* Element;
  
private:
  vtkCollectionIterator(const vtkCollectionIterator&); // Not implemented
  void operator=(const vtkCollectionIterator&); // Not implemented
};

#endif

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