---

Common/vtkActor2DCollection.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkActor2DCollection.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 __vtkActor2DCollection_h
#define __vtkActor2DCollection_h

#include "vtkPropCollection.h"

#include "vtkActor2D.h" // Needed for inline methods

class vtkViewport;

class VTK_COMMON_EXPORT vtkActor2DCollection : public vtkPropCollection
{
 public:
  static vtkActor2DCollection *New();

  vtkTypeRevisionMacro(vtkActor2DCollection,vtkPropCollection);

  void Sort();
  
  void AddItem(vtkActor2D *a);


  int IsItemPresent(vtkActor2D *a);
  vtkActor2D *GetNextActor2D();
  vtkActor2D *GetLastActor2D();


 vtkActor2D *GetNextItem();
 vtkActor2D *GetLastItem();

    
  void RenderOverlay(vtkViewport* viewport);


protected:
  vtkActor2DCollection() {};
  ~vtkActor2DCollection();

  virtual void DeleteElement(vtkCollectionElement *); 

private:
  // hide the standard AddItem from the user and the compiler.
  void AddItem(vtkObject *o) { this->vtkCollection::AddItem(o); };
  void AddItem(vtkProp *o) { this->vtkPropCollection::AddItem(o); };
  int IsItemPresent(vtkObject *o) { return this->vtkCollection::IsItemPresent(o); };

private:
  vtkActor2DCollection(const vtkActor2DCollection&);  // Not implemented.
  void operator=(const vtkActor2DCollection&);  // Not implemented.
};

inline int vtkActor2DCollection::IsItemPresent(vtkActor2D *a) 
{
  return this->vtkCollection::IsItemPresent((vtkObject *)a);
}

inline vtkActor2D *vtkActor2DCollection::GetNextActor2D() 
{ 
  return static_cast<vtkActor2D *>(this->GetNextItemAsObject());
}

inline vtkActor2D *vtkActor2DCollection::GetLastActor2D() 
{ 
  if ( this->Bottom == NULL )
    {
    return NULL;
    }
  else
    {
    return static_cast<vtkActor2D *>(this->Bottom->Item);
    }
}

inline vtkActor2D *vtkActor2DCollection::GetNextItem() 
{ 
  return this->GetNextActor2D();
}

inline vtkActor2D *vtkActor2DCollection::GetLastItem() 
{
  return this->GetLastActor2D();
}

#endif

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