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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkActorCollection.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 vtkActorCollection - a list of actors
// .SECTION Description
// vtkActorCollection represents and provides methods to manipulate a list of
// actors (i.e., vtkActor and subclasses). The list is unsorted and duplicate
// entries are not prevented.

// .SECTION see also
// vtkActor vtkCollection 

#ifndef __vtkActorCollection_h
#define __vtkActorCollection_h

#include "vtkPropCollection.h"
#include "vtkActor.h" // For inline methods

class vtkProperty;

class VTK_RENDERING_EXPORT vtkActorCollection : public vtkPropCollection
{
public:
  static vtkActorCollection *New();
  vtkTypeRevisionMacro(vtkActorCollection,vtkPropCollection);
  virtual void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Add an actor to the list.
  void AddItem(vtkActor *a);

  // Description:
  // Get the next actor in the list.
  vtkActor *GetNextActor();

  // Description:
  // Get the last actor in the list.
  vtkActor *GetLastActor();

  // Description:
  // Access routines that are provided for compatibility with previous
  // version of VTK.  Please use the GetNextActor(), GetLastActor() variants
  // where possible.
  vtkActor *GetNextItem();
  vtkActor *GetLastItem();

  // Description:
  // Apply properties to all actors in this collection.
  void ApplyProperties(vtkProperty *p); 

  //BTX
  // Description: 
  // Reentrant safe way to get an object in a collection. Just pass the
  // same cookie back and forth. 
  vtkActor *GetNextActor(vtkCollectionSimpleIterator &cookie) {
    return static_cast<vtkActor *>(this->GetNextItemAsObject(cookie));};
  //ETX

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

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); };

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

inline void vtkActorCollection::AddItem(vtkActor *a) 
{
  this->vtkCollection::AddItem(a);
}

inline vtkActor *vtkActorCollection::GetNextActor() 
{ 
  return static_cast<vtkActor *>(this->GetNextItemAsObject());
}

inline vtkActor *vtkActorCollection::GetLastActor() 
{ 
  if ( this->Bottom == NULL )
    {
    return NULL;
    }
  else
    {
    return static_cast<vtkActor *>(this->Bottom->Item);
    }
}

inline vtkActor *vtkActorCollection::GetNextItem() 
{ 
  return this->GetNextActor();
}

inline vtkActor *vtkActorCollection::GetLastItem() 
{
  return this->GetLastActor();
}

#endif





