text: /*=========================================================================
  
    Program:   Visualization Toolkit
    Module:    vtkActor2DCollection.h
  
    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 vtkActor2DCollection -  a list of 2D actors
  // .SECTION Description
  // vtkActor2DCollection is a subclass of vtkCollection.  vtkActor2DCollection
  // maintains a collection of vtkActor2D objects that is sorted by layer
  // number, with lower layer numbers at the start of the list.  This allows
  // the vtkActor2D objects to be rendered in the correct order.
  
  // .SECTION See Also
  // vtkActor2D vtkCollection
  
  #ifndef vtkActor2DCollection_h
  #define vtkActor2DCollection_h
  
  #include "vtkRenderingCoreModule.h" // For export macro
  #include "vtkPropCollection.h"
  
  #include "vtkActor2D.h" // Needed for inline methods
  
  class vtkViewport;
  
  class VTKRENDERINGCORE_EXPORT vtkActor2DCollection : public vtkPropCollection
  {
   public:
    // Description:
    // Desctructor for the vtkActor2DCollection class. This removes all
    // objects from the collection.
    static vtkActor2DCollection *New();
  
    vtkTypeMacro(vtkActor2DCollection,vtkPropCollection);
  
    // Description:
    // Sorts the vtkActor2DCollection by layer number.  Smaller layer
    // numbers are first.  Layer numbers can be any integer value.
    void Sort();
  
    // Description:
    // Add an actor to the list.  The new actor is inserted in the list
    // according to it's layer number.
    void AddItem(vtkActor2D *a);
  
    // Description:
    // Standard Collection methods
    int IsItemPresent(vtkActor2D *a);
    vtkActor2D *GetNextActor2D();
    vtkActor2D *GetLastActor2D();
  
    // Description:
   // Access routines that are provided for compatibility with previous
   // version of VTK.  Please use the GetNextActor2D(), GetLastActor2D()
   // variants where possible.
   vtkActor2D *GetNextItem();
   vtkActor2D *GetLastItem();
  
  
    // Description:
    // Sort and then render the collection of 2D actors.
    void RenderOverlay(vtkViewport* viewport);
  
    // Description:
    // Reentrant safe way to get an object in a collection. Just pass the
    // same cookie back and forth.
    vtkActor2D *GetNextActor2D(vtkCollectionSimpleIterator &cookie) {
      return static_cast<vtkActor2D *>(this->GetNextItemAsObject(cookie));};
  
  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(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
  
  
  
  
  
  // VTK-HeaderTest-Exclude: vtkActor2DCollection.h
  