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/*=========================================================================
Program: Visualization Toolkit
Module: vtkLabelHierarchyCompositeIterator.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.
=========================================================================*/
/*-------------------------------------------------------------------------
Copyright 2008 Sandia Corporation.
Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/
// .NAME vtkLabelHierarchyCompositeIterator - Iterator over sub-iterators
//
// .SECTION Description
// Iterates over child iterators in a round-robin order. Each iterator may
// have its own count, which is the number of times it is repeated until
// moving to the next iterator.
//
// For example, if you initialize the iterator with
// <pre>
// it->AddIterator(A, 1);
// it->AddIterator(B, 3);
// </pre>
// The order of iterators will be A,B,B,B,A,B,B,B,...
#ifndef vtkLabelHierarchyCompositeIterator_h
#define vtkLabelHierarchyCompositeIterator_h
#include "vtkRenderingLabelModule.h" // For export macro
#include "vtkLabelHierarchyIterator.h"
class vtkIdTypeArray;
class vtkLabelHierarchy;
class vtkPolyData;
class VTKRENDERINGLABEL_EXPORT vtkLabelHierarchyCompositeIterator : public vtkLabelHierarchyIterator
{
public:
vtkTypeMacro(vtkLabelHierarchyCompositeIterator, vtkLabelHierarchyIterator);
virtual void PrintSelf(ostream& os, vtkIndent indent);
static vtkLabelHierarchyCompositeIterator* New();
// Description:
// Adds a label iterator to this composite iterator.
// The second optional argument is the number of times to repeat the iterator
// before moving to the next one round-robin style. Default is 1.
virtual void AddIterator(vtkLabelHierarchyIterator* it)
{ this->AddIterator(it, 1); }
virtual void AddIterator(vtkLabelHierarchyIterator* it, int count);
// Description:
// Remove all iterators from this composite iterator.
virtual void ClearIterators();
// Description:
// Initializes the iterator. lastLabels is an array holding labels
// which should be traversed before any other labels in the hierarchy.
// This could include labels placed during a previous rendering or
// a label located under the mouse pointer. You may pass a null pointer.
virtual void Begin( vtkIdTypeArray* );
// Description:
// Advance the iterator.
virtual void Next();
// Description:
// Returns true if the iterator is at the end.
virtual bool IsAtEnd();
// Description:
// Retrieves the current label id.
virtual vtkIdType GetLabelId();
// Description:
// Retrieve the current label hierarchy.
virtual vtkLabelHierarchy* GetHierarchy();
// Description:
// Retrieve the coordinates of the center of the current hierarchy node
// and the size of the node.
// Nodes are n-cubes, so the size is the length of any edge of the cube.
// This is used by BoxNode().
virtual void GetNodeGeometry( double ctr[3], double& size );
// Description:
// Not implemented.
virtual void BoxNode() { }
// Description:
// Not implemented.
virtual void BoxAllNodes( vtkPolyData* ) { }
protected:
vtkLabelHierarchyCompositeIterator();
virtual ~vtkLabelHierarchyCompositeIterator();
//BTX
class Internal;
Internal* Implementation;
//ETX
private:
vtkLabelHierarchyCompositeIterator( const vtkLabelHierarchyCompositeIterator& ); // Not implemented.
void operator = ( const vtkLabelHierarchyCompositeIterator& ); // Not implemented.
};
#endif // vtkLabelHierarchyCompositeIterator_h
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