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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.
-------------------------------------------------------------------------*/
/**
* @class vtkLabelHierarchyCompositeIterator
* @brief Iterator over sub-iterators
*
*
* 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 "vtkLabelHierarchyIterator.h"
#include "vtkRenderingLabelModule.h" // For export macro
VTK_ABI_NAMESPACE_BEGIN
class vtkIdTypeArray;
class vtkLabelHierarchy;
class vtkPolyData;
class VTKRENDERINGLABEL_EXPORT vtkLabelHierarchyCompositeIterator : public vtkLabelHierarchyIterator
{
public:
vtkTypeMacro(vtkLabelHierarchyCompositeIterator, vtkLabelHierarchyIterator);
void PrintSelf(ostream& os, vtkIndent indent) override;
static vtkLabelHierarchyCompositeIterator* New();
/**
* 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);
/**
* Remove all iterators from this composite iterator.
*/
virtual void ClearIterators();
/**
* 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.
*/
void Begin(vtkIdTypeArray*) override;
/**
* Advance the iterator.
*/
void Next() override;
/**
* Returns true if the iterator is at the end.
*/
bool IsAtEnd() override;
/**
* Retrieves the current label id.
*/
vtkIdType GetLabelId() override;
/**
* Retrieve the current label hierarchy.
*/
vtkLabelHierarchy* GetHierarchy() override;
/**
* 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().
*/
void GetNodeGeometry(double ctr[3], double& size) override;
/**
* Not implemented.
*/
void BoxNode() override {}
/**
* Not implemented.
*/
void BoxAllNodes(vtkPolyData*) override {}
protected:
vtkLabelHierarchyCompositeIterator();
~vtkLabelHierarchyCompositeIterator() override;
class Internal;
Internal* Implementation;
private:
vtkLabelHierarchyCompositeIterator(const vtkLabelHierarchyCompositeIterator&) = delete;
void operator=(const vtkLabelHierarchyCompositeIterator&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif // vtkLabelHierarchyCompositeIterator_h
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