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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkTreeIterator.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 vtkTreeIterator - Abstract class for iterator over a vtkTree.
//
// .SECTION Description
// The base class for tree iterators vtkTreeBFSIterator and vtkTreeDFSIterator.
//
// After setting up the iterator, the normal mode of operation is to
// set up a <code>while(iter->HasNext())</code> loop, with the statement
// <code>vtkIdType vertex = iter->Next()</code> inside the loop.
//
// .SECTION See Also
// vtkTreeBFSIterator vtkTreeDFSIterator
#ifndef vtkTreeIterator_h
#define vtkTreeIterator_h
#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkObject.h"
class vtkTree;
class VTKCOMMONDATAMODEL_EXPORT vtkTreeIterator : public vtkObject
{
public:
vtkTypeMacro(vtkTreeIterator, vtkObject);
virtual void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Set/get the graph to iterate over.
void SetTree(vtkTree* graph);
vtkGetMacro(Tree, vtkTree*);
// Description:
// The start vertex of the traversal.
// The tree iterator will only iterate over the subtree rooted at vertex.
// If not set (or set to a negative value), starts at the root of the tree.
void SetStartVertex(vtkIdType vertex);
vtkGetMacro(StartVertex, vtkIdType);
// Description:
// The next vertex visited in the graph.
vtkIdType Next();
// Description:
// Return true when all vertices have been visited.
bool HasNext();
// Description:
// Reset the iterator to its start vertex.
void Restart();
protected:
vtkTreeIterator();
~vtkTreeIterator();
virtual void Initialize() = 0;
virtual vtkIdType NextInternal() = 0;
vtkTree* Tree;
vtkIdType StartVertex;
vtkIdType NextId;
private:
vtkTreeIterator(const vtkTreeIterator &); // Not implemented.
void operator=(const vtkTreeIterator &); // Not implemented.
};
#endif
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