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/*=========================================================================
Program: Visualization Toolkit
Module: vtkEdgeListIterator.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 vtkEdgeListIterator - Iterates through all edges in a graph.
//
// .SECTION Description
// vtkEdgeListIterator iterates through all the edges in a graph, by traversing
// the adjacency list for each vertex. You may instantiate this class directly
// and call SetGraph() to traverse a certain graph. You may also call the graph's
// GetEdges() method to set up the iterator for a certain graph.
//
// Note that this class does NOT guarantee that the edges will be processed in
// order of their ids (i.e. it will not necessarily return edge 0, then edge 1,
// etc.).
//
// .SECTION See Also
// vtkGraph
#ifndef __vtkEdgeListIterator_h
#define __vtkEdgeListIterator_h
#include "vtkObject.h"
class vtkGraph;
class vtkGraphEdge;
//BTX
struct vtkEdgeType;
struct vtkOutEdgeType;
//ETX
class VTK_FILTERING_EXPORT vtkEdgeListIterator : public vtkObject
{
public:
static vtkEdgeListIterator *New();
vtkTypeMacro(vtkEdgeListIterator, vtkObject);
void PrintSelf(ostream& os, vtkIndent indent);
vtkGetObjectMacro(Graph, vtkGraph);
virtual void SetGraph(vtkGraph *graph);
//BTX
// Description:
// Returns the next edge in the graph.
vtkEdgeType Next();
//ETX
// Description:
// Just like Next(), but
// returns heavy-weight vtkGraphEdge object instead of
// the vtkEdgeType struct, for use with wrappers.
// The graph edge is owned by this iterator, and changes
// after each call to NextGraphEdge().
vtkGraphEdge *NextGraphEdge();
// Description:
// Whether this iterator has more edges.
bool HasNext();
protected:
vtkEdgeListIterator();
~vtkEdgeListIterator();
void Increment();
vtkGraph *Graph;
const vtkOutEdgeType *Current;
const vtkOutEdgeType *End;
vtkIdType Vertex;
bool Directed;
vtkGraphEdge *GraphEdge;
private:
vtkEdgeListIterator(const vtkEdgeListIterator&); // Not implemented.
void operator=(const vtkEdgeListIterator&); // Not implemented.
};
#endif
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