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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkGraphLayoutStrategy.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.
=========================================================================*/
/*----------------------------------------------------------------------------
Copyright (c) Sandia Corporation
See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.
----------------------------------------------------------------------------*/
// .NAME vtkGraphLayoutStrategy - abstract superclass for all graph layout strategies
//
// .SECTION Description
// All graph layouts should subclass from this class. vtkGraphLayoutStrategy
// works as a plug-in to the vtkGraphLayout algorithm. The Layout()
// function should perform some reasonable "chunk" of the layout.
// This allows the user to be able to see the progress of the layout.
// Use IsLayoutComplete() to tell the user when there is no more layout
// to perform.
//
// .SECTION Thanks
// Thanks to Brian Wylie from Sandia National Laboratories for adding incremental
// layout capabilities.
#ifndef __vtkGraphLayoutStrategy_h
#define __vtkGraphLayoutStrategy_h
#include "vtkObject.h"
class vtkAbstractGraph;
class VTK_INFOVIS_EXPORT vtkGraphLayoutStrategy : public vtkObject
{
public:
vtkTypeRevisionMacro(vtkGraphLayoutStrategy,vtkObject);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Setting the graph for the layout strategy
virtual void SetGraph(vtkAbstractGraph *graph);
// Description:
// This method allows the layout strategy to
// do initialization of data structures
// or whatever else it might want to do.
virtual void Initialize() {};
// Description:
// This is the layout method where the graph that was
// set in SetGraph() is laid out. The method can either
// entirely layout the graph or iteratively lay out the
// graph. If you have an iterative layout please implement
// the IsLayoutComplete() method.
virtual void Layout()=0;
// Description:
// If your concrete class is iterative than
// you should overload IsLayoutComplete()
// otherwise it simply returns 1 by default;
virtual int IsLayoutComplete() {return 1;}
// Description:
// Set/Get the field to use for the edge weights.
vtkSetStringMacro(EdgeWeightField);
vtkGetStringMacro(EdgeWeightField);
protected:
vtkGraphLayoutStrategy();
~vtkGraphLayoutStrategy();
vtkAbstractGraph *Graph;
char* EdgeWeightField;
private:
vtkGraphLayoutStrategy(const vtkGraphLayoutStrategy&); // Not implemented.
void operator=(const vtkGraphLayoutStrategy&); // Not implemented.
};
#endif
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