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/*=========================================================================
Program: Visualization Toolkit
Module: vtkGraphLayout.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 vtkGraphLayout - layout a graph in 2 or 3 dimensions
//
// .SECTION Description
// This class is a shell for many graph layout strategies which may be set
// using the SetLayoutStrategy() function. The layout strategies do the
// actual work.
//
// .SECION Thanks
// Thanks to Brian Wylie from Sandia National Laboratories for adding incremental
// layout capabilities.
#ifndef vtkGraphLayout_h
#define vtkGraphLayout_h
#include "vtkInfovisLayoutModule.h" // For export macro
#include "vtkGraphAlgorithm.h"
class vtkAbstractTransform;
class vtkEventForwarderCommand;
class vtkGraphLayoutStrategy;
class VTKINFOVISLAYOUT_EXPORT vtkGraphLayout : public vtkGraphAlgorithm
{
public:
static vtkGraphLayout *New();
vtkTypeMacro(vtkGraphLayout, vtkGraphAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// The layout strategy to use during graph layout.
void SetLayoutStrategy(vtkGraphLayoutStrategy *strategy);
vtkGetObjectMacro(LayoutStrategy, vtkGraphLayoutStrategy);
// Description:
// Ask the layout algorithm if the layout is complete
virtual int IsLayoutComplete();
// Description:
// Get the modification time of the layout algorithm.
virtual unsigned long GetMTime();
// Description:
// Set the ZRange for the output data.
// If the initial layout is planar (i.e. all z coordinates are zero),
// the coordinates will be evenly spaced from 0.0 to ZRange.
// The default is zero, which has no effect.
vtkGetMacro(ZRange, double);
vtkSetMacro(ZRange, double);
// Description:
// Transform the graph vertices after the layout.
vtkGetObjectMacro(Transform, vtkAbstractTransform);
virtual void SetTransform(vtkAbstractTransform* t);
// Description:
// Whether to use the specified transform after layout.
vtkSetMacro(UseTransform, bool);
vtkGetMacro(UseTransform, bool);
vtkBooleanMacro(UseTransform, bool);
protected:
vtkGraphLayout();
~vtkGraphLayout();
vtkGraphLayoutStrategy* LayoutStrategy;
// Description:
// This intercepts events from the strategy object and re-emits them
// as if they came from the layout engine itself.
vtkEventForwarderCommand *EventForwarder;
int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
private:
vtkGraph* LastInput;
vtkGraph* InternalGraph;
unsigned long LastInputMTime;
bool StrategyChanged;
double ZRange;
vtkAbstractTransform* Transform;
bool UseTransform;
vtkGraphLayout(const vtkGraphLayout&); // Not implemented.
void operator=(const vtkGraphLayout&); // Not implemented.
};
#endif
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