vtkCosmicTreeLayoutStrategy.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkCosmicTreeLayoutStrategy.h

=========================================================================*/
/*----------------------------------------------------------------------------
 Copyright (c) Sandia Corporation
 See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.
----------------------------------------------------------------------------*/
#ifndef vtkCosmicTreeLayoutStrategy_h
#define vtkCosmicTreeLayoutStrategy_h

#include "vtkInfovisLayoutModule.h" // For export macro
#include "vtkGraphLayoutStrategy.h"

class vtkDoubleArray;
class vtkDataArray;
class vtkPoints;
class vtkTree;

class VTKINFOVISLAYOUT_EXPORT vtkCosmicTreeLayoutStrategy : public vtkGraphLayoutStrategy
{
public:
  static vtkCosmicTreeLayoutStrategy* New();
  virtual void PrintSelf( ostream& os, vtkIndent indent );
  vtkTypeMacro(vtkCosmicTreeLayoutStrategy,vtkGraphLayoutStrategy);

  virtual void Layout();


  vtkSetMacro(SizeLeafNodesOnly,int);
  vtkGetMacro(SizeLeafNodesOnly,int);
  vtkBooleanMacro(SizeLeafNodesOnly,int);


  vtkSetMacro(LayoutDepth,int);
  vtkGetMacro(LayoutDepth,int);


  vtkSetMacro(LayoutRoot,vtkIdType);
  vtkGetMacro(LayoutRoot,vtkIdType);


  vtkSetStringMacro(NodeSizeArrayName);
  vtkGetStringMacro(NodeSizeArrayName);

protected:

  enum RadiusMode
  {
    NONE,     
    LEAVES,   
    ALL       
  };

  vtkCosmicTreeLayoutStrategy();
  virtual ~vtkCosmicTreeLayoutStrategy();

  void LayoutChildren(
    vtkTree* tree, vtkPoints* newPoints, vtkDoubleArray* radii, vtkDoubleArray* scale,
    vtkIdType root, int depth, RadiusMode mode );

  void OffsetChildren(
    vtkTree* tree, vtkPoints* pts, vtkDoubleArray* radii, vtkDoubleArray* scale,
    double parent[4], vtkIdType root, int depth, RadiusMode mode );

  vtkDoubleArray* CreateRadii( vtkIdType numVertices, double initialValue, vtkDataArray* inputRadii );

  vtkDoubleArray* CreateScaleFactors( vtkIdType numVertices );

  int SizeLeafNodesOnly;
  int LayoutDepth;
  vtkIdType LayoutRoot;
  char* NodeSizeArrayName;

private:
  vtkCosmicTreeLayoutStrategy( const vtkCosmicTreeLayoutStrategy& ) VTK_DELETE_FUNCTION;
  void operator = ( const vtkCosmicTreeLayoutStrategy& ) VTK_DELETE_FUNCTION;
};

#endif // vtkCosmicTreeLayoutStrategy_h