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/*=========================================================================
Program: Visualization Toolkit
Module: vtkTreeOrbitLayoutStrategy.h
=========================================================================*/
/*----------------------------------------------------------------------------
Copyright (c) Sandia Corporation
See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.
----------------------------------------------------------------------------*/
// .NAME vtkTreeOrbitLayoutStrategy - hierarchical orbital layout
//
// .SECTION Description
// Assigns points to the nodes of a tree to an orbital layout. Each parent
// is orbited by its children, recursively.
// .SECTION Thanks
// Thanks to the galaxy for inspiring this layout strategy.
#ifndef vtkTreeOrbitLayoutStrategy_h
#define vtkTreeOrbitLayoutStrategy_h
#include "vtkInfovisLayoutModule.h" // For export macro
#include "vtkGraphLayoutStrategy.h"
class vtkPoints;
class vtkTree;
class VTKINFOVISLAYOUT_EXPORT vtkTreeOrbitLayoutStrategy : public vtkGraphLayoutStrategy
{
public:
static vtkTreeOrbitLayoutStrategy *New();
vtkTypeMacro(vtkTreeOrbitLayoutStrategy, vtkGraphLayoutStrategy);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Perform the orbital layout.
void Layout();
// Description:
// The spacing of orbital levels. Levels near zero give more space
// to levels near the root, while levels near one (the default)
// create evenly-spaced levels. Levels above one give more space
// to levels near the leaves.
vtkSetMacro(LogSpacingValue, double);
vtkGetMacro(LogSpacingValue, double);
// Description:
// The spacing of leaves. Levels near one evenly space leaves
// with no gaps between subtrees. Levels near zero creates
// large gaps between subtrees.
vtkSetClampMacro(LeafSpacing, double, 0.0, 1.0);
vtkGetMacro(LeafSpacing, double);
// Description:
// This is a magic number right now. Controls the radius
// of the child layout, all of this should be fixed at
// some point with a more logical layout. Defaults to .5 :)
vtkSetMacro(ChildRadiusFactor, double);
vtkGetMacro(ChildRadiusFactor, double);
protected:
vtkTreeOrbitLayoutStrategy();
~vtkTreeOrbitLayoutStrategy();
void OrbitChildren(vtkTree *t, vtkPoints *p, vtkIdType parent, double radius);
double LogSpacingValue;
double LeafSpacing;
double ChildRadiusFactor;
private:
vtkTreeOrbitLayoutStrategy(const vtkTreeOrbitLayoutStrategy&); // Not implemented.
void operator=(const vtkTreeOrbitLayoutStrategy&); // Not implemented.
};
#endif
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