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98 lines
3.4 KiB
C++
98 lines
3.4 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkAreaLayoutStrategy.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/*-------------------------------------------------------------------------
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Copyright 2008 Sandia Corporation.
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Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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the U.S. Government retains certain rights in this software.
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-------------------------------------------------------------------------*/
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/**
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* @class vtkAreaLayoutStrategy
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* @brief abstract superclass for all area layout strategies
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*
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*
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* All subclasses of this class perform a area layout on a tree.
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* This involves assigning a region to each vertex in the tree,
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* and placing that information in a data array with four components per
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* tuple representing (innerRadius, outerRadius, startAngle, endAngle).
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*
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* Instances of subclasses of this class may be assigned as the layout
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* strategy to vtkAreaLayout
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*
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* @par Thanks:
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* Thanks to Jason Shepherd from Sandia National Laboratories
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* for help developing this class.
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*/
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#ifndef vtkAreaLayoutStrategy_h
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#define vtkAreaLayoutStrategy_h
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#include "vtkInfovisLayoutModule.h" // For export macro
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#include "vtkObject.h"
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class vtkTree;
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class vtkDataArray;
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class VTKINFOVISLAYOUT_EXPORT vtkAreaLayoutStrategy : public vtkObject
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{
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public:
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vtkTypeMacro(vtkAreaLayoutStrategy, vtkObject);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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/**
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* Perform the layout of the input tree, and store the sector
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* bounds of each vertex as a tuple in a data array.
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* For radial layout, this is
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* (innerRadius, outerRadius, startAngle, endAngle).
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* For rectangular layout, this is
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* (xmin, xmax, ymin, ymax).
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* The sizeArray may be nullptr, or may contain the desired
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* size of each vertex in the tree.
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*/
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virtual void Layout(vtkTree* inputTree, vtkDataArray* areaArray, vtkDataArray* sizeArray) = 0;
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// Modify edgeLayoutTree to have point locations appropriate
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// for routing edges on a graph overlaid on the tree.
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// Layout() is called before this method, so inputTree will contain the
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// layout locations.
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// If you do not override this method,
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// the edgeLayoutTree vertex locations are the same as the input tree.
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virtual void LayoutEdgePoints(
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vtkTree* inputTree, vtkDataArray* areaArray, vtkDataArray* sizeArray, vtkTree* edgeLayoutTree);
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/**
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* Returns the vertex id that contains pnt (or -1 if no one contains it)
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*/
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virtual vtkIdType FindVertex(vtkTree* tree, vtkDataArray* array, float pnt[2]) = 0;
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// Descripiton:
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// The amount that the regions are shrunk as a value from
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// 0.0 (full size) to 1.0 (shrink to nothing).
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vtkSetClampMacro(ShrinkPercentage, double, 0.0, 1.0);
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vtkGetMacro(ShrinkPercentage, double);
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protected:
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vtkAreaLayoutStrategy();
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~vtkAreaLayoutStrategy() override;
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double ShrinkPercentage;
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private:
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vtkAreaLayoutStrategy(const vtkAreaLayoutStrategy&) = delete;
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void operator=(const vtkAreaLayoutStrategy&) = delete;
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};
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#endif
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