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vtkTreeMapLayout.cxx
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vtkTreeMapLayout.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkTreeMapLayout.cxx
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.
-------------------------------------------------------------------------*/
#include "vtkTreeMapLayout.h"
#include "vtkAdjacentVertexIterator.h"
#include "vtkCellArray.h"
#include "vtkCellData.h"
#include "vtkDataArray.h"
#include "vtkFloatArray.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkTree.h"
#include "vtkTreeMapLayoutStrategy.h"
vtkStandardNewMacro(vtkTreeMapLayout);
vtkTreeMapLayout::vtkTreeMapLayout()
{
this->RectanglesFieldName = 0;
this->LayoutStrategy = 0;
this->SetRectanglesFieldName("area");
this->SetSizeArrayName("size");
}
vtkTreeMapLayout::~vtkTreeMapLayout()
{
this->SetRectanglesFieldName(0);
if (this->LayoutStrategy)
{
this->LayoutStrategy->Delete();
}
}
vtkCxxSetObjectMacro(vtkTreeMapLayout, LayoutStrategy, vtkTreeMapLayoutStrategy);
int vtkTreeMapLayout::RequestData(
vtkInformation *vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
if (this->LayoutStrategy == NULL)
{
vtkErrorMacro(<< "Layout strategy must be non-null.");
return 0;
}
if (this->RectanglesFieldName == NULL)
{
vtkErrorMacro(<< "Rectangles field name must be non-null.");
return 0;
}
// get the info objects
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
// Storing the inputTree and outputTree handles
vtkTree *inputTree = vtkTree::SafeDownCast(
inInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkTree *outputTree = vtkTree::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
// Copy the input into the output
outputTree->ShallowCopy(inputTree);
// Add the 4-tuple array that will store the min,max xy coords
vtkFloatArray *coordsArray = vtkFloatArray::New();
coordsArray->SetName(this->RectanglesFieldName);
coordsArray->SetNumberOfComponents(4);
coordsArray->SetNumberOfTuples(inputTree->GetNumberOfVertices());
vtkDataSetAttributes *data = outputTree->GetVertexData();
data->AddArray(coordsArray);
coordsArray->Delete();
// Add the 4-tuple array that will store the min,max xy coords
vtkDataArray *sizeArray = this->GetInputArrayToProcess(0, inputTree);
if (!sizeArray)
{
vtkErrorMacro("Size array not found.");
return 0;
}
// Okay now layout the tree :)
this->LayoutStrategy->Layout(inputTree, coordsArray, sizeArray);
return 1;
}
void vtkTreeMapLayout::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "RectanglesFieldName: " << (this->RectanglesFieldName ? this->RectanglesFieldName : "(none)") << endl;
os << indent << "LayoutStrategy: " << (this->LayoutStrategy ? "" : "(none)") << endl;
if (this->LayoutStrategy)
{
this->LayoutStrategy->PrintSelf(os, indent.GetNextIndent());
}
}
vtkIdType vtkTreeMapLayout::FindVertex(float pnt[2], float *binfo)
{
// Do we have an output?
vtkTree* otree = this->GetOutput();
if (!otree)
{
vtkErrorMacro(<< "Could not get output tree.");
return -1;
}
//Get the four tuple array for the points
vtkDataArray *array = otree->GetVertexData()->
GetArray(this->RectanglesFieldName);
if (!array)
{
// vtkErrorMacro(<< "Output Tree does not have box information.");
return -1;
}
// Check to see that we are in the dataset at all
float blimits[4];
vtkIdType vertex = otree->GetRoot();
vtkFloatArray *boxInfo = vtkFloatArray::SafeDownCast(array);
// Now try to find the vertex that contains the point
boxInfo->GetTupleValue(vertex, blimits); // Get the extents of the root
if ((pnt[0] < blimits[0]) || (pnt[0] > blimits[1]) ||
(pnt[1] < blimits[2]) || (pnt[1] > blimits[3]))
{
// Point is not in the tree at all
return -1;
}
// Now traverse the children to try and find
// the vertex that contains the point
vtkIdType child;
if (binfo)
{
binfo[0] = blimits[0];
binfo[1] = blimits[1];
binfo[2] = blimits[2];
binfo[3] = blimits[3];
}
vtkAdjacentVertexIterator *it = vtkAdjacentVertexIterator::New();
otree->GetAdjacentVertices(vertex, it);
while (it->HasNext())
{
child = it->Next();
boxInfo->GetTupleValue(child, blimits); // Get the extents of the child
if ((pnt[0] < blimits[0]) || (pnt[0] > blimits[1]) ||
(pnt[1] < blimits[2]) || (pnt[1] > blimits[3]))
{
continue;
}
// If we are here then the point is contained by the child
// So recurse down the children of this vertex
vertex = child;
otree->GetAdjacentVertices(vertex, it);
}
it->Delete();
return vertex;
}
void vtkTreeMapLayout::GetBoundingBox(vtkIdType id, float *binfo)
{
// Do we have an output?
vtkTree* otree = this->GetOutput();
if (!otree)
{
vtkErrorMacro(<< "Could not get output tree.");
return;
}
//Get the four tuple array for the points
vtkDataArray *array = otree->GetVertexData()->
GetArray(this->RectanglesFieldName);
if (!array)
{
// vtkErrorMacro(<< "Output Tree does not have box information.");
return;
}
vtkFloatArray *boxInfo = vtkFloatArray::SafeDownCast(array);
boxInfo->GetTupleValue(id, binfo);
}
unsigned long vtkTreeMapLayout::GetMTime()
{
unsigned long mTime = this->Superclass::GetMTime();
unsigned long time;
if (this->LayoutStrategy != NULL)
{
time = this->LayoutStrategy->GetMTime();
mTime = (time > mTime ? time : mTime);
}
return mTime;
}