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/*=========================================================================
Program: Visualization Toolkit
Module: vtkEdgeLayout.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 (c) Sandia Corporation
See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.
----------------------------------------------------------------------------*/
#include "vtkEdgeLayout.h"
#include "vtkCellArray.h"
#include "vtkCellData.h"
#include "vtkDataArray.h"
#include "vtkEventForwarderCommand.h"
#include "vtkFloatArray.h"
#include "vtkEdgeLayoutStrategy.h"
#include "vtkMath.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkPoints.h"
vtkStandardNewMacro(vtkEdgeLayout);
// ----------------------------------------------------------------------
vtkEdgeLayout::vtkEdgeLayout()
{
this->LayoutStrategy = 0;
this->InternalGraph = NULL;
this->ObserverTag = 0;
this->EventForwarder = vtkEventForwarderCommand::New();
this->EventForwarder->SetTarget(this);
}
// ----------------------------------------------------------------------
vtkEdgeLayout::~vtkEdgeLayout()
{
if (this->LayoutStrategy)
{
this->LayoutStrategy->Delete();
}
if (this->InternalGraph)
{
this->InternalGraph->Delete();
}
this->EventForwarder->Delete();
}
// ----------------------------------------------------------------------
void vtkEdgeLayout::SetLayoutStrategy(vtkEdgeLayoutStrategy *strategy)
{
// This method is a cut and paste of vtkCxxSetObjectMacro
// except for the call to SetEdge in the middle :)
if (strategy != this->LayoutStrategy)
{
vtkEdgeLayoutStrategy *tmp = this->LayoutStrategy;
this->LayoutStrategy = strategy;
if (this->LayoutStrategy != NULL)
{
this->LayoutStrategy->Register(this);
this->ObserverTag =
this->LayoutStrategy->AddObserver(vtkCommand::ProgressEvent,
this->EventForwarder);
if (this->InternalGraph)
{
// Set the graph in the layout strategy
this->LayoutStrategy->SetGraph(this->InternalGraph);
}
}
if (tmp != NULL)
{
tmp->RemoveObserver(this->ObserverTag);
tmp->UnRegister(this);
}
this->Modified();
}
}
// ----------------------------------------------------------------------
unsigned long vtkEdgeLayout::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;
}
// ----------------------------------------------------------------------
int vtkEdgeLayout::RequestData(vtkInformation *vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
if (this->LayoutStrategy == NULL)
{
vtkErrorMacro(<< "Layout strategy must be non-null.");
return 0;
}
// get the info objects
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
// get the input and output
vtkGraph *input = vtkGraph::SafeDownCast(
inInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkGraph *output = vtkGraph::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
if (this->InternalGraph)
{
this->InternalGraph->Delete();
}
this->InternalGraph = input->NewInstance();
// The strategy object is going to modify the Points member so
// we'll replace that with a deep copy. For everything else a
// shallow copy is sufficient.
this->InternalGraph->ShallowCopy(input);
// Copy the edge layout points.
this->InternalGraph->DeepCopyEdgePoints(input);
// Give the layout strategy a pointer to the input. We set it to
// NULL first to force the layout algorithm to re-initialize
// itself. This is necessary in case the input is the same data
// object with a newer mtime.
this->LayoutStrategy->SetGraph(NULL);
this->LayoutStrategy->SetGraph(this->InternalGraph);
// No matter whether the input is new or not, the layout strategy
// needs to do its thing. It modifies its input
// (this->InternalGraph) so we can just use that as the output.
this->LayoutStrategy->Layout();
output->ShallowCopy(this->InternalGraph);
return 1;
}
// ----------------------------------------------------------------------
void vtkEdgeLayout::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "LayoutStrategy: "
<< (this->LayoutStrategy ? "" : "(none)") << endl;
if (this->LayoutStrategy)
{
this->LayoutStrategy->PrintSelf(os, indent.GetNextIndent());
}
os << indent << "InternalGraph: "
<< (this->InternalGraph ? "" : "(none)") << endl;
if (this->InternalGraph)
{
this->InternalGraph->PrintSelf(os, indent.GetNextIndent());
}
}
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