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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkMultiGroupDataIterator.cxx,v $
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.
=========================================================================*/
#include "vtkMultiGroupDataIterator.h"
#include "vtkInformation.h"
#include "vtkMultiGroupDataInformation.h"
#include "vtkMultiGroupDataSet.h"
#include "vtkMultiGroupDataSetInternal.h"
#include "vtkObjectFactory.h"
vtkCxxRevisionMacro(vtkMultiGroupDataIterator, "$Revision: 1.3 $");
vtkStandardNewMacro(vtkMultiGroupDataIterator);
class vtkMultiGroupDataIteratorInternal
{
public:
// We store two iterators.
// DSIterator (DataSets) iterators over the groups
// LDSIteator (GroupDataSets) iterates over the nodes in the current group
vtkMultiGroupDataSetInternal::GroupDataSetsIterator LDSIterator;
vtkMultiGroupDataSetInternal::DataSetsIterator DSIterator;
vtkSmartPointer<vtkCompositeDataIterator> SubIterator;
};
//----------------------------------------------------------------------------
vtkMultiGroupDataIterator::vtkMultiGroupDataIterator()
{
this->DataSet = 0;
this->Internal = new vtkMultiGroupDataIteratorInternal;
}
//----------------------------------------------------------------------------
vtkMultiGroupDataIterator::~vtkMultiGroupDataIterator()
{
this->SetDataSet(0);
delete this->Internal;
}
//----------------------------------------------------------------------------
void vtkMultiGroupDataIterator::SetDataSet(vtkMultiGroupDataSet* dataset)
{
if (this->DataSet != dataset)
{
if (this->DataSet)
{
this->DataSet->UnRegister(this);
}
this->DataSet = dataset;
if (this->DataSet)
{
this->DataSet->Register(this);
this->GoToFirstItem();
}
this->Modified();
}
}
//----------------------------------------------------------------------------
void vtkMultiGroupDataIterator::GoToFirstItem()
{
if (!this->DataSet)
{
vtkErrorMacro("No data object has been set.");
return;
}
// Initialize to the first group
this->Internal->DSIterator = this->DataSet->Internal->DataSets.begin();
if ( !this->DataSet->Internal->DataSets.empty() )
{
// Initialize to the first node in the first group
this->Internal->LDSIterator = this->Internal->DSIterator->begin();
if (this->Internal->LDSIterator == this->Internal->DSIterator->end())
{
this->GoToNextNonEmptyGroup();
}
// Skip nodes with NULL dataset pointers.
if (!this->IsDoneWithTraversal())
{
vtkDataObject* cur = this->GetCurrentDataObject();
if (!cur)
{
this->GoToNextItem();
}
else if (this->VisitOnlyLeaves && cur->IsA("vtkCompositeDataSet"))
{
this->Internal->SubIterator.TakeReference(
static_cast<vtkCompositeDataSet*>(cur)->NewIterator());
this->Internal->SubIterator->GoToFirstItem();
if (this->Internal->SubIterator->IsDoneWithTraversal())
{
this->Internal->SubIterator = 0;
this->GoToNextItem();
}
}
}
}
}
//----------------------------------------------------------------------------
void vtkMultiGroupDataIterator::GoToNextNonEmptyGroup()
{
if (!this->IsDoneWithTraversal())
{
while (1)
{
this->Internal->DSIterator++;
if (this->IsDoneWithTraversal())
{
break;
}
this->Internal->LDSIterator = this->Internal->DSIterator->begin();
if (this->Internal->LDSIterator != this->Internal->DSIterator->end())
{
break;
}
}
}
}
//----------------------------------------------------------------------------
void vtkMultiGroupDataIterator::GoToNextItem()
{
if (!this->DataSet)
{
vtkErrorMacro("No data object has been set.");
return;
}
if (!this->IsDoneWithTraversal())
{
// In case the first group is empty
if (this->Internal->LDSIterator == this->Internal->DSIterator->end())
{
this->GoToNextNonEmptyGroup();
if (this->IsDoneWithTraversal())
{
return;
}
}
if (this->Internal->SubIterator)
{
this->Internal->SubIterator->GoToNextItem();
if (!this->Internal->SubIterator->IsDoneWithTraversal())
{
return;
}
this->Internal->SubIterator = 0;
}
this->Internal->LDSIterator++;
if (this->Internal->LDSIterator == this->Internal->DSIterator->end())
{
this->GoToNextNonEmptyGroup();
if (this->IsDoneWithTraversal())
{
return;
}
}
// Skip nodes with NULL dataset pointers. If current dataset is
// composite and VisitOnlyLeaves is on, go into the sub-dataset.
vtkDataObject* cur = this->GetCurrentDataObject();
if (!this->GetCurrentDataObject())
{
this->GoToNextItem();
}
else if (this->VisitOnlyLeaves && cur->IsA("vtkCompositeDataSet"))
{
this->Internal->SubIterator.TakeReference(
static_cast<vtkCompositeDataSet*>(cur)->NewIterator());
this->Internal->SubIterator->GoToFirstItem();
if (this->Internal->SubIterator->IsDoneWithTraversal())
{
this->Internal->SubIterator = 0;
this->GoToNextItem();
}
}
}
}
//----------------------------------------------------------------------------
int vtkMultiGroupDataIterator::IsDoneWithTraversal()
{
if (!this->DataSet)
{
vtkErrorMacro("No data object has been set.");
return 1;
}
if ( this->DataSet->Internal->DataSets.empty() ||
this->Internal->DSIterator == this->DataSet->Internal->DataSets.end() )
{
return 1;
}
return 0;
}
//----------------------------------------------------------------------------
vtkInformation* vtkMultiGroupDataIterator::GetCurrentInformationObject()
{
if ( !this->DataSet || this->DataSet->Internal->DataSets.empty() )
{
return 0;
}
if (this->Internal->SubIterator)
{
return this->Internal->SubIterator->GetCurrentInformationObject();
}
unsigned int group =
this->Internal->DSIterator - this->DataSet->Internal->DataSets.begin();
unsigned int idx =
this->Internal->LDSIterator - this->Internal->DSIterator->begin();
vtkMultiGroupDataInformation* mgInfo =
this->DataSet->GetMultiGroupDataInformation();
if (!mgInfo)
{
return 0;
}
return mgInfo->GetInformation(group, idx);
}
//----------------------------------------------------------------------------
vtkDataObject* vtkMultiGroupDataIterator::GetCurrentDataObject()
{
if ( !this->DataSet || this->DataSet->Internal->DataSets.empty() )
{
return 0;
}
if (this->Internal->SubIterator)
{
return this->Internal->SubIterator->GetCurrentDataObject();
}
return this->Internal->LDSIterator->GetPointer();
}
//----------------------------------------------------------------------------
void vtkMultiGroupDataIterator::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "DataSet: ";
if (this->DataSet)
{
os << endl;
this->DataSet->PrintSelf(os, indent.GetNextIndent());
}
else
{
os << "(none)" << endl;
}
}
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