Method RequestData

Filters/General/vtkAnnotationLink.cxx:169–232

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//------------------------------------------------------------------------------
int vtkAnnotationLink::RequestData(vtkInformation* vtkNotUsed(info),
  vtkInformationVector** inVector, vtkInformationVector* outVector)
{
  vtkInformation* inInfo = inVector[0]->GetInformationObject(0);
  vtkTable* inputMap = vtkTable::GetData(inVector[1]);
  vtkAnnotationLayers* input = nullptr;
  vtkSelection* inputSelection = nullptr;
  if (inInfo)
  {
    input = vtkAnnotationLayers::SafeDownCast(inInfo->Get(vtkDataObject::DATA_OBJECT()));
    inputSelection = vtkSelection::SafeDownCast(inInfo->Get(vtkDataObject::DATA_OBJECT()));
  }

  vtkInformation* outInfo = outVector->GetInformationObject(0);
  vtkAnnotationLayers* output =
    vtkAnnotationLayers::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));

  vtkInformation* mapInfo = outVector->GetInformationObject(1);
  vtkMultiBlockDataSet* maps =
    vtkMultiBlockDataSet::SafeDownCast(mapInfo->Get(vtkDataObject::DATA_OBJECT()));

  vtkInformation* selInfo = outVector->GetInformationObject(2);
  vtkSelection* sel = vtkSelection::SafeDownCast(selInfo->Get(vtkDataObject::DATA_OBJECT()));

  // Give preference to input annotations
  if (input)
  {
    this->ShallowCopyToOutput(input, output, sel);
  }
  else if (this->AnnotationLayers)
  {
    this->ShallowCopyToOutput(this->AnnotationLayers, output, sel);
  }

  // If there is an input selection, set it on the annotation layers
  if (inputSelection)
  {
    sel->ShallowCopy(inputSelection);
    output->SetCurrentSelection(sel);
  }

  // If there are input domain maps, give preference to them
  if (inputMap)
  {
    vtkSmartPointer<vtkTable> outMap = vtkSmartPointer<vtkTable>::New();
    outMap->ShallowCopy(inputMap);
    maps->SetBlock(0, outMap);
  }
  else
  {
    unsigned int numMaps = static_cast<unsigned int>(this->DomainMaps->GetNumberOfItems());
    maps->SetNumberOfBlocks(numMaps);
    for (unsigned int i = 0; i < numMaps; ++i)
    {
      vtkSmartPointer<vtkTable> map = vtkSmartPointer<vtkTable>::New();
      map->ShallowCopy(this->DomainMaps->GetItem(i));
      maps->SetBlock(i, map);
    }