Method SelectRows

Views/Infovis/vtkParallelCoordinatesRepresentation.cxx:1683–1786

------------------------------------------------------------------------------ does the actual selection, including joining the new selection with the old selection of the same class with various set operations.

// does the actual selection, including joining the new selection with the
// old selection of the same class with various set operations.
void vtkParallelCoordinatesRepresentation::SelectRows(
  vtkIdType brushClass, vtkIdType brushOperator, vtkIdTypeArray* newSelectedIds)
{
  // keep making new selection nodes (and initializing them) until a node for
  // brushClass actually exists.
  vtkSelection* selection = this->GetAnnotationLink()->GetCurrentSelection();
  vtkSelectionNode* node = selection->GetNode(brushClass);
  while (!node)
  {
    vtkSmartPointer<vtkSelectionNode> newnode = vtkSmartPointer<vtkSelectionNode>::New();
    newnode->GetProperties()->Set(vtkSelectionNode::CONTENT_TYPE(), vtkSelectionNode::PEDIGREEIDS);
    newnode->GetProperties()->Set(vtkSelectionNode::FIELD_TYPE(), vtkSelectionNode::ROW);
    selection->AddNode(newnode);

    // initialize the selection data
    vtkSmartPointer<vtkIdTypeArray> selectedIds = vtkSmartPointer<vtkIdTypeArray>::New();
    newnode->SetSelectionList(selectedIds);

    // initialize everything for drawing the selection
    vtkSmartPointer<vtkPolyData> polyData = vtkSmartPointer<vtkPolyData>::New();
    vtkSmartPointer<vtkActor2D> actor = vtkSmartPointer<vtkActor2D>::New();
    vtkSmartPointer<vtkPolyDataMapper2D> mapper = vtkSmartPointer<vtkPolyDataMapper2D>::New();
    mapper.TakeReference(this->InitializePlotMapper(polyData, actor));

    this->I->SelectionData.push_back(polyData);
    this->I->SelectionMappers.push_back(mapper);
    this->I->SelectionActors.push_back(actor);

    this->AddPropOnNextRender(actor);

    node = selection->GetNode(brushClass);
  }

  vtkIdTypeArray* oldSelectedIds = vtkArrayDownCast<vtkIdTypeArray>(node->GetSelectionList());

  // no selection list yet? that shouldn't be possible...it was allocated above
  if (!oldSelectedIds)
  {
    return;
  }

  vtkSmartPointer<vtkIdTypeArray> outSelectedIds = vtkSmartPointer<vtkIdTypeArray>::New();

  int numOldIds = oldSelectedIds->GetNumberOfTuples();
  int numNewIds = newSelectedIds->GetNumberOfTuples();
  switch (brushOperator)
  {
    case vtkParallelCoordinatesView::VTK_BRUSHOPERATOR_ADD:
      // add all of the old ones, clobbering the class if it's in the new array
      for (int i = 0; i < numOldIds; i++)
      {
        outSelectedIds->InsertNextValue(oldSelectedIds->GetValue(i));
      }

      // add all of the new ones, as long as they aren't in the old array
      for (int i = 0; i < numNewIds; i++)
      {
        if (oldSelectedIds->LookupValue(newSelectedIds->GetValue(i)) == -1)