Method BuildInverseSelection

Views/Infovis/vtkParallelCoordinatesRepresentation.cxx:1790–1842

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
//
void vtkParallelCoordinatesRepresentation::BuildInverseSelection()
{
  vtkSelection* selection = this->GetAnnotationLink()->GetCurrentSelection();

  this->InverseSelection->RemoveAllNodes();

  int numNodes = selection->GetNumberOfNodes();
  if (numNodes <= 0)
  {
    return;
  }

  vtkSmartPointer<vtkIdTypeArray> unselected = vtkSmartPointer<vtkIdTypeArray>::New();
  std::vector<int> idxs(numNodes, 0);

  for (int i = 0; i < this->NumberOfSamples; i++)
  {
    bool found = false;
    for (int j = 0; j < numNodes; j++)
    {

      vtkIdTypeArray* a =
        vtkArrayDownCast<vtkIdTypeArray>(selection->GetNode(j)->GetSelectionList());
      if (!a || idxs[j] >= a->GetNumberOfTuples())
      {
        continue;
      }

      int numRows = a->GetNumberOfTuples();
      while (idxs[j] < numRows && a->GetValue(idxs[j]) < i)
      {
        idxs[j]++;
      }

      if (idxs[j] < numRows && a->GetValue(idxs[j]) == i)
      {
        found = true;
        break;
      }
    }

    if (!found)
    {
      unselected->InsertNextValue(i);
    }
  }

  vtkSmartPointer<vtkSelectionNode> totalSelection = vtkSmartPointer<vtkSelectionNode>::New();
  totalSelection->SetSelectionList(unselected);

  if (unselected->GetNumberOfTuples())
    this->InverseSelection->AddNode(totalSelection);
}

//------------------------------------------------------------------------------
// get the value range of an axis