Method Zoom

Views/Infovis/vtkParallelCoordinatesView.cxx:833–872

}

void vtkParallelCoordinatesView::Zoom(unsigned long eventId)
{
  vtkParallelCoordinatesInteractorStyle* style =
    vtkParallelCoordinatesInteractorStyle::SafeDownCast(this->GetInteractorStyle());
  vtkParallelCoordinatesRepresentation* rep =
    vtkParallelCoordinatesRepresentation::SafeDownCast(this->GetRepresentation());

  double p1[2], size[2], p2[2];
  rep->GetPositionAndSize(p1, size);
  p2[0] = p1[0] + size[0];
  p2[1] = p1[1] + size[1];

  double cursorPosition[2], cursorLastPosition[2], cursorStartPosition[2];
  style->GetCursorCurrentPosition(this->GetRenderer(), cursorPosition);
  style->GetCursorLastPosition(this->GetRenderer(), cursorLastPosition);
  style->GetCursorStartPosition(this->GetRenderer(), cursorStartPosition);

  double v1[2] = { cursorStartPosition[0] - p1[0], cursorStartPosition[1] - p1[1] };
  double v2[2] = { cursorStartPosition[0] - p2[0], cursorStartPosition[1] - p2[1] };

  double dy = -(cursorPosition[1] - cursorLastPosition[1]);

  if (eventId == vtkCommand::StartInteractionEvent)
  {
  }
  else if (eventId == vtkCommand::InteractionEvent)
  {
    double p1new[2] = { p1[0] + dy * v1[0], p1[1] + dy * v1[1] };
    double p2new[2] = { p2[0] + dy * v2[0], // - p1new[0],
      p2[1] + dy * v2[1] };                 // - p1new[1]};

    double sizenew[] = { p2new[0] - p1new[0], p2new[1] - p1new[1] };

    rep->SetPositionAndSize(p1new, sizenew);
    this->SetAxisHighlightPosition(rep, this->SelectedAxisPosition);
  }
  else if (eventId == vtkCommand::EndInteractionEvent)
  {
  }
}

void vtkParallelCoordinatesView::Pan(unsigned long eventId)
{