Method UpdateCache

Charts/Core/vtkPlotBox.cxx:274–321

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

}
//------------------------------------------------------------------------------
bool vtkPlotBox::UpdateCache()
{
  if (!this->Superclass::UpdateCache())
  {
    return false;
  }

  // Each boxplot is a column in our storage array,
  // they are scaled from 0.0 to 1.0
  vtkChartBox* parent = vtkChartBox::SafeDownCast(this->Parent);
  vtkTable* table = this->Data->GetInput();
  if (!parent || !table || table->GetNumberOfColumns() == 0)
  {
    return false;
  }

  vtkStringArray* cols = parent->GetVisibleColumns();

  this->Storage->resize(cols->GetNumberOfTuples());
  vtkIdType rows = table->GetNumberOfRows();

  for (vtkIdType i = 0; i < cols->GetNumberOfTuples(); ++i)
  {
    std::vector<double>& col = this->Storage->at(i);
    col.resize(rows);
    vtkSmartPointer<vtkDataArray> data =
      vtkArrayDownCast<vtkDataArray>(table->GetColumnByName(cols->GetValue(i).c_str()));
    if (!data)
    {
      continue;
    }

    vtkAxis* axis = parent->GetYAxis();
    // Also need the range from the appropriate axis, to normalize points
    double min = axis->GetUnscaledMinimum();
    double max = axis->GetUnscaledMaximum();
    double scale = 1.0f / (max - min);

    for (vtkIdType j = 0; j < rows; ++j)
    {
      col[j] = (data->GetTuple1(j) - min) * scale;
    }
    std::sort(col.begin(), col.end());
  }

  this->BuildTime.Modified();
  return true;
}

//------------------------------------------------------------------------------
void vtkPlotBox::SetLookupTable(vtkScalarsToColors* lut)