Method ComputeLabelWidth

Views/Infovis/vtkDendrogramItem.cxx:1376–1406

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//------------------------------------------------------------------------------
void vtkDendrogramItem::ComputeLabelWidth(vtkContext2D* painter)
{
  this->LabelWidth = 0.0;
  if (!this->DrawLabels)
  {
    return;
  }
  int fontSize = painter->ComputeFontSizeForBoundedString("Igq", VTK_FLOAT_MAX, this->LeafSpacing);
  if (fontSize < 8)
  {
    return;
  }

  // temporarily set text to default orientation
  double orientation = painter->GetTextProp()->GetOrientation();
  painter->GetTextProp()->SetOrientation(0.0);

  // get array of node names from the tree
  vtkStringArray* vertexNames = vtkArrayDownCast<vtkStringArray>(
    this->LayoutTree->GetVertexData()->GetAbstractArray(this->VertexNameArrayName.c_str()));

  float bounds[4];
  for (vtkIdType i = 0; i < vertexNames->GetNumberOfTuples(); ++i)
  {
    painter->ComputeStringBounds(vertexNames->GetValue(i), bounds);
    this->LabelWidth = std::max(bounds[2], this->LabelWidth);
  }

  // restore orientation
  painter->GetTextProp()->SetOrientation(orientation);
}

//------------------------------------------------------------------------------
bool vtkDendrogramItem::GetPositionOfVertex(const std::string& vertexName, double position[2])