[vtkusers] Pbm legend axis

[Muriel Delaveau]

I don't know how to put a vertical legend to an y axis when I only plot 
in 2 dimensions. I try somez ways but it doesn't work

 HistoActor->GetPositionCoordinate()->SetValue(0.025, 0.025, 0.);
  HistoActor->GetPosition2Coordinate()->SetValue(0.975, 0.975, 0.);
  vtkAxisActor2D * Axey = HistoActor->GetYAxisActor2D();
  vtkTextProperty* tprop = HistoActor->GetTitleTextProperty();
   tprop->SetOrientation(90.0);
   tprop->SetColor(0., 0., 0.);
   Axey->SetTitleTextProperty(tprop);

M. Delaveau