Horizontal color bar with vertical tick labels

Thanks for this reference. Would you mind pointing me to the equivalent source file for the primary axis painters? It would help me resolve the other issue I posted: Remove Axis Tick Labels :

I see that the vtkAxis class supports independent booleans LabelsVisible and TicksVisible, although in vtkContext2DScalarBarActor.cxx the two are toggled together. This means that there is not a way to independently toggle the visibility of the tick marks and the numerical labels, which is precisely what I am trying to do in the other issue. I just need to locate the source for the primary axis configuration to implement this change.

Thanks!