you've marked TRConstraint as obsolete, however not all behavior has been yet implemented in new RTConstraint.

Namely methods from "public - resizing", "public - camera", and "public - aligning".

Secondly I am not sure about the name of RTConstraint class>>child:parent: (Tudor also didn't like the name when he saw it. :))

I don't think the naming fits well into Roassal... maybe RTConstraint class>>on:backElement: ?

Thanks,

Peter