Taking a step back, the problems I have with the existing appearances (compact, compact-n, horizontal and horizontal-compact) are:
- we're missing a way to represent n columns WITH radio buttons/checkboxes
- it's not clear what the relationship between
compactandhorizontal-compactis. One doesn't have radio buttons/checkboxes and the other does. That should be clear from the naming - it's unclear what
horizontaldoes and what its relationship to the others is.
Given how confused I am trying to explain the suggestion and how the proposed appearances do and don't combine, I don't think we've addressed the second two points.
I have a strong preference to only introduce a modifier if it is used consistently. That is, in the proposal above, compact is a modifier but only in one case AND it can also act alone.
The proposal I've seen so far that most meets my criteria is as described here by @Tino_Kreutzer :
compact
compact-n
compact-auto
with modifier show-buttons or markers that can apply to any of them.
It's really easy to understand, there are no compatibility issues and it adds the missing combination.