For the visibility question, I was trying to do a ...

# doodle

[Alessandro Marcolini]

For the visibility question, I was trying to do a workaround for a GridPanel by setting a sizing policy to return something like

mapOf(0 to if (view.visible) view.height else 0.0)

and I wasn't seeing any changes, but I think GridPanel sets the bounds of views, so view.height would have been zero anyways.

[Alessandro Marcolini]

Yeah changing view.height to something else (like view.minimumSize.height ) fixed it.