Add a button view+widget with up to 9 labels

[eugenesvk]

Allowing the creation of helpful UI buttons like this, documenting which keys activate it

It supports label padding as well, so you could in principle position labels wherever you like

I've noticed that even empty labels have >0 size (4) and, I guess, makes the button slightly bigger than necessary. Is this an effect of some global layout constant?

• Is it possible to disable it for all labels but the middle one?

My idea is for this to be identical in its default instance to a regular button.

I've also thought about skipping empty children (though currently it's suprisingy cumbersome to test whether a label is empty, so thought of adding some is method to the label to check whether its string is empty), but then wasn't clear on the proper mechanism for instantiating such children once their text is changed, so thought it might not be an issue if empty labels always exist.

• Or is it an issue that empty labels are always created/tracked?

Updated docs/tests and added a gallery type example similar to #864

[PoignardAzur]

This feels like the kind of case where we might want a "widget nursery" kind of crate, like druid had. It wouldn't need to be a separate repository, though, I don't think that separation was really useful.

[eugenesvk]

What do you think of just making the default widgets overpowered and add all the extra functionality like this to them?

[PoignardAzur]

I'm a bit iffy on that. The complexity quickly adds up.