As part of the gnome-keyring prompting work I tried to implement a simple checkbox using StButton. However it doesn't seem to be capable enough, both in design, and implementation:

From Florian Müllner:
> 'check-box' (single quotes!) is very generic (which is fine by me), but the
> corresponding CSS is not - I wonder if it would be clearer to use a composite
> widget here (for instance a BoxLayout with a Bin (for the check-box image) and
> a Label) and set it as the Button child. In addition to the artwork, the
> ellipsized label also feels wrong (in my testing, I get "Automatically unlock
> this keyring whenever ...", which means the most important part is missing). I
> suspect this is way easier to fix with a custom Button child than with crazy
> CSS.

I agree that it needs to be done better. I tried to do it similar to what
you're suggesting but ran out of time somewhere between undocumented St toolkit,
unfamiliar (or strange) clutter behavior, and CSS selectors that didn't work as
expected. In addition a new widget would need to support keyboard, active,
focus, hover and other things I'm sure. StButton has all those already, so that was the reason behind restyling it.

The ellipsizing behavior of StButton is quite brittle, and should probably be
tweaked or removed. I can imagine it running into problems with translated
labels as well.

In addition the checkbox needs to have its look designed properly.

So here's a new bug for properly designing a checkbox control.