Ruby Font Selector?

[pc0158]

I'd like to have a font selector in my Ruby plugin that would allow the user to select a font from a drop-down list. I've looked around and can't find anything that offers such capability up front, nor can I find any way to retrieve a list of installed font names to build one with. Of course, any such widget would ideally behave like the font selectors in other applications like Sketchup, with each font name displayed in its own particular font.

Any guidance on accomplishing this?