By default you can't. I've seen someone on the list implemented a
successful proof of concept doing nearly the same thing you want by
deriving a class from Prima::Edit. Icons on the left at least; I can't
find neither who did it nor the files though, sorry.
If you want to do that yourself, you'll need to add a couple of
properties that'll contain information about icons and fg/bg colors, and
overload on_paint to display it. Prima::Edit has a limited fg
facilities, but it's more for syntax highlighting.
You're welcome to write me to dmitry@karasik.eu.org if you need further
info about this.
/dk
RT for rt.cpan.org