Hi list, I share this asbtraction made for gemQ project. It is an abstraction let you have a preview window of the main Gem Window content. It's work only in linux (but with a little effort it's supposed to work on Mac also) here more infos and download: https://code.autistici.org/trac/planetQ/wiki/preQiew
I hope it can be helpfull for someone out there!
cheers husk