Created attachment 5849 screenshot showing the list of fonts I mean the list of fonts itself.
Good catch, it should indeed show some preview text (which it currently doesn't). I'm not entirely sure what's up with that, either Gtk3 doesn't set a default preview text and we have to explicitely set it with gtk_font_chooser_set_preview_text or it's a bug in Gtk.
(In reply to Simon Steinbeiss from comment #1) > Good catch, it should indeed show some preview text (which it currently > doesn't). I'm not entirely sure what's up with that, either Gtk3 doesn't set > a default preview text and we have to explicitely set it with > gtk_font_chooser_set_preview_text or it's a bug in Gtk. I'm trying hard to remember where I saw that same font chooser with previews working. Parole is minimal and great. It's just what I was looking for. Thanks for listening (reading).
Created attachment 5884 Set the default subtitle font preview text I have attached a trivial patch that fixes the issue. However, I'm not sure as to whether it is really a good choice to merge it, as it 1) introduces a new string for translators and 2) just covers up the fact that for some reason the default preview-text is empty. (Note: The default preview-text is not supposed to be empty: https://developer.gnome.org/gtk3/stable/GtkFontChooser.html#GtkFontChooser--preview-text)
Ok, found the culprit and the proper fix. (I suppose glade automatically added that property to our .ui file so it set the preview-text to "".) Fixed in commit 5b1261537cce4579c17bf2959515eb989f7c550f.