Sorry to bring bad news, project is great but using gtk3 means it cannot load plugin UIs that use gtk2 (which are basically all existent lv2 gtk uis at the moment).
Mixing gtk3 and gtk2 on the same process just doesnt work.
Out of process UI bridging is a potential option, but this is not supported by suil. afaik only carla tries to do such tricks.
Oh no. That explains why the gtk UIs don't appear. Thanks for the info man. Well I'll have native plugin support which is not related to lv2, which may be the only thing for some time.
Sorry to bring bad news, project is great but using gtk3 means it cannot load plugin UIs that use gtk2 (which are basically all existent lv2 gtk uis at the moment). Mixing gtk3 and gtk2 on the same process just doesnt work. Out of process UI bridging is a potential option, but this is not supported by suil. afaik only carla tries to do such tricks.