Just want to mention that:
I downloaded glade 3.38.1 as source code from glade.gnome.org and built it with meson and ninja, as instructed, on Ubuntu 20.04 Desktop. (Had to install a lot of packages to make it build, though).
When I run glade from bash cmd-line I get the message you are discussing:
(glade:20715): Gdk-WARNING **: 15:27:23.596: ../../../../../gdk/x11/gdkwindow-x11.c:5633 drawable is not a native X11 window
glade window opens up OK, and I can load my .glade-file, so it's maybe not a big issue.
Just want to mention that: ./../.. /gdk/x11/ gdkwindow- x11.c:5633 drawable is not a native X11 window
I downloaded glade 3.38.1 as source code from glade.gnome.org and built it with meson and ninja, as instructed, on Ubuntu 20.04 Desktop. (Had to install a lot of packages to make it build, though).
When I run glade from bash cmd-line I get the message you are discussing:
(glade:20715): Gdk-WARNING **: 15:27:23.596: ../../.
glade window opens up OK, and I can load my .glade-file, so it's maybe not a big issue.