Xpra: Ticket #1977: GTK4

Assuming that we don't jump ship by then (#1995, the python3 / gtk3 transition is hard enough: #1568), we'll need to handle Migrating from GTK+ 3.x to GTK+ 4, in particular:

Native and foreign subwindows are no longer supported. These concepts were complicating the code and could not be supported across backends. gdk_window_reparent() is no longer available.

Tue, 23 Oct 2018 05:22:44 GMT - Antoine Martin: status, description changed

Wed, 20 Mar 2019 05:06:15 GMT - Antoine Martin: milestone changed

Milestone renamed

Sat, 21 Sep 2019 12:23:21 GMT - Antoine Martin: milestone changed

Sat, 23 Jan 2021 05:38:51 GMT - migration script:

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/1977