ruby-gnome2/ruby-gnome2 — pull request #236 by tescorg (2014-05-07 23:29:00+00:00)
Title: gtk3: add Gtk::Window#set_titlebar (enable the use of Gtk::HeaderBar)

Adds the #set_titlebar method to Gtk::Window.
Without this, having Gtk::HeaderBar seems useless because I cannot find a way to actually use it.

I compiled and tested this with gnome-shell 3.12 and had no issue.