Builder::Gtk

require 'gtkbuilder'

Gtk.init
window = Builder::Gtk.new do |w|
  w.vbox(true, 0) do |v|
	v.start(true, true, 1) do
	  v.text_view do |t|
        t.set_size_request(200, 200)
      end
	  v.entry
	end
  end
end
window.show_all
Gtk.main