val toggle_win:
?check:GMenu.check_menu_item -> GWindow.window -> unit -> unit
-val add_key_binding: Gdk.keysym -> (unit -> 'a) -> GBin.event_box -> unit
-
(** Connect a callback to the clicked signal of a button, ignoring its return
* value *)
val connect_button: #GButton.button -> (unit -> unit) -> unit