module S:sig..end
val activate : ([> `button ], unit -> unit) GtkSignal.tval clicked : ([> `button ], unit -> unit) GtkSignal.tval enter : ([> `button ], unit -> unit) GtkSignal.tval leave : ([> `button ], unit -> unit) GtkSignal.tval pressed : ([> `button ], unit -> unit) GtkSignal.tval released : ([> `button ], unit -> unit) GtkSignal.t