# Class virtual OgtkBinProps.viewport_notify

    class virtual viewport_notify : [> `viewport ] Gobject.obj -> object .. end

    val obj : ([> `viewport ] as 'a) Gobject.obj

    method private notify : 'b. ('a, 'b) Gobject.property -> callback:('b -> unit) -> GtkSignal.id

    method hadjustment : callback:(GData.adjustment -> unit) -> GtkSignal.id

    method vadjustment : callback:(GData.adjustment -> unit) -> GtkSignal.id

    method shadow_type : callback:(GtkEnums.shadow_type -> unit) -> GtkSignal.id