Frama-C API - Widget
 Simple Widgets
class type widget = object ... endclass type action = object ... endclass type 'a signal = object ... endclass type 'a selector = object ... endLabels
Default: ~style:`Label ~align:`Left
Icons
val gimage : icon -> GMisc.imageButtons
class checkbox : label:string -> ?tooltip:string -> unit -> object ... endclass switch : ?tooltip:string -> unit -> object ... endGroups
class 'a group : 'a -> object ... endA group is not a widget ; it creates interconnected toggle or radio buttons, each switching to a peculiar value.
Selectors
class spinner : ?min:int -> ?max:int -> ?step:int -> value:int -> ?tooltip:string ->  unit -> object ... endclass popup : unit -> object ... endContextual menu. The #popup method can be called inside a right-click callback. For instance: widget#on_right_click menu#popup.
