(define-gboxed-variant-cstruct event "GdkEvent"
  (type event-type)
  (window (g:object window))
  (send-event (:boolean :int8))
  (:variant type
            ...
            ;; GdkEventPadGroupMode
            ((:pad-group-mode) event-pad-group-mode
             (time :uint32)
             (group :uint)
             (mode :uint))
  ... ))  

type

The gdk:event-type of the event, the value :pad-group-mode.

window

The gdk:window object which received the event.

send-event

True if the event was sent explicitly.

time

The time of the event in milliseconds.

group

The pad group that is switching mode. A :tablet-pad device may have one or more groups containing a set of buttons/rings/strips each.

mode

The new mode of group. Different groups in a :tablet-pad device may have different current modes.