(define-gboxed-variant-cstruct event "GdkEvent"
  (type event-type)
  (window (g:object window))
  (send-event (:boolean :int8))
            ...
            ((:window-state) event-window-state
             (changed-mask window-state)
             (new-window-state window-state))
  ... ))  

type

The gdk:event-type type of the event.

window

The gdk:window object which received the event.

send-event

True if the event was sent explicitly.

changed-mask

The window-state mask specifying what flags have changed.

new-window-state

The new window state, a combination of gdk:window-state bits.