gdk:event-type (instance)

instance -- a gdk:event instance
type -- a value of the gdk:event-type enumeration

The accessor for the type slot of the gdk:event structure gets or sets the type of the event as a value of the gdk:event-type enumeration. Check for a button press event in a handler for the "event" signal on a drawing area.

(defun drawing-area-event (widget event)
  (declare (ignore widget))
  ;; Check for a button press event on the drawing area
  (when (eq (gdk:event-type event) :button-press)
    ... ))