gdk:display-manager-default-display (object)

object -- a gdk:display-manager object
display -- a default gdk:display object

Accessor of the default-display slot of the gdk:display-manager class. The gdk:display-manager-default-display function gets the default gdk:display object, or nil if there is no default display. The (setf gdk:display-manager-default-display) function sets display as the default display.

(gdk:display-manager-default-display (gdk:display-manager-get))
=> #<GDK:DISPLAY {1001F9A233}>