gtk:widget-vexpand (object)

object -- a gtk:widget object
setting -- a boolean whether to expand vertically

Accessor of the vexpand slot of the gtk:widget class. The gtk:widget-vexpand function gets whether the widget would like any available extra vertical space. The (setf gtk:widget-vexpand) function sets whether the widget would like any available extra vertical space.

See the gtk:widget-hexpand function for more details.