gtk:window-default-widget (object)

object -- a gtk:window widget
widget -- a gtk:widget object to be the default widget, or nil to unset the default widget for the toplevel

Accessor of the default-widget slot of the gtk:window class. The gtk:window-default-widget function returns the default widget for the window. The (setf gtk:window-default-widget) function sets or unsets the default widget. The default widget is the widget that is activated when the user presses the Enter key in a dialog for example.