gtk:widget-visible (object)

object -- a gtk:widget object
setting -- a boolean whether widget is visible

The accessor for the visible slot gets or sets whether the widget is visible. Note that this does not take into account whether the parent of the widget is also visible or the widget is obscured in any way.

If you want to take into account whether the parent of the widget is also marked as visible, use the gtk:widget-is-visible function.