gtk:widget-focus-child (widget)

widget -- a gtk:widget object
child -- a gtk:widget object for a direct child widget, or nil to unset the focus child of widget

The gtk:widget-focus-child function returns the current focus child of widget. The (setf gtk:widget-focus-child) function sets child as the current focus child of widget. The previous focus child will be unset.

This function is only suitable for widget implementations. If you want a certain widget to get the input focus, call the gtk:widget-grab-focus function on it.