Set child as the current focus child of widget.
This function is only suitable for widget implementations. If you want a certain widget to get the input focus, call gtk.widget.Widget.grabFocus on it.
a direct child widget of widget or null to unset the focus child of widget
Set child as the current focus child of widget.
This function is only suitable for widget implementations. If you want a certain widget to get the input focus, call gtk.widget.Widget.grabFocus on it.