setFocus
Sets the focus widget for @self.
If @focus is not the current focus widget, and is focusable, sets it as the focus widget for the dialog.
If focus is NULL, unsets the focus widget for this dialog. To set the focus to a particular widget in the dialog, it is usually more convenient to use method@Gtk.Widget.grab_focus instead of this function.
Since
1.5
Parameters
focus
the focus widget