void gtk_popover_set_relative_to ( GtkPopover* popover, GtkWidget* relative_to )
Sets a new widget to be attached to
visible, the position will be updated.
Note: the ownership of popovers is always given to their
widget, so if
relative_to is set to
NULL on an attached
will be detached from its previous widget, and consequently destroyed
unless extra references are kept.
The argument can be
The data is owned by the caller of the function.