void gtk_cell_area_context_get_preferred_width ( GtkCellAreaContext* context, gint* minimum_width, gint* natural_width )
Gets the accumulative preferred width for all rows which have been requested with this context.
gtk_cell_area_context_reset() is called and/or before ever
requesting the size of a
GtkCellArea, the returned values are 0.
Available since: 3.0