+ psppire_selector_set_default_selection_func (GTK_TYPE_ENTRY, insert_source_row_into_entry);
+ psppire_selector_set_default_selection_func (PSPPIRE_VAR_VIEW_TYPE, insert_source_row_into_tree_view);
+ psppire_selector_set_default_selection_func (GTK_TYPE_TREE_VIEW, insert_source_row_into_tree_view);
+