+gchar *
+psppire_data_store_value_to_string_with_labels (gpointer unused, PsppireDataStore *store, gint col, gint row, const GValue *v)
+{
+ const struct variable *variable = psppire_dict_get_variable (store->dict, col);
+ g_return_val_if_fail (variable, g_strdup ("???"));
+
+ GVariant *vrnt = g_value_get_variant (v);
+ union value val;
+ value_variant_get (&val, vrnt);
+
+ char *out = NULL;
+
+ const struct val_labs *vls = var_get_value_labels (variable);
+ struct val_lab *vl = val_labs_lookup (vls, &val);
+ if (vl != NULL)
+ out = strdup (val_lab_get_label (vl));
+ else
+ out = unlabeled_value (store, variable, &val);
+
+ value_destroy_from_variant (&val, vrnt);
+
+ return out;
+}
+
+static void
+__get_value (GtkTreeModel *tree_model,
+ GtkTreeIter *iter,
+ gint column,
+ GValue *value)
+{
+ PsppireDataStore *store = PSPPIRE_DATA_STORE (tree_model);
+
+ g_return_if_fail (iter->stamp == store->stamp);
+
+ const struct variable *variable = psppire_dict_get_variable (store->dict, column);
+ if (NULL == variable)
+ return;
+
+ gint row = GPOINTER_TO_INT (iter->user_data);
+
+ struct ccase *cc = datasheet_get_row (store->datasheet, row);
+
+ g_return_if_fail (cc);
+
+ g_value_init (value, G_TYPE_VARIANT);
+
+ const union value *val = case_data_idx (cc, var_get_case_index (variable));
+
+ GVariant *vv = value_variant_new (val, var_get_width (variable));
+
+ g_value_set_variant (value, vv);
+
+ case_unref (cc);
+}
+
+
+static void
+__tree_model_init (GtkTreeModelIface *iface)
+{
+ iface->get_flags = __tree_model_get_flags;
+ iface->get_n_columns = __tree_model_get_n_columns ;
+ iface->get_column_type = NULL;
+ iface->get_iter = NULL;
+ iface->iter_next = NULL;
+ iface->get_path = NULL;
+ iface->get_value = __get_value;
+
+ iface->iter_children = NULL;
+ iface->iter_has_child = NULL;
+ iface->iter_n_children = __tree_model_iter_n_children;
+ iface->iter_nth_child = __iter_nth_child;
+ iface->iter_parent = NULL;
+}
+
+G_DEFINE_TYPE_WITH_CODE (PsppireDataStore, psppire_data_store, G_TYPE_OBJECT,
+ G_IMPLEMENT_INTERFACE (GTK_TYPE_TREE_MODEL,
+ __tree_model_init))