X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fui%2Fgui%2Fsort-cases-dialog.c;h=62fac58379b7aaf71f0de9fed8672c98ee3ed74a;hb=f606d3c31ea117f7b9cb187f3521c7051a8db2ba;hp=a722063bca70beb42f7ca4a4a990926fa369b4b1;hpb=0bd0098aec2ee31d9460c8d4c1263d0b5ccc4324;p=pspp

diff --git a/src/ui/gui/sort-cases-dialog.c b/src/ui/gui/sort-cases-dialog.c
index a722063bca..62fac58379 100644
--- a/src/ui/gui/sort-cases-dialog.c
+++ b/src/ui/gui/sort-cases-dialog.c
@@ -45,6 +45,21 @@ struct sort_cases_dialog
   GtkToggleButton *ascending;
 };
 
+
+static gboolean
+dialog_state_valid (gpointer data)
+{
+  struct sort_cases_dialog *scd = data;
+  GtkTreeModel *model = gtk_tree_view_get_model (scd->tv);
+
+  gint n_rows = gtk_tree_model_iter_n_children  (model, NULL);
+
+  if ( n_rows == 0 )
+    return FALSE;
+
+  return TRUE;
+}
+
 static char *
 generate_syntax (const struct sort_cases_dialog *scd)
 {
@@ -117,6 +132,11 @@ sort_cases_dialog (GObject *o, gpointer data)
   scd.ascending =
     GTK_TOGGLE_BUTTON (get_widget_assert (xml, "sort-cases-radiobutton0"));
 
+
+  psppire_dialog_set_valid_predicate (PSPPIRE_DIALOG (dialog),
+				      dialog_state_valid, &scd);
+
+
   response = psppire_dialog_run (PSPPIRE_DIALOG (dialog));