From 39513fa7ed1c400cc33dfc2c382c24c778a11274 Mon Sep 17 00:00:00 2001
From: John Darrington <john@darrington.wattle.id.au>
Date: Fri, 19 May 2017 07:36:00 +0200
Subject: [PATCH] Add a callback when variables change

---
 src/ui/gui/psppire-import-assistant.c | 31 +++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/src/ui/gui/psppire-import-assistant.c b/src/ui/gui/psppire-import-assistant.c
index 6650b5d9cf..b97e06f55c 100644
--- a/src/ui/gui/psppire-import-assistant.c
+++ b/src/ui/gui/psppire-import-assistant.c
@@ -1856,6 +1856,35 @@ my_advance (struct casereader *reader, void *aux, casenumber cnt)
 }
 
 
+static void
+foo (struct dictionary *dict, void *aux)
+{
+  PsppireImportAssistant *ia = PSPPIRE_IMPORT_ASSISTANT (aux);
+  g_print ("%s:%d\n", __FILE__, __LINE__);
+
+  struct caseproto *proto = caseproto_create ();
+
+  int i;
+  for (i = 0 ; i < dict_get_var_cnt (ia->dict); ++i)
+    {
+      const struct variable *var = dict_get_var (ia->dict, i);
+      proto = caseproto_add_width (proto, var_get_width (var));
+    }
+
+
+  gint n_rows = gtk_tree_model_iter_n_children (ia->delimiters_model, NULL);
+
+  struct casereader *reader =
+    casereader_create_random (proto, n_rows, &my_casereader_class,  ia);
+
+
+  PsppireDataStore *store = NULL;
+    
+  g_object_get (ia->data_sheet, "data-model", &store, NULL);
+  
+  psppire_data_store_set_reader (store, reader);
+}
+
 /* Called just before the formats page of the assistant is
    displayed. */
 static void
@@ -1870,6 +1899,8 @@ prepare_formats_page (PsppireImportAssistant *ia)
 
   struct caseproto *proto = caseproto_create ();
 
+  dict_set_change_callback (ia->dict, foo, ia);
+
   int i;
   for (i = 0 ; i < dict_get_var_cnt (ia->dict); ++i)
     {
-- 
2.30.2