[Glade-users] GtkClist Problem (Seg fault)

[Tristan Van Berkom]

guillaume at ruch.infini.fr wrote:

>Hello all,
>
>I've Got a problem with creayion of a GtkClist.... I'm developping a small
>mysql interface which only deals withs 3 tables. I've got 3 buttons which
>may build each a dynamic clist to display the content of the selected
>table in the same widget. When I compile it, it returns :
>
>(project2:1390): Gtk-CRITICAL **: gtk_object_set_data_full: assertion
>`GTK_IS_OBJECT (object)' failed
>Erreur de segmentation
>
>gtk_clist_new...OK
>
>(project2:30722): Gtk-CRITICAL **: gtk_object_set: assertion
>`GTK_IS_OBJECT (object)' failed
>gtk_object_set_data_full...OK
>
>(project2:30722): Gtk-CRITICAL **: gtk_object_set_data_full: assertion
>`GTK_IS_OBJECT (object)' failed
>Erreur de segmentation
>
>
>The Widget is called dyn_clist and is called by an event on the button
>"CLients" Here's the code :
>
>GtkWidget *dyn_clist (gchar *nom_table)
>{
>  GtkWidget *Stox_main;
>  GtkWidget *scrolledwindow1;
>  GtkWidget *clist1;
>  GtkWidget *label;
>  gint      i;
>  gint      cols = 3;
>  gchar     *sql;
>  MYSQL_RES *res_str;
>  MYSQL_ROW db_row;
>  MYSQL_FIELD *field;
>
>
>	gchar     *row[15] = {"", "", "", "", "",
>                       	      "", "", "", "", "",
>                              "", "", "", "", ""};
>
> scrolledwindow1 = gtk_scrolled_window_new (NULL, NULL);
> gtk_widget_show (scrolledwindow1);
>  sql = g_strconcat("select * from ", nom_table, 0L);
>  g_print("sql is: %s\n", sql);
>  if (mysql_query (conn, sql) != 0)
>   {
>      g_print("Echec de la requete...\n");
>      return 0L;
>   }
>  res_str = mysql_store_result (conn);
> g_print("mysql_store_result...OK\n");
>
>  cols = mysql_num_fields(res_str);
>
>  clist1 = gtk_clist_new (cols);
>  /*gtk_object_set_data_full(GTK_OBJECT(Stox_main),
>             "clist1", clist1,
>             0L); */
>  
>
You are calling gtk_object_set_data_full() on Stox_main, and Stox_main here
is an uninitialized pointer, so you are feeding random addresses to tha api.

Cheers,
                              -Tristan

PS: gtk_object_* is deprecated, use g_object_* instead. GtkCList is also
deprecated and unsupported, you should use treeviews instead.

deprecated stuff is marked as such in the api docs: http://www.gtk.org/api/

PPS: afaiac you are welcome to ask gtk+ related questions here but you'll
have a greater audience in the gtk application list: 
gtk-app-devel-list at gnome.org