Il Sat, 01 Mar 2014 19:35:08 +0100 Stefan Salewski <mail@xxxxxxxxxxxx> scrisse: > On Sat, 2014-03-01 at 02:08 +0100, Stefan Salewski wrote: > [...] > Here is my complete C code: > > http://www.ssalewski.de/tmp/test.c > > I inserted these lines: > > void on_row_inserted(GtkTreeModel *tree_model, GtkTreePath *path, > GtkTreeIter *iter, gpointer user_data) > { > char *value; > printf("row_inserted\n"); > gtk_tree_model_get(tree_model, iter, LIST_ITEM, &value, -1); > g_printf("value = %s\n", value); > gint *i = gtk_tree_path_get_indices(path); > g_printf("row ins = %d\n", i[0]); > } > > void on_row_deleted(GtkTreeModel *tree_model, GtkTreePath *path, gpointer user_data) > { > printf("row_deleted\n"); > gint *i = gtk_tree_path_get_indices(path); > g_printf("row del = %d\n", i[0]); > } > > First question: > When I exchange rows by drag and drop, I get > > value = (null) > > similar to my test from Ruby yesterday. Is this intended, or is my code > wrong (I have not much practice with using GTK from plain C...) Hi, this is intended behavior. The problem is the insertion is done in two steps: (1) an empty row is created (and your on_row_inserted() callback is called) and (2) that row is filled with data. If you want 'value' to be meaningful you must postpone your callback, e.g. by using g_idle_add(). Try to substitute your on_row_inserted() with the following code: typedef struct { GtkTreeModel *model; GtkTreePath *path; } CallbackData; static gboolean real_row_inserted(CallbackData *data) { GtkTreeIter iter; if (gtk_tree_model_get_iter(data->model, &iter, data->path)) { gchar *value; gtk_tree_model_get(data->model, &iter, LIST_ITEM, &value, -1); g_print("Row inserted: value = '%s'\n", value); g_free(value); } gtk_tree_path_free(data->path); g_free(data); return FALSE; } static void on_row_inserted(GtkTreeModel *tree_model, GtkTreePath *path, GtkTreeIter *iter, gpointer user_data) { CallbackData *data = g_new(CallbackData, 1); data->model = tree_model; data->path = gtk_tree_path_copy(path); g_idle_add((GSourceFunc) real_row_inserted, data); } Ciao. -- Nicola _______________________________________________ gtk-list mailing list gtk-list@xxxxxxxxx https://mail.gnome.org/mailman/listinfo/gtk-list
