+
+struct file_types
+{
+ const gchar *label;
+ const gchar *ext;
+};
+
+enum
+ {
+ FT_AUTO = 0,
+ FT_PDF,
+ FT_HTML,
+ FT_ODT,
+ FT_TXT,
+ FT_PS,
+ FT_CSV,
+ n_FT
+ };
+
+#define N_EXTENTIONS (n_FT - 1)
+
+struct file_types ft[n_FT] = {
+ {N_("Infer file type from extention"), NULL},
+ {N_("PDF (*.pdf)"), ".pdf"},
+ {N_("HTML (*.html)"), ".html"},
+ {N_("OpenDocument (*.odt)"), ".odt"},
+ {N_("Text (*.txt)"), ".txt"},
+ {N_("PostScript (*.ps)"), ".ps"},
+ {N_("Comma-Separated Values (*.csv)"), ".csv"}
+};
+
+
+static void
+on_combo_change (GtkFileChooser *chooser)
+{
+ gboolean sensitive = FALSE;
+ GtkWidget *combo = gtk_file_chooser_get_extra_widget (chooser);
+
+ int x = 0;
+ gchar *fn = gtk_file_chooser_get_filename (chooser);
+
+ if (combo && GTK_WIDGET_REALIZED (combo))
+ x = gtk_combo_box_get_active (GTK_COMBO_BOX (combo));
+
+ if (fn == NULL)
+ {
+ sensitive = FALSE;
+ }
+ else
+ {
+ gint i;
+ if ( x != 0 )
+ sensitive = TRUE;
+
+ for (i = 1 ; i < N_EXTENTIONS ; ++i)
+ {
+ if ( g_str_has_suffix (fn, ft[i].ext))
+ {
+ sensitive = TRUE;
+ break;
+ }
+ }
+ }
+
+ g_free (fn);
+
+ gtk_dialog_set_response_sensitive (GTK_DIALOG (chooser), GTK_RESPONSE_ACCEPT, sensitive);
+}
+
+
+static void
+on_file_chooser_change (GObject *w, GParamSpec *pspec, gpointer data)
+{
+
+ GtkFileChooser *chooser = data;
+ const gchar *name = g_param_spec_get_name (pspec);
+
+ if ( ! GTK_WIDGET_REALIZED (chooser))
+ return;
+
+ /* Ignore this one. It causes recursion. */
+ if ( 0 == strcmp ("tooltip-text", name))
+ return;
+
+ on_combo_change (chooser);
+}
+
+
+/* Recursively descend all the children of W, connecting
+ to their "notify" signal */
+static void
+iterate_widgets (GtkWidget *w, gpointer data)
+{
+ if ( GTK_IS_CONTAINER (w))
+ gtk_container_forall (GTK_CONTAINER (w), iterate_widgets, data);
+ else
+ g_signal_connect (w, "notify", G_CALLBACK (on_file_chooser_change), data);
+}
+
+
+
+static GtkListStore *
+create_file_type_list (void)
+{
+ int i;
+ GtkTreeIter iter;
+ GtkListStore *list = gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_STRING);
+
+ for (i = 0 ; i < 6 ; ++i)
+ {
+ gtk_list_store_append (list, &iter);
+ gtk_list_store_set (list, &iter,
+ 0, gettext (ft[i].label),
+ 1, ft[i].ext,
+ -1);
+ }
+
+ return list;
+}
+