+ filter = gtk_file_filter_new();
+ gtk_file_filter_add_pattern(filter, "*.xml");
+ gtk_file_filter_add_pattern(filter, "*.XML");
+ gtk_file_filter_add_mime_type(filter, "text/xml");
+ gtk_file_filter_set_name(filter, "XML file");
+ gtk_file_chooser_set_filter(GTK_FILE_CHOOSER(dialog), filter);
+