c = gtk.FileChooserDialog(title, parent, action=action, buttons=buttons)
        c.set_do_overwrite_confirmation(True)

        # Params
        if fn:
            c.set_current_name(fn)
            fn = ""
        for fname,ftype in (formats or uikit.save_formats):
            f = gtk.FileFilter()
            f.set_name(fname)
            f.add_pattern(ftype)
            c.add_filter(f)
        # Yes, that's how to retrieve signals for changed filter selections
        try:
            filterbox = c.get_children()[0].get_children()[0]