struct RadioGroup a < WWidget StdOpt, Cell(Maybe a) radio :: (Show a, Read a) => BasicWindow b -> [([RadioButtonOpt],a)] -> [StdOpt] -> Int -> Cmd(RadioGroup a)A radio group is a WWidget StdOpt and also a Cell for values that can be translated to and from Strings. The function radio can be used to create RadioGroup instances. It has four arguments:
Arguments are
Arguments are the Tk environment, window title, message in the window, default text in entry and callback procedure.