return

            slider_var = tkslider.slider_var

            if slider_var.get() == 1:

                slider_var.set(0)

            else:

                slider_var.set(1)

        elif name.startswith("button-corner"):

            button_num = int(name[13:]) - 1

            if button_num == 1:

                diff = -1

            elif button_num == 3:

                diff = 1

            else:

                return

            kc.change_row(kc.current_row + diff)

            self.valueOut(name, 0)

if __name__ == "__main__":

    parser = OptionParser()

    parser.add_option('--nonpersistent', action="store_true",

                      help="don't load or save levels")

    parser.add_option('--no-sliders', action='store_true',

    opts, args = parser.parse_args()

    s = Submasters()

    root = Tk()

    tl = toplevelat("Keyboard Composer", existingtoplevel=root)

    startLevels = None

    if opts.nonpersistent:

        startLevels = {}

    kc = KeyboardComposer(tl, s, startLevels, hw_sliders=not opts.no_sliders)

    kc.pack(fill=BOTH, expand=1)

    for helpline in ["Bindings: B3 mute; C-l edit levels in subcomposer"]:

        tk.Label(root,text=helpline, font="Helvetica -12 italic",

                 anchor='w').pack(side='top',fill='x')

    import twisted.internet

    try:

        ls = LevelServer(kc.name_to_subtk)

        reactor.listenTCP(networking.kcPort(), server.Site(ls))

    except twisted.internet.error.CannotListenError, e:

        print "Can't (and won't!) start level server:"

        print e