'Resets the scheme and fontset of the Tix application to
newScheme and newFontSet, respectively.  This affects only those
widgets created after this call. Therefore, it is best to call the
resetoptions command before the creation of any widgets in a Tix
application.
The optional parameter newScmPrio can be given to reset the
priority level of the Tk options set by the Tix schemes.
Because of the way Tk handles the X option database, after Tix has
been has imported and inited, it is not possible to reset the color
schemes and font sets using the tix config command.  Instead, the
tix_resetoptions command must be used.'

def tix_resetoptions(self, newScheme, newFontSet, newScmPrio=None):

    if (newScmPrio is not None):
        return self.tk.call('tix', 'resetoptions', newScheme, newFontSet, newScmPrio)
    else:
        return self.tk.call('tix', 'resetoptions', newScheme, newFontSet)
        return
