def drawRightStatus(self, scr, vs):
        'Draw right side of status bar.  Return length displayed.'
        rightx = self.windowWidth-1

        ret = 0
        for rstatcolor in self.callHook('rstatus', vs):
            if rstatcolor:
                try:
                    rstatus, coloropt = rstatcolor
                    rstatus = ' '+rstatus
                    attr = colors.get_color(coloropt).attr
                    statuslen = clipdraw(scr, self.windowHeight-1, rightx, rstatus, attr, rtl=True)
                    rightx -= statuslen
                    ret += statuslen
                except Exception as e:
                    self.exceptionCaught(e)

        if scr:
            curses.doupdate()
        return ret
Draw right side of status bar.  Return length displayed.