'Draw the main frame of `Setup` tab in the TUI window.'

def setup_menu(self):

    screen = self._stdscr.subwin(21, 80, 2, 0)
    screen.box()
    screen.bkgd('    ', curses.color_pair(4))
    screen.addch(0, 26, curses.ACS_BSSS)
    screen.vline(1, 26, curses.ACS_VLINE, 17)
    screen.addch(7, 0, curses.ACS_SSSB)
    screen.addch(7, 26, curses.ACS_SBSS)
    screen.hline(7, 1, curses.ACS_HLINE, 25)
    screen.addch(0, 52, curses.ACS_BSSS)
    screen.vline(1, 52, curses.ACS_VLINE, 17)
    screen.addch(18, 0, curses.ACS_SSSB)
    screen.addch(18, 79, curses.ACS_SBSS)
    screen.hline(18, 1, curses.ACS_HLINE, 78)
    screen.addch(18, 26, curses.ACS_SSBS)
    screen.addch(18, 52, curses.ACS_SSBS)
    title = curses.color_pair(6)
    subtitles = [['Configure    Settings', (1, 2)], ['Status', (8, 2)], ['Hosts    File', (13, 2)], ['Select    Functions', (1, 28)]]
    for s_title in subtitles:
        cord = s_title[1]
        screen.addstr(cord[0], cord[1], s_title[0], title)
        screen.hline((cord[0] + 1), cord[1], curses.ACS_HLINE, 23)
    screen.refresh()
