minesweeper_curses.py 文件源码

def open_menu(stdscr, items):
    """Opens a menu containing items and returns the selected item.
    Blocks until the user selected an item.
    """
    width = max(map(len, items)) + 20
    height = len(items*2)-1 + 4 # +2 for frame, +2 for padding
    curses.curs_set(False)
    selected = 0

    while True:
        center = (curses.COLS//2, curses.LINES//2)
        menu_rect = Rect(center[0]-width//2, center[1]-height//2, width, height)
        menu_rect = draw_frame(stdscr, menu_rect, thick_border=True)
        for i, item in enumerate(items):
            attr = curses.A_NORMAL
            if i == selected:
                attr = curses.A_STANDOUT
            stdscr.addstr(menu_rect.y + 1 + i*2, center[0] - len(item)//2, item, attr)

        c = stdscr.getch()
        if c == curses.KEY_UP:
            selected -= 1
        if c == curses.KEY_DOWN:
            selected += 1
        if c == curses.KEY_ENTER or c == 10:
            break
        selected = clamp(selected, 0, len(items)-1)
    curses.curs_set(True)
    return items[selected]