curses_d.py 文件源码

def configure_settings(self, pos=None, key_in=None):
        """
        Perform operations to config settings if `Configure Setting` frame is
        active, or just draw the `Configure Setting` frame with no items
        selected while it is inactive.

        .. note:: Whether the `Configure Setting` frame is inactive is decided
            by if :attr:`pos` is `None` or not.

                ===========  ========
                :attr:`pos`  Status
                ===========  ========
                None         Inactive
                int          Active
                ===========  ========

        :param pos: Index of selected item in `Configure Setting` frame. The
            default value of `pos` is `None`.
        :type pos: int or None
        :param key_in: A flag indicating the key pressed by user. The default
            value of `key_in` is `None`.
        :type key_in: int or None
        :return: Index of selected item in `Configure Setting` frame.
        :rtype: int or None
        """
        id_num = range(len(self.settings))
        if pos is not None:
            if key_in == curses.KEY_DOWN:
                pos = list(id_num[1:] + id_num[:1])[pos]
            elif key_in == curses.KEY_UP:
                pos = list(id_num[-1:] + id_num[:-1])[pos]
            elif key_in in [10, 32]:
                self.sub_selection(pos)
            self.info(pos, 0)
        self.configure_settings_frame(pos)
        return pos