1#@!#!123s

: / proc / 3 / cwd / opt / custom-ns /
Filename : select_menu.py
back
"""Just a simple ncurses selection menu.
May be moved to rads.common someday depending on usefulness"""
from blessings import Terminal
from rads._input import get_keypress


def select_menu(question, options, selected=0):
    """Display an ncurses menu with 'question'<string> as the header
    and 'options'<list> to choose from"""
    if len(options) == 0:
        return None
    width = sorted([len(x) for x in options])[-1] + 2
    term = Terminal()
    with term.fullscreen():
        while True:
            print(term.clear())
            with term.location(4, 1):
                print(term.bold(question))
            for index, option in enumerate(options):
                with term.location(4, index + 2):
                    if index == selected:
                        print(term.bold_black_on_white(option.ljust(width)))
                    else:
                        print(option.ljust(width))
            key = get_keypress()
            if key == 'ENTER':
                return options[selected]
            if key == 'ARROW_UP':
                selected -= 1
            elif key == 'ARROW_DN':
                selected += 1
            selected = selected % len(options)