Feed it keys from crossterm

Every part of the footer that takes keys takes the crate’s own Key: Help, Confirm, Input and QuitGuard. It is a small enum, so the crate needs no backend:

pub enum Key {
    Char(char), Ctrl(char), Alt(char), Tab, BackTab, Enter, Esc, Backspace,
    Left, Right, Up, Down, Home, End, Delete, Other,
}

It is #[non_exhaustive]: match it with a wildcard arm.

From crossterm

With the crossterm feature (crossterm 0.29), Key::from takes a crossterm KeyEvent:

pito-footer = { git = "https://github.com/gmrdad82/pito-footer", tag = "v1.0.1", features = ["crossterm"] }

use pito_footer::Key;
use ratatui::crossterm::event::{self, Event};

if let Event::Key(event) = event::read()? {
    let key = Key::from(event);
}

The conversion:

• keeps Alt apart: Key::Alt('y') is not Key::Char('y'), so Alt+y does not answer Yes in a confirm;
• turns Alt, Super, Meta or Hyper on any other key into Key::Other;
• passes Ctrl+Alt plus a character on as that character, which is how AltGr arrives on some platforms, so diacritics can still be typed into an Input.

From another backend

Without the feature, build the Key in the app: Key::Char('q'), Key::Ctrl('c'), Key::Enter. Anything the footer doesn’t use can be Key::Other.