termion/examples/alternate_screen_raw.rs

41 lines
1.3 KiB
Rust

extern crate termion;
use termion::event::Key;
use termion::input::TermRead;
use termion::raw::IntoRawMode;
use termion::screen::*;
use std::io::{Write, stdout, stdin};
fn write_alt_screen_msg<W: Write>(screen: &mut W) {
write!(screen, "{}{}Welcome to the alternate screen.{}Press '1' to switch to the main screen or '2' to switch to the alternate screen.{}Press 'q' to exit (and switch back to the main screen).",
termion::clear::All,
termion::cursor::Goto(1, 1),
termion::cursor::Goto(1, 3),
termion::cursor::Goto(1, 4)).unwrap();
}
fn main() {
let stdin = stdin();
let mut screen = AlternateScreen::from(stdout().into_raw_mode().unwrap());
write!(screen, "{}", termion::cursor::Hide).unwrap();
write_alt_screen_msg(&mut screen);
screen.flush().unwrap();
for c in stdin.keys() {
match c.unwrap() {
Key::Char('q') => break,
Key::Char('1') => {
write!(screen, "{}", ToMainScreen).unwrap();
}
Key::Char('2') => {
write!(screen, "{}", ToAlternateScreen).unwrap();
write_alt_screen_msg(&mut screen);
}
_ => {}
}
screen.flush().unwrap();
}
write!(screen, "{}", termion::cursor::Show).unwrap();
}