src/vendor/termion/examples/async.rs

   1 extern crate termion;
   2
   3 use termion::raw::IntoRawMode;
   4 use termion::async_stdin;
   5 use std::io::{Read, Write, stdout};
   6 use std::thread;
   7 use std::time::Duration;
   8
   9 fn main() {
  10     let stdout = stdout();
  11     let mut stdout = stdout.lock().into_raw_mode().unwrap();
  12     let mut stdin = async_stdin().bytes();
  13
  14     write!(stdout,
  15            "{}{}",
  16            termion::clear::All,
  17            termion::cursor::Goto(1, 1))
  18             .unwrap();
  19
  20     loop {
  21         write!(stdout, "{}", termion::clear::CurrentLine).unwrap();
  22
  23         let b = stdin.next();
  24         write!(stdout, "\r{:?}    <- This demonstrates the async read input char. Between each update a 100 ms. is waited, simply to demonstrate the async fashion. \n\r", b).unwrap();
  25         if let Some(Ok(b'q')) = b {
  26             break;
  27         }
  28
  29         stdout.flush().unwrap();
  30
  31         thread::sleep(Duration::from_millis(50));
  32         stdout.write_all(b"# ").unwrap();
  33         stdout.flush().unwrap();
  34         thread::sleep(Duration::from_millis(50));
  35         stdout.write_all(b"\r #").unwrap();
  36         write!(stdout, "{}", termion::cursor::Goto(1, 1)).unwrap();
  37         stdout.flush().unwrap();
  38     }
  39 }