52 lines
1.4 KiB
Rust
52 lines
1.4 KiB
Rust
#![feature(step_by)]
|
|
|
|
extern crate termion;
|
|
|
|
use termion::event::Key;
|
|
use termion::input::TermRead;
|
|
use termion::raw::IntoRawMode;
|
|
use std::io::{Write, stdout, stdin};
|
|
|
|
fn rainbow<W: Write>(stdout: &mut W, blue: u8) {
|
|
write!(stdout, "{}{}", termion::cursor::Goto(1, 1), termion::clear::All).unwrap();
|
|
|
|
for red in (0..255).step_by(8 as u8) {
|
|
for green in (0..255).step_by(4) {
|
|
write!(stdout, "{} ", termion::color::Bg(termion::color::Rgb(red, green, blue))).unwrap();
|
|
}
|
|
write!(stdout, "\n\r").unwrap();
|
|
}
|
|
|
|
writeln!(stdout, "{}b = {}", termion::style::Reset, blue).unwrap();
|
|
}
|
|
|
|
fn main() {
|
|
let stdin = stdin();
|
|
let mut stdout = stdout().into_raw_mode().unwrap();
|
|
|
|
writeln!(stdout, "{}{}{}Use the arrow keys to change the blue in the rainbow.",
|
|
termion::clear::All,
|
|
termion::cursor::Goto(1, 1),
|
|
termion::cursor::Hide).unwrap();
|
|
|
|
let mut blue = 172u8;
|
|
|
|
for c in stdin.keys() {
|
|
match c.unwrap() {
|
|
Key::Up => {
|
|
blue = blue.saturating_add(4);
|
|
rainbow(&mut stdout, blue);
|
|
},
|
|
Key::Down => {
|
|
blue = blue.saturating_sub(4);
|
|
rainbow(&mut stdout, blue);
|
|
},
|
|
Key::Char('q') => break,
|
|
_ => {},
|
|
}
|
|
stdout.flush().unwrap();
|
|
}
|
|
|
|
write!(stdout, "{}", termion::cursor::Show).unwrap();
|
|
}
|