hello_world.rs

extern crate piston_window;
extern crate piston;
use piston_window::*;
use piston::input::*;
use piston::event_loop::*;

fn main() {
    let mut window: PistonWindow = WindowSettings::new("Hello Piston!", [640, 480]).exit_on_esc(true).build().unwrap();;
    while let Some(e) = window.next() {
       window.draw_2d(&e, |_c, g| {
           clear([0.5, 1.0, 0.5, 1.0], g);
       });
    }
    let mut events = Events::new(EventSettings::new().lazy(true));
    while let Some(e) = events.next(&mut window)
    {
        if let Some(button) = e.release_args() {
            match Button {
                Button::Keyboard(key) => println!("Released keyboard key '{:?}'", key),
            }
        }
    };
}