fdtd-coremem/src/bin/viewer.rs

use coremem::post::{Loader, Viewer};
use std::path::PathBuf;
use std::time::Duration;
use structopt::StructOpt;
use crossterm::event::{Event, KeyCode};

#[derive(Debug, StructOpt)]
struct Opt {
    directory: PathBuf,
}

fn event_loop(mut viewer: Viewer) {
    loop {
        let mut time_steps = 0;
        let mut z_steps = 0;
        while crossterm::event::poll(Duration::from_millis(16)).unwrap() {
            match crossterm::event::read().unwrap() {
                Event::Key(e) => match e.code {
                    KeyCode::Left => time_steps -= 1,
                    KeyCode::PageUp => time_steps -= 10,
                    KeyCode::Right => time_steps += 1,
                    KeyCode::PageDown => time_steps += 10,
                    KeyCode::Up => z_steps += 1,
                    KeyCode::Down => z_steps -= 1,
                    KeyCode::Char('q') => return,
                    _ => {},
                },
                _ => {},
            }
        }
        viewer.navigate(time_steps, z_steps);
    }
}

fn main() {
    let opt = Opt::from_args();
    let loader = Loader::new(opt.directory);
    let viewer = Viewer::new(loader);

    // disable line buffering
    crossterm::terminal::enable_raw_mode().unwrap();

    viewer.render();
    event_loop(viewer);

    // return the terminal to its original state
    crossterm::terminal::disable_raw_mode().unwrap();
}