tts_tui/
event.rs

1use crate::app::AppResult;
2use crossterm::event::{self, Event as CrosstermEvent, KeyEvent, MouseEvent};
3use std::sync::mpsc;
4use std::thread;
5use std::time::{Duration, Instant};
6
7#[derive(Clone, Copy, Debug)]
8pub enum Event {
9    Tick,
10    Key(KeyEvent),
11    Mouse(MouseEvent),
12    Resize(u16, u16),
13}
14
15#[allow(dead_code)]
16#[derive(Debug)]
17pub struct EventHandler {
18    sender: mpsc::Sender<Event>,
19    receiver: mpsc::Receiver<Event>,
20    handler: thread::JoinHandle<()>,
21}
22
23impl EventHandler {
24    pub fn new(tick_rate: u64) -> Self {
25        let tick_rate = Duration::from_millis(tick_rate);
26        let (sender, receiver) = mpsc::channel();
27        let handler = {
28            let sender = sender.clone();
29            thread::spawn(move || {
30                let mut last_tick = Instant::now();
31                loop {
32                    let timeout = tick_rate
33                        .checked_sub(last_tick.elapsed())
34                        .unwrap_or(tick_rate);
35
36                    if event::poll(timeout).expect("no events available") {
37                        match event::read().expect("unable to read event") {
38                            CrosstermEvent::Key(e) => sender.send(Event::Key(e)),
39                            CrosstermEvent::Mouse(e) => sender.send(Event::Mouse(e)),
40                            CrosstermEvent::Resize(w, h) => sender.send(Event::Resize(w, h)),
41                            _ => Ok(()),
42                        }
43                        .ok();
44                    }
45
46                    if last_tick.elapsed() >= tick_rate {
47                        sender.send(Event::Tick).ok();
48                        last_tick = Instant::now();
49                    }
50                }
51            })
52        };
53        Self {
54            sender,
55            receiver,
56            handler,
57        }
58    }
59
60    pub fn next(&self) -> AppResult<Event> {
61        Ok(self.receiver.recv()?)
62    }
63}
tts_tui/event.rs

tts_tui/
event.rs
