69 lines
1.8 KiB
Rust
69 lines
1.8 KiB
Rust
//! Demonstrates how to read events asynchronously with tokio.
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//!
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//! cargo run --features="event-stream" --example event-stream-tokio
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use std::{io::stdout, time::Duration};
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use futures::{future::FutureExt, select, StreamExt};
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use futures_timer::Delay;
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use crossterm::{
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cursor::position,
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event::{DisableMouseCapture, EnableMouseCapture, Event, EventStream, KeyCode},
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execute,
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terminal::{disable_raw_mode, enable_raw_mode},
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};
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const HELP: &str = r#"EventStream based on futures_util::Stream with tokio
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- Keyboard, mouse and terminal resize events enabled
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- Prints "." every second if there's no event
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- Hit "c" to print current cursor position
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- Use Esc to quit
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"#;
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async fn print_events() {
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let mut reader = EventStream::new();
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loop {
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let mut delay = Delay::new(Duration::from_millis(1_000)).fuse();
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let mut event = reader.next().fuse();
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select! {
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_ = delay => { println!(".\r"); },
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maybe_event = event => {
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match maybe_event {
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Some(Ok(event)) => {
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println!("Event::{:?}\r", event);
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if event == Event::Key(KeyCode::Char('c').into()) {
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println!("Cursor position: {:?}\r", position());
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}
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if event == Event::Key(KeyCode::Esc.into()) {
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break;
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}
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}
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Some(Err(e)) => println!("Error: {:?}\r", e),
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None => break,
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}
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}
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};
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}
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}
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#[tokio::main]
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async fn main() -> std::io::Result<()> {
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println!("{}", HELP);
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enable_raw_mode()?;
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let mut stdout = stdout();
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execute!(stdout, EnableMouseCapture)?;
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print_events().await;
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execute!(stdout, DisableMouseCapture)?;
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disable_raw_mode()
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}
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