62 lines
1.5 KiB
Rust
62 lines
1.5 KiB
Rust
|
//! Demonstrates how to match on modifiers like: Control, alt, shift.
|
||
|
|
//!
|
||
|
|
//! cargo run --example event-poll-read
|
||
|
|
|
||
|
|
use std::{io, time::Duration};
|
||
|
|
|
||
|
|
use crossterm::{
|
||
|
|
cursor::position,
|
||
|
|
event::{poll, read, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
|
||
|
|
execute,
|
||
|
|
terminal::{disable_raw_mode, enable_raw_mode},
|
||
|
|
};
|
||
|
|
|
||
|
|
const HELP: &str = r#"Blocking poll() & non-blocking read()
|
||
|
|
- Keyboard, mouse and terminal resize events enabled
|
||
|
|
- Prints "." every second if there's no event
|
||
|
|
- Hit "c" to print current cursor position
|
||
|
|
- Use Esc to quit
|
||
|
|
"#;
|
||
|
|
|
||
|
|
fn print_events() -> io::Result<()> {
|
||
|
|
loop {
|
||
|
|
// Wait up to 1s for another event
|
||
|
|
if poll(Duration::from_millis(1_000))? {
|
||
|
|
// It's guaranteed that read() won't block if `poll` returns `Ok(true)`
|
||
|
|
let event = read()?;
|
||
|
|
|
||
|
|
println!("Event::{:?}\r", event);
|
||
|
|
|
||
|
|
if event == Event::Key(KeyCode::Char('c').into()) {
|
||
|
|
println!("Cursor position: {:?}\r", position());
|
||
|
|
}
|
||
|
|
|
||
|
|
if event == Event::Key(KeyCode::Esc.into()) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
// Timeout expired, no event for 1s
|
||
|
|
println!(".\r");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
Ok(())
|
||
|
|
}
|
||
|
|
|
||
|
|
fn main() -> io::Result<()> {
|
||
|
|
println!("{}", HELP);
|
||
|
|
|
||
|
|
enable_raw_mode()?;
|
||
|
|
|
||
|
|
let mut stdout = io::stdout();
|
||
|
|
execute!(stdout, EnableMouseCapture)?;
|
||
|
|
|
||
|
|
if let Err(e) = print_events() {
|
||
|
|
println!("Error: {:?}\r", e);
|
||
|
|
}
|
||
|
|
|
||
|
|
execute!(stdout, DisableMouseCapture)?;
|
||
|
|
|
||
|
|
disable_raw_mode()
|
||
|
|
}
|