Created
July 17, 2025 15:59
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A program to display what keyboard events the terminal is receiving
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| use std::time::{Duration, Instant}; | |
| use ratatui::{ | |
| crossterm::event::{self, Event, KeyEventKind}, | |
| symbols, | |
| text::Line, | |
| widgets::{Block, Padding, Paragraph, Widget}, | |
| }; | |
| fn main() { | |
| let mut terminal = ratatui::init(); | |
| terminal.clear().unwrap(); | |
| let mut key_events: Vec<(Instant, event::KeyEvent)> = Vec::new(); | |
| loop { | |
| if event::poll(std::time::Duration::from_millis(50)).unwrap() | |
| && let Event::Key(key) = event::read().unwrap() | |
| { | |
| key_events.push((Instant::now(), key)); | |
| } | |
| // if esc hit 3 times in last 1.5 seconds, exit | |
| if key_events | |
| .iter() | |
| .rev() | |
| .filter(|(time, key)| { | |
| key.code == ratatui::crossterm::event::KeyCode::Esc | |
| && time.elapsed().as_millis() < 1500 | |
| && key.kind == KeyEventKind::Press | |
| }) | |
| .count() | |
| >= 3 | |
| { | |
| break; | |
| } | |
| terminal | |
| .draw(|f| { | |
| Paragraph::new( | |
| key_events | |
| .iter() | |
| .rev() | |
| .take(f.area().height as usize - 2) | |
| .map(|(time, key)| { | |
| Line::from(format!( | |
| "{:>14} ago: {:?}", | |
| humantime::format_duration(Duration::from_millis( | |
| time.elapsed().as_millis() as u64 | |
| )) | |
| .to_string(), | |
| key | |
| )) | |
| }) | |
| .collect::<Vec<_>>(), | |
| ) | |
| .block( | |
| Block::bordered() | |
| .title("Key Events (Hit Esc 3 times to exit)") | |
| .border_set(symbols::border::ROUNDED) | |
| .padding(Padding::uniform(1)), | |
| ) | |
| .render(f.area(), f.buffer_mut()); | |
| }) | |
| .unwrap(); | |
| } | |
| ratatui::restore(); | |
| } |
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