39ef1e42ba
Partially addresses #792 * Implement Display for KeyCode and KeyModifiers * Add demo for Display implementation
50 lines
1.2 KiB
Rust
50 lines
1.2 KiB
Rust
//! Demonstrates the display format of key events.
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//!
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//! This example demonstrates the display format of key events, which is useful for displaying in
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//! the help section of a terminal application.
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//!
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//! cargo run --example key-display
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use std::io;
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use crossterm::event::{KeyEventKind, KeyModifiers};
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use crossterm::{
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event::{read, Event, KeyCode},
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terminal::{disable_raw_mode, enable_raw_mode},
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};
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const HELP: &str = r#"Key display
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- Press any key to see its display format
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- Use Esc to quit
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"#;
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fn main() -> io::Result<()> {
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println!("{}", HELP);
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enable_raw_mode()?;
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if let Err(e) = print_events() {
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println!("Error: {:?}\r", e);
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}
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disable_raw_mode()?;
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Ok(())
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}
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fn print_events() -> io::Result<()> {
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loop {
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let event = read()?;
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match event {
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Event::Key(event) if event.kind == KeyEventKind::Press => {
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print!("Key pressed: ");
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if event.modifiers != KeyModifiers::NONE {
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print!("{}+", event.modifiers);
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}
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println!("{}\r", event.code);
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if event.code == KeyCode::Esc {
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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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Ok(())
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}
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