refactor(example): migrate to crossterm

examples/util/event.rs

@@ -1,73 +0,0 @@
-use std::io;
-use std::sync::mpsc;
-use std::thread;
-use std::time::Duration;
-
-use termion::event::Key;
-use termion::input::TermRead;
-
-pub enum Event<I> {
-    Input(I),
-    Tick,
-}
-
-/// A small event handler that wrap termion input and tick events. Each event
-/// type is handled in its own thread and returned to a common `Receiver`
-#[allow(dead_code)]
-pub struct Events {
-    rx: mpsc::Receiver<Event<Key>>,
-}
-
-#[derive(Debug, Clone, Copy)]
-pub struct Config {
-    pub exit_key: Key,
-    pub tick_rate: Duration,
-}
-
-impl Default for Config {
-    fn default() -> Self {
-        Self {
-            exit_key: Key::Char('q'),
-            tick_rate: Duration::from_millis(250),
-        }
-    }
-}
-
-impl Events {
-    pub fn new() -> Self {
-        Self::with_config(Config::default())
-    }
-
-    pub fn with_config(config: Config) -> Self {
-        let (tx, rx) = mpsc::channel();
-        {
-            let tx = tx.clone();
-            thread::spawn(move || {
-                let stdin = io::stdin();
-                #[allow(clippy::manual_flatten)]
-                for evt in stdin.keys() {
-                    if let Ok(key) = evt {
-                        if let Err(err) = tx.send(Event::Input(key)) {
-                            eprintln!("{}", err);
-                            return;
-                        }
-                        if key == config.exit_key {
-                            return;
-                        }
-                    }
-                }
-            })
-        };
-        thread::spawn(move || loop {
-            if tx.send(Event::Tick).is_err() {
-                break;
-            }
-            thread::sleep(config.tick_rate);
-        });
-        Self { rx }
-    }
-
-    pub fn next(&self) -> Result<Event<Key>, mpsc::RecvError> {
-        self.rx.recv()
-    }
-}

examples/util/mod.rs

@@ -1,5 +1,3 @@
-pub mod event;
-
 use tui_tree_widget::{flatten, get_identifier_without_leaf, TreeItem, TreeState};
 
 pub struct StatefulTree<'a> {