b717d306c3
When you want to work with the 'alternate screen' you can call the following functions: terminal::from_screen etc. Which will give you an instance to the back of the module you are calling it in. So instead of: let color = color(Screen::default()); let cursor = cursor(Screen::default()); let input = input(Screen::default()); let terminal = terminal(Screen::default()); You can do: let color = color(); let cursor = cursor(); let input = input(); let terminal = terminal();
134 lines
3.6 KiB
Rust
134 lines
3.6 KiB
Rust
extern crate crossterm;
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use self::crossterm::{Crossterm, Screen};
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use self::crossterm::terminal::ClearType;
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use self::crossterm::input::input;
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use std::{thread, time};
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use std::io::{stdout, Read, Write};
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use std::time::Duration;
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/// this will capture the input until the given key.
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pub fn read_async_until() {
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// create raw screen
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let crossterm = Crossterm::new();
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// init some modules we use for this demo
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let input = crossterm.input();
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let terminal = crossterm.terminal();
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let mut cursor = crossterm.cursor();
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let mut stdin = input.read_until_async(b'\r').bytes();
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for i in 0..100 {
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terminal.clear(ClearType::All);
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cursor.goto(1, 1);
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let a = stdin.next();
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println!("pressed key: {:?}", a);
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if let Some(Ok(b'\r')) = a {
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println!("The enter key is hit and program is not listening to input anymore.");
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break;
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}
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if let Some(Ok(b'x')) = a {
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println!("The key: x was pressed and program is terminated.");
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break;
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}
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thread::sleep(time::Duration::from_millis(100));
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}
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}
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/// this will read pressed characters async until `x` is typed.
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pub fn read_async() {
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let input = input();
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let mut stdin = input.read_async().bytes();
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for _i in 0..100 {
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let a = stdin.next();
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println!("pressed key: {:?}", a);
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if let Some(Ok(b'x')) = a {
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println!("The key: `x` was pressed and program is terminated.");
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break;
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}
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thread::sleep(time::Duration::from_millis(50));
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}
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}
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pub fn read_async_demo() {
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let screen = Screen::new(true);
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let crossterm = Crossterm::from_screen(&screen);
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// init some modules we use for this demo
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let input = crossterm.input();
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let terminal = crossterm.terminal();
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let mut cursor = crossterm.cursor();
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// this will setup the async reading.
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let mut stdin = input.read_async().bytes();
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// clear terminal and reset the cursor.
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terminal.clear(ClearType::All);
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cursor.goto(1, 1);
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// loop until the enter key (\r) is pressed.
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loop {
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terminal.clear(ClearType::All);
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cursor.goto(1, 1);
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// get the next pressed key
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let pressed_key = stdin.next();
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terminal.write(format!("{:?} <- Character pressed", pressed_key));
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// check if pressed key is enter (\r)
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if let Some(Ok(b'\r')) = pressed_key {
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break;
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}
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// wait 200 ms and reset cursor write
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thread::sleep(Duration::from_millis(200));
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}
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}
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pub fn async_reading_on_alternate_screen() {
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let screen = Screen::new(false);
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// switch to alternate screen
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if let Ok(alternate) = screen.enable_alternate_modes(true)
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{
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let crossterm = Crossterm::from_screen(&alternate.screen);
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// init some modules we use for this demo
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let input = crossterm.input();
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let terminal = crossterm.terminal();
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let mut cursor = crossterm.cursor();
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// this will setup the async reading.
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let mut stdin = input.read_async().bytes();
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// loop until the enter key (\r) is pressed.
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loop {
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terminal.clear(ClearType::All);
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cursor.goto(1, 1);
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// get the next pressed key
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let pressed_key = stdin.next();
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terminal.write(format!("{:?} <- Character pressed", pressed_key));
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// check if pressed key is enter (\r)
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if let Some(Ok(b'\r')) = pressed_key {
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break;
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}
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// wait 200 ms and reset cursor write
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thread::sleep(Duration::from_millis(200));
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}
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}
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}
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