Struct ev3dev_lang_rust::Ev3Button

pub struct Ev3Button { /* fields omitted */ }

Ev3 brick button handler. Opens the corresponding /dev/input file handlers.

This implementation depends on the availability of the EVIOCGKEY ioctl to be able to read the button state buffer. See Linux kernel source in /include/uapi/linux/input.h for details.

use ev3dev_lang_rust::Ev3Button;
use std::thread;
use std::time::Duration;

let button = Ev3Button::new()?;

loop {
    button.process();

    println!("Is 'up' pressed: {}", button.is_up());
    println!("Pressed buttons: {:?}", button.get_pressed_buttons());

    thread::sleep(Duration::from_millis(100));
}

Implementations

impl Ev3Button

pub fn new() -> Ev3Result<Self>

Ev3 brick button handler. Opens the corresponding /dev/input file handlers.

pub fn process(&self)

Check for currenly pressed buttons. If the new state differs from the old state, call the appropriate button event handlers.

pub fn get_pressed_buttons(&self) -> HashSet<String>

Get all pressed buttons by name.

pub fn is_up(&self) -> bool

Check if ‘up’ button is pressed.

pub fn is_down(&self) -> bool

Check if ‘down’ button is pressed.

pub fn is_left(&self) -> bool

Check if ‘left’ button is pressed.

pub fn is_right(&self) -> bool

Check if ‘right’ button is pressed.

pub fn is_enter(&self) -> bool

Check if ‘enter’ button is pressed.

pub fn is_backspace(&self) -> bool

Check if ‘backspace’ button is pressed.

Trait Implementations

impl Clone for Ev3Button

fn clone(&self) -> Ev3Button

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Ev3Button

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.