Struct sdl2::keyboard::KeyboardState

pub struct KeyboardState<'a> { /* fields omitted */ }

Methods

impl<'a> KeyboardState<'a>

pub fn new(_e: &'a EventPump) -> KeyboardState<'a>

pub fn is_scancode_pressed(&self, scancode: Scancode) -> bool

Returns true if the scancode is pressed.

Example

use sdl2::keyboard::Scancode;

fn is_a_pressed(e: &sdl2::EventPump) -> bool {
    e.keyboard_state().is_scancode_pressed(Scancode::A)
}

pub fn scancodes(&self) -> ScancodeIterator

Returns an iterator all scancodes with a boolean indicating if the scancode is pressed.

pub fn pressed_scancodes(&self) -> PressedScancodeIterator

Returns an iterator of pressed scancodes.

Example

use sdl2::keyboard::Keycode;
use sdl2::keyboard::Scancode;
use std::collections::HashSet;

fn pressed_scancode_set(e: &sdl2::EventPump) -> HashSet<Scancode> {
    e.keyboard_state().pressed_scancodes().collect()
}

fn pressed_keycode_set(e: &sdl2::EventPump) -> HashSet<Keycode> {
    e.keyboard_state().pressed_scancodes()
        .filter_map(Keycode::from_scancode)
        .collect()
}

fn newly_pressed(old: &HashSet<Scancode>, new: &HashSet<Scancode>) -> HashSet<Scancode> {
    new - old
    // sugar for: new.difference(old).collect()
}