bevy 0.4.0

A refreshingly simple data-driven game engine and app framework
Documentation 
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use bevy::{prelude::*, window::ReceivedCharacter};

fn main() {
    App::build()
        .add_plugins(DefaultPlugins)
        .add_system(print_char_event_system.system())
        .run();
}

#[derive(Default)]
struct State {
    event_reader: EventReader<ReceivedCharacter>,
}

/// This system prints out all char events as they come in
fn print_char_event_system(
    mut state: Local<State>,
    char_input_events: Res<Events<ReceivedCharacter>>,
) {
    for event in state.event_reader.iter(&char_input_events) {
        println!("{:?}: '{}'", event, event.char);
    }
}