use bevy::prelude::*;
fn main() {
App::new()
.add_plugins(DefaultPlugins)
.add_event::<MyEvent>()
.add_event::<PlaySound>()
.init_resource::<EventTriggerState>()
.add_systems(Update, (event_trigger, event_listener, sound_player))
.run();
}
#[derive(Event)]
struct MyEvent {
pub message: String,
}
#[derive(Event, Default)]
struct PlaySound;
#[derive(Resource)]
struct EventTriggerState {
event_timer: Timer,
}
impl Default for EventTriggerState {
fn default() -> Self {
EventTriggerState {
event_timer: Timer::from_seconds(1.0, TimerMode::Repeating),
}
}
}
fn event_trigger(
time: Res<Time>,
mut state: ResMut<EventTriggerState>,
mut my_events: EventWriter<MyEvent>,
mut play_sound_events: EventWriter<PlaySound>,
) {
if state.event_timer.tick(time.delta()).finished() {
my_events.send(MyEvent {
message: "MyEvent just happened!".to_string(),
});
play_sound_events.send_default();
}
}
fn event_listener(mut events: EventReader<MyEvent>) {
for my_event in events.read() {
info!("{}", my_event.message);
}
}
fn sound_player(mut play_sound_events: EventReader<PlaySound>) {
for _ in play_sound_events.read() {
info!("Playing a sound");
}
}