6d6bc2a8b4
This is extracted out of eb8f973646476b4a4926ba644a77e2b3a5772159 and includes some additional changes to remove all references to AppBuilder and fix examples that still used App::build() instead of App::new(). In addition I didn't extract the sub app feature as it isn't ready yet. You can use `git diff --diff-filter=M eb8f973646476b4a4926ba644a77e2b3a5772159` to find all differences in this PR. The `--diff-filtered=M` filters all files added in the original commit but not in this commit away. Co-Authored-By: Carter Anderson <mcanders1@gmail.com>
50 lines
1.2 KiB
Rust
50 lines
1.2 KiB
Rust
use bevy::prelude::*;
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/// This example creates a new event, a system that triggers the event once per second,
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/// and a system that prints a message whenever the event is received.
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fn main() {
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App::new()
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.add_plugins(DefaultPlugins)
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.add_event::<MyEvent>()
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.init_resource::<EventTriggerState>()
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.add_system(event_trigger_system.system())
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.add_system(event_listener_system.system())
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.run();
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}
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struct MyEvent {
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pub message: String,
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}
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struct EventTriggerState {
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event_timer: Timer,
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}
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impl Default for EventTriggerState {
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fn default() -> Self {
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EventTriggerState {
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event_timer: Timer::from_seconds(1.0, true),
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}
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}
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}
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// sends MyEvent every second
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fn event_trigger_system(
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time: Res<Time>,
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mut state: ResMut<EventTriggerState>,
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mut my_events: EventWriter<MyEvent>,
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) {
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if state.event_timer.tick(time.delta()).finished() {
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my_events.send(MyEvent {
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message: "MyEvent just happened!".to_string(),
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});
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}
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}
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// prints events as they come in
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fn event_listener_system(mut events: EventReader<MyEvent>) {
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for my_event in events.iter() {
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info!("{}", my_event.message);
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}
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}
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