d9b8b3e618
This adds a `EventWriter<T>` `SystemParam` that is just a thin wrapper around `ResMut<Events<T>>`. This is primarily to have API symmetry between the reader and writer, and has the added benefit of easily improving the API later with no breaking changes.
23 lines
609 B
Rust
23 lines
609 B
Rust
use crate::{
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keyboard::{KeyCode, KeyboardInput},
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ElementState,
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};
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use bevy_app::{
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prelude::{EventReader, EventWriter},
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AppExit,
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};
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/// Sends the AppExit event whenever the "esc" key is pressed.
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pub fn exit_on_esc_system(
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mut keyboard_input_events: EventReader<KeyboardInput>,
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mut app_exit_events: EventWriter<AppExit>,
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) {
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for event in keyboard_input_events.iter() {
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if let Some(key_code) = event.key_code {
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if event.state == ElementState::Pressed && key_code == KeyCode::Escape {
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app_exit_events.send(AppExit);
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}
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}
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}
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}
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