Struct bevy::ecs::removal_detection::RemovedComponentReader
pub struct RemovedComponentReader<T>where
T: Component,{ /* private fields */ }
Expand description
Wrapper around a ManualEventReader<RemovedComponentEntity>
so that we
can differentiate events between components.
Methods from Deref<Target = ManualEventReader<RemovedComponentEntity>>§
pub fn read<'a>(&'a mut self, events: &'a Events<E>) -> EventIterator<'a, E> ⓘ
pub fn read<'a>(&'a mut self, events: &'a Events<E>) -> EventIterator<'a, E> ⓘ
Examples found in repository?
examples/ecs/send_and_receive_events.rs (line 153)
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fn send_and_receive_manual_event_reader(
// The `Local` `SystemParam` stores state inside the system itself, rather than in the world.
// `ManualEventReader<T>` is the internal state of `EventReader<T>`, which tracks which events have been seen.
mut local_event_reader: Local<ManualEventReader<DebugEvent>>,
// We can access the `Events` resource mutably, allowing us to both read and write its contents.
mut events: ResMut<Events<DebugEvent>>,
frame_count: Res<FrameCount>,
) {
println!(
"Sending and receiving events for frame {} with a `Local<ManualEventReader>",
frame_count.0
);
// We must collect the events to resend, because we can't mutate events while we're iterating over the events.
let mut events_to_resend = Vec::new();
for event in local_event_reader.read(&events) {
if event.resend_from_local_event_reader {
// For simplicity, we're cloning the event.
// In this case, since we have mutable access to the `Events` resource,
// we could also just mutate the event in-place,
// or drain the event queue into our `events_to_resend` vector.
events_to_resend.push(event.clone());
}
}
for mut event in events_to_resend {
event.times_sent += 1;
events.send(event);
}
}
pub fn read_with_id<'a>(
&'a mut self,
events: &'a Events<E>
) -> EventIteratorWithId<'a, E> ⓘ
pub fn read_with_id<'a>( &'a mut self, events: &'a Events<E> ) -> EventIteratorWithId<'a, E> ⓘ
pub fn len(&self, events: &Events<E>) -> usize
pub fn len(&self, events: &Events<E>) -> usize
See EventReader::len
pub fn missed_events(&self, events: &Events<E>) -> usize
pub fn missed_events(&self, events: &Events<E>) -> usize
Amount of events we missed.
Trait Implementations§
§impl<T> Debug for RemovedComponentReader<T>
impl<T> Debug for RemovedComponentReader<T>
§impl<T> Default for RemovedComponentReader<T>where
T: Component,
impl<T> Default for RemovedComponentReader<T>where
T: Component,
§fn default() -> RemovedComponentReader<T>
fn default() -> RemovedComponentReader<T>
Returns the “default value” for a type. Read more
§impl<T> Deref for RemovedComponentReader<T>where
T: Component,
impl<T> Deref for RemovedComponentReader<T>where
T: Component,
§type Target = ManualEventReader<RemovedComponentEntity>
type Target = ManualEventReader<RemovedComponentEntity>
The resulting type after dereferencing.
§fn deref(&self) -> &<RemovedComponentReader<T> as Deref>::Target
fn deref(&self) -> &<RemovedComponentReader<T> as Deref>::Target
Dereferences the value.
§impl<T> DerefMut for RemovedComponentReader<T>where
T: Component,
impl<T> DerefMut for RemovedComponentReader<T>where
T: Component,
§fn deref_mut(&mut self) -> &mut <RemovedComponentReader<T> as Deref>::Target
fn deref_mut(&mut self) -> &mut <RemovedComponentReader<T> as Deref>::Target
Mutably dereferences the value.
Auto Trait Implementations§
impl<T> RefUnwindSafe for RemovedComponentReader<T>where
T: RefUnwindSafe,
impl<T> Send for RemovedComponentReader<T>
impl<T> Sync for RemovedComponentReader<T>
impl<T> Unpin for RemovedComponentReader<T>where
T: Unpin,
impl<T> UnwindSafe for RemovedComponentReader<T>where
T: UnwindSafe,
Blanket Implementations§
§impl<T, U> AsBindGroupShaderType<U> for T
impl<T, U> AsBindGroupShaderType<U> for T
§fn as_bind_group_shader_type(&self, _images: &RenderAssets<Image>) -> U
fn as_bind_group_shader_type(&self, _images: &RenderAssets<Image>) -> U
Return the
T
ShaderType
for self
. When used in AsBindGroup
derives, it is safe to assume that all images in self
exist.source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere
T: Any,
§fn into_any(self: Box<T>) -> Box<dyn Any>
fn into_any(self: Box<T>) -> Box<dyn Any>
Convert
Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
.§fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
Convert
Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
.§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
Convert
&Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s.§fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Convert
&mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s.§impl<T> DowncastSync for T
impl<T> DowncastSync for T
§impl<S> FromSample<S> for S
impl<S> FromSample<S> for S
fn from_sample_(s: S) -> S
§impl<T> FromWorld for Twhere
T: Default,
impl<T> FromWorld for Twhere
T: Default,
§fn from_world(_world: &mut World) -> T
fn from_world(_world: &mut World) -> T
Creates
Self
using data from the given World
.