Struct PickingMessageWriters 

pub struct PickingMessageWriters<'w> { /* private fields */ }

A helper system param for accessing the picking event writers.

Trait Implementations

impl SystemParam for PickingMessageWriters<'_>

type State = FetchState

Used to store data which persists across invocations of a system.

type Item<'w, 's> = PickingMessageWriters<'w>

The item type returned when constructing this system param. The value of this associated type should be Self, instantiated with new lifetimes.

fn init_state( world: &mut World, ) -> <PickingMessageWriters<'_> as SystemParam>::State

Creates a new instance of this param’s State.

fn init_access( state: &<PickingMessageWriters<'_> as SystemParam>::State, system_meta: &mut SystemMeta, component_access_set: &mut FilteredAccessSet, world: &mut World, )

Registers any World access used by this SystemParam

fn apply( state: &mut <PickingMessageWriters<'_> as SystemParam>::State, system_meta: &SystemMeta, world: &mut World, )

Applies any deferred mutations stored in this SystemParam’s state. This is used to apply Commands during ApplyDeferred.

fn queue( state: &mut <PickingMessageWriters<'_> as SystemParam>::State, system_meta: &SystemMeta, world: DeferredWorld<'_>, )

Queues any deferred mutations to be applied at the next ApplyDeferred.

unsafe fn validate_param<'w, 's>( state: &'s mut <PickingMessageWriters<'_> as SystemParam>::State, _system_meta: &SystemMeta, _world: UnsafeWorldCell<'w>, ) -> Result<(), SystemParamValidationError>

Validates that the param can be acquired by the get_param.

unsafe fn get_param<'w, 's>( state: &'s mut <PickingMessageWriters<'_> as SystemParam>::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, change_tick: Tick, ) -> <PickingMessageWriters<'_> as SystemParam>::Item<'w, 's>

Creates a parameter to be passed into a SystemParamFunction.

impl<'w, 's> ReadOnlySystemParam for PickingMessageWriters<'w>

where MessageWriter<'w, Pointer<Cancel>>: ReadOnlySystemParam, MessageWriter<'w, Pointer<Click>>: ReadOnlySystemParam, MessageWriter<'w, Pointer<Press>>: ReadOnlySystemParam, MessageWriter<'w, Pointer<DragDrop>>: ReadOnlySystemParam, MessageWriter<'w, Pointer<DragEnd>>: ReadOnlySystemParam, MessageWriter<'w, Pointer<DragEnter>>: ReadOnlySystemParam, MessageWriter<'w, Pointer<Drag>>: ReadOnlySystemParam, MessageWriter<'w, Pointer<DragLeave>>: ReadOnlySystemParam, MessageWriter<'w, Pointer<DragOver>>: ReadOnlySystemParam, MessageWriter<'w, Pointer<DragStart>>: ReadOnlySystemParam, MessageWriter<'w, Pointer<Scroll>>: ReadOnlySystemParam, MessageWriter<'w, Pointer<Move>>: ReadOnlySystemParam, MessageWriter<'w, Pointer<Out>>: ReadOnlySystemParam, MessageWriter<'w, Pointer<Over>>: ReadOnlySystemParam, MessageWriter<'w, Pointer<Release>>: ReadOnlySystemParam,