Struct PickingEventWriters

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

A helper system param for accessing the picking event writers.

Trait Implementations

impl SystemParam for PickingEventWriters<'_>

type State = FetchState

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

type Item<'w, 's> = PickingEventWriters<'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, system_meta: &mut SystemMeta, ) -> <PickingEventWriters<'_> as SystemParam>::State

Registers any World access used by this SystemParam and creates a new instance of this param’s State.

unsafe fn new_archetype( state: &mut <PickingEventWriters<'_> as SystemParam>::State, archetype: &Archetype, system_meta: &mut SystemMeta, )

For the specified Archetype, registers the components accessed by this SystemParam (if applicable).a

fn apply( state: &mut <PickingEventWriters<'_> 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 apply_deferred.

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

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

unsafe fn validate_param<'w, 's>( state: &'s <PickingEventWriters<'_> as SystemParam>::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, ) -> bool

Validates that the param can be acquired by the get_param. Built-in executors use this to prevent systems with invalid params from running. For nested SystemParams validation will fail if any delegated validation fails.

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

Creates a parameter to be passed into a SystemParamFunction.

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

where EventWriter<'w, Pointer<Cancel>>: ReadOnlySystemParam, EventWriter<'w, Pointer<Click>>: ReadOnlySystemParam, EventWriter<'w, Pointer<Down>>: ReadOnlySystemParam, EventWriter<'w, Pointer<DragDrop>>: ReadOnlySystemParam, EventWriter<'w, Pointer<DragEnd>>: ReadOnlySystemParam, EventWriter<'w, Pointer<DragEnter>>: ReadOnlySystemParam, EventWriter<'w, Pointer<Drag>>: ReadOnlySystemParam, EventWriter<'w, Pointer<DragLeave>>: ReadOnlySystemParam, EventWriter<'w, Pointer<DragOver>>: ReadOnlySystemParam, EventWriter<'w, Pointer<DragStart>>: ReadOnlySystemParam, EventWriter<'w, Pointer<Move>>: ReadOnlySystemParam, EventWriter<'w, Pointer<Out>>: ReadOnlySystemParam, EventWriter<'w, Pointer<Over>>: ReadOnlySystemParam, EventWriter<'w, Pointer<Up>>: ReadOnlySystemParam,