Struct ActionStateParam 

pub struct ActionStateParam<'w, 's, A>
where
    A: Actionlike + Clone,
{ /* private fields */ }

A system parameter that fetches the ActionState either from a resource or from a component. If both exist, the resource takes precedence.

Trait Implementations

impl<A> SystemParam for ActionStateParam<'_, '_, A>

where A: Actionlike + Clone,

type State = FetchState<A>

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

type Item<'w, 's> = ActionStateParam<'w, 's, A>

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) -> Self::State

Creates a new instance of this param’s State.

fn init_access( state: &Self::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 Self::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 Self::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 Self::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 Self::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, change_tick: Tick, ) -> Self::Item<'w, 's>

Creates a parameter to be passed into a SystemParamFunction.

impl<'w, 's, A> ReadOnlySystemParam for ActionStateParam<'w, 's, A>

where A: Actionlike + Clone, Option<Res<'w, ActionState<A>>>: ReadOnlySystemParam, Option<Single<'w, 's, &'static ActionState<A>>>: ReadOnlySystemParam,