Struct Cached

pub struct Cached<C: Ctx, E: UserEvent> {
    pub cached: Option<Value>,
    pub node: Node<C, E>,
}

Fields

cached: Option<Value>

node: Node<C, E>

Implementations

impl<C: Ctx, E: UserEvent> Cached<C, E>

pub fn new(node: Node<C, E>) -> Self

pub fn update(&mut self, ctx: &mut ExecCtx<C, E>, event: &mut Event<E>) -> bool

update the node, return whether the node updated. If it did, the updated value will be stored in the cached field, if not, the previous value will remain there.

pub fn update_changed( &mut self, ctx: &mut ExecCtx<C, E>, event: &mut Event<E>, ) -> bool

update the node, return true if the node updated AND the new value is different from the old value. The cached field will only be updated if the value changed.

Trait Implementations

impl<C: Debug + Ctx, E: Debug + UserEvent> Debug for Cached<C, E>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<C: Ctx, E: UserEvent> Default for Cached<C, E>

fn default() -> Self

Returns the “default value” for a type.