Trait StylePropReader

pub trait StylePropReader {
    type State: Debug;
    type Type: Clone;

    // Required methods
    fn read(
        state: &mut Self::State,
        style: &Style,
        fallback: &Style,
        now: &Instant,
        request_transition: &mut bool,
    ) -> bool;
    fn get(state: &Self::State) -> Self::Type;
    fn new() -> Self::State;
}

Required Associated Types

type State: Debug

type Type: Clone

Required Methods

fn read( state: &mut Self::State, style: &Style, fallback: &Style, now: &Instant, request_transition: &mut bool, ) -> bool

Reads the property from the style. Returns true if the property changed.

fn get(state: &Self::State) -> Self::Type

fn new() -> Self::State

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<P: StyleProp> StylePropReader for Option<P>

type State = Option<<P as StyleProp>::Type>

type Type = Option<<P as StyleProp>::Type>

fn read( state: &mut Self::State, style: &Style, fallback: &Style, _now: &Instant, _transition: &mut bool, ) -> bool

fn get(state: &Self::State) -> Self::Type

fn new() -> Self::State

Implementors

impl<P: StyleProp> StylePropReader for P

type State = (<P as StyleProp>::Type, TransitionState<<P as StyleProp>::Type>)

type Type = <P as StyleProp>::Type