Enum Class 

pub enum Class {
    Spatial,
    Scale,
    Opacity,
    Color,
    Gesture,
    Other,
}

The kind of a moving value. It sets how close counts as settled and what reduced motion does. Effect classes (opacity, colour) never overshoot: their samples stay between the start and the target.

Variants

Spatial

Positions and sizes in points.

Scale

A scale factor around 1.

Opacity

An alpha 0..=1. An effect: never overshoots.

Color

Colour lanes (OKLab). An effect: never overshoots.

Gesture

A value under the user’s hand (a drag or fling): reduced motion leaves it alone.

Other

Anything else (a progress number…).

Implementations

impl Class

pub fn eps(self, pixels_per_point: f32) -> Eps

Settle thresholds for this class on a display with pixels_per_point (NaN is 1, clamped to 0.25..=16). Spatial and gesture values settle within a quarter of a physical pixel.

pub const fn is_effect(self) -> bool

Whether this class is an effect (opacity, colour) that must not overshoot.

pub const fn reduce(self, curve: Curve) -> Curve

The curve to use instead of curve under reduced motion: spatial, scale and other values jump; opacity and colour take a short fade (crate::tokens::REDUCED_FADE); a gesture keeps its curve (the user’s own hand is never slowed or removed).

Trait Implementations

impl Clone for Class

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Class

impl Debug for Class

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

Formats the value using the given formatter.

impl Default for Class

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Class

impl Hash for Class

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Class

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Class