Struct Transient 

pub struct Transient;

Something shown for a while that then goes on its own: a volume readout, an acknowledgement, a player’s controls. A readout arrives at fast, a confirmation is there at once; both hold, then fade over base so they are gone exactly when they expire. Pure functions of two instants, so the owner keeps no motion state.

Implementations

impl Transient

pub const READOUT: MotionSpec

A readout that arrives (a volume level, a player’s controls).

pub const CONFIRMATION: MotionSpec

A confirmation, there the moment the action is done; also chrome the pointer wakes (a player’s controls).

pub fn exit_time(spec: MotionSpec, motion: EffectiveMotion) -> Duration

How long its exit fade takes.

pub fn enter_time(spec: MotionSpec, motion: EffectiveMotion) -> Duration

How long its arrival takes.

pub fn exit_starts( spec: MotionSpec, expires: Instant, motion: EffectiveMotion, ) -> Instant

When the exit fade starts, for something that expires at expires.

pub fn exit_progress( spec: MotionSpec, since: Instant, now: Instant, motion: EffectiveMotion, ) -> f64

How far through its exit fade something leaving at since is at now, 0..=1: the fade takes the motion’s own exit time.

pub fn opacity( spec: MotionSpec, _: (Instant, Instant), now: Instant, motion: EffectiveMotion, ) -> f32

Its opacity at now, shown since shown and gone at expires.

pub fn is_moving( spec: MotionSpec, _: (Instant, Instant), now: Instant, motion: EffectiveMotion, ) -> bool

Whether its opacity changes at now (arriving or fading), so its owner needs frames.