Struct Callbacks 

pub struct Callbacks<A> { /* private fields */ }

An animation wrapper that emits events at milestones.

Wraps any Animation and queues AnimationEvents during tick(). Call drain_events to retrieve and clear them.

Implementations

impl<A: Animation> Callbacks<A>

pub fn new(inner: A) -> Self

Wrap an animation with callback tracking.

pub fn on_start(self) -> Self

Enable the Started event (builder pattern).

pub fn on_complete(self) -> Self

Enable the Completed event (builder pattern).

pub fn at_progress(self, threshold: f32) -> Self

Add a progress threshold event (builder pattern).

Fires when the animation’s value crosses threshold (clamped to [0.0, 1.0]).

pub fn inner(&self) -> &A

Access the inner animation.

pub fn inner_mut(&mut self) -> &mut A

Mutable access to the inner animation.

pub fn drain_events(&mut self) -> Vec<AnimationEvent>

Drain all pending events. Clears the event queue.

pub fn pending_event_count(&self) -> usize

Number of pending events.

Trait Implementations

impl<A: Animation> Animation for Callbacks<A>

fn tick(&mut self, dt: Duration)

Advance the animation by dt.

fn is_complete(&self) -> bool

Whether the animation has reached its end.

fn value(&self) -> f32

Current output value, clamped to [0.0, 1.0].

fn reset(&mut self)

Reset the animation to its initial state.

fn overshoot(&self) -> Duration

Time elapsed past completion. Used by composition types to forward remaining time (e.g., Sequence forwards overshoot from first to second). Returns Duration::ZERO for animations that never complete.

impl<A: Debug> Debug for Callbacks<A>

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

Formats the value using the given formatter.