Struct Timeline 

pub struct Timeline { /* private fields */ }

A retained, allocation-free-at-sample timeline. Tracks target separate caller-owned elements.

Implementations

impl Timeline

pub fn at(&mut self, at: Duration, animation: Animation) -> usize

Adds an absolute-positioned track. Returns its stable index.

pub fn then(&mut self, animation: Animation) -> Result<usize, AnimationError>

Appends after the previously inserted track; an infinite predecessor is rejected.

pub fn label(&mut self, name: impl Into<String>) -> Result<(), AnimationError>

Records a label at the current finite sequence cursor.

pub fn at_label( &mut self, name: &str, offset: Duration, animation: Animation, ) -> Result<usize, AnimationError>

Adds an overlapping track relative to a previously recorded label.

pub fn restart(&mut self, now: Duration)

Starts this timeline’s clock at zero at an application timestamp.

pub fn pause(&mut self, now: Duration)

Pauses the whole timeline.

pub fn play(&mut self, now: Duration)

Resumes the whole timeline.

pub fn seek(&mut self, time: Duration, now: Duration)

Scrubs all tracks, including backward seeks.

pub fn set_speed( &mut self, speed: f64, now: Duration, ) -> Result<(), AnimationError>

Changes the whole timeline playback rate, including negative playback.

pub fn sample(&mut self, now: Duration, reduced_motion: bool) -> &[Frame]

Samples all tracks into a retained buffer. No allocation occurs here.

pub fn is_animating(&self) -> bool

Whether sampled tracks or future tracks require another frame.

Trait Implementations

impl Debug for Timeline

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

Formats the value using the given formatter.

impl Default for Timeline

fn default() -> Self

Returns the “default value” for a type.