Struct ScrollVelocityTracker 

pub struct ScrollVelocityTracker { /* private fields */ }

A bounded, time-weighted velocity estimator for pointer samples.

Implementations

impl ScrollVelocityTracker

pub fn new(now: Instant, sample_window: Duration, idle_cutoff: Duration) -> Self

Creates a tracker with the supplied history and idle durations.

pub fn push_delta(&mut self, now: Instant, dx: f32, dy: f32)

Adds a displacement sample, accumulating samples with equal timestamps.

pub fn resolve(&mut self, now: Instant) -> Option<ScrollVelocity>

Returns the weighted velocity at now, if recent samples exist.

pub fn is_idle(&self, now: Instant) -> bool

Returns whether no sample arrived within the idle cutoff.

Trait Implementations

impl Clone for ScrollVelocityTracker

fn clone(&self) -> ScrollVelocityTracker

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ScrollVelocityTracker

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

Formats the value using the given formatter.

impl PartialEq for ScrollVelocityTracker

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ScrollVelocityTracker