Struct VelocityTracker 

pub struct VelocityTracker { /* private fields */ }

Recent (time_ms, position) samples for a drag’s release velocity: a delta-over-window estimate, not Flutter’s least-squares fit.

Implementations

impl VelocityTracker

pub fn new() -> Self

pub fn clear(&mut self)

Drop all samples; call on the Down that starts a gesture.

pub fn record(&mut self, time_ms: f64, position: f64)

Record a sample, pruning those older than the window.

pub fn velocity(&self) -> f64

Velocity in px/s across the window; 0.0 with under two samples or no span.

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

Trait Implementations

impl Clone for VelocityTracker

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VelocityTracker

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

Formats the value using the given formatter.

impl Default for VelocityTracker

fn default() -> Self

Returns the “default value” for a type.