Struct ClampingScrollSimulation 

pub struct ClampingScrollSimulation { /* private fields */ }

The rest of the animation layer: tweens chained and curved, the scroll simulations and their constants. A fling that decelerates like Android’s OverScroller, then stops dead.

The curve is the one Android’s SplineOverScroller uses for a fling: distance and duration are derived from the release velocity, and the position follows 1 − (1 − t)^r over that duration. It never leaves the content: reaching an edge is the caller’s business (see the clamping scroll policy), which is what makes it the right model for a platform with no bounce.

Adjusted, as Flutter’s is, to be ballistic — deceleration depends only on the current velocity, never on how long ago the motion started — so a fling can be restarted mid-flight from its own state alone.

Implementations

impl ClampingScrollSimulation

pub fn new( position: f32, velocity: f32, tolerance: Tolerance, ) -> ClampingScrollSimulation

A fling from position at velocity (px/s), with Android’s friction.

pub fn with_friction( position: f32, velocity: f32, friction: f32, tolerance: Tolerance, ) -> ClampingScrollSimulation

The same fling, with the friction coefficient made explicit: higher means it stops sooner and travels less far.

pub fn duration(&self) -> f32

The total run time, in seconds.

pub fn final_x(&self) -> f32

Where the fling comes to rest.

Trait Implementations

impl Clone for ClampingScrollSimulation

fn clone(&self) -> ClampingScrollSimulation

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ClampingScrollSimulation

impl Debug for ClampingScrollSimulation

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

Formats the value using the given formatter.

impl Simulation for ClampingScrollSimulation

fn x(&self, time: f32) -> f32

The position at instant time.

fn dx(&self, time: f32) -> f32

The velocity — the derivative of position — at instant time.

fn is_done(&self, time: f32) -> bool

true once the motion has finished, within the tolerances.

fn tolerance(&self) -> Tolerance

The stopping thresholds.