Enum DecelerationRate 

pub enum DecelerationRate {
    Normal,
    Fast,
}

How quickly a Bouncing surface’s fling decays — Flutter’s ScrollDecelerationRate.

Variants

Normal

iOS’s own rate: a long, low-friction glide with no constant deceleration term and the default edge spring.

Fast

A shorter, snappier glide: half the overscroll friction, a stiffer edge spring, and a constant deceleration on top of the drag curve.

Implementations

impl DecelerationRate

pub const NORMAL_FRICTION: f64 = 0.52

The overscroll friction factor at zero depth for DecelerationRate::Normal — the 0.52 in Flutter’s frictionFactor.

pub const FAST_FRICTION: f64 = 0.26

The same factor for DecelerationRate::Fast: half as much of a past-edge pull reaches the position.

pub const FAST_CONSTANT_DECELERATION: f64 = 1400.0

The constant deceleration (px/s²) DecelerationRate::Fast adds to its fling’s drag curve, which is what stops it early instead of letting it approach an asymptote. Normal adds none.

Trait Implementations

impl Clone for DecelerationRate

fn clone(&self) -> DecelerationRate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for DecelerationRate

impl Debug for DecelerationRate

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

Formats the value using the given formatter.

impl Default for DecelerationRate

fn default() -> DecelerationRate

Returns the “default value” for a type.

impl Eq for DecelerationRate

impl PartialEq for DecelerationRate

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for DecelerationRate