Struct Thumb 

pub struct Thumb { /* private fields */ }

A control’s moving part (a switch’s knob, a slider’s thumb) as a share of its travel, 0..=1: a click sends it on ControlChange::MOVE, a second click mid-flight retargets from where it is drawn, the hand holds it exactly where it is (Self::track), and let go it settles carrying the hand’s velocity.

Implementations

impl Thumb

pub fn at(position: f64) -> Thumb

Resting at position.

pub fn go( &mut self, to: f64, motion: EffectiveMotion, source: MotionSource, now: Instant, )

Go to to as source asked: a click or a finger moves it, a key or an action lands it.

pub fn track(&mut self, to: f64)

Held by the hand at to: drawn exactly there, from this frame.

pub fn release( &mut self, to: f64, velocity: f64, motion: EffectiveMotion, now: Instant, )

Let go, settling on to with the hand’s velocity.

pub fn snap(&mut self, to: f64)

Rest at to at once.

pub fn get(&self, now: Instant) -> f64

Where it is drawn at now, never past either end of its travel.

pub fn target(&self) -> f64

Where it is going (or is, at rest).

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

pub fn settles_at(&self) -> Option<Instant>

Trait Implementations

impl Clone for Thumb

fn clone(&self) -> Thumb

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Thumb

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

Formats the value using the given formatter.

impl Default for Thumb

fn default() -> Thumb

Returns the “default value” for a type.

impl Copy for Thumb