Struct ScrollGlide 

pub struct ScrollGlide { /* private fields */ }

The glide of a scroll view that pans both ways (a document, a canvas, a wide table): one ScrollMomentum per axis, so it decays as every list glides (glide_step) and steps in whole device pixels, which a host that copies what a scroll keeps on screen copies.

Implementations

impl ScrollGlide

pub fn new() -> ScrollGlide

pub fn fling(&mut self, vx: f64, vy: f64)

Glide on from a release velocity (logical pixels per second, in content space). A zero velocity stops it.

pub fn stop(&mut self)

pub fn stop_x(&mut self)

Stop the glide across, and along it is left as it is.

pub fn stop_y(&mut self)

Stop the glide up or down, and across it is left as it is.

pub fn set_device_scale(&mut self, device_per_unit: f64)

How many device pixels one logical pixel is on the display drawn to.

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

Advance to now (the frame’s time): the displacement since the last step, in whole device pixels per axis.

pub fn advance_by(&mut self, elapsed: Duration) -> (f64, f64)

Advance by elapsed, for a driver with its own frame clock.

pub fn velocity(&self) -> (f64, f64)

The glide’s velocity per axis, logical pixels per second.

pub fn is_active(&self) -> bool

Trait Implementations

impl Clone for ScrollGlide

fn clone(&self) -> ScrollGlide

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ScrollGlide

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

Formats the value using the given formatter.

impl Default for ScrollGlide

fn default() -> ScrollGlide

Returns the “default value” for a type.