Struct BarFade 

pub struct BarFade { /* private fields */ }

The idle fade of an overlay scroll bar: fully visible for a moment after scrolling, then fading out, unless something holds it (the pointer near the bar, a drag, keyboard focus, reduced motion, an always-visible bar). One timer for Scrollable and painted super::ScrollRegions, so every bar in the system appears and fades alike.

Implementations

impl BarFade

pub fn wake(&mut self, now: Instant)

Scrolling (or anything that should show the bar) happened at now.

pub fn is_idle(&self) -> bool

Whether the bar has never been woken.

pub fn opacity_at(&self, now: Instant, held: bool) -> f32

The bar’s opacity at now; held keeps it fully visible.

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

Whether the bar is fading at now (the owner needs frames).

pub fn fade_deadline_at(&self, now: Instant, held: bool) -> Option<Instant>

When the fade starts, if it is still ahead at now: the owner’s next wake deadline.

Trait Implementations

impl Clone for BarFade

fn clone(&self) -> BarFade

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BarFade

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

Formats the value using the given formatter.

impl Default for BarFade

fn default() -> BarFade

Returns the “default value” for a type.

impl PartialEq for BarFade

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for BarFade

impl Eq for BarFade

impl StructuralPartialEq for BarFade