Struct ArrivingRows 

pub struct ArrivingRows<K> { /* private fields */ }

The arrival timing of a widget’s pending rows, by row key.

The key is all that differs from one widget’s rows to another’s: it names a row’s slot in RowArrivals, which holds every row’s timing, fading and painting once, in the toolkit, for every list, table and tree of every app.

Implementations

impl<K> ArrivingRows<K>

where K: Clone + Eq + Hash,

pub fn new() -> ArrivingRows<K>

pub fn observe<T, E>( &mut self, key: &K, arrival: &Arrival<T, E>, motion: Option<EffectiveMotion>, now: Instant, ) -> Showing

What row key shows at now, its model answering arrival. A row first seen pending starts its timing now; a row that lands shows once its skeleton stood its minimum, fading in under motion (none when the widget has no theme yet: it shows at once).

pub fn face( &self, key: &K, shape: SkeletonShape, now: Instant, ) -> Option<ArrivalFace<'_>>

The placeholder row key paints at now in shape, while it shows one.

pub fn fade(&self, key: &K, now: Instant) -> Option<RowFade>

How row key fades in at now, while it does.

pub fn outgoing_face( &self, key: &K, shape: SkeletonShape, now: Instant, ) -> Option<(ArrivalFace<'_>, f32)>

The placeholder step a landed row’s content replaced, at the opacity it fades out with at now, while it does.

pub fn contains(&self, key: &K) -> bool

Whether row key is pending or fading in.

pub fn paint( &self, key: &K, shape: SkeletonShape, ctx: &mut PaintCtx<'_>, rect: Rect, now: Instant, content: &mut dyn FnMut(&mut PaintCtx<'_>), )

Paint what row key shows over its slot rect at now, with content drawing the row’s own widget: the placeholder, or the content fading in over the step it replaced, or just the content.

pub fn retain(&mut self, now: Instant, keep: impl FnMut(&K) -> bool)

Keep only the rows keep names, and of those only the ones still pending or fading in: a settled row needs no timing.

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

Whether a row is fading in at now.

pub fn next_wake_deadline(&self, now: Instant) -> Option<Instant>

The next instant after now at which a placeholder changes: its next step, or the content that landed showing once its skeleton stood its minimum.

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

Whether a row is waiting to show content that landed: the widget looks at its model again by now.

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

The widget drew what the rows show at now.

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

Whether what the rows show changed since the widget last drew them.

pub fn is_empty(&self) -> bool

Whether any row is pending or fading in.

Trait Implementations

impl<K> Clone for ArrivingRows<K>

where K: Clone,

fn clone(&self) -> ArrivingRows<K>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<K> Debug for ArrivingRows<K>

where K: Debug,

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

Formats the value using the given formatter.

impl<K> Default for ArrivingRows<K>

fn default() -> ArrivingRows<K>

Returns the “default value” for a type.