Struct SliverListView 

pub struct SliverListView<State: 'static> { /* private fields */ }

A lazy, keyed list of rows that size themselves. See the module docs.

Implementations

impl<State: 'static> SliverListView<State>

pub fn estimated_item_extent(self, estimate_px: f64) -> Self

Assume a row never laid out is estimate_px long along the scroll axis (48 px unless set) — what the scroll extent counts for every unmeasured row and what keyed anchoring shifts by per prepended row.

Panics

If estimate_px is not positive and finite.

pub fn on_near_start<F: Fn(&mut State) + 'static>( self, callback: F, threshold_px: f64, ) -> Self

Fire callback when the list’s start comes within threshold_px of the viewport’s leading edge — the “load older” edge. See the module docs’ Near edges and semantics.

pub fn on_near_end<F: Fn(&mut State) + 'static>( self, callback: F, threshold_px: f64, ) -> Self

Fire callback when the list’s end comes within threshold_px of the viewport’s trailing edge — the “load newer” edge, mirroring SliverListView::on_near_start.

Trait Implementations

impl<State: 'static> View<State> for SliverListView<State>

fn build(&self, _ctx: &mut BuildCtx<'_>) -> SliverListWidget

No layout has run yet, so there is no cache region to window against: nothing is materialised until the first rebuild after it.

type Element = SliverListWidget

The retained widget this view produces.

fn rebuild( &self, prev: &Self, element: &mut SliverListWidget, ctx: &mut BuildCtx<'_>, ) -> ChangeFlags

Reconcile prev (the previous view of the same type) against the live element, mutating it in place and reporting what changed.

fn teardown(&self, element: &mut SliverListWidget, ctx: &mut BuildCtx<'_>)

Tear down element when this view is being removed.

fn message(&self, _element: &mut Self::Element, _state: &mut State)

Deliver an event message to this view, mutating application state.