Struct VecListModel 

pub struct VecListModel<T, K> { /* private fields */ }

Convenient fully-resident model. Database and paged sources generally implement ListModel directly instead.

Implementations

impl<T, K> VecListModel<T, K>

where K: Clone + Eq + Hash,

pub fn new( items: Vec<T>, key: impl FnMut(&T) -> K, ) -> Result<VecListModel<T, K>, DuplicateListKey>

Build the key index once.

Errors

Returns DuplicateListKey when two items resolve to the same key.

pub fn item(&self, index: usize) -> Option<&T>

pub fn items(&self) -> &[T]

pub fn push(&mut self, key: K, item: T) -> Result<(), DuplicateListKey>

Errors

Returns DuplicateListKey when key already exists.

pub fn remove(&mut self, index: usize) -> Option<T>

pub fn move_item(&mut self, from: usize, to: usize) -> bool

Trait Implementations

impl<T, K> ListModel for VecListModel<T, K>

where K: Clone + Eq + Hash + 'static,

type Key = K

fn len(&self) -> usize

fn key_at(&self, index: usize) -> Option<<VecListModel<T, K> as ListModel>::Key>

fn index_of( &self, key: &<VecListModel<T, K> as ListModel>::Key, ) -> Option<usize>

fn is_empty(&self) -> bool

fn row_state(&self, _index: usize) -> ListRowState<'_>

Current state of a logical row. Paged models can keep stable keys and geometry while their data moves through loading, ready, and error.

fn request_range(&mut self, _range: Range<usize>)

Opportunity to enqueue work for the visible window plus overscan.

fn poll_changed(&mut self) -> bool

Drain a model-owned invalidation wakeup. Return true after logical order, count, key, or row-state changes. Use VirtualList::invalidate_rows as well when ready delegate content changed without changing state.

fn poll_changes(&mut self) -> Vec<ListModelChange<Self::Key>>

Drain specific model changes. Prefer this to Self::poll_changed when an asynchronous source can identify its batch: stable delegates then survive structural changes and only named content rows rebuild.

fn needs_poll(&self) -> bool

Keep scheduling frames while Self::poll_changed or Self::poll_changes may observe an in-flight asynchronous source.