Struct SceneListAdapter 

pub struct SceneListAdapter<T: 'static> { /* private fields */ }

Keeps a set of lightweight SceneItems in sync with a teksilo_data::ListModel<T> / ListDataSource<Item = T>.

Not a Widget — a plain handle you construct once (typically from a composing widget’s build() or app setup code) and keep alive for as long as the sync should run. See the module docs for the delegate contract, reconciliation policy, and borrow discipline.

Dropping

Dropping a SceneListAdapter drops its [ObserverHandle], which stops the adapter from reacting to further source changes. It deliberately does not remove the adapter’s items from the scene — running scene mutations from inside a Drop impl risks a re-entrant borrow of the shared RefCell<Scene> if the drop happens while some other code already holds a borrow (e.g. mid-notification). Call clear first if you want the items gone before dropping.

Implementations

impl<T: 'static> SceneListAdapter<T>

pub fn from_model( model: &ListModel<T>, scene: SceneModel, delegate: impl Fn(&T, usize) -> Box<dyn SceneItem> + 'static, ) -> Self

Track model’s rows as scene items in scene, built by delegate.

Materialises every current row immediately (as if a DataChange::Reset had just fired), then keeps the scene in sync via ListModel::observe_changes for as long as the returned adapter is alive. See the module docs for the delegate contract and reconciliation policy.

pub fn from_source<S: ListDataSource<Item = T> + 'static>( source: Rc<S>, scene: SceneModel, delegate: impl Fn(&T, usize) -> Box<dyn SceneItem> + 'static, ) -> Self

Track an external ListDataSource’s rows as scene items in scene, built by delegate.

Takes source as an Rc<S> (rather than by value) so the caller can keep its own handle to the same source alongside the adapter — the same convention as ListView::from_source / TableView’s erasure. See Self::from_model for the materialisation + reconciliation behaviour, which is identical for both constructors.

pub fn item_id_at(&self, index: usize) -> Option<ItemId>

The scene item id materialised for data row index, or None if index is out of range or the row has no materialised item (an unloaded row of a windowed source).

pub fn ids(&self) -> Vec<ItemId>

All ids currently materialised by this adapter, in data order (rows with no materialised item are omitted, so this may be shorter than the source’s row count).

pub fn len(&self) -> usize

Number of scene items this adapter currently owns.

pub fn is_empty(&self) -> bool

Whether this adapter currently owns no scene items.

pub fn clear(&self)

Remove every scene item this adapter owns from the scene and forget them. The adapter keeps observing the source afterward — a later source change re-materialises rows as usual.