Struct ItemsSourceViewOf 

pub struct ItemsSourceViewOf<T: PropertyValue> { /* private fields */ }

A typed ItemsSourceView: the items are read as T.

With T = BoxedValue the items are read untyped.

Implementations

impl<T: PropertyValue> ItemsSourceViewOf<T>

pub fn empty() -> Self

Gets an empty view.

pub fn new(source: ItemsSource) -> Self

Initializes a new instance of the view for the specified data source.

pub fn from_view(view: &ItemsSourceView) -> Self

Reads an existing view as a typed view over the same source.

pub fn view(&self) -> &Rc<ItemsSourceView>

The untyped view.

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

Retrieves the item at the specified index: None for a null item. Panics if the index is out of range or the item is not a T.

pub fn iter(&self) -> impl Iterator<Item = Option<T>> + '_

The items, enumerated by index over the live collection.

Methods from Deref<Target = ItemsSourceView>

pub fn count(&self) -> usize

Gets the number of items in the collection.

pub fn has_key_index_mapping(&self) -> bool

Gets a value that indicates whether the items source can provide a unique key for each item: whether the source implements IKeyIndexMapping (WinUI ItemsSourceView.HasKeyIndexMapping).

pub fn key_from_index(&self, index: i32) -> String

Retrieves the unique key of the item at index from the items source (WinUI ItemsSourceView.KeyFromIndex).

Panics if the source does not implement IKeyIndexMapping (WinUI throws hresult_not_implemented), or if index is not the index of an item.

pub fn index_from_key(&self, key: &str) -> i32

Retrieves the index of the item that has the unique key key, or -1 when no item has it (WinUI ItemsSourceView.IndexFromKey).

Panics if the source does not implement IKeyIndexMapping (WinUI throws hresult_not_implemented).

pub fn source(&self) -> ItemsSource

Gets the source collection.

pub fn add_collection_changed(&self, handler: Rc<ItemsChangedHandler>) -> u64

Occurs when the collection has changed to indicate the reason for the change and which items changed. Returns the token for remove_collection_changed.

pub fn remove_collection_changed(&self, token: u64)

pub fn get_at(&self, index: usize) -> Option<BoxedValue>

Retrieves the item at the specified index. Panics if out of range.

pub fn contains(&self, item: &Option<BoxedValue>) -> bool

Whether the collection contains the item.

pub fn index_of(&self, item: &Option<BoxedValue>) -> i32

The index of the item, or -1.

pub fn iter(&self) -> impl Iterator<Item = Option<BoxedValue>>

The items, enumerated by index over the live collection.

pub fn to_vec(&self) -> Vec<Option<BoxedValue>>

A copy of the items.

Trait Implementations

impl<T: PropertyValue> Clone for ItemsSourceViewOf<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: PropertyValue> Deref for ItemsSourceViewOf<T>

type Target = ItemsSourceView

The resulting type after dereferencing.

fn deref(&self) -> &ItemsSourceView

Dereferences the value.