Struct KeySetSelection 

pub struct KeySetSelection<'a, K>
where
    K: Eq + Hash + Copy,
{ /* private fields */ }

Index-based selection storage backed by a key slice + HashSet of selected keys.

This is convenient when your application stores selection as a set of arbitrary keys (e.g. HashSet<u32> or HashSet<MyId>), but you still want to drive a multi-select scope using contiguous indices.

Implementations

impl<'a, K> KeySetSelection<'a, K>

where K: Eq + Hash + Copy,

pub fn new(keys: &'a [K], selected: &'a mut HashSet<K>) -> Self

Create a new index-based view over a key slice and a selection set.

• keys: stable index->key mapping (e.g. your backing array).
• selected: set of currently selected keys.

Trait Implementations

impl<'a, K> MultiSelectIndexStorage for KeySetSelection<'a, K>

where K: Eq + Hash + Copy,

fn len(&self) -> usize

Total number of items in the selection scope.

fn is_selected(&self, index: usize) -> bool

Returns whether item at index is currently selected.

fn set_selected(&mut self, index: usize, selected: bool)

Updates selection state for item at index.

fn selected_count_hint(&self) -> Option<usize>

Optional hint for current selection size.

fn is_empty(&self) -> bool

Returns true if the selection scope is empty.