Struct KeySelection 

pub struct KeySelection<K>
where
    K: Eq + Hash,
{ /* private fields */ }

Stable-key multi-selection for virtualized and mutable collections.

Explicit selections store selected keys. select_all switches to a complement representation and stores only later deselections, so selecting a collection with millions of non-resident rows remains constant-space.

Implementations

impl<K> KeySelection<K>

where K: Clone + Eq + Hash,

pub fn new() -> KeySelection<K>

pub fn is_selected(&self, key: &K) -> bool

pub fn is_select_all(&self) -> bool

pub fn len(&self, total: usize) -> usize

Number selected given the current number of selectable model keys.

pub fn is_empty(&self, total: usize) -> bool

pub fn anchor(&self) -> Option<&K>

pub fn primary(&self) -> Option<&K>

pub fn stored_keys(&self) -> impl Iterator<Item = &K>

The finite stored set: selected keys in explicit mode, deselected keys in select-all mode.

pub fn clear(&mut self)

pub fn select_only(&mut self, key: K)

pub fn toggle(&mut self, key: K)

pub fn select_range<I>(&mut self, target: K, keys: I, additive: bool)

where I: IntoIterator<Item = K>,

Apply an inclusive key range already resolved by the owning model. The stable anchor is preserved while the primary key moves to target.

pub fn select_all(&mut self)

pub fn reconcile<F>(&mut self, contains: F)

where F: FnMut(&K) -> bool,

Drop keys no longer present after a model change. In select-all mode only the finite exception set needs visiting.

Trait Implementations

impl<K> Clone for KeySelection<K>

where K: Clone + Eq + Hash,

fn clone(&self) -> KeySelection<K>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<K> Debug for KeySelection<K>

where K: Debug + Eq + Hash,

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<K> Default for KeySelection<K>

where K: Eq + Hash,

fn default() -> KeySelection<K>

Returns the “default value” for a type.

impl<K> PartialEq for KeySelection<K>

where K: PartialEq + Eq + Hash,

fn eq(&self, other: &KeySelection<K>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<K> Eq for KeySelection<K>

where K: Eq + Hash,

impl<K> StructuralPartialEq for KeySelection<K>

where K: Eq + Hash,