Struct PointerId 

pub struct PointerId(/* private fields */);

A process-unique, monotonically increasing pointer identity.

Minted per press by PointerIdAllocator (see the module docs for why per press rather than per device). NonZeroU64 so Option<PointerId> is the same size as PointerId, and so id 0 can never be confused with “no pointer”.

Ordering is by mint order, which makes a BTreeMap<PointerId, _> iterate oldest contact first — the order a multi-touch consumer wants.

Implementations

impl PointerId

pub const MOUSE: Self

The one stable id every synthesized mouse event uses.

A mouse is singular: there is at most one of it, it never lifts, and nothing about it needs a per-press identity. Reserving id 1 for it keeps the legacy dispatch_event path allocation-free and makes “is this the mouse?” a comparison rather than a lookup.

pub const fn get(self) -> u64

The raw value, for a backend that must store the id compactly or hand it to a C API. Never construct a PointerId from one of these — only the allocator may mint.

Trait Implementations

impl Clone for PointerId

fn clone(&self) -> PointerId

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for PointerId

impl Debug for PointerId

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

Formats the value using the given formatter.

impl Eq for PointerId

impl Hash for PointerId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for PointerId

fn cmp(&self, other: &PointerId) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for PointerId

fn eq(&self, other: &PointerId) -> bool

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for PointerId

fn partial_cmp(&self, other: &PointerId) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for PointerId