Struct WindowId 

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

Unique identifier of an open window.

Can be obtained from WINDOW.id inside a window.

Name

IDs are only unique for the same process. You can associate a name with an ID to give it a persistent identifier.

Memory

The internal number is a NonZeroU32, that means that Option<WindowId> and WindowId are the same size as u32.

As Hash

The generated internal number has good statistical distribution and can be used as its own hash, although it is not cryptographically safe, as it is simply a sequential counter scrambled using a modified splitmix64.

Static

The unique ID cannot be generated at compile time, but you can use the static_id! macro to declare a lazy static that instantiates the ID.

Exhaustion Handling

If more IDs are generated them u32::MAX an error is logged, the internal counter is reset and ids are reused.

Implementations

impl WindowId

pub fn new_unique() -> Self

Generates a new unique ID.

pub fn get(self) -> u32

Retrieve the underlying value.

pub fn sequential(self) -> u32

Un-scramble the underlying value to get the original sequential count number.

If two IDs, id0 and id1 where generated by the same thread then id0.sequential() < id1.sequential().

pub fn from_raw(raw: u32) -> Self

Creates an ID from a raw value.

The value must not be zero, panics if it is, the value must have been provided by get otherwise the ID will not be unique.

pub fn from_sequential(num: u32) -> Self

Creates an ID from a sequential number.

Safety

The value must not be zero, panics if it is, the value must have been provided by sequential otherwise the ID will not be unique.

impl WindowId

pub fn named(name: impl Into<Txt>) -> Self

Get or generate an ID with associated name.

If the name is already associated with an ID, returns it. If the name is new, generates a new ID and associated it with the name. If name is an empty string just returns a new ID.

pub fn debug_named(name: impl Into<Txt>) -> Self

Calls named in a debug build and new_unique in a release build.

pub fn named_new(name: impl Into<Txt>) -> Result<Self, IdNameError<Self>>

Generate a new ID with associated name.

If the name is already associated with an ID, returns the NameUsed error. If the name is an empty string just returns a new ID.

pub fn name(self) -> Txt

Returns the name associated with the ID or "".

pub fn set_name(self, name: impl Into<Txt>) -> Result<(), IdNameError<Self>>

Associate a name with the ID, if it is not named.

If the name is already associated with a different ID, returns the NameUsed error. If the ID is already named, with a name different from name, returns the AlreadyNamed error. If the name is an empty string or already is the name of the ID, does nothing.

Trait Implementations

impl Clone for WindowId

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WindowId

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for WindowId

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for WindowId

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

Formats the value using the given formatter.

impl From<&'static str> for WindowId

fn from(name: &'static str) -> Self

Calls WindowId::named.

impl From<Cow<'static, str>> for WindowId

fn from(name: Cow<'static, str>) -> Self

Calls WindowId::named.

impl From<String> for WindowId

fn from(name: String) -> Self

Calls WindowId::named.

impl From<Txt> for WindowId

fn from(name: Txt) -> Self

Calls WindowId::named.

impl From<WindowId> for CommandScope

fn from(id: WindowId) -> Self

Converts to this type from the input type.

impl From<char> for WindowId

fn from(name: char) -> Self

Calls WindowId::named.

impl Hash for WindowId

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

where H: Hasher,

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 IntoVar<CommandScope> for WindowId

fn into_var(self) -> Var<CommandScope>

impl IntoVar<Option<WindowId>> for WindowId

fn into_var(self) -> Var<Option<WindowId>>

impl IntoVar<WindowId> for &'static str

fn into_var(self) -> Var<WindowId>

Calls WindowId::named.

impl IntoVar<WindowId> for Cow<'static, str>

fn into_var(self) -> Var<WindowId>

Calls WindowId::named.

impl IntoVar<WindowId> for String

fn into_var(self) -> Var<WindowId>

Calls WindowId::named.

impl IntoVar<WindowId> for Txt

fn into_var(self) -> Var<WindowId>

Calls WindowId::named.

impl IntoVar<WindowId> for char

fn into_var(self) -> Var<WindowId>

Calls WindowId::named.

impl PartialEq for WindowId

fn eq(&self, other: &Self) -> 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 Serialize for WindowId

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl UniqueId for WindowId

fn new_unique() -> Self

New unique ID.

impl Copy for WindowId

impl Eq for WindowId

impl IntoValue<CommandScope> for WindowId

impl IntoValue<Option<WindowId>> for WindowId

impl IntoValue<WindowId> for &'static str

impl IntoValue<WindowId> for Cow<'static, str>

impl IntoValue<WindowId> for String

impl IntoValue<WindowId> for Txt

impl IntoValue<WindowId> for char

impl NoUninit for WindowId

impl PodInOption for WindowId

impl ZeroableInOption for WindowId