Struct kas::WidgetId

pub struct WidgetId(_);

Widget identifier

All widgets are assigned an identifier which is unique within the window. This type may be tested for equality and order.

This type is small and cheap to copy. Internally it is "NonZero", thus Option<WidgetId> is a free extension (requires no extra memory).

Identifiers are assigned when configured and when re-configured (via kas::TkAction::Reconfigure). Since user-code is not notified of a re-configure, user-code should not store a WidgetId.

Trait Implementations

impl Clone for WidgetId

fn clone(&self) -> WidgetId

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for WidgetId

impl Debug for WidgetId

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

Formats the value using the given formatter.

impl Default for WidgetId

fn default() -> Self

Returns the "default value" for a type.

impl Display for WidgetId

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

Formats the value using the given formatter.

impl Eq for WidgetId

impl From<WidgetId> for u32

fn from(id: WidgetId) -> u32

Performs the conversion.

impl From<WidgetId> for u64

fn from(id: WidgetId) -> u64

Performs the conversion.

impl Hash for WidgetId

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, 

Feeds a slice of this type into the given [Hasher].

impl Ord for WidgetId

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

This method returns an [Ordering] between self and other.

#[must_use]fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]fn clamp(self, min: Self, max: Self) -> Self

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

Restrict a value to a certain interval.

impl PartialEq<WidgetId> for WidgetId

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl PartialOrd<WidgetId> for WidgetId

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

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

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl StructuralEq for WidgetId

impl StructuralPartialEq for WidgetId

impl TryFrom<u32> for WidgetId

type Error = ()

The type returned in the event of a conversion error.

fn try_from(x: u32) -> Result<WidgetId, ()>

Performs the conversion.

impl TryFrom<u64> for WidgetId

type Error = ()

The type returned in the event of a conversion error.

fn try_from(x: u64) -> Result<WidgetId, ()>

Performs the conversion.