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WidgetStates

frus

Struct WidgetStates 

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pub struct WidgetStates(/* private fields */);
Expand description

The set of states a widget is in, as a byte rather than a hash set.

The reference passes a Set<WidgetState>. Eight states fit in eight bits, and a Copy set with no allocation is what a paint walk that runs every frame wants — it also means the set can take part in the rebuild hash, which a HashSet could not do cheaply.

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impl WidgetStates

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pub const EMPTY: WidgetStates

In no state at all: at rest, reachable, valid, unselected.

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pub const fn of(state: WidgetState) -> WidgetStates

The set holding state alone.

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pub const fn with(self, state: WidgetState) -> WidgetStates

This set, plus state.

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pub const fn without(self, state: WidgetState) -> WidgetStates

This set, less state.

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pub const fn set(self, state: WidgetState, on: bool) -> WidgetStates

This set, with state present or not according to on — the shape a widget answering for its own selection wants.

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pub const fn contains(self, state: WidgetState) -> bool

Is the widget in this state?

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pub const fn is_empty(self) -> bool

Is it in none at all?

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impl BitOr<WidgetState> for WidgetStates

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type Output = WidgetStates

The resulting type after applying the | operator.
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fn bitor(self, state: WidgetState) -> WidgetStates

Performs the | operation. Read more
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impl Clone for WidgetStates

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fn clone(&self) -> WidgetStates

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Copy for WidgetStates

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impl Debug for WidgetStates

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

Formats the value using the given formatter. Read more
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impl Default for WidgetStates

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fn default() -> WidgetStates

Returns the “default value” for a type. Read more
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impl Eq for WidgetStates

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impl From<WidgetState> for WidgetStates

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fn from(state: WidgetState) -> WidgetStates

Converts to this type from the input type.
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impl Hash for WidgetStates

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

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

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

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for WidgetStates

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

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more
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impl StructuralPartialEq for WidgetStates

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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where T: ?Sized,

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impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> Downcast for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn Any>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
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impl<T> Downcast<T> for T

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fn downcast(&self) -> &T

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

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

Compare self to key and return true if they are equal.
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Returns the argument unchanged.

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Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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where T: Send,

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where T: Default,

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type NoneType = T

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fn null_value() -> T

The none-equivalent value.
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The resulting type after obtaining ownership.
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The type returned in the event of a conversion error.
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Performs the conversion.
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Performs the conversion.
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fn upcast(&self) -> Option<&T>

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