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EventKind

xa11y

Enum EventKind 

pub enum EventKind {

Show 14 variants    FocusChanged,
    ValueChanged,
    NameChanged,
    StateChanged {
        flag: StateFlag,
        value: bool,
    },
    StructureChanged,
    WindowOpened,
    WindowClosed,
    WindowActivated,
    WindowDeactivated,
    SelectionChanged,
    MenuOpened,
    MenuClosed,
    TextChanged,
    Announcement,

}
Expand description

The kind of accessibility event, normalized across platforms.

Variants carry payload only when that data is guaranteed to be present on all supporting platforms. For everything else, re-query the target element after receipt.

Variants§

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FocusChanged

Keyboard focus moved to a new element. Target: the element that gained focus.

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ValueChanged

An element’s value changed (slider position, text field contents, checkbox state, spin button, progress, etc.). Target: the element whose value changed.

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NameChanged

An element’s name or label changed. Target: the element whose name changed.

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StateChanged

A boolean state flag changed on an element. Target: the element whose state changed.

flag and value are always populated — this variant is only emitted when both are known. Coverage varies by platform:

  • Linux: all state bits via Object:StateChanged.
  • Windows: IsEnabled, ToggleState, ExpandCollapseState, SelectionItem_IsSelected via PropertyChanged events.
  • macOS: Checked (via AXValueChanged on checkbox/radio) and Busy (via AXElementBusyChanged). Enabled is NOT deliverable via any public app-level macOS notification and will never fire on macOS.

Fields

§flag: StateFlag
§value: bool
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StructureChanged

Children were added to or removed from an element, or the tree structure was otherwise invalidated. Target: the parent element whose children changed, if known.

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WindowOpened

A new window was created. Target: the window element.

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WindowClosed

A window was closed or destroyed. Target: snapshot taken at destruction time; some attributes may be absent.

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WindowActivated

A window became the active/focused window. Target: the window element.

  • macOS: AXFocusedWindowChanged.
  • Linux: Window:Activate.
  • Windows: no first-class UIA event; inferred from focus changes.
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WindowDeactivated

A window lost active status. Target: the window element.

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SelectionChanged

The selection changed in a list, table, or other container. Target: the container element (not the selected items).

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MenuOpened

A menu became visible. Target: the menu element.

  • macOS: AXMenuOpened.
  • Windows: UIA_MenuOpenedEventId.
  • Linux: not reliably emitted; this event will not fire on Linux.
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MenuClosed

A menu was dismissed. Target: the menu element.

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TextChanged

Text content changed in an editable element. Target: the text element (re-query its value for current contents).

No payload: macOS AXValueChanged carries no delta, so change_type and position cannot be populated cross-platform.

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Announcement

An accessibility announcement was posted (live region update, alert, or explicit announcement request). Target: the element that made the announcement, if available.

No text payload: Windows UIA_LiveRegionChangedEventId carries no text, so the announcement text cannot be populated cross-platform. Consumers should re-query a nearby alert or live region element for the content.

  • macOS: AXAnnouncementRequested.
  • Linux: Object:Announcement.
  • Windows: UIA_NotificationEventId and UIA_LiveRegionChangedEventId.

Trait Implementations§

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impl Clone for EventKind

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fn clone(&self) -> EventKind

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for EventKind

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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<'de> Deserialize<'de> for EventKind

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fn deserialize<__D>( __deserializer: __D, ) -> Result<EventKind, <__D as Deserializer<'de>>::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl PartialEq for EventKind

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

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fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl StructuralPartialEq for EventKind

Auto Trait Implementations§

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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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where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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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> Conv for T

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fn conv<T>(self) -> T
where Self: Into<T>,

Converts self into T using Into<T>. Read more
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impl<T> FmtForward for T

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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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where U: From<T>,

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Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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where F: FnOnce(&Self) -> bool,

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fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R
where Self: Sized,

Pipes by value. This is generally the method you want to use. Read more
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where R: 'a,

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where R: 'a,

Mutably borrows self and passes that borrow into the pipe function. Read more
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where Self: Borrow<B>, B: 'a + ?Sized, R: 'a,

Borrows self, then passes self.borrow() into the pipe function. Read more
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where Self: BorrowMut<B>, B: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more
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fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R
where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

Borrows self, then passes self.as_ref() into the pipe function.
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fn pipe_as_mut<'a, U, R>(&'a mut self, func: impl FnOnce(&'a mut U) -> R) -> R
where Self: AsMut<U>, U: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.as_mut() into the pipe function.
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where Self: Deref<Target = T>, T: 'a + ?Sized, R: 'a,

Borrows self, then passes self.deref() into the pipe function.
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where Self: DerefMut<Target = T> + Deref, T: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.deref_mut() into the pipe function.
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impl<T> Pointable for T

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const ALIGN: usize

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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Dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

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fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more
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fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self

Mutable access to a value. Read more
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fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

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where Self: BorrowMut<B>, B: ?Sized,

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where Self: AsMut<R>, R: ?Sized,

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where Self: Deref<Target = T>, T: ?Sized,

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fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self

Calls .tap() only in debug builds, and is erased in release builds.
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where Self: Borrow<B>, B: ?Sized,

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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

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where Self: AsRef<R>, R: ?Sized,

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where Self: AsMut<R>, R: ?Sized,

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where Self: Deref<Target = T>, T: ?Sized,

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where Self: DerefMut<Target = T> + Deref, T: ?Sized,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

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