pub struct ViewTreeWatcherProxy { /* private fields */ }

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impl ViewTreeWatcherProxy

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pub fn new(channel: AsyncChannel) -> Self

Create a new Proxy for fuchsia.ui.observation.geometry/ViewTreeWatcher.

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pub fn take_event_stream(&self) -> ViewTreeWatcherEventStream

Get a Stream of events from the remote end of the protocol.

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Panics if the event stream was already taken.

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pub fn watch(&self) -> QueryResponseFut<WatchResponse>

A method of obtaining view tree snapshots for a particular view.

This call is formulated as a “hanging get” pattern: the client asks for a set of recent snapshots, and receives them via the callback. This pull-based approach ensures that clients consume events at their own pace; events don’t clog up the channel in an unbounded manner.

Error Handling. If Error is unset, the client may assume that the the response contains updates with complete information over its epoch.

Flow control. The caller is allowed at most one in-flight |Watch| call at a time; it is a logical error to have concurrent calls to |Watch|. Non-compliance results in channel closure.

Client pacing. The server will dispatch snapshots to the caller on a lossless, best-effort basis, but the caller must allocate enough time to keep up with new snapshots.

Trait Implementations§

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impl Clone for ViewTreeWatcherProxy

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fn clone(&self) -> ViewTreeWatcherProxy

Returns a copy 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 ViewTreeWatcherProxy

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

Formats the value using the given formatter. Read more
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impl Proxy for ViewTreeWatcherProxy

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type Protocol = ViewTreeWatcherMarker

The protocol which this Proxy controls.
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fn from_channel(inner: AsyncChannel) -> Self

Create a proxy over the given channel.
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fn into_channel(self) -> Result<AsyncChannel, Self>

Attempt to convert the proxy back into a channel. Read more
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fn as_channel(&self) -> &AsyncChannel

Get a reference to the proxy’s underlying channel. Read more
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fn into_client_end(self) -> Result<ClientEnd<Self::Protocol>, Self>

Attempt to convert the proxy back into a client end. Read more
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fn is_closed(&self) -> bool

Returns true if the proxy has received the PEER_CLOSED signal.
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fn on_closed(&self) -> OnSignals<'_, Unowned<'_, Handle>>

Returns a future that completes when the proxy receives the PEER_CLOSED signal.
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impl ViewTreeWatcherProxyInterface for ViewTreeWatcherProxy

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type WatchResponseFut = QueryResponseFut<WatchResponse>

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fn watch(&self) -> Self::WatchResponseFut

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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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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> Encode<Ambiguous1> for T

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unsafe fn encode( self, _encoder: &mut Encoder<'_>, _offset: usize, _depth: Depth ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more
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impl<T> Encode<Ambiguous2> for T

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unsafe fn encode( self, _encoder: &mut Encoder<'_>, _offset: usize, _depth: Depth ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. 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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fn in_current_span(self) -> Instrumented<Self>

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where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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

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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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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

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

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

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