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ElementStream<T extends Event> class

A specialized Stream available to Elements to enable event delegation.

Implemented types

• Stream<T>

Constructors

ElementStream()

Properties

first → Future< T>

read-only, inherited

The first element of this stream.

hashCode → int

read-only, inherited

The hash code for this object.

isBroadcast → bool

read-only, inherited

Whether this stream is a broadcast stream.

isEmpty → Future< bool>

read-only, inherited

Whether this stream contains any elements.

last → Future< T>

read-only, inherited

The last element of this stream.

length → Future< int>

read-only, inherited

The number of elements in this stream.

runtimeType → Type

read-only, inherited

A representation of the runtime type of the object.

single → Future< T>

read-only, inherited

The single element of this stream.

Methods

any( bool test(T element)) → Future< bool>

inherited

Checks whether test accepts any element provided by this stream.

asBroadcastStream( {void onListen( StreamSubscription< T> subscription)?, void onCancel( StreamSubscription< T> subscription)?}) → Stream< T>

inherited

Returns a multi-subscription stream that produces the same events as this.

asyncExpand< E>( Stream< E>? convert(T event)) → Stream< E>

inherited

Transforms each element into a sequence of asynchronous events.

asyncMap< E>( FutureOr< E> convert(T event)) → Stream< E>

inherited

Creates a new stream with each data event of this stream asynchronously mapped to a new event.

capture( void onData(T event)) → StreamSubscription< T>

Adds a capturing subscription to this stream.

cast< R>( ) → Stream< R>

inherited

Adapt this stream to be a Stream<R>.

contains( Object? needle) → Future< bool>

inherited

Returns whether needle occurs in the elements provided by this stream.

distinct( [ bool equals(T previous, T next)?]) → Stream< T>

inherited

Skips data events if they are equal to the previous data event.

drain< E>( [E? futureValue]) → Future< E>

inherited

Discards all data on this stream, but signals when it is done or an error occurred.

elementAt( int index) → Future< T>

inherited

Returns the value of the indexth data event of this stream.

every( bool test(T element)) → Future< bool>

inherited

Checks whether test accepts all elements provided by this stream.

expand< S>( Iterable< S> convert(T element)) → Stream< S>

inherited

Transforms each element of this stream into a sequence of elements.

firstWhere( bool test(T element), {T orElse()?}) → Future< T>

inherited

Finds the first element of this stream matching test.

fold< S>( S initialValue, S combine(S previous, T element)) → Future< S>

inherited

Combines a sequence of values by repeatedly applying combine.

forEach( void action(T element)) → Future

inherited

Executes action on each element of this stream.

handleError( Function onError, { bool test(dynamic error)?}) → Stream< T>

inherited

Creates a wrapper Stream that intercepts some errors from this stream.

join( [ String separator = ""]) → Future< String>

inherited

Combines the string representation of elements into a single string.

lastWhere( bool test(T element), {T orElse()?}) → Future< T>

inherited

Finds the last element in this stream matching test.

listen( void onData(T event)?, { Function? onError, void onDone()?, bool? cancelOnError}) → StreamSubscription< T>

inherited

Adds a subscription to this stream.

map< S>( S convert(T event)) → Stream< S>

inherited

Transforms each element of this stream into a new stream event.

matches( String selector) → Stream< T>

Return a stream that only fires when the particular event fires for elements matching the specified CSS selector.

noSuchMethod( Invocation invocation) → dynamic

inherited

Invoked when a non-existent method or property is accessed.

pipe( StreamConsumer< T> streamConsumer) → Future

inherited

Pipes the events of this stream into streamConsumer.

reduce( T combine(T previous, T element)) → Future< T>

inherited

Combines a sequence of values by repeatedly applying combine.

singleWhere( bool test(T element), {T orElse()?}) → Future< T>

inherited

Finds the single element in this stream matching test.

skip( int count) → Stream< T>

inherited

Skips the first count data events from this stream.

skipWhile( bool test(T element)) → Stream< T>

inherited

Skip data events from this stream while they are matched by test.

take( int count) → Stream< T>

inherited

Provides at most the first count data events of this stream.

takeWhile( bool test(T element)) → Stream< T>

inherited

Forwards data events while test is successful.

timeout( Duration timeLimit, {void onTimeout( EventSink< T> sink)?}) → Stream< T>

inherited

Creates a new stream with the same events as this stream.

toList( ) → Future< List< T>>

inherited

Collects all elements of this stream in a List.

toSet( ) → Future< Set< T>>

inherited

Collects the data of this stream in a Set.

toString( ) → String

inherited

A string representation of this object.

transform< S>( StreamTransformer< T, S> streamTransformer) → Stream< S>

inherited

Applies streamTransformer to this stream.

where( bool test(T event)) → Stream< T>

inherited

Creates a new stream from this stream that discards some elements.

Operators

operator ==( Object other) → bool

inherited

The equality operator.