An adapted view of the parent zone.

This class allows the implementation of a zone method to invoke methods onthe parent zone while retaining knowledge of the originating zone.

Custom zones (created throughZone.fork orrunZoned) can provideimplementations of most methods of zones. This is similar to overridingmethods onZone, except that this mechanism doesn't require subclassing.

A custom zone function (provided through aZoneSpecification) typicallyrecords or wraps its parameters and then delegates the operation to itsparent zone using the providedZoneDelegate.

While zones have access to their parent zone (throughZone.parent) it isrecommended to call the methods on the provided parent delegate for tworeasons:

1. the delegate methods take an additionalzone argument which is the zone the action has been initiated in.
2. delegate calls are more efficient, since the implementation knows howto skip zones that would just delegate to their parents.

Properties

hashCode→int

The hash code for this object.

no setterinherited

runtimeType→Type

A representation of the runtime type of the object.

no setterinherited

Methods

createPeriodicTimer(Zonezone,Durationperiod,voidf(Timertimer))→Timer

createTimer(Zonezone,Durationduration,voidf())→Timer

errorCallback(Zonezone,Objecterror,StackTrace?stackTrace)→AsyncError?

fork(Zonezone,ZoneSpecification?specification,Map?zoneValues)→Zone

handleUncaughtError(Zonezone,Objecterror,StackTracestackTrace)→ void

noSuchMethod(Invocationinvocation)→ dynamic

Invoked when a nonexistent method or property is accessed.

inherited

print(Zonezone,Stringline)→ void

registerBinaryCallback<R,T1,T2>(Zonezone,Rf(T1arg1,T2arg2))→ZoneBinaryCallback<R,T1,T2>

registerCallback<R>(Zonezone,Rf())→ZoneCallback<R>

registerUnaryCallback<R,T>(Zonezone,Rf(Targ))→ZoneUnaryCallback<R,T>

run<R>(Zonezone,Rf())→ R

runBinary<R,T1,T2>(Zonezone,Rf(T1arg1,T2arg2),T1arg1,T2arg2)→ R

runUnary<R,T>(Zonezone,Rf(Targ),Targ)→ R

scheduleMicrotask(Zonezone,voidf())→ void

toString()→String

A string representation of this object.

inherited

Operators

operator ==(Objectother)→bool

The equality operator.

inherited