CustomLocationDataSource class final

A LocationDataSource that can be driven by a user-defined provider of location data (LocationProvider). This can be useful if you have location data coming from a custom source that you would like to use in the form of a LocationDataSource so it can interface with other parts of the API.

Each time the datasource is started, it will ask for a LocationProvider by calling the function provided in the constructor. The function must return a LocationProvider instance that is fully initialized and generating locations and headings.

When stopped, the datasource cancels its subscriptions to the LocationProvider.locations and LocationProvider.headings streams and releases its reference to the provider.

Inheritance

Constructors

CustomLocationDataSource(FutureOr<LocationProvider> generateLocationProvider())
Constructs a CustomLocationDataSource. The generateLocationProvider parameter is a function that is called when the datasource is started and returns a LocationProvider.
factory

Properties

currentProvider → LocationProvider?
The LocationProvider currently being used by the datasource. Will be null if the datasource is not started.
no setter
error → ArcGISException?
An error that describes a problem encountered while starting or running the LocationDataSource.
no setterinherited
exception → Exception?
no setterinherited
hashCode → int
The hash code for this object.
no setterinherited
onErrorChanged → Stream<ArcGISException?>
Indicates that the LocationDataSource.error property has changed.
no setterinherited
onExceptionChanged → Stream<Exception?>
no setterinherited
onHeadingChanged → Stream<double>
Set the heading changed callback function for the location data source.
no setterinherited
onLocationChanged → Stream<ArcGISLocation>
Set the location changed callback function for the location data source.
no setterinherited
onStatusChanged → Stream<LocationDataSourceStatus>
Set the status changed callback function for the location data source.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
status → LocationDataSourceStatus
The current status of the location data source.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
start() → Future<void>
Starts the location data source asynchronously and prepares to begin receiving location updates.
inherited
stop() → Future<void>
Stops the location data source asynchronously.
inherited
toString() → String
A string representation of this object.
inherited
updateHeading(double heading) → void
Updates the current heading angle, in degrees clockwise, relative to north.
inherited
updateLocation(ArcGISLocation location) → void
Updates the position of the current location.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited