Sensor class

The interface of the Sensor APIs is the base class for all the other sensor interfaces. This interface cannot be used directly. Instead it provides properties, event handlers, and methods accessed by interfaces that inherit from it. If a feature policy blocks use of a feature it is because your code is inconsistent with the policies set on your server. This is not something that would ever be shown to a user. The Feature-Policy HTTP header article contains implementation instructions.

EventTarget

Sensor

When initially created, the object is idle, meaning it does not take measures. Once the start()} method is called, it prepares itself to read data and, once ready, the activate event is sent and the sensor becomes activated. It then sends a reading event each time new data is available. In case of an error, the error event is sent, reading stops, and the object becomes idle again. The start()} method needs to be called again before it can read further data.

Implemented types

• EventTarget

Implementers

• Accelerometer
• AmbientLightSensor
• GeolocationSensor
• Gyroscope
• Magnetometer
• OrientationSensor
• ProximitySensor
• UncalibratedMagnetometer

Available extensions

• PropsEventTarget
• PropsSensor

Annotations

• @JS()
• @staticInterop

Constructors

Sensor()

factory

Properties

activated → bool

Available on Sensor, provided by the PropsSensor extension

no setter

hashCode → int

The hash code for this object.

no setter, inherited

hasReading → bool

Available on Sensor, provided by the PropsSensor extension

no setter

onactivate ↔ EventHandlerNonNull<Event>?

Available on Sensor, provided by the PropsSensor extension

getter/setter pair

onerror ↔ EventHandlerNonNull<Event>?

Available on Sensor, provided by the PropsSensor extension

getter/setter pair

onreading ↔ EventHandlerNonNull<Event>?

Available on Sensor, provided by the PropsSensor extension

getter/setter pair

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

timestamp → double?

Available on Sensor, provided by the PropsSensor extension

no setter

Methods

addEventListener(String type, EventListener? callback, [dynamic options]) → void

Available on EventTarget, provided by the PropsEventTarget extension

dispatchEvent(Event event) → bool

Available on EventTarget, provided by the PropsEventTarget extension

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

removeEventListener(String type, EventListener? callback, [dynamic options]) → void

Available on EventTarget, provided by the PropsEventTarget extension

start() → void

Available on Sensor, provided by the PropsSensor extension

stop() → void

Available on Sensor, provided by the PropsSensor extension

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited