SimulatedLocationDataSource Class

Member Function Documentation

[explicit] SimulatedLocationDataSource::SimulatedLocationDataSource(QObject *parent)

Creates a simulated location data source with an optional parent.

[override virtual] SimulatedLocationDataSource::~SimulatedLocationDataSource()

Destructor.

int SimulatedLocationDataSource::currentLocationIndex() const

The index of the item in the location collection that provides the current location

You can get this value to find which item in the SimulatedLocationDataSource::locations collection represents the current location. You can also provide a new index to skip to a different location in the collection.

See also setCurrentLocationIndex().

double SimulatedLocationDataSource::iterationRate() const

Returns the rate over which the SimulatedLocationDataSource::locations collection is iterated.

This controls the frequency of location updates for the simulated location data source. The default value is 1.0, resulting in calls to AbstractLocationDataSource::updateLocation(const Esri::ArcGISRuntime::Location&) every second. To increase the frequency, provide a higher value. A value of 2.0, for example, doubles the frequency of location updates. To slow down updates, provide a lower value. A value of 0.5, for example, decreases location updates by a factor of two. The iteration rate does not affect the Location::timestamp property of the items in the locations (they are always 1 second apart).

See also setIterationRate().

QList<Esri::ArcGISRuntime::Location> SimulatedLocationDataSource::locations() const

Returns a list of location objects.

As the collection is iterated, the AbstractLocationDataSource::updateLocation(const Esri::ArcGISRuntime::Location&) is fired for each location. The frequency at which AbstractLocationDataSource::updateLocation(const Esri::ArcGISRuntime::Location&) is called is determined by iterationRate. Populate the collection by calling setLocationsWithPolyline(const Esri::ArcGISRuntime::Polyline&) or by directly assigning a collection of Location to this property.

See also setLocations().

[override virtual protected slot] void SimulatedLocationDataSource::onStart()

Reimplements: AbstractLocationDataSource::onStart().

Reacts to start requests by starting the simulation.

[override virtual protected slot] void SimulatedLocationDataSource::onStop()

Reimplements: AbstractLocationDataSource::onStop().

Reacts to stop requests by stopping the simulation.

void SimulatedLocationDataSource::setCurrentLocationIndex(int currentLocationIndex)

Sets the currentLocationIndex to currentLocationIndex.

See also currentLocationIndex.

void SimulatedLocationDataSource::setIterationRate(double iterationRate)

Sets the iterationRate to iterationRate.

See also iterationRate.

void SimulatedLocationDataSource::setLocations(const QList<Esri::ArcGISRuntime::Location> &locations)

Sets the locations to locations.

See also locations.

void SimulatedLocationDataSource::setLocationsWithPolyline(const Esri::ArcGISRuntime::Polyline &polyline)

Creates a collection of locations using vertices from the input polyline.

The result locations can be obtained from SimulatedLocationDataSource::locations. These properties are populated based on the inputs: Location::timestamp, Location::position, Location::velocity,

These properties is calculated based on the inputs: Location::course

These properties are not set: Location::horizontalAccuracy, Location::verticalAccuracy, Location::isLastKnown.

• polyline - A polyline that defines a simulated travel path.

void SimulatedLocationDataSource::setLocationsWithPolyline(const Esri::ArcGISRuntime::Polyline &polyline, Esri::ArcGISRuntime::SimulationParameters *simulationParameters)

Creates a collection of locations along an input polyline based on simulation parameters.

The generated locations are available from the SimulatedLocationDataSource::locations property. Distance between each location on the polyline is determined by the value of SimulationParameters::velocity. If velocity is 10 meters per second, for example, the distance between locations will be 10 meters. The Location::timestamp values will always be 1 second apart. These location properties will be set based on the following inputs:

• Location::timestamp
• Location::position
• Location::velocity
• Location::horizontalAccuracy
• Location::verticalAccuracy

The Location::course property will be calculated based on the inputs. The Location::isLastKnown property will not be set.