QGeoSatelliteInfoSource Class

// Emit updates every 10 seconds if available
QGeoSatelliteInfoSource *source = QGeoSatelliteInfoSource::createDefaultSource(0);
if (source)
    source->setUpdateInterval(10000);

Member Function Documentation

QGeoSatelliteInfoSource::QGeoSatelliteInfoSource(QObject *parent)

Creates a satellite source with the specified parent.

[virtual] QGeoSatelliteInfoSource::~QGeoSatelliteInfoSource()

Destroys the satellite source.

[static] QStringList QGeoSatelliteInfoSource::availableSources()

Returns a list of available source plugins, including the default system backend if one is available.

[static] QGeoSatelliteInfoSource *QGeoSatelliteInfoSource::createDefaultSource(QObject *parent)

Creates and returns a source with the specified parent that reads from the system's default source of satellite update information, or the highest priority available plugin.

Returns 0 if the system has no default satellite source, no valid plugins could be found or the user does not have the permission to access the satellite data.

[static] QGeoSatelliteInfoSource *QGeoSatelliteInfoSource::createSource(const QString &sourceName, QObject *parent)

Creates and returns a source with the given parent, by loading the plugin named sourceName.

Returns 0 if the plugin cannot be found.

[pure virtual] QGeoSatelliteInfoSource::Error QGeoSatelliteInfoSource::error() const

Returns the last error that occurred.

This signal is not emitted when a requestTimeout() has occurred.

[signal] void QGeoSatelliteInfoSource::error(QGeoSatelliteInfoSource::Error satelliteError)

This signal is emitted after an error occurred. The satelliteError parameter describes the type of error that occurred.

Note: Signal error is overloaded in this class. To connect to this signal by using the function pointer syntax, Qt provides a convenient helper for obtaining the function pointer as shown in this example:

connect(geoSatelliteInfoSource, QOverload<QGeoSatelliteInfoSource::Error>::of(&QGeoSatelliteInfoSource::error),
    [=](QGeoSatelliteInfoSource::Error satelliteError){ /* ... */ });

[signal] void QGeoSatelliteInfoSource::requestTimeout()

Emitted if requestUpdate() was called and the current satellite information could not be retrieved within the specified timeout.

While the triggering of this signal may be considered an error condition, it does not imply the emission of the error() signal. Only the emission of requestTimeout() is required to indicate a timeout.

[pure virtual slot] void QGeoSatelliteInfoSource::requestUpdate(int timeout = ...)

Attempts to get the current satellite information and emit satellitesInViewUpdated() and satellitesInUseUpdated() with this information. If the current satellite information cannot be found within the given timeout (in milliseconds) or if timeout is less than the value returned by minimumUpdateInterval(), requestTimeout() is emitted.

If the timeout is zero, the timeout defaults to a reasonable timeout period as appropriate for the source.

This does nothing if another update request is in progress. However it can be called even if startUpdates() has already been called and regular updates are in progress.

[signal] void QGeoSatelliteInfoSource::satellitesInUseUpdated(const QList<QGeoSatelliteInfo> &satellites)

If startUpdates() or requestUpdate() is called, this signal is emitted when an update is available on the number of satellites that are currently in use.

These are the satellites that are used to get a "fix" - that is, those used to determine the current position.

The satellites parameter holds the satellites currently in use.

[signal] void QGeoSatelliteInfoSource::satellitesInViewUpdated(const QList<QGeoSatelliteInfo> &satellites)

If startUpdates() or requestUpdate() is called, this signal is emitted when an update is available on the satellites that are currently in view.

The satellites parameter holds the satellites currently in view.

QString QGeoSatelliteInfoSource::sourceName() const

Returns the unique name of the satellite source implementation in use.

This is the same name that can be passed to createSource() in order to create a new instance of a particular satellite source implementation.

[pure virtual slot] void QGeoSatelliteInfoSource::startUpdates()

Starts emitting updates at regular intervals. The updates will be provided whenever new satellite information becomes available.

If satellite information cannot be retrieved or some other form of timeout has occurred the satellitesInViewUpdated() and satellitesInUseUpdated() signals may be emitted with empty parameter lists.

See also satellitesInViewUpdated() and satellitesInUseUpdated().

[pure virtual slot] void QGeoSatelliteInfoSource::stopUpdates()

Stops emitting updates at regular intervals.