QGeoAreaMonitor Class Reference

Detailed Description

The QGeoAreaMonitor class enables the detection of proximity changes for a specified set of coordinates.

A QGeoAreaMonitor emits signals when the current position is in range, or has moved out of range, of a specified circular area. The area is specified by a coordinate (the center point) and a radius (in meters).

For example:

    public:
        MyClass::MyClass()
        {
            QGeoAreaMonitor *monitor = QGeoAreaMonitor::createDefaultMonitor();
            connect(monitor, SIGNAL(areaEntered(QGeoPositionInfo)),
                    this, SLOT(areaEntered(QGeoPositionInfo)));
            connect(monitor, SIGNAL(areaExited(QGeoPositionInfo)),
                    this, SLOT(areaExited(QGeoPositionInfo)));

            QGeoCoordinate bigBenLocation(51.50104, -0.124632);
            monitor->setCenter(bigBenLocation);
            monitor->setRadius(100);
        }

    public slots:
        void areaEntered(const QGeoPositionInfo &update)
        {
            qDebug() << "Now within 100 meters, current position is" << update.coordinate();
        }

        void areaExited(const QGeoPositionInfo &update)
        {
            qDebug() << "No longer within 100 meters, current position is" << update.coordinate();
        }

Property Documentation