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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** This file is part of the examples of the Qt Mobility Components.
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#include <QtCore>
#include <qproximitysensor.h>

QTM_USE_NAMESPACE

class ProximitySensorFilter : public QProximityFilter
{
public:
    qtimestamp stamp;
    bool filter(QProximityReading *reading)
    {
        int diff = ( reading->timestamp() - stamp );
        stamp = reading->timestamp();
        QTextStream out(stdout);
        out << "Proximity: ";
        if (reading->close())
            out << "Close    ";
        else
            out << "Not close";
        out << QString(" (%1 ms since last, %2 Hz)").arg(diff / 1000, 5).arg( 1000000.0 / diff, 3, 'f', 1) << endl;
        return false; // don't store the reading in the sensor
    }
};

int main(int argc, char **argv)
{
    QCoreApplication app(argc, argv);
    QStringList args = app.arguments();
    int rate_place = args.indexOf("-r");
    int rate_val = 0;
    if (rate_place != -1)
        rate_val = args.at(rate_place + 1).toInt();
    QProximitySensor sensor;
    sensor.connectToBackend();

    if (rate_val > 0) {
        sensor.setDataRate(rate_val);
    }
    ProximitySensorFilter filter;
    sensor.addFilter(&filter);
    sensor.start();
    if (!sensor.isActive()) {
        qWarning("Proximitysensor didn't start!");
        return 1;
    }

    return app.exec();
}