#include <QtCore>

#include <qaccelerometer.h>

QTM_USE_NAMESPACE

namespace arrows{

}

class AccelerometerFilter : public QAccelerometerFilter

{

public:

    bool filter(QAccelerometerReading *reading)

    {

        if (arrow!=exArrow){

            qDebug() << "direction:" << arrow;

            exArrow = arrow;

        }

        return false; // don't store the reading in the sensor

    }

private:

    QString exArrow;

        // axis_x: LEFT or RIGHT

        if (abs(x)>abs(y)) return x>0?(arrows::ARROW_LEFT):(arrows::ARROW_RIGHT);

        // axis_y: UP or DOWN

        return y>0?(arrows::ARROW_DOWN):(arrows::ARROW_UP);

    }

    static qreal abs(qreal value) {return value<0?-value:value;}

};

int main(int argc, char **argv)

{

    QCoreApplication app(argc, argv);

    QAccelerometer sensor;

    if (!sensor.connectToBackend()) {

        qWarning("No Accelerometer available!");

    }

    AccelerometerFilter filter;

    sensor.addFilter(&filter);

    sensor.start();

    return app.exec();

}