QSensorReading Class Reference

QVariant QSensorReading::value ( int index ) const

Returns the value of the property at index.

Note that this function is slower than calling the data function directly.

Here is an example of getting a property via the different mechanisms available.

Accessing directly provides the best performance but requires compile-time knowledge of the data you are accessing.

    QAccelerometerReading *reading = ...;
    qreal x = reading->x();

You can also access a property by name. To do this you must call QObject::property().

    qreal x = reading->property("x").value<qreal>();

Finally, you can access values via numeric index.

    qreal x = reading->value(0).value<qreal>();

Note that value() can only access properties declared with Q_PROPERTY() in sub-classes of QSensorReading.

See also valueCount() and QObject::property().

    class MyReading : public QSensorReading
    {
        Q_OBJECT
        Q_PROPERTY(qreal myprop READ myprop)
        DECLARE_READING(MyReading)
    public:
        qreal myprop() const;
        vod setMyprop(qreal myprop);
    };

    IMPLEMENT_READING(MyReading)