QAltimeterReading
Since: 1.3
#include <QtSensors/QAltimeterReading>
QtSensors
The QAltimeterReading class holds readings from the altimeter sensor.
The altitude is reported in meters relative to mean sea level.
On BlackBerry, the altimeter uses a combination of pressure and location to determine the altitude, as using pressure alone would yield to inaccurate results due to changes in air pressure caused by the weather. The location information is used to compensate for the weather. This requires that the user has enabled location services in the global settings.
Overview
Inheritance
| QSensorReading | ||
| QAltimeterReading | ||
Public Functions Index
| qreal | altitude () const |
| void | setAltitude (qreal altitude) |
| void | setTimestamp (qtimestamp timestamp) |
| qtimestamp | timestamp () const |
| QVariant | value (int index) const |
| int | valueCount () const |
Protected Functions Index
Only has inherited protected functions
| virtual void | copyValuesFrom (QSensorReading *other) |
| QScopedPointer< QSensorReadingPrivate > * | d_ptr () |
| QSensorReading (QObject *parent, QSensorReadingPrivate *d) |
Properties
qreal
The altitude in meters relative to mean sea level.
QtMobility::qtimestamp timestamp[read-only]
the timestamp of the reading.
Public Functions
qreal
void
Sets the altitude to altitude.
void
Sets the timestamp of the reading.
1.0
QVariant
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.
valueCount(), QObject::property()
1.0
int
Returns the number of extra properties that the reading has.
Note that this does not count properties declared in QSensorReading.
1.0
Protected Functions
(Only has inherited protected functions)
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