The QCompassReading class represents one reading from a compass. More...
| Header: | #include <QCompassReading> |
| qmake: | QT += sensors |
| Since: | Qt 5.1 |
| Inherits: | QSensorReading |
| QCompassReading(QObject *parent = DECLARE_READING(QCompassReading)) | |
| virtual | ~QCompassReading() |
| qreal | azimuth() const |
| qreal | calibrationLevel() const |
| void | setAzimuth(qreal azimuth) |
| void | setCalibrationLevel(qreal calibrationLevel) |
| virtual void | copyValuesFrom(QSensorReading *other) override |
The QCompassReading class represents one reading from a compass.
The compass returns the azimuth of the device as degrees from magnetic north in a clockwise direction based on the top of the device, as defined by QScreen::nativeOrientation. There is also a value to indicate the calibration status of the device. If the device is not calibrated the azimuth may not be accurate.
Digital compasses are susceptible to magnetic interference and may need calibration after being placed near anything that emits a magnetic force. Accuracy of the compass can be affected by any ferrous materials that are nearby.
The calibration status of the device is measured as a number from 0 to 1. A value of 1 is the highest level that the device can support and 0 is the worst.
This property holds the azimuth of the device.
Measured in degrees from magnetic north in a clockwise direction based on the top of the device, as defined by QPlatformScreen::nativeOrientation.
Access functions:
| qreal | azimuth() const |
See also QCompassReading Units.
This property holds the calibration level of the reading.
Measured as a value from 0 to 1 with higher values being better.
Access functions:
| qreal | calibrationLevel() const |
See also QCompassReading Units.
Default constructs an instance of QCompassReading.
[virtual] QCompassReading::~QCompassReading()Destroys the instance of QCompassReading. The destructor is virtual.
[override virtual] void QCompassReading::copyValuesFrom(QSensorReading *other)Sets the azimuth of the device.
See also azimuth() and QCompassReading Units.
Sets the calibration level of the reading to calibrationLevel.
See also calibrationLevel().
