QCompassReading Class
The QCompassReading class represents one reading from a compass. More...
| Header: | #include <QCompassReading> |
| qmake: | QT += sensors |
| Since: | Qt 5.1 |
| Inherits: | QSensorReading |
Properties
- azimuth : const qreal
- calibrationLevel : const qreal
- 1 property inherited from QSensorReading
- 1 property inherited from QObject
Public Functions
| QCompassReading(QObject *parent = DECLARE_READING(QCompassReading)) | |
| virtual | ~QCompassReading() |
| qreal | azimuth() const |
| qreal | calibrationLevel() const |
| void | setAzimuth(qreal azimuth) |
| void | setCalibrationLevel(qreal calibrationLevel) |
Reimplemented Public Functions
| virtual void | copyValuesFrom(QSensorReading *other) override |
- 4 public functions inherited from QSensorReading
- 31 public functions inherited from QObject
Static Public Members
| const QMetaObject | staticMetaObject |
- 9 static public members inherited from QObject
Additional Inherited Members
- 1 public slot inherited from QObject
- 2 signals inherited from QObject
- 9 protected functions inherited from QObject
Detailed Description
The QCompassReading class represents one reading from a compass.
QCompassReading Units
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.
Property Documentation
azimuth : const qreal
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.
calibrationLevel : const qreal
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.
Member Function Documentation
QCompassReading::QCompassReading(QObject *parent = DECLARE_READING(QCompassReading))
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)
void QCompassReading::setAzimuth(qreal azimuth)
Sets the azimuth of the device.
See also azimuth() and QCompassReading Units.
void QCompassReading::setCalibrationLevel(qreal calibrationLevel)
Sets the calibration level of the reading to calibrationLevel.
See also calibrationLevel().
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