QLightSensor Class
The QLightSensor class is a convenience wrapper around QSensor. More...
| Header: | #include <QLightSensor> |
| qmake: | QT += sensors |
| Since: | Qt 5.1 |
| Inherits: | QSensor |
This class was introduced in Qt 5.1.
Properties
- fieldOfView : const qreal
Public Functions
| QLightSensor(QObject *parent = Q_NULLPTR) | |
| virtual | ~QLightSensor() |
| qreal | fieldOfView() const |
| QLightReading * | reading() const |
| void | setFieldOfView(qreal fieldOfView) |
Signals
| void | fieldOfViewChanged(qreal fieldOfView) |
Detailed Description
The only behavioural difference is that this class sets the type properly.
This class also features a reading() function that returns a QLightReading instead of a QSensorReading.
For details about how the sensor works, see QLightReading.
See also QLightReading.
Property Documentation
fieldOfView : const qreal
This property holds a value indicating the field of view.
This is an angle that represents the field of view of the sensor.
Not all light sensor support retrieving their field of view. For sensors that don't support this property, the value will be 0. Whether the field of view is supported can be checked with QSensor::isFeatureSupported() and the QSensor::FieldOfView flag.
Access functions:
| qreal | fieldOfView() const |
Notifier signal:
| void | fieldOfViewChanged(qreal fieldOfView) |
Member Function Documentation
QLightSensor::QLightSensor(QObject *parent = Q_NULLPTR)
Construct the sensor as a child of parent.
[virtual] QLightSensor::~QLightSensor()
Destroy the sensor. Stops the sensor if it has not already been stopped.
QLightReading *QLightSensor::reading() const
Returns the reading class for this sensor.
See also QSensor::reading().
void QLightSensor::setFieldOfView(qreal fieldOfView)
Sets the field of view to fieldOfView. This is to be called from the backend.
This function was introduced in Qt 5.1.
See also fieldOfView().
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