QLightSensor Class
The QLightSensor class is a convenience wrapper around QSensor. 更多...
| 头文件: | #include <QLightSensor> |
| qmake: | QT += sensors |
| 开始支持版本: | Qt 5.1 |
| 基类: | QSensor |
属性
- fieldOfView : const qreal
公有函数
| QLightSensor(QObject *parent = Q_NULLPTR) | |
| virtual | ~QLightSensor() |
| qreal | fieldOfView() const |
| QLightReading * | reading() const |
| void | setFieldOfView(qreal fieldOfView) |
信号
| void | fieldOfViewChanged(qreal fieldOfView) |
其他继承的成员
- 2 个公有槽函数继承自 QSensor
- 1 个公有槽函数继承自 QObject
- 1 个公有变量继承自 QObject
- 3 个静态公有成员继承自 QSensor
- 10 个静态公有成员继承自 QObject
- 9 个受保护的函数继承自 QObject
- 2 个受保护的变量继承自 QObject
详细描述
The QLightSensor class is a convenience wrapper around QSensor.
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.
参见 QLightReading.
属性
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.
访问函数:
| qreal | fieldOfView() const |
Notifier signal:
| void | fieldOfViewChanged(qreal fieldOfView) |
成员函数
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.
参见 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.
参见 fieldOfView().