QLightSensor Class

The QLightSensor class is a convenience wrapper around QSensor . 更多...

头：	#include <QLightSensor>
qmake:	QT += sensors
Since:	Qt 5.1
继承：	QSensor

该类在 Qt 5.1 引入。

所有成员列表，包括继承成员

特性

fieldOfView : const qreal

公共函数

	QLightSensor (QObject * parent = Q_NULLPTR)
virtual	~QLightSensor ()
qreal	fieldOfView () const
QLightReading *	reading () const
void	setFieldOfView (qreal fieldOfView )

信号

void	fieldOfViewChanged (qreal fieldOfView )

详细描述

唯一行为差异是此类正确设置类型。

此类还特征 reading () 函数返回 QLightReading 而不是 QSensorReading .

有关传感器如何工作的细节，见 QLightReading .

另请参阅 QLightReading .

特性文档编制

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 () 和 QSensor::FieldOfView 标志。

访问函数：

qreal

fieldOfView () const

通知程序信号：

void	fieldOfViewChanged (qreal fieldOfView )

成员函数文档编制

QLightSensor:: QLightSensor ( QObject * parent = Q_NULLPTR)

构造传感器作为子级对于 parent .

`[虚拟]` QLightSensor:: ~QLightSensor ()

销毁传感器。停止传感器若尚未停止。

QLightReading *QLightSensor:: reading () const

返回用于此传感器的读取类。

另请参阅 QSensor::reading ().

void QLightSensor:: setFieldOfView ( qreal fieldOfView )

Sets the field of view to fieldOfView . This is to be called from the backend.

该函数在 Qt 5.1 引入。

另请参阅 fieldOfView ().