内容

• 公共类型
• 特性
• 公共函数
• 重实现公共函数
• 静态公共成员
• 详细描述
• QOrientationReading Units

QOrientationReading Class

The QOrientationReading class represents one reading from the orientation sensor. 更多...

头：	#include <QOrientationReading>
qmake:	QT += sensors
Since:	Qt 5.1
继承：	QSensorReading

• 所有成员列表，包括继承成员
• 过时成员

公共类型

enum	Orientation { Undefined, TopUp, TopDown, LeftUp, ..., FaceDown }

特性

• orientation : const Orientation

• 1 特性继承自 QSensorReading
• 1 特性继承自 QObject

公共函数

	QOrientationReading (QObject * parent = DECLARE_READING(QOrientationReading))
virtual	~QOrientationReading ()
QOrientationReading::Orientation	orientation () const
void	setOrientation (QOrientationReading::Orientation orientation )

重实现公共函数

virtual void

copyValuesFrom (QSensorReading * other ) override

• 4 公共函数继承自 QSensorReading
• 31 公共函数继承自 QObject

静态公共成员

const QMetaObject

staticMetaObject

• 9 静态公共成员继承自 QObject

额外继承成员

• 1 公共槽继承自 QObject
• 2 信号继承自 QObject
• 9 保护函数继承自 QObject

详细描述

The QOrientationReading class represents one reading from the orientation sensor.

The orientation sensor reports the orientation of the device. As it operates below the UI level it does not report on or even know how the UI is rotated. Most importantly this means that this sensor cannot be used to detect if a device is in portrait or landscape mode.

This sensor is useful to detect that a particular side of the device is pointing up.

QOrientationReading Units

The orientation sensor returns the orientation of the device using the pre-defined values found in the QOrientationReading::Orientation 枚举。

成员类型文档编制

enum QOrientationReading:: Orientation

This enum represents the orientation of the device.

To explain the meaning of each value it is helpful to refer to the following diagram.

The orientations are shown here in order: TopUp, TopDown, LeftUp, RightUp, FaceUp, FaceDown.

常量	值	描述
QOrientationReading::Undefined	0	The orientation is unknown.
QOrientationReading::TopUp	1	The Top edge of the device is pointing up.
QOrientationReading::TopDown	2	The Top edge of the device is pointing down.
QOrientationReading::LeftUp	3	The Left edge of the device is pointing up.
QOrientationReading::RightUp	4	The Right edge of the device is pointing up.
QOrientationReading::FaceUp	5	The Face of the device is pointing up.
QOrientationReading::FaceDown	6	The Face of the device is pointing down.

It should be noted that the orientation sensor reports the orientation of the device and not the UI. The orientation of the device will not change just because the UI is rotated. This means this sensor cannot be used to detect if a device is in portrait or landscape mode.

特性文档编制

orientation : const Orientation

This property holds the orientation of the device.

The unit is an enumeration describing the orientation of the device.

访问函数：

QOrientationReading::Orientation

orientation () const

另请参阅 QOrientationReading Units .

成员函数文档编制

QOrientationReading:: QOrientationReading ( QObject * parent = DECLARE_READING(QOrientationReading))

Default constructs an instance of QOrientationReading.

[virtual] QOrientationReading:: ~QOrientationReading ()

Destroys the instance of QOrientationReading. The destructor is virtual.

[override virtual] void QOrientationReading:: copyValuesFrom ( QSensorReading * other )

void QOrientationReading:: setOrientation ( QOrientationReading::Orientation orientation )

设置 orientation for the reading.

另请参阅 orientation ().