内容

• 公共函数
• 公共槽
• 信号
• 保护函数
• 宏
• 详细描述

QVideoDeviceSelectorControl Class

QVideoDeviceSelectorControl class provides an video device selector media control. 更多...

头：	#include <QVideoDeviceSelectorControl>
qmake:	QT += multimedia
继承：	QMediaControl

• 所有成员列表，包括继承成员

公共函数

virtual	~QVideoDeviceSelectorControl ()
virtual int	defaultDevice () const = 0
virtual int	deviceCount () const = 0
virtual QString	deviceDescription (int index ) const = 0
virtual QString	deviceName (int index ) const = 0
virtual int	selectedDevice () const = 0

• 32 公共函数继承自 QObject

公共槽

virtual void

setSelectedDevice (int index ) = 0

• 1 公共槽继承自 QObject

信号

void	devicesChanged ()
void	selectedDeviceChanged (int index )
void	selectedDeviceChanged (const QString & name )

• 2 信号继承自 QObject

保护函数

QVideoDeviceSelectorControl (QObject * parent = Q_NULLPTR)

• 9 保护函数继承自 QObject

宏

	QCameraInfoControl_iid
	QVideoDeviceSelectorControl_iid

额外继承成员

• 1 特性继承自 QObject
• 11 静态公共成员继承自 QObject

详细描述

QVideoDeviceSelectorControl class provides an video device selector media control.

QVideoDeviceSelectorControl class provides descriptions of the video devices available on a system and allows one to be selected as the endpoint of a media service.

接口名称对于 QVideoDeviceSelectorControl is org.qt-project.qt.videodeviceselectorcontrol/5.0 作为定义在 QVideoDeviceSelectorControl_iid .

成员函数文档编制

[protected] QVideoDeviceSelectorControl:: QVideoDeviceSelectorControl ( QObject * parent = Q_NULLPTR)

Constructs a video device selector control with the given parent .

[virtual] QVideoDeviceSelectorControl:: ~QVideoDeviceSelectorControl ()

Destroys a video device selector control.

[pure virtual] int QVideoDeviceSelectorControl:: defaultDevice () const

Returns the index of the default video device.

[pure virtual] int QVideoDeviceSelectorControl:: deviceCount () const

Returns the number of available video devices;

[pure virtual] QString QVideoDeviceSelectorControl:: deviceDescription ( int index ) const

Returns a description of the video device at index .

[pure virtual] QString QVideoDeviceSelectorControl:: deviceName ( int index ) const

Returns the name of the video device at index .

[signal] void QVideoDeviceSelectorControl:: devicesChanged ()

Signals that the list of available video devices has changed.

[pure virtual] int QVideoDeviceSelectorControl:: selectedDevice () const

Returns the index of the selected video device.

另请参阅 setSelectedDevice ().

[signal] void QVideoDeviceSelectorControl:: selectedDeviceChanged ( int index )

Signals that the selected video device index 已改变。

注意： 信号 selectedDeviceChanged 在此类中是重载。要使用函数指针句法连接到此信号，必须在静态铸造中指定信号类型，如此范例所示：

connect(videoDeviceSelectorControl, static_cast<void(QVideoDeviceSelectorControl::*)(int)>(&QVideoDeviceSelectorControl::selectedDeviceChanged),
    [=](int index){ /* ... */ });
					

[signal] void QVideoDeviceSelectorControl:: selectedDeviceChanged (const QString & name )

Signals that the selected video device name 已改变。

注意： 信号 selectedDeviceChanged 在此类中是重载。要使用函数指针句法连接到此信号，必须在静态铸造中指定信号类型，如此范例所示：

connect(videoDeviceSelectorControl, static_cast<void(QVideoDeviceSelectorControl::*)(const QString &)>(&QVideoDeviceSelectorControl::selectedDeviceChanged),
    [=](const QString &name){ /* ... */ });
					

[pure virtual slot] void QVideoDeviceSelectorControl:: setSelectedDevice ( int index )

Sets the selected video device index .

另请参阅 selectedDevice ().

宏文档编制

QCameraInfoControl_iid

org.qt-project.qt.camerainfocontrol/5.3

定义接口名为 QCameraInfoControl 类。

QVideoDeviceSelectorControl_iid

org.qt-project.qt.videodeviceselectorcontrol/5.0

定义接口名为 QVideoDeviceSelectorControl 类。