QVideoDeviceSelectorControl Class

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

頭：	#include <QVideoDeviceSelectorControl>
qmake:	QT += multimedia
繼承：	QMediaControl

該類已過時。 提供它是為使舊源代碼能繼續工作。強烈建議不要在新代碼中使用它。

• 所有成員列錶，包括繼承成員

公共函數

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

公共槽

virtual void

setSelectedDevice (int index ) = 0

信號

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

保護函數

QVideoDeviceSelectorControl (QObject * parent = nullptr)

宏

	QCameraInfoControl_iid
	QVideoDeviceSelectorControl_iid

詳細描述

The 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.

The interface name of QVideoDeviceSelectorControl is org.qt-project.qt.videodeviceselectorcontrol/5.0 作為定義在 QVideoDeviceSelectorControl_iid .

成員函數文檔編製

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

Constructs a video device selector control with the given parent .

[signal] void QVideoDeviceSelectorControl:: devicesChanged ()

Signals that the list of available video devices has changed.

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

Signals that the selected video device name 已改變。

注意： 信號 selectedDeviceChanged 在此類中被重載。通過使用函數指針句法連接到此信號，Qt 提供用於獲得如此範例展示的函數指針的方便幫助程序：

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

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

Signals that the selected video device index 已改變。

注意： 信號 selectedDeviceChanged 在此類中被重載。通過使用函數指針句法連接到此信號，Qt 提供用於獲得如此範例展示的函數指針的方便幫助程序：

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

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

Sets the selected video device index .

另請參閱 selectedDevice ().

[虛擬] 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 .

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

Returns the index of the selected video device.

另請參閱 setSelectedDevice ().

宏文檔編製

QCameraInfoControl_iid

org.qt-project.qt.camerainfocontrol/5.3

Defines the interface name of the QCameraInfoControl class.

QVideoDeviceSelectorControl_iid

org.qt-project.qt.videodeviceselectorcontrol/5.0

定義接口名為 QVideoDeviceSelectorControl 類。

內容

1. 公共函數

2. 公共槽

3. 信號

4. 保護函數

5. 宏

6. 詳細描述