Qt Documentation

Contents

QVideoDeviceSelectorControl Class

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

Header: #include <QVideoDeviceSelectorControl>
qmake: QT += multimedia
Inherits: QMediaControl

Public Functions

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

Public Slots

virtual void setSelectedDevice(int index) = 0

Signals

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

Protected Functions

QVideoDeviceSelectorControl(QObject *parent = nullptr)

Macros

QCameraInfoControl_iid
QVideoDeviceSelectorControl_iid

Detailed Description

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 as defined in QVideoDeviceSelectorControl_iid.

Member Function Documentation

[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 has changed.

Note: Signal selectedDeviceChanged is overloaded in this class. To connect to this signal by using the function pointer syntax, Qt provides a convenient helper for obtaining the function pointer as shown in this example:

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

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

Signals that the selected video device index has changed.

Note: Signal selectedDeviceChanged is overloaded in this class. To connect to this signal by using the function pointer syntax, Qt provides a convenient helper for obtaining the function pointer as shown in this example:

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

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

Sets the selected video device index.

See also selectedDevice().

[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.

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

Returns the index of the selected video device.

See also setSelectedDevice().

Macro Documentation

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

Defines the interface name of the QVideoDeviceSelectorControl class.

© 2020 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.