The QMediaControl class provides a base interface for media service controls. More...
| virtual | ~QMediaControl() |
| QMediaControl(QObject *parent = nullptr) |
| Q_MEDIA_DECLARE_CONTROL(Class, IId) |
The QMediaControl class provides a base interface for media service controls.
Media controls provide an interface to individual features provided by a media service. Most services implement a principal control which exposes the core functionality of the service and a number of optional controls which expose any additional functionality.
A pointer to a control implemented by a media service can be obtained using the QMediaService::requestControl() member of QMediaService. If the service doesn't implement a control it will instead return a null pointer.
QMediaPlayerControl *control = qobject_cast<QMediaPlayerControl *>( mediaService->requestControl("org.qt-project.qt.mediaplayercontrol/5.0"));
Alternatively if the IId of the control has been declared using Q_MEDIA_DECLARE_CONTROL the template version of QMediaService::requestControl() can be used to request the service without explicitly passing the IId or using qobject_cast().
QMediaPlayerControl *control = mediaService->requestControl<QMediaPlayerControl *>();
Most application code will not interface directly with a media service's controls, instead the QMediaObject which owns the service acts as an intermediary between one or more controls and the application.
See also QMediaService and QMediaObject.
[protected] QMediaControl::QMediaControl(QObject *parent = nullptr)Constructs a media control with the given parent.
[virtual] QMediaControl::~QMediaControl()Destroys a media control.
The Q_MEDIA_DECLARE_CONTROL macro declares an IId for a Class that inherits from QMediaControl.
Declaring an IId for a QMediaControl allows an instance of that control to be requested from QMediaService::requestControl() without explicitly passing the IId.
QMediaPlayerControl *control = mediaService->requestControl<QMediaPlayerControl *>();
See also QMediaService::requestControl().
