The QMediaControl class provides a base interface for media service controls. More...
#include <QMediaControl>Inherits: QObject.
Inherited by: QAudioEncoderControl, QAudioEndpointSelector, QCameraCaptureBufferFormatControl, QCameraCaptureDestinationControl, QCameraControl, QCameraExposureControl, QCameraFlashControl, QCameraFocusControl, QCameraImageCaptureControl, QCameraImageProcessingControl, QCameraLocksControl, QImageEncoderControl, QMediaContainerControl, QMediaNetworkAccessControl, QMediaPlayerControl, QMediaPlaylistControl, QMediaPlaylistSourceControl, QMediaRecorderControl, QMediaStreamsControl, QMetaDataReaderControl, QMetaDataWriterControl, QRadioTunerControl, QVideoDeviceControl, QVideoEncoderControl, QVideoRendererControl, QVideoWidgetControl, and QVideoWindowControl.
This class was introduced in Qt Mobility 1.0.
| ~QMediaControl () |
| QMediaControl ( QObject * parent = 0 ) |
| 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 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("com.nokia.Qt.QMediaPlayerControl/1.0"));
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.
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.
Constructs a media control with the given parent.
This function was introduced in Qt Mobility 1.0.
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().