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    41 

    42 #include <QtCore/qmetaobject.h>

    43 #include <QtCore/qtimer.h>

    44 

    45 #include "qmediacontrol.h"

    46 #include "qmediacontrol_p.h"

    47 

    48 

    49 

    50 QT_BEGIN_NAMESPACE

    51 

    52 /*!

    53     \class QMediaControl

    54     \ingroup multimedia

    55 

    56     \preliminary

    57     \brief The QMediaControl class provides a base interface for media service controls.

    58 

    59     Media controls provide an interface to individual features provided by a

    60     media service.  Most services implement a principal control which exposes

    61     the core functionality of the service and a number optional controls which

    62     expose any additional functionality.

    63 

    64     A pointer to a control implemented by a media service can be obtained using

    65     the \l {QMediaService::requestControl()} member of QMediaService.  If the

    66     service doesn't implement a control it will instead return a null pointer.

    67 

    68     \code

    69     QMediaPlayerControl *control = qobject_cast<QMediaPlayerControl *>(

    70             service->requestControl("com.nokia.Qt.QMediaPlayerControl/1.0"));

    71     \endcode

    72 

    73     Alternatively if the IId of the control has been declared using

    74     Q_MEDIA_DECLARE_CONTROL the template version of

    75     QMediaService::requestControl() can be used to request the service without

    76     explicitly passing the IId.

    77 

    78     \code

    79     QMediaPlayerControl *control = service->requestControl<QMediaPlayerControl *>();

    80     \endcode

    81 

    82     Most application code will not interface directly with a media service's

    83     controls, instead the QMediaObject which owns the service acts as an

    84     intermediary between one or more controls and the application.

    85 

    86     \sa QMediaService, QMediaObject

    87 */

    88 

    89 /*!

    90     \macro Q_MEDIA_DECLARE_CONTROL(Class, IId)

    91     \relates QMediaControl

    92 

    93     The Q_MEDIA_DECLARE_CONTROL macro declares an \a IId for a \a Class that

    94     inherits from QMediaControl.

    95 

    96     Declaring an IId for a QMediaControl allows an instance of that control to

    97     be requested from QMediaService::requestControl() without explicitly

    98     passing the IId.

    99 

   100     \code

   101     QMediaPlayerControl *control = service->control<QMediaPlayerControl *>();

   102     \endcode

   103 

   104     \sa QMediaService::requestControl()

   105 */

   106 

   107 /*!

   108     Destroys a media control.

   109 */

   110 

   111 QMediaControl::~QMediaControl()

   112 {

   113     delete d_ptr;

   114 }

   115 

   116 /*!

   117     Constructs a media control with the given \a parent.

   118 */

   119 

   120 QMediaControl::QMediaControl(QObject *parent)

   121     : QObject(parent)

   122     , d_ptr(new QMediaControlPrivate)

   123 {

   124     d_ptr->q_ptr = this;

   125 }

   126 

   127 /*!

   128     \internal

   129 */

   130 

   131 QMediaControl::QMediaControl(QMediaControlPrivate &dd, QObject *parent)

   132     : QObject(parent)

   133     , d_ptr(&dd)

   134 

   135 {

   136     d_ptr->q_ptr = this;

   137 }

   138 

   139 #include "moc_qmediacontrol.cpp"

   140 QT_END_NAMESPACE

   141