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Made QRadioData bind to QRadioTuner to avoid using multiple services

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QRadioData has been updated to be a QMediaBindableInterface, and it
will bind to a QRadioTuner instance, i.e. a QMediaObject that provides
a service which implements the QRadioDataControl.
This change is reflected in the declarative implementations of radio
tuner and data. There is a new `radioData` property in the Radio element
which will give access to the declarative RadioData element for the
tuner.
If a RadioData element is created in QML, it will have an anonymous
tuner which communicates with the underlying media service (which is
pretty much the same how the QRadioTuner and QRadioData classes work
previously).
Updated radio tuner and data test cases to use availability control
and extended the mock media service to allow providing a number of
controls rather than just one (needed for testing availability of
all classes extending from or using QMediaObject).

Change-Id: Id41dde66eee529decd828fd2dcdfe4a54c0e81f4
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>
This commit is contained in:
Jonas Rabbe
2012-03-08 11:05:30 +10:00
committed by Qt by Nokia
parent a15b9d3ce8
commit 942ff7a3c6
12 changed files with 319 additions and 118 deletions
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152
src/multimedia/radio/qradiodata.cpp
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@@ -75,47 +75,64 @@ namespace
The radio data object will emit signals for any changes in radio data. You can enable or disable
alternative frequency with setAlternativeFrequenciesEnabled().
You can get a QRadioData instance fromt the \l{QRadioTuner::radioData()}{radioData}
property from a QRadioTuner instance.
\snippet doc/src/snippets/multimedia-snippets/media.cpp Radio data setup
Alternatively, you can pass an instance of QRadioTuner to the constructor to QRadioData.
\sa {Radio Overview}
*/
class QRadioDataPrivate : public QMediaObjectPrivate
class QRadioDataPrivate
{
Q_DECLARE_NON_CONST_PUBLIC(QRadioData)
public:
QRadioDataPrivate():provider(0), control(0) {}
QMediaServiceProvider *provider;
QRadioDataPrivate();
QMediaObject *mediaObject;
QRadioDataControl* control;
void _q_serviceDestroyed();
QRadioData *q_ptr;
};
/*!
Constructs a radio data based on a media service allocated by a media service \a provider.
QRadioDataPrivate::QRadioDataPrivate()
: mediaObject(0)
, control(0)
{}
The \a parent is passed to QMediaObject.
void QRadioDataPrivate::_q_serviceDestroyed()
{
mediaObject = 0;
control = 0;
}
/*!
Constructs a radio data based on a media object.
The \a mediaObject should be an instance of \l QRadioTuner. It is preferable to use the
\l{QRadioTuner::radioData()}{radioData} property on a QRadioTuner instance to get an instance
of QRadioData.
During construction, this class is bound to the \a mediaObject using the
\l{QMediaObject::bind()}{bind()} method.
*/
QRadioData::QRadioData(QObject *parent):
QMediaObject(*new QRadioDataPrivate,
parent,
QMediaServiceProvider::defaultServiceProvider()->requestService(Q_MEDIASERVICE_RADIO))
QRadioData::QRadioData(QMediaObject *mediaObject, QObject *parent)
: QObject(parent)
, d_ptr(new QRadioDataPrivate)
{
Q_D(QRadioData);
d->provider = QMediaServiceProvider::defaultServiceProvider();
d->q_ptr = this;
if (d->service != 0) {
d->control = qobject_cast<QRadioDataControl*>(d->service->requestControl(QRadioDataControl_iid));
if (d->control != 0) {
connect(d->control, SIGNAL(stationIdChanged(QString)), SIGNAL(stationIdChanged(QString)));
connect(d->control, SIGNAL(programTypeChanged(QRadioData::ProgramType)),
SIGNAL(programTypeChanged(QRadioData::ProgramType)));
connect(d->control, SIGNAL(programTypeNameChanged(QString)), SIGNAL(programTypeNameChanged(QString)));
connect(d->control, SIGNAL(stationNameChanged(QString)), SIGNAL(stationNameChanged(QString)));
connect(d->control, SIGNAL(radioTextChanged(QString)), SIGNAL(radioTextChanged(QString)));
connect(d->control, SIGNAL(alternativeFrequenciesEnabledChanged(bool)), SIGNAL(alternativeFrequenciesEnabledChanged(bool)));
connect(d->control, SIGNAL(error(QRadioData::Error)), SIGNAL(error(QRadioData::Error)));
}
}
if (mediaObject)
mediaObject->bind(this);
}
/*!
@@ -126,14 +143,93 @@ QRadioData::~QRadioData()
{
Q_D(QRadioData);
if (d->service && d->control)
d->service->releaseControl(d->control);
if (d->mediaObject)
d->mediaObject->unbind(this);
d->provider->releaseService(d->service);
delete d_ptr;
}
/*!
\reimp
*/
QMediaObject *QRadioData::mediaObject() const
{
return d_func()->mediaObject;
}
/*!
\reimp
*/
bool QRadioData::setMediaObject(QMediaObject *mediaObject)
{
Q_D(QRadioData);
if (d->mediaObject) {
if (d->control) {
disconnect(d->control, SIGNAL(stationIdChanged(QString)),
this, SIGNAL(stationIdChanged(QString)));
disconnect(d->control, SIGNAL(programTypeChanged(QRadioData::ProgramType)),
this, SIGNAL(programTypeChanged(QRadioData::ProgramType)));
disconnect(d->control, SIGNAL(programTypeNameChanged(QString)),
this, SIGNAL(programTypeNameChanged(QString)));
disconnect(d->control, SIGNAL(stationNameChanged(QString)),
this, SIGNAL(stationNameChanged(QString)));
disconnect(d->control, SIGNAL(radioTextChanged(QString)),
this, SIGNAL(radioTextChanged(QString)));
disconnect(d->control, SIGNAL(alternativeFrequenciesEnabledChanged(bool)),
this, SIGNAL(alternativeFrequenciesEnabledChanged(bool)));
disconnect(d->control, SIGNAL(error(QRadioData::Error)),
this, SIGNAL(error(QRadioData::Error)));
QMediaService *service = d->mediaObject->service();
service->releaseControl(d->control);
disconnect(service, SIGNAL(destroyed()), this, SLOT(_q_serviceDestroyed()));
}
}
d->mediaObject = mediaObject;
if (d->mediaObject) {
QMediaService *service = mediaObject->service();
if (service) {
d->control = qobject_cast<QRadioDataControl*>(service->requestControl(QRadioDataControl_iid));
if (d->control) {
connect(d->control, SIGNAL(stationIdChanged(QString)),
this, SIGNAL(stationIdChanged(QString)));
connect(d->control, SIGNAL(programTypeChanged(QRadioData::ProgramType)),
this, SIGNAL(programTypeChanged(QRadioData::ProgramType)));
connect(d->control, SIGNAL(programTypeNameChanged(QString)),
this, SIGNAL(programTypeNameChanged(QString)));
connect(d->control, SIGNAL(stationNameChanged(QString)),
this, SIGNAL(stationNameChanged(QString)));
connect(d->control, SIGNAL(radioTextChanged(QString)),
this, SIGNAL(radioTextChanged(QString)));
connect(d->control, SIGNAL(alternativeFrequenciesEnabledChanged(bool)),
this, SIGNAL(alternativeFrequenciesEnabledChanged(bool)));
connect(d->control, SIGNAL(error(QRadioData::Error)),
this, SIGNAL(error(QRadioData::Error)));
connect(service, SIGNAL(destroyed()), this, SLOT(_q_serviceDestroyed()));
return true;
}
}
}
// without QRadioDataControl discard the media object
d->mediaObject = 0;
d->control = 0;
return false;
}
/*!
Returns the availability of the radio data service.
A long as there is a media service which provides control, then the
\l{QtMultimedia::AvailabilityError}{availability error} will be that
of the \l{QRadioTuner::availabilityError()}{radio tuner}.
*/
QtMultimedia::AvailabilityError QRadioData::availabilityError() const
{
@@ -142,7 +238,7 @@ QtMultimedia::AvailabilityError QRadioData::availabilityError() const
if (d->control == 0)
return QtMultimedia::ServiceMissingError;
return QMediaObject::availabilityError();
return d->mediaObject->availabilityError();
}
/*!