Controls write access to the meta data of a QMediaService's media. More...

Inheritance diagram for QMetaDataWriterControl:

Public Signals
void	metaDataAvailableChanged (bool available)

void	metaDataChanged ()

void	metaDataChanged (const QString &key, const QVariant &value)

void	writableChanged (bool writable)

Public Signals inherited from QObject
void	destroyed (QObject *obj=nullptr)

void	objectNameChanged (const QString &objectName)

Public Methods
	~QMetaDataWriterControl ()

virtual QStringList	availableMetaData () const = 0

virtual bool	isMetaDataAvailable () const = 0

virtual bool	isWritable () const = 0

virtual QVariant	metaData (const QString &key) const = 0

virtual void	setMetaData (const QString &key, const QVariant &value) = 0

Public Methods inherited from QMediaControl
	~QMediaControl ()

Public Methods inherited from QObject
	QObject (QObject *parent=nullptr)

	~QObject ()

bool	blockSignals (bool block)

const QList< QObject * > &	children () const

bool	connect (const QObject *sender, const QString &signalMethod, const QString &location, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

bool	connect (const QObject *sender, const QString &signalMethod, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

bool	disconnect (const QObject *receiver, const QString &slotMethod=QString ()) const

bool	disconnect (const QString &signalMethod, const QString &location, const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const

bool	disconnect (const QString &signalMethod=QString (), const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const

void	dumpObjectInfo ()

void	dumpObjectTree ()

QList< QString >	dynamicPropertyNames () const

virtual bool	event (QEvent *event)

virtual bool	eventFilter (QObject watched, QEvent event)

template<typename T >
T	findChild (const QString &childName=QString ()) const

template<class T >
QList< T >	findChildren (const QRegularExpression &regExp, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

template<class T >
QList< T >	findChildren (const QString &childName=QString (), Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

bool	inherits (const QString &className) const

void	installEventFilter (QObject *filterObj)

bool	isWidgetType () const

bool	isWindowType () const

void	killTimer (int id)

const QMetaObject *	metaObject () const

void	moveToThread (QThread *targetThread)

QString	objectName () const

QObject *	parent () const

template<class T = QVariant>
T	property (const QString &name) const

void	removeEventFilter (QObject *obj)

void	setObjectName (const QString &name)

void	setParent (QObject *parent)

bool	setProperty (const QString &name, const QVariant &value)

bool	signalsBlocked () const

int	startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)

QThread *	thread () const

Protected Methods
	QMetaDataWriterControl (QObject *parent=nullptr)

Protected Methods inherited from QMediaControl
	QMediaControl (QObject *parent=nullptr)

Protected Methods inherited from QObject
virtual void	childEvent (QChildEvent *event)

virtual void	connectNotify (const QMetaMethod &signalMethod) const

virtual void	customEvent (QEvent *event)

virtual void	disconnectNotify (const QMetaMethod &signalMethod) const

bool	isSignalConnected (const QMetaMethod &signalMethod) const

int	receivers (const QString &signal) const

QObject *	sender () const

int	senderSignalIndex () const

virtual void	timerEvent (QTimerEvent *event)

Related Functions
These are not member functions
#define	QMetaDataWriterControl_iid "com.copperspice.CS.metaDataWriterControl/1.0"

Related Functions inherited from QObject
T	qobject_cast (QObject *object)

	QObjectList

Additional Inherited Members
Public Slots inherited from QObject
void	deleteLater ()

Static Public Methods inherited from QObject
static bool	connect (const QObject sender, const QMetaMethod &signalMethod, const QObject receiver, const QMetaMethod &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

static bool	connect (const QObject sender, const QString &signalMethod, const QObject receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection, const QString &location=QString ())

static bool	connect (const QObject sender, const QString &signalMethod, const QString &location, const QObject receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn >
static bool	connect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver receiver, SlotReturn (SlotClass::slotMethod)(SlotArgs...), Qt::ConnectionType type=Qt::AutoConnection)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T >
static bool	connect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, T slotLambda, Qt::ConnectionType type=Qt::AutoConnection)

static bool	disconnect (const QObject sender, const QMetaMethod &signalMethod, const QObject receiver, const QMetaMethod &slotMethod)

static bool	disconnect (const QObject sender, const QString &signalMethod, const QObject receiver, const QString &slotMethod)

static bool	disconnect (const QObject sender, const QString &signalMethod, const QString &location, const QObject receiver, const QString &slotMethod)

static bool	disconnect (const QObject sender, std::nullptr_t, const QObject receiver, std::nullptr_t)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver receiver, SlotReturn (SlotClass::slotMethod)(SlotArgs...))

template<class Sender , class SignalClass , class... SignalArgs, class Receiver >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, std::nullptr_t slotMethod=nullptr)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, T slotMethod)

static QMetaObject &	staticMetaObject ()

static QString	tr (const char text, const char comment=nullptr, std::optional< int > numArg=std::optional< int >())

Properties inherited from QObject
	objectName

Detailed Description

The QMetaDataWriterControl class provides write access to the meta data of a QMediaService's media. If a QMediaService can provide write access to the meta data of its current media it will implement QMetaDataWriterControl. This control provides functions for both retrieving and setting meta data values. Meta data may be addressed by the keys defined in the QMediaMetaData namespace.

The functionality provided by this control is exposed to application code by the meta data members of QMediaObject, and so metadata access is potentially available in any of the media object classes. Any media service may implement QMetaDataControl.

The interface name of QMetaDataWriterControl is "com.copperspice.CS.metaDataWriterControl/1.0" as defined in QMetaDataWriterControl_iid.

See also: QMediaService::requestControl(), QMediaObject

Constructor & Destructor Documentation

QMetaDataWriterControl::~QMetaDataWriterControl ( )

Destroy the meta data writer control.

QMetaDataWriterControl::QMetaDataWriterControl ( QObject * parent = nullptr )

explicitprotected

Construct a QMetaDataWriterControl with parent. This class is meant as a base class for service specific meta data providers so this constructor is protected.

Method Documentation

QStringList QMetaDataWriterControl::availableMetaData ( ) const

pure virtual

Returns a list of keys there is meta data available for.

bool QMetaDataWriterControl::isMetaDataAvailable ( ) const

pure virtual

Identifies if metadata is available from a media service. Returns true if the meta data is available and false otherwise.

bool QMetaDataWriterControl::isWritable ( ) const

pure virtual

Identifies if a media service's meta data can be edited. Returns true if the meta data is writable and false otherwise.

QVariant QMetaDataWriterControl::metaData ( const QString & key ) const

pure virtual

Returns the meta data for the given key.

void QMetaDataWriterControl::metaDataAvailableChanged ( bool available )

signal

Signal the availability of meta data has changed, available will be true if the multimedia object has meta data.

void QMetaDataWriterControl::metaDataChanged ( )

signal

Signals the changes of meta data. If multiple meta data elements are changed the metaDataChanged(const QString &key, const QVariant &value) signal is emitted for each of them with metaDataChanged() changed emitted once.

void QMetaDataWriterControl::metaDataChanged	(	const QString &	key,
		const QVariant &	value
	)

signal

Signal the changes of one meta data element value with the given key.

void QMetaDataWriterControl::setMetaData	(	const QString &	key,
		const QVariant &	value
	)

pure virtual

Sets the value of the meta data element with the given key.

void QMetaDataWriterControl::writableChanged ( bool writable )

signal

Indicates a change in the writable status of meta data. The value for writable will be true if meta data elements can be added or adjusted.

Friends And Related Function Documentation

#define QMetaDataWriterControl_iid "com.copperspice.CS.metaDataWriterControl/1.0"

Public Signals

Public Methods

Protected Methods

Related Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Method Documentation

Friends And Related Function Documentation