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The QMetaDataWriterControl class provides write access to the meta-data of a QMediaService's media. More...
#include <QMetaDataWriterControl>
This class is under development and is subject to change.
Inherits QMediaControl.
~QMetaDataWriterControl () | |
virtual QStringList | availableExtendedMetaData () const = 0 |
virtual QList<QtMultimediaKit::MetaData> | availableMetaData () const = 0 |
virtual QVariant | extendedMetaData ( const QString & key ) const = 0 |
virtual bool | isMetaDataAvailable () const = 0 |
virtual bool | isWritable () const = 0 |
virtual QVariant | metaData ( QtMultimediaKit::MetaData key ) const = 0 |
virtual void | setExtendedMetaData ( const QString & key, const QVariant & value ) = 0 |
virtual void | setMetaData ( QtMultimediaKit::MetaData key, const QVariant & value ) = 0 |
void | metaDataAvailableChanged ( bool available ) |
void | metaDataChanged () |
void | writableChanged ( bool writable ) |
QMetaDataWriterControl ( QObject * parent = 0 ) |
QMetaDataWriterControl_iid |
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 well defined keys in the QtMultimediaKit::MetaData enumeration using the metaData() functions, or by string keys using the extendedMetaData() functions.
The functionality provided by this control is exposed to application code by the meta-data members of QMediaObject, and so meta-data access is potentially available in any of the media object classes. Any media service may implement QMetaDataControl.
The interface name of QMetaDataWriterControl is com.nokia.Qt.QMetaDataWriterControl/1.0 as defined in QMetaDataWriterControl_iid.
See also QMediaService::requestControl() and QMediaObject.
Construct a QMetaDataWriterControl with parent. This class is meant as a base class for service specific meta data providers so this constructor is protected.
Destroy the meta-data writer control.
Returns a list of keys there is extended meta-data available for.
Returns a list of keys there is meta-data available for.
Returns the meta-data for an abitrary string key.
The valid selection of keys for extended meta-data is determined by the provider and the meaning and type may differ between providers.
See also setExtendedMetaData().
Identifies if meta-data is available from a media service.
Returns true if the meta-data is available and false otherwise.
Identifies if a media service's meta-data can be edited.
Returns true if the meta-data is writable and false otherwise.
Returns the meta-data for the given key.
See also setMetaData().
Signal the availability of meta-data has changed, available will be true if the multimedia object has meta-data.
Signal the changes of meta-data.
Change the value of the meta-data element with an abitrary string key to value.
The valid selection of keys for extended meta-data is determined by the provider and the meaning and type may differ between providers.
See also extendedMetaData().
Sets the value of the meta-data element with the given key.
See also metaData().
Signal a change in the writable status of meta-data, writable will be true if meta-data elements can be added or adjusted.
com.nokia.Qt.QMetaDataWriterControl/1.0
Defines the interface name of the QMetaDataWriterControl class.
Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies) | Trademarks | Qt Mobility Project 1.0.2 |