The QMetaDataWriterControl class provides write access to the meta-data of a QMediaService's media. More...
#include <QMetaDataWriterControl>Inherits: QMediaControl.
This class was introduced in Qt Mobility 1.0.
| ~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.
This function was introduced in Qt Mobility 1.0.
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.
This function was introduced in Qt Mobility 1.0.
See also setExtendedMetaData().
Identifies if meta-data is available from a media service.
Returns true if the meta-data is available and false otherwise.
This function was introduced in Qt Mobility 1.0.
Identifies if a media service's meta-data can be edited.
Returns true if the meta-data is writable and false otherwise.
This function was introduced in Qt Mobility 1.0.
Returns the meta-data for the given key.
This function was introduced in Qt Mobility 1.0.
See also setMetaData().
Signal the availability of meta-data has changed, available will be true if the multimedia object has meta-data.
This function was introduced in Qt Mobility 1.0.
Signal the changes of meta-data.
This function was introduced in Qt Mobility 1.0.
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.
This function was introduced in Qt Mobility 1.0.
See also extendedMetaData().
Sets the value of the meta-data element with the given key.
This function was introduced in Qt Mobility 1.0.
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.
This function was introduced in Qt Mobility 1.0.
com.nokia.Qt.QMetaDataWriterControl/1.0
Defines the interface name of the QMetaDataWriterControl class.