author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 11 Jun 2010 14:26:25 +0300 | |
changeset 11 | 06b8e2af4411 |
parent 5 | 453da2cfceef |
child 14 | 6fbed849b4f4 |
permissions | -rw-r--r-- |
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/**************************************************************************** |
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** |
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (qt-info@nokia.com) |
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** |
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** This file is part of the Qt Mobility Components. |
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** |
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** $QT_BEGIN_LICENSE:LGPL$ |
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** No Commercial Usage |
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** This file contains pre-release code and may not be distributed. |
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** You may use this file in accordance with the terms and conditions |
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** contained in the Technology Preview License Agreement accompanying |
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** this package. |
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** |
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** GNU Lesser General Public License Usage |
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** Alternatively, this file may be used under the terms of the GNU Lesser |
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** General Public License version 2.1 as published by the Free Software |
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** Foundation and appearing in the file LICENSE.LGPL included in the |
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** packaging of this file. Please review the following information to |
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** ensure the GNU Lesser General Public License version 2.1 requirements |
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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** |
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** In addition, as a special exception, Nokia gives you certain additional |
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** rights. These rights are described in the Nokia Qt LGPL Exception |
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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** |
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** If you have questions regarding the use of this file, please contact |
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** Nokia at qt-info@nokia.com. |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** $QT_END_LICENSE$ |
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** |
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****************************************************************************/ |
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#include <QtCore/qmetaobject.h> |
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#include "qmediaobject_p.h" |
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#include "qmediaservice.h" |
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#include "qmetadatacontrol.h" |
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QT_BEGIN_NAMESPACE |
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void QMediaObjectPrivate::_q_notify() |
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{ |
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Q_Q(QMediaObject); |
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const QMetaObject* m = q->metaObject(); |
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foreach (int pi, notifyProperties) { |
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QMetaProperty p = m->property(pi); |
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p.notifySignal().invoke( |
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q, QGenericArgument(QMetaType::typeName(p.userType()), p.read(q).data())); |
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} |
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} |
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/*! |
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\class QMediaObject |
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\preliminary |
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\brief The QMediaObject class provides a common base for multimedia objects. |
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\ingroup multimedia |
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QMediaObject derived classes provide access to the functionality of a |
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QMediaService. Each media object hosts a QMediaService and uses the |
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QMediaControl interfaces implemented by the service to implement its |
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API. Most media objects when constructed will request a new |
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QMediaService instance from a QMediaServiceProvider, but some like |
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QMediaRecorder will share a service with another object. |
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QMediaObject itself provides an API for accessing a media service's \l {metaData()}{meta-data} and a means of connecting other media objects, |
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and peripheral classes like QVideoWidget and QMediaPlaylist. |
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\sa QMediaService, QMediaControl |
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*/ |
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/*! |
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Destroys a media object. |
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*/ |
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QMediaObject::~QMediaObject() |
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{ |
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delete d_ptr; |
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} |
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/*! |
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Returns the service availability error state. |
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*/ |
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QtMediaServices::AvailabilityError QMediaObject::availabilityError() const |
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{ |
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return QtMediaServices::ServiceMissingError; |
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} |
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/*! |
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Returns true if the service is available for use. |
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*/ |
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bool QMediaObject::isAvailable() const |
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{ |
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return false; |
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} |
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/*! |
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Returns the media service that provides the functionality of a multimedia object. |
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*/ |
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QMediaService* QMediaObject::service() const |
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{ |
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return d_func()->service; |
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} |
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int QMediaObject::notifyInterval() const |
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{ |
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return d_func()->notifyTimer->interval(); |
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} |
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void QMediaObject::setNotifyInterval(int milliSeconds) |
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{ |
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Q_D(QMediaObject); |
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if (d->notifyTimer->interval() != milliSeconds) { |
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d->notifyTimer->setInterval(milliSeconds); |
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emit notifyIntervalChanged(milliSeconds); |
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} |
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} |
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/*! |
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\internal |
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*/ |
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void QMediaObject::bind(QObject*) |
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{ |
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} |
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/*! |
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\internal |
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*/ |
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void QMediaObject::unbind(QObject*) |
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{ |
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} |
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/*! |
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Constructs a media object which uses the functionality provided by a media \a service. |
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The \a parent is passed to QObject. |
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This class is meant as a base class for Multimedia objects so this |
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constructor is protected. |
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*/ |
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QMediaObject::QMediaObject(QObject *parent, QMediaService *service): |
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QObject(parent), |
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d_ptr(new QMediaObjectPrivate) |
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{ |
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Q_D(QMediaObject); |
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d->q_ptr = this; |
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d->notifyTimer = new QTimer(this); |
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d->notifyTimer->setInterval(1000); |
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connect(d->notifyTimer, SIGNAL(timeout()), SLOT(_q_notify())); |
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d->service = service; |
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setupMetaData(); |
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} |
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/*! |
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\internal |
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*/ |
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QMediaObject::QMediaObject(QMediaObjectPrivate &dd, QObject *parent, |
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QMediaService *service): |
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QObject(parent), |
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d_ptr(&dd) |
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{ |
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Q_D(QMediaObject); |
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d->q_ptr = this; |
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d->notifyTimer = new QTimer(this); |
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d->notifyTimer->setInterval(1000); |
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connect(d->notifyTimer, SIGNAL(timeout()), SLOT(_q_notify())); |
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d->service = service; |
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setupMetaData(); |
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} |
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/*! |
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Watch the property \a name. The property's notify signal will be emitted |
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once every notifyInterval milliseconds. |
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\sa notifyInterval |
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*/ |
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void QMediaObject::addPropertyWatch(QByteArray const &name) |
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{ |
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Q_D(QMediaObject); |
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const QMetaObject* m = metaObject(); |
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int index = m->indexOfProperty(name.constData()); |
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if (index != -1 && m->property(index).hasNotifySignal()) { |
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d->notifyProperties.insert(index); |
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if (!d->notifyTimer->isActive()) |
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d->notifyTimer->start(); |
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} |
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} |
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/*! |
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Remove property \a name from the list of properties whose changes are |
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regularly signaled. |
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\sa notifyInterval |
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*/ |
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void QMediaObject::removePropertyWatch(QByteArray const &name) |
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{ |
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Q_D(QMediaObject); |
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int index = metaObject()->indexOfProperty(name.constData()); |
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if (index != -1) { |
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d->notifyProperties.remove(index); |
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if (d->notifyProperties.isEmpty()) |
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d->notifyTimer->stop(); |
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} |
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} |
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/*! |
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\property QMediaObject::notifyInterval |
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The interval at which notifiable properties will update. |
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The interval is expressed in milliseconds, the default value is 1000. |
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\sa addPropertyWatch(), removePropertyWatch() |
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*/ |
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/*! |
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\fn void QMediaObject::notifyIntervalChanged(int milliseconds) |
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Signal a change in the notify interval period to \a milliseconds. |
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*/ |
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/*! |
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\property QMediaObject::metaDataAvailable |
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\brief whether access to a media object's meta-data is available. |
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If this is true there is meta-data available, otherwise there is no meta-data available. |
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*/ |
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bool QMediaObject::isMetaDataAvailable() const |
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{ |
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Q_D(const QMediaObject); |
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return d->metaDataControl |
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? d->metaDataControl->isMetaDataAvailable() |
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: false; |
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} |
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/*! |
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\fn QMediaObject::metaDataAvailableChanged(bool available) |
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Signals that the \a available state of a media object's meta-data has changed. |
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*/ |
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/*! |
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\property QMediaObject::metaDataWritable |
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\brief whether a media object's meta-data is writable. |
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If this is true the meta-data is writable, otherwise the meta-data is read-only. |
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*/ |
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bool QMediaObject::isMetaDataWritable() const |
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{ |
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Q_D(const QMediaObject); |
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return d->metaDataControl |
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? d->metaDataControl->isWritable() |
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: false; |
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} |
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/*! |
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\fn QMediaObject::metaDataWritableChanged(bool writable) |
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Signals that the \a writable state of a media object's meta-data has changed. |
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*/ |
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/*! |
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Returns the value associated with a meta-data \a key. |
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*/ |
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QVariant QMediaObject::metaData(QtMediaServices::MetaData key) const |
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{ |
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Q_D(const QMediaObject); |
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|
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return d->metaDataControl |
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? d->metaDataControl->metaData(key) |
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: QVariant(); |
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} |
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|
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/*! |
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Sets a \a value for a meta-data \a key. |
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*/ |
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void QMediaObject::setMetaData(QtMediaServices::MetaData key, const QVariant &value) |
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{ |
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Q_D(QMediaObject); |
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|
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if (d->metaDataControl) |
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d->metaDataControl->setMetaData(key, value); |
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} |
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|
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/*! |
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Returns a list of keys there is meta-data available for. |
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*/ |
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QList<QtMediaServices::MetaData> QMediaObject::availableMetaData() const |
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{ |
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Q_D(const QMediaObject); |
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|
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return d->metaDataControl |
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? d->metaDataControl->availableMetaData() |
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: QList<QtMediaServices::MetaData>(); |
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} |
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|
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/*! |
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\fn QMediaObject::metaDataChanged() |
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342 |
|
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Signals that a media object's meta-data has changed. |
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*/ |
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|
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/*! |
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Returns the value associated with a meta-data \a key. |
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348 |
|
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The naming and type of extended meta-data is not standardized, so the values and meaning |
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of keys may vary between backends. |
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*/ |
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QVariant QMediaObject::extendedMetaData(const QString &key) const |
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{ |
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Q_D(const QMediaObject); |
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355 |
|
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return d->metaDataControl |
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? d->metaDataControl->extendedMetaData(key) |
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: QVariant(); |
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} |
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360 |
|
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361 |
/*! |
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Sets a \a value for a meta-data \a key. |
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363 |
|
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The naming and type of extended meta-data is not standardized, so the values and meaning |
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of keys may vary between backends. |
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*/ |
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void QMediaObject::setExtendedMetaData(const QString &key, const QVariant &value) |
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{ |
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Q_D(QMediaObject); |
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370 |
|
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if (d->metaDataControl) |
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d->metaDataControl->setExtendedMetaData(key, value); |
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} |
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|
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375 |
/*! |
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Returns a list of keys there is extended meta-data available for. |
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*/ |
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QStringList QMediaObject::availableExtendedMetaData() const |
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{ |
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Q_D(const QMediaObject); |
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381 |
|
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return d->metaDataControl |
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? d->metaDataControl->availableExtendedMetaData() |
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: QStringList(); |
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385 |
} |
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|
386 |
|
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387 |
|
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|
388 |
void QMediaObject::setupMetaData() |
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389 |
{ |
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Q_D(QMediaObject); |
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|
391 |
|
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392 |
if (d->service != 0) { |
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d->metaDataControl = |
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|
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qobject_cast<QMetaDataControl*>(d->service->control(QMetaDataControl_iid)); |
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395 |
|
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|
396 |
if (d->metaDataControl) { |
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|
397 |
connect(d->metaDataControl, SIGNAL(metaDataChanged()), SIGNAL(metaDataChanged())); |
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connect(d->metaDataControl, |
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|
399 |
SIGNAL(metaDataAvailableChanged(bool)), |
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400 |
SIGNAL(metaDataAvailableChanged(bool))); |
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Revision: 201011
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|
401 |
connect(d->metaDataControl, |
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|
402 |
SIGNAL(writableChanged(bool)), |
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Revision: 201011
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|
403 |
SIGNAL(metaDataWritableChanged(bool))); |
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Revision: 201011
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|
404 |
} |
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Revision: 201011
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|
405 |
} |
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Revision: 201011
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parents:
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|
406 |
} |
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Revision: 201011
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|
407 |
|
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Revision: 201011
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|
408 |
/*! |
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Revision: 201011
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|
409 |
\fn QMediaObject::availabilityChanged(bool available) |
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Revision: 201011
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|
410 |
|
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Revision: 201011
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|
411 |
Signal emitted when the availability state has changed to \a available |
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Revision: 201011
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412 |
*/ |
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Revision: 201011
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|
413 |
|
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#include "moc_qmediaobject.cpp" |
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QT_END_NAMESPACE |
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