qtmobility/src/multimedia/qmediacontrol.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 23 Jun 2010 19:08:38 +0300
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Revision: 201023 Kit: 2010125
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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 <QtCore/qtimer.h>
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#include "qmediacontrol.h"
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#include "qmediacontrol_p.h"
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QT_BEGIN_NAMESPACE
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/*!
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    \class QMediaControl
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    \ingroup multimedia
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    \preliminary
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    \brief The QMediaControl class provides a base interface for media service controls.
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    Media controls provide an interface to individual features provided by a
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    media service.  Most services implement a principal control which exposes
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    the core functionality of the service and a number optional controls which
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    expose any additional functionality.
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    A pointer to a control implemented by a media service can be obtained using
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    the \l {QMediaService::requestControl()} member of QMediaService.  If the
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    service doesn't implement a control it will instead return a null pointer.
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    \code
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    QMediaPlayerControl *control = qobject_cast<QMediaPlayerControl *>(
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            service->requestControl("com.nokia.Qt.QMediaPlayerControl/1.0"));
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    \endcode
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    Alternatively if the IId of the control has been declared using
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    Q_MEDIA_DECLARE_CONTROL the template version of
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    QMediaService::requestControl() can be used to request the service without
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    explicitly passing the IId.
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    \code
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    QMediaPlayerControl *control = service->requestControl<QMediaPlayerControl *>();
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    \endcode
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    Most application code will not interface directly with a media service's
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    controls, instead the QMediaObject which owns the service acts as an
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    intermediary between one or more controls and the application.
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    \sa QMediaService, QMediaObject
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*/
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/*!
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    \macro Q_MEDIA_DECLARE_CONTROL(Class, IId)
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    \relates QMediaControl
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    The Q_MEDIA_DECLARE_CONTROL macro declares an \a IId for a \a Class that
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    inherits from QMediaControl.
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    Declaring an IId for a QMediaControl allows an instance of that control to
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    be requested from QMediaService::requestControl() without explicitly
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    passing the IId.
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    \code
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    QMediaPlayerControl *control = service->control<QMediaPlayerControl *>();
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    \endcode
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    \sa QMediaService::requestControl()
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*/
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/*!
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    Destroys a media control.
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*/
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QMediaControl::~QMediaControl()
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{
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    delete d_ptr;
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}
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/*!
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    Constructs a media control with the given \a parent.
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*/
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QMediaControl::QMediaControl(QObject *parent)
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    : QObject(parent)
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    , d_ptr(new QMediaControlPrivate)
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{
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    d_ptr->q_ptr = this;
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}
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/*!
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    \internal
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*/
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QMediaControl::QMediaControl(QMediaControlPrivate &dd, QObject *parent)
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    : QObject(parent)
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    , d_ptr(&dd)
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{
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    d_ptr->q_ptr = this;
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}
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#include "moc_qmediacontrol.cpp"
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QT_END_NAMESPACE
1
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