Expose availability from the backend to C++ and QML.

The availabilityError property was static based on the service, but it
can change at run time, so add the plumbing to allow the backend to
report it itself.

Also make sure that both QML and C++ expose the availability.

The radio tuner and data controls previously had properties (but no
signals) for availability - these have been removed.

Change-Id: I9240cf93e2a51b14cd38642f9312ae3c75f05361
Reviewed-by: Ling Hu <ling.hu@nokia.com>

1 files changed, 109 insertions, 0 deletions

diff --git a/src/multimedia/controls/qmediaavailabilitycontrol.cpp b/src/multimedia/controls/qmediaavailabilitycontrol.cpp
new file mode 100644
index 000000000..76f615049
--- /dev/null
+++ b/src/multimedia/controls/qmediaavailabilitycontrol.cpp
@@ -0,0 +1,109 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qmediaavailabilitycontrol.h"
+#include "qmediacontrol_p.h"
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class QMediaAvailabilityControl
+
+    \brief The QMediaAvailabilityControl class supplies a control for reporting availability of a service.
+
+    \inmodule QtMultimedia
+
+    \ingroup multimedia
+    \ingroup multimedia_control
+
+    An instance of QMediaObject (or its derived classes) can report any changes
+    in availability via this control.
+
+    The interface name of QMediaAvailabilityControl is \c com.nokia.Qt.QMediaAvailabilityControl/1.0 as
+    defined in QMediaAvailabilityControl_iid.
+
+    \sa QMediaService::requestControl(), QMediaObject
+*/
+
+/*!
+    \macro QMediaAvailabilityControl_iid
+
+    \c com.nokia.Qt.QMediaAvailabilityControl/1.0
+
+    Defines the interface name of the QMediaAvailabilityControl class.
+
+    \relates QMediaAvailabilityControl
+*/
+
+/*!
+    Constructs an availability control object with \a parent.
+*/
+QMediaAvailabilityControl::QMediaAvailabilityControl(QObject *parent)
+    : QMediaControl(*new QMediaControlPrivate, parent)
+{
+}
+
+/*!
+    Destruct the availability control object.
+*/
+QMediaAvailabilityControl::~QMediaAvailabilityControl()
+{
+}
+
+
+/*!
+  \fn QtMultimedia::AvailabilityError QMediaAvailabilityControl::availability() const
+
+  Returns the current availability of this instance of the media service.
+  If the availability changes at run time (for example, some other media
+  client takes all media resources) the availabilityChanges() signal
+  should be emitted.
+*/
+
+
+/*!
+    \fn void QMediaAvailabilityControl::availabilityChanged(QtMultimedia::AvailabilityError availability)
+
+    Signal emitted when the current \a availability value changed.
+*/
+
+#include "moc_qmediaavailabilitycontrol.cpp"
+QT_END_NAMESPACE