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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtSystems module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qdeclarativevaluespacesubscriber_p.h"
QT_BEGIN_NAMESPACE
/*!
\qmltype ValueSpaceSubscriber
\instantiates QDeclarativeValueSpaceSubscriber
\inqmlmodule QtPublishSubscribe
\ingroup qml-publishsubscribe
\brief The QValueSpaceSubscriber class allows applications to read and subscribe to Value Space.
Each \l ValueSpaceSubscriber element represents a single value or path in the Value Space. The
path is set using the \e path property.
Note that unlike the C++ class QValueSpaceSubscriber, the QML element has no default path. A path
must be set before the subscriber will connect to the Value Space and begin receiving notifications.
\code
ValueSpaceSubscriber {
id: nowPlaying
path: "/applications/mediaplayer/now-playing"
}
\endcode
The value is accessed using the \e value property:
\code
Text {
text: nowPlaying.value
}
\endcode
*/
QDeclarativeValueSpaceSubscriber::QDeclarativeValueSpaceSubscriber()
: d_ptr(0)
{
}
QDeclarativeValueSpaceSubscriber::~QDeclarativeValueSpaceSubscriber()
{
}
/*!
\qmlproperty string ValueSpaceSubscriber::path
This property holds the base path of the subscriber, and it should be set before connecting to
any Value Space layers and receiving notifications.
*/
void QDeclarativeValueSpaceSubscriber::setPath(QString path)
{
if (!d_ptr) {
d_ptr = new QValueSpaceSubscriber(path, this);
connect(d_ptr, SIGNAL(contentsChanged()), this, SIGNAL(contentsChanged()));
} else {
d_ptr->setPath(path);
emit pathChanged();
}
}
QString QDeclarativeValueSpaceSubscriber::path() const
{
if (d_ptr)
return d_ptr->path();
else
return QString();
}
/*!
\qmlproperty QVariant ValueSpaceSubscriber::value
This property holds the value of the key at the set path in the Value Space.
Read-only.
*/
QVariant QDeclarativeValueSpaceSubscriber::value(const QString &subPath, const QVariant &def) const
{
if (d_ptr)
return d_ptr->value(subPath, def);
else
return QVariant();
}
/*!
\qmlproperty QStringList ValueSpaceSubscriber::subPaths
This property holds a list of known sub-paths of the currently set path.
*/
QStringList QDeclarativeValueSpaceSubscriber::subPaths() const
{
if (d_ptr)
return d_ptr->subPaths();
else
return QStringList();
}
/*!
\qmlproperty bool ValueSpaceSubscriber::connected
This property holds whether the subscriber is currently connected to the
backing store of the Value Space.
*/
bool QDeclarativeValueSpaceSubscriber::isConnected() const
{
if (d_ptr)
return d_ptr->isConnected();
else
return false;
}
QT_END_NAMESPACE
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