Differential D10972 Diff 29512 lib/mpris2/dbusabstractadaptor.cpp

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lib/mpris2/dbusabstractadaptor.cpp

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		1		/*
		2		Gwenview: an image viewer
		3		Copyright 2018 Friedrich W. H. Kossebau <kossebau@kde.org>
		4
		5		This program is free software; you can redistribute it and/or
		6		modify it under the terms of the GNU General Public License
		7		as published by the Free Software Foundation; either version 2
		8		of the License, or (at your option) any later version.
		9
		10		This program is distributed in the hope that it will be useful,
		11		but WITHOUT ANY WARRANTY; without even the implied warranty of
		12		MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		13		GNU General Public License for more details.
		14
		15		You should have received a copy of the GNU General Public License
		16		along with this program; if not, write to the Free Software
		17		Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
		18		*/
		19
		20		#include "dbusabstractadaptor.h"
		21
		22		// Qt
		23		#include <QMetaClassInfo>
		24		#include <QDBusMessage>
		25		#include <QDBusConnection>
		26
		27		namespace Gwenview
		28		{
		29
		30		DBusAbstractAdaptor::DBusAbstractAdaptor(const QString &objectDBusPath, QObject *parent)
		31		: QDBusAbstractAdaptor(parent)
		32		, mObjectPath(objectDBusPath)
		33		{
		34		Q_ASSERT(!mObjectPath.isEmpty());
		35		}
		36
		37		void DBusAbstractAdaptor::signalPropertyChange(const QString &propertyName, const QVariant &value)
		38		{
		39		const bool firstChange = mChangedProperties.isEmpty();
		40
		41		mChangedProperties.insert(propertyName, value);
		42
		43		if (firstChange) {
		44		// trigger signal emission on next event loop
		45		QMetaObject::invokeMethod(this, "emitPropertiesChangeDBusSignal", Qt::QueuedConnection);
		46		}
		47		}
		48
		49
		50		void DBusAbstractAdaptor::emitPropertiesChangeDBusSignal()
		51		{
		52		if (mChangedProperties.isEmpty()) {
		53		return;
		54		}
		55
		56		const QMetaObject* metaObject = this->metaObject();
		57		const int dBusInterfaceNameIndex = metaObject->indexOfClassInfo("D-Bus Interface");
		58		Q_ASSERT(dBusInterfaceNameIndex >= 0);
		59		const char* dBusInterfaceName = metaObject->classInfo(dBusInterfaceNameIndex).value();
		60
		61		QDBusMessage signalMessage = QDBusMessage::createSignal(mObjectPath,
		62		QStringLiteral("org.freedesktop.DBus.Properties"),
		63		QStringLiteral("PropertiesChanged"));
		64		signalMessage
		65		<< dBusInterfaceName
		66		<< mChangedProperties
		67		<< QStringList();
		68
		69		QDBusConnection::sessionBus().send(signalMessage);
		70
		71		mChangedProperties.clear();
		72		}
		73
		74		}