98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
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/*
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* Copyright 2006-2007 Aaron Seigo <aseigo@kde.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License version 2 as
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* published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef PLASMA_DATACONTAINER_P_H
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#define PLASMA_DATACONTAINER_P_H
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#include <QtCore/QTimerEvent>
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namespace Plasma
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{
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class SignalRelay;
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class DataContainer::Private
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{
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public:
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Private()
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: dirty(false)
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{}
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QObject* signalRelay(const DataContainer* dc, QObject *visualization, uint updateInterval);
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DataEngine::Data data;
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QMap<QObject *, SignalRelay *> relayObjects;
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QMap<uint, SignalRelay *> relays;
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bool dirty : 1;
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};
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class SignalRelay : public QObject
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{
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Q_OBJECT
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public:
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SignalRelay(DataContainer* parent, DataContainer::Private *data, uint ival)
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: QObject(parent),
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dc(parent),
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d(data),
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interval(ival)
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{
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startTimer(interval);
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}
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bool isUnused()
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{
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return receivers(SIGNAL(updated(QString,Plasma::DataEngine::Data))) < 1;
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}
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DataContainer *dc;
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DataContainer::Private *d;
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uint interval;
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signals:
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void updated(const QString&, const Plasma::DataEngine::Data&);
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protected:
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void timerEvent(QTimerEvent *event)
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{
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emit dc->requestUpdate(dc->objectName());
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emit updated(dc->objectName(), d->data);
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event->accept();
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}
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};
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QObject* DataContainer::Private::signalRelay(const DataContainer* dc, QObject *visualization, uint updateInterval)
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{
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QMap<uint, SignalRelay *>::const_iterator relayIt = relays.find(updateInterval);
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SignalRelay *relay = 0;
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if (relayIt == relays.end()) {
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relay = new SignalRelay(const_cast<DataContainer*>(dc), this, updateInterval);
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relays[updateInterval] = relay;
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} else {
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relay = relayIt.value();
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}
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relayObjects[visualization] = relay;
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return relay;
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}
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}
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#endif // multiple inclusion guard
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