116 lines
2.5 KiB
C++
116 lines
2.5 KiB
C++
/*
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* Copyright (C) 2006 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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#include "datasource.h"
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#include <QAtomic>
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#include <QVariant>
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#include <KDebug>
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namespace Plasma
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{
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class DataSource::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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DataEngine::Data data;
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QAtomic connectCount;
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bool dirty : 1;
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};
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DataSource::DataSource(QObject* parent)
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: QObject(parent),
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d(new Private())
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{
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}
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DataSource::~DataSource()
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{
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delete d;
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}
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const DataEngine::Data DataSource::data() const
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{
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return d->data;
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}
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void DataSource::setData(const QString& key, const QVariant& value)
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{
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if (value.isNull() || !value.isValid()) {
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if (!d->data.contains(key)) {
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return;
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}
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d->data.remove(key);
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} else {
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d->data[key] = value;
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}
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d->dirty = true;
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}
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void DataSource::clearData()
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{
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if (d->data.count() < 1) {
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// avoid an update if we don't have any data anyways
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return;
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}
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d->data.clear();
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d->dirty = true;
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}
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void DataSource::checkForUpdate()
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{
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if (d->dirty) {
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emit updated(objectName(), d->data);
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d->dirty = false;
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}
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}
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void DataSource::connectNotify(const char *signal)
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{
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if (QLatin1String(signal) == QMetaObject::normalizedSignature(SIGNAL(updated(QString, Plasma::DataEngine::Data))).constData()) {
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d->connectCount.ref();
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}
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}
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void DataSource::disconnectNotify(const char *signal)
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{
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if (QLatin1String(signal) == QMetaObject::normalizedSignature(SIGNAL(updated(QString, Plasma::DataEngine::Data))).constData()) {
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if (d->connectCount > 0) {
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d->connectCount.deref();
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}
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if (d->connectCount < 1) {
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// DO NOT CALL ANYTHING AFTER THIS LINE AS IT MAY GET DELETED!
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emit unused(objectName());
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}
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}
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}
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} // Plasma namespace
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#include "datasource.moc"
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