71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
/*
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SPDX-FileCopyrightText: 2011 Aaron Seigo <aseigo@kde.org>
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SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <QDebug>
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#include <QUrl>
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#include "customDataContainersEngine.h"
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#include "httpContainer.h"
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/*
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This DataEngine shows how to use a subclass of DataContainer to create and
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manage sources. This is particularly useful when managing asynchronous requests,
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such as sources that reflect network, D-Bus, etc. results.
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*/
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DataContainersEngine::DataContainersEngine(QObject *parent, const QVariantList &args)
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: Plasma::DataEngine(parent, args)
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{
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// We've passed the constructor's args to our parent class.
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// We're done for now!
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}
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bool DataContainersEngine::sourceRequestEvent(const QString &source)
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{
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// This engine will fetch webpages over http. First thing we do is check
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// the source to make sure it is indeed an http URL.
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QUrl url(source);
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qDebug() << "going to fetch" << source << url << url.scheme();
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if (!url.scheme().startsWith(QLatin1String("http"), Qt::CaseInsensitive)) {
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return false;
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}
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// Create a HttpContainer, which is a subclass of Plasma::DataContainer
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HttpContainer *container = new HttpContainer(url, this);
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// Set the object name to be the same as the source name; DataEngine
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// relies on this to identify the container. This could also be done
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// in HttpContainer's constructor, but for the sake of this example
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// we're dong it here to show that it must be done *before* the
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// DataContainer subclass is passed to addSource
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container->setObjectName(source);
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// Now we tell Plasma::DataEngine about this new container
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addSource(container);
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// Since we successfully set up the source, return true
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return true;
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}
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bool DataContainersEngine::updateSourceEvent(const QString &source)
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{
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HttpContainer *container = qobject_cast<HttpContainer *>(containerForSource(source));
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if (container) {
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container->fetchUrl();
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}
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// HttpContainer is asynchronous, so the data hasn't actually been updated yet. So
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// we return false here to let the DataEngine know that nothing has changed quite yet.
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return false;
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}
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// export the plugin; use the plugin name and the class name
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K_PLUGIN_CLASS_WITH_JSON(DataContainersEngine, "plasma-dataengine-example-customDataContainers.json")
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// include the moc file so the build system makes it for us
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#include "customDataContainersEngine.moc"
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