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/*****************************************************************************
* Copyright (C) 2009-2010 by Peter Penz <[email protected]> *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License version 2 as published by the Free Software Foundation. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Library General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public License *
* along with this library; see the file COPYING.LIB. If not, write to *
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, *
* Boston, MA 02110-1301, USA. *
*****************************************************************************/
#ifndef KLOADMETADATATHREAD_H
#define KLOADMETADATATHREAD_H
#define DISABLE_NEPOMUK_LEGACY
#include <nepomuk/property.h>
#include <nepomuk/tag.h>
#include <nepomuk/variant.h>
#include <kurl.h>
#include <QList>
#include <QThread>
class KMetaDataModel;
/**
* Loads the meta data of files that are
* required by the widget KMetaDataWidget.
*/
class KLoadMetaDataThread : public QThread
{
Q_OBJECT
public:
KLoadMetaDataThread(KMetaDataModel* model);
virtual ~KLoadMetaDataThread();
/**
* Starts the thread and loads the meta data for
* the files given by \p urls. After receiving
* the signal finished(), the method KLoadMetaDataThread::data()
* provides the loaded meta data.
*/
void load(const KUrl::List& urls);
/**
* Returns the meta data for the URLs given
* by KLoadMetaDataThread::load(). The method only provides
* valid results after the signal finished() has been
* emitted.
*/
QHash<KUrl, Nepomuk::Variant> data() const;
/**
* Tells the thread that it should cancel as soon
* as possible. It is undefined when the thread
* gets cancelled. The signal finished() will emitted
* after the cancelling has been done.mergedIt
*/
void cancel();
/**
* Cancels the thread and assures that the thread deletes
* itself as soon as the cancelling has been successful. In
* opposite to QThread::wait() the caller of cancelAndDelete()
* will not be blocked.
*/
void cancelAndDelete();
/** @see QThread::run() */
virtual void run();
private slots:
void slotFinished();
private:
/**
* Temporary helper method until there is a proper formatting facility in Nepomuk.
* Here we simply handle the most common formatting situations that do not look nice
* when using Nepomuk::Variant::toString().
*/
QString formatValue(const Nepomuk::Variant& value);
private:
KMetaDataModel* m_model;
QHash<KUrl, Nepomuk::Variant> m_data;
KUrl::List m_urls;
bool m_canceled;
};
#endif
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