queries.h 1.8 KB
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/*
 * ark -- archiver for the KDE project
 *
 * Copyright (C) 2008 Harald Hvaal <haraldhv (at@at) stud.ntnu.no>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 */

#ifndef _QUERIES_H_
#define _QUERIES_H_

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#include "kerfuffle_export.h"

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#include <QString>
#include <QHash>
#include <QWaitCondition>
#include <QMutex>
#include <QVariant>

namespace Kerfuffle
{

	typedef QHash<QString, QVariant> QueryData;

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	class KERFUFFLE_EXPORT Query
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	{

		public:
			/**
			 * Execute the response. Will happen in the GUI thread, so it's
			 * safe to use widgets/gui elements here. Must call setResponse
			 * when done.
			 */
			virtual void execute() = 0;

			/**
			 * Will block until the response have been set
			 */
			void waitForResponse();

			QVariant response();

		protected:
			/**
			 * Protected constructor
			 */
			Query();
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			virtual ~Query() {}
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			void setResponse(QVariant response);

			QueryData m_data;

		private:
			QWaitCondition m_responseCondition;
			QMutex m_responseMutex;


	};

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	class KERFUFFLE_EXPORT OverwriteQuery : public Query
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	{
		public:
			OverwriteQuery(QString filename);
			void execute();
	};

}

#endif /* ifndef _QUERIES_H_ */