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diff --git a/src/sources/ibookg4thermalsrc.h b/src/sources/ibookg4thermalsrc.h
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+/***************************************************************************
+ *   Copyright (C) 2006 by                                                 *
+ *   Flavio Castelli, micron@madlab.it                                     *
+ *   Ken Werner, ken.werner@web.de                                         *
+ *                                                                         *
+ *   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 IBOOKG4THERMALSRC_H
+#define IBOOKG4THERMALSRC_H
+#include "labelsource.h"
+#include "threadedtrigger.h"
+#include <qfile.h>
+#include <list>
+
+/**
+ * @author Flavio Castelli
+ * @author Ken Werner
+ * IbookG4ThermalSrc reads temperature values from /sys/devices/temperatures/sensor[1,2]_temperature
+ * It may work on other Apple machines as well (please let me know)
+ */
+class IbookG4ThermalSrc : public LabelSource {
+	Q_OBJECT //macro which activates signals and slots (moc)
+public:
+	/**
+	 * Creates a new Source from the given File
+	 */
+	IbookG4ThermalSrc(QWidget* inParent, const QFile& inSourceFile, const QString& inName);
+	virtual ~IbookG4ThermalSrc();
+	
+	/**
+	 * Creates instances of that Source (and returns pointers to them)
+	 */
+	static std::list<Source*> createInstances(QWidget* inParent);
+
+	/**
+	 * Fetches and returns the value of this source
+	 * This method is called from a thread so don't call it directly
+	 */
+	virtual QString fetchValue();
+
+private:
+	/**
+	 * The file from which the value is read
+	 */
+	QFile mSourceFile;
+
+	/**
+	 * triggers the fetchValue method
+	 */
+	ThreadedTrigger mTrigger;
+};
+#endif // IBOOKG4THERMALSRC_H