diff -r cfcbf08528c4 -r 2b40d63a9c3d qtmobility/examples/sensors/grueplugin/gruesensorimpl.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/qtmobility/examples/sensors/grueplugin/gruesensorimpl.cpp	Fri Apr 16 15:51:22 2010 +0300
@@ -0,0 +1,102 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "gruesensorimpl.h"
+#include <QDebug>
+
+const char *gruesensorimpl::id("grue.gruesensor");
+
+gruesensorimpl::gruesensorimpl(QSensor *sensor)
+    : QSensorBackend(sensor)
+{
+    lightSensor = new QAmbientLightSensor(this);
+    lightSensor->setUpdatePolicy(QSensor::OccasionalUpdates);
+    lightSensor->addFilter(this);
+
+    setSupportedUpdatePolicies(QSensor::OnChangeUpdates | QSensor::OccasionalUpdates);
+    setReading<GrueSensorReading>(&m_reading);
+}
+
+void gruesensorimpl::start()
+{
+    lightSensor->start();
+}
+
+void gruesensorimpl::stop()
+{
+    lightSensor->stop();
+}
+
+void gruesensorimpl::poll()
+{
+    lightSensor->poll();
+}
+
+bool gruesensorimpl::filter(QAmbientLightReading *reading)
+{
+    qreal chance;
+
+    switch (reading->lightLevel()) {
+    case QAmbientLightReading::Undefined:
+        chance = 0.5; // No idea... call it 50/50
+        break;
+    case QAmbientLightReading::Dark:
+        chance = 1.0;
+        break;
+    case QAmbientLightReading::Twilight:
+        chance = 0.1;
+        break;
+    default:
+        chance = 0.0;
+        break;
+    }
+
+    if (QSensorBackend::m_sensor->updatePolicy() == QSensor::OccasionalUpdates ||
+            chance != m_reading.chanceOfBeingEaten()) {
+        m_reading.setTimestamp(reading->timestamp());
+        m_reading.setChanceOfBeingEaten(chance);
+
+        newReadingAvailable();
+    }
+
+    return true;
+}
+