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     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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    40 ****************************************************************************/

    41 

    42 #include "gruesensorimpl.h"

    43 #include <QDebug>

    44 

    45 const char *gruesensorimpl::id("grue.gruesensor");

    46 

    47 gruesensorimpl::gruesensorimpl(QSensor *sensor)

    48     : QSensorBackend(sensor)

    49 {

    50     lightSensor = new QAmbientLightSensor(this);

    51     lightSensor->setUpdatePolicy(QSensor::OccasionalUpdates);

    52     lightSensor->addFilter(this);

    53 

    54     setSupportedUpdatePolicies(QSensor::OnChangeUpdates | QSensor::OccasionalUpdates);

    55     setReading<GrueSensorReading>(&m_reading);

    56 }

    57 

    58 void gruesensorimpl::start()

    59 {

    60     lightSensor->start();

    61 }

    62 

    63 void gruesensorimpl::stop()

    64 {

    65     lightSensor->stop();

    66 }

    67 

    68 void gruesensorimpl::poll()

    69 {

    70     lightSensor->poll();

    71 }

    72 

    73 bool gruesensorimpl::filter(QAmbientLightReading *reading)

    74 {

    75     qreal chance;

    76 

    77     switch (reading->lightLevel()) {

    78     case QAmbientLightReading::Undefined:

    79         chance = 0.5; // No idea... call it 50/50

    80         break;

    81     case QAmbientLightReading::Dark:

    82         chance = 1.0;

    83         break;

    84     case QAmbientLightReading::Twilight:

    85         chance = 0.1;

    86         break;

    87     default:

    88         chance = 0.0;

    89         break;

    90     }

    91 

    92     if (QSensorBackend::m_sensor->updatePolicy() == QSensor::OccasionalUpdates ||

    93             chance != m_reading.chanceOfBeingEaten()) {

    94         m_reading.setTimestamp(reading->timestamp());

    95         m_reading.setChanceOfBeingEaten(chance);

    96 

    97         newReadingAvailable();

    98     }

    99 

   100     return true;

   101 }

   102