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     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the Qt Mobility Components.

     8 **

     9 ** $QT_BEGIN_LICENSE:BSD$

    10 ** You may use this file under the terms of the BSD license as follows:

    11 **

    12 ** "Redistribution and use in source and binary forms, with or without

    13 ** modification, are permitted provided that the following conditions are

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    21 **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor

    22 **     the names of its contributors may be used to endorse or promote

    23 **     products derived from this software without specific prior written

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    26 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

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    37 ** $QT_END_LICENSE$

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    39 ****************************************************************************/

    40 

    41 #include <QtCore>

    42 #include <qambientlightsensor.h>

    43 

    44 QTM_USE_NAMESPACE

    45 

    46 class AmbientLightFilter : public QAmbientLightFilter

    47 {

    48 public:

    49     qtimestamp stamp;

    50     bool filter(QAmbientLightReading *reading)

    51     {

    52         int diff = ( reading->timestamp() - stamp );

    53         stamp = reading->timestamp();

    54         QString output;

    55         switch (reading->lightLevel()) {

    56             case QAmbientLightReading::Dark:      output = "Dark    ";  break;

    57             case QAmbientLightReading::Twilight:  output = "Twilight";  break;

    58             case QAmbientLightReading::Light:     output = "Light   ";  break;

    59             case QAmbientLightReading::Bright:    output = "Bright  ";  break;

    60             case QAmbientLightReading::Sunny:     output = "Sunny   ";  break;

    61             case QAmbientLightReading::Undefined: output = "Undefined"; break;

    62             default: output = "Invalid enum value";

    63         }

    64         QTextStream out(stdout);

    65         out << "Ambient light level: " << output

    66             << QString(" (%1 ms since last, %2 Hz)").arg(diff / 1000, 5).arg( 1000000.0 / diff, 3, 'f', 1) << endl;

    67         return false; // don't store the reading in the sensor

    68     }

    69 };

    70 

    71 int main(int argc, char **argv)

    72 {

    73     QCoreApplication app(argc, argv);

    74     QStringList args = app.arguments();

    75     int rate_place = args.indexOf("-r");

    76     int rate_val = 0;

    77     if (rate_place != -1)

    78         rate_val = args.at(rate_place + 1).toInt();

    79     QAmbientLightSensor sensor;

    80     if (rate_val > 0) {

    81         sensor.setDataRate(rate_val);

    82     }

    83     AmbientLightFilter filter;

    84     sensor.addFilter(&filter);

    85     sensor.start();

    86     if (!sensor.isActive()) {

    87         qWarning("Ambientlightsensor didn't start!");

    88         return 1;

    89     }

    90 

    91     return app.exec();

    92 }