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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

    14 ** met:

    15 **   * Redistributions of source code must retain the above copyright

    16 **     notice, this list of conditions and the following disclaimer.

    17 **   * Redistributions in binary form must reproduce the above copyright

    18 **     notice, this list of conditions and the following disclaimer in

    19 **     the documentation and/or other materials provided with the

    20 **     distribution.

    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

    24 **     permission.

    25 **

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

    27 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

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    29 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

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    33 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

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    36 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."

    37 ** $QT_END_LICENSE$

    38 **

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

    40 

    41 #include <QtCore>

    42 #include <qcompass.h>

    43 

    44 QTM_USE_NAMESPACE

    45 

    46 class CompassFilter : public QCompassFilter

    47 {

    48 public:

    49     bool filter(QCompassReading *reading)

    50     {

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

    52         stamp = reading->timestamp();

    53         QTextStream out(stdout);

    54         out << QString("Compass heading: %1").arg(reading->azimuth(), 3, 'f', 0)

    55             << QString(" calibration: %1").arg(reading->calibrationLevel(), 3, 'f', 1)

    56             << QString(" (%1 ms since last, %2 Hz)").arg(diff / 1000, 4).arg( 1000000.0 / diff, 4, 'f', 1) << endl;

    57         return true;

    58     }

    59 private:

    60     qtimestamp stamp;

    61 };

    62 

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

    64 {

    65     QCoreApplication app(argc, argv);

    66 

    67     QCompass sensor;

    68     if (!sensor.connectToBackend()) {

    69         qWarning("No compass available!");

    70         return 1;

    71     }

    72     CompassFilter filter;

    73     sensor.addFilter(&filter);

    74     sensor.start();

    75     if (!sensor.isActive()) {

    76         qWarning("Compasssensor didn't start!");

    77         return 1;

    78     }

    79     return app.exec();

    80 }