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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the examples of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore>
#include <qaccelerometer.h>
QTM_USE_NAMESPACE
namespace arrows{
static const QString ARROW_UP="^", ARROW_DOWN="v", ARROW_LEFT="<",ARROW_RIGHT=">";
}
namespace orientation{
static const QString LANDSCAPE="landscape", PORTRAIT="portrait";
}
class AccelerometerFilter : public QAccelerometerFilter
{
public:
bool filter(QAccelerometerReading *reading)
{
QString arrow = getArrowKey(reading->x(), reading->y());
if (arrow!=exArrow){
qDebug() << "direction:" << arrow;
exArrow = arrow;
}
return false; // don't store the reading in the sensor
}
private:
QString exArrow;
QString getArrowKey(qreal x, qreal y){
// axis_x: LEFT or RIGHT
if (abs(x)>abs(y)) return x>0?(arrows::ARROW_LEFT):(arrows::ARROW_RIGHT);
// axis_y: UP or DOWN
return y>0?(arrows::ARROW_DOWN):(arrows::ARROW_UP);
}
static qreal abs(qreal value) {return value<0?-value:value;}
};
int main(int argc, char **argv)
{
QCoreApplication app(argc, argv);
QAccelerometer sensor;
if (!sensor.connectToBackend()) {
qWarning("No Accelerometer available!");
return EXIT_FAILURE;
}
const char* alwaysOn = "alwaysOn";
sensor.setProperty(alwaysOn, true);
AccelerometerFilter filter;
sensor.addFilter(&filter);
qrangelist datarates = sensor.availableDataRates();
int i = datarates.size();
if (i>0) sensor.setDataRate(datarates.at(i-1).second);
sensor.start();
return app.exec();
}
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