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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtSensors module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qwhipsensorgesturerecognizer.h"
#include "qtsensorgesturesensorhandler.h"
#include <QtCore/qmath.h>
QT_BEGIN_NAMESPACE
QWhipSensorGestureRecognizer::QWhipSensorGestureRecognizer(QObject *parent) :
QSensorGestureRecognizer(parent), orientationReading(0), whipIt(0), lastX(0),
detectedX(0), active(0)
{
}
QWhipSensorGestureRecognizer::~QWhipSensorGestureRecognizer()
{
}
void QWhipSensorGestureRecognizer::create()
{
timer = new QTimer(this);
connect(timer,SIGNAL(timeout()),this,SLOT(timeout()));
timer->setSingleShot(true);
timer->setInterval(750);
}
QString QWhipSensorGestureRecognizer::id() const
{
return QString("QtSensors.whip");
}
bool QWhipSensorGestureRecognizer::start()
{
if (QtSensorGestureSensorHandler::instance()->startSensor(QtSensorGestureSensorHandler::Accel)) {
if (QtSensorGestureSensorHandler::instance()->startSensor(QtSensorGestureSensorHandler::Orientation)) {
accelRange = QtSensorGestureSensorHandler::instance()->accelRange;
active = true;
connect(QtSensorGestureSensorHandler::instance(),SIGNAL(orientationReadingChanged(QOrientationReading *)),
this,SLOT(orientationReadingChanged(QOrientationReading *)));
connect(QtSensorGestureSensorHandler::instance(),SIGNAL(accelReadingChanged(QAccelerometerReading *)),
this,SLOT(accelChanged(QAccelerometerReading *)));
} else {
QtSensorGestureSensorHandler::instance()->stopSensor(QtSensorGestureSensorHandler::Accel);
active = false;
}
} else {
active = false;
}
return active;
}
bool QWhipSensorGestureRecognizer::stop()
{
QtSensorGestureSensorHandler::instance()->stopSensor(QtSensorGestureSensorHandler::Accel);
QtSensorGestureSensorHandler::instance()->stopSensor(QtSensorGestureSensorHandler::Orientation);
disconnect(QtSensorGestureSensorHandler::instance(),SIGNAL(orientationReadingChanged(QOrientationReading *)),
this,SLOT(orientationReadingChanged(QOrientationReading *)));
disconnect(QtSensorGestureSensorHandler::instance(),SIGNAL(accelReadingChanged(QAccelerometerReading *)),
this,SLOT(accelChanged(QAccelerometerReading *)));
active = false;
return active;
}
bool QWhipSensorGestureRecognizer::isActive()
{
return active;
}
#define WHIP_THRESHOLD_FACTOR 0.85 //37
#define WHIP_DETECTION_FACTOR 0.15 // 5.85
#define WHIP_DEGREES 25
#define WHIP_Y_DEGREES 15
#define WHIP_DEGREES_BELOW
#define RADIANS_TO_DEGREES 57.2957795
void QWhipSensorGestureRecognizer::orientationReadingChanged(QOrientationReading *reading)
{
orientationReading = reading;
}
void QWhipSensorGestureRecognizer::accelChanged(QAccelerometerReading *reading)
{
qreal x = reading->x();
qreal difference = lastX - x;
if (qAbs(difference) < 1)
return;
if (orientationReading == 0)
return;
qreal y = reading->y();
qreal z = reading->z();
qreal roll = qAtan(x / qSqrt(y*y + z*z)) * RADIANS_TO_DEGREES;
if (whipIt) {
if (/*orientationReading->orientation() == QOrientationReading::TopUp
&& */ roll > WHIP_Y_DEGREES
&& ((!wasNegative && qAbs(detectedX - x) > accelRange * WHIP_THRESHOLD_FACTOR)
|| (wasNegative && detectedX - x > (accelRange * WHIP_THRESHOLD_FACTOR))) ) {
Q_EMIT whip();
Q_EMIT detected("whip");
whipIt = false;
timer->stop();
}
} else if (!timer->isActive()
// && orientationReading->orientation() == QOrientationReading::TopUp
&& roll < WHIP_Y_DEGREES
&& ((difference > accelRange * WHIP_DETECTION_FACTOR)
|| (difference < -accelRange * WHIP_DETECTION_FACTOR))) {
detectedX = x;
// start of gesture
timer->start();
whipIt = true;
if (difference > 0)
wasNegative = false;
else
wasNegative = true;
}
lastX = x;
}
void QWhipSensorGestureRecognizer::timeout()
{
whipIt = false;
}
QT_END_NAMESPACE
|
