1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** 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 "qtwistsensorgesturerecognizer.h"
#define _USE_MATH_DEFINES
#include <QtCore/qmath.h>
#ifndef M_PI
#define M_PI 3.14159265358979323846264338327950288419717
#endif
#ifndef M_PI_2
#define M_PI_2 1.57079632679489661923
#endif
QT_BEGIN_NAMESPACE
// from qsensor2tilt
inline qreal calcPitch(double Ax, double Ay, double Az)
{
return (float)-atan2(Ax, sqrt(Ay * Ay + Az * Az));
}
inline qreal calcRoll(double Ax, double Ay, double Az)
{
return (float)atan2(Ay, (sqrt(Ax * Ax + Az * Az)));
}
QTwistSensorGestureRecognizer::QTwistSensorGestureRecognizer(QObject *parent) :
QSensorGestureRecognizer(parent), detecting(0)
{
}
QTwistSensorGestureRecognizer::~QTwistSensorGestureRecognizer()
{
}
void QTwistSensorGestureRecognizer::create()
{
accel = new QAccelerometer(this);
accel->connectToBackend();
timer = new QTimer(this);
qoutputrangelist outputranges = accel->outputRanges();
if (outputranges.count() > 0)
accelRange = (int)(outputranges.at(0).maximum *2);
else
accelRange = 44; //this should never happen
connect(timer,SIGNAL(timeout()),this,SLOT(timeout()));
timer->setSingleShot(true);
timer->setInterval(250);
}
QString QTwistSensorGestureRecognizer::id() const
{
return QString("QtSensors.twist");
}
bool QTwistSensorGestureRecognizer::start()
{
connect(accel,SIGNAL(readingChanged()),this,SLOT(accelChanged()));
active = accel->start();
return active;
}
bool QTwistSensorGestureRecognizer::stop()
{
accel->stop();
disconnect(accel,SIGNAL(readingChanged()),this,SLOT(accelChanged()));
active = accel->isActive();
return !active;
}
bool QTwistSensorGestureRecognizer::isActive()
{
return active;
}
#define RESTING_VARIANCE 10
void QTwistSensorGestureRecognizer::accelChanged()
{
qreal x = accel->reading()->x();
qreal y = accel->reading()->y();
qreal z = accel->reading()->z();
pitch = calcPitch(x, y, z);
roll = calcRoll(x, y, z);
qreal degrees = calc(pitch);
if (xList.count() > 4) {
if (detecting && abs(degrees) < RESTING_VARIANCE) {
if (lastX < 0) {
Q_EMIT twistLeft();
Q_EMIT detected("twistLeft");
} else {
Q_EMIT twistRight();
Q_EMIT detected("twistRight");
}
detecting = false;
}
if (abs(degrees) > 60 && abs(xList.last()) < RESTING_VARIANCE) {
detecting = true;
timer->start();
lastX = degrees;
}
}
if (xList.count() > 5)
xList.removeLast();
xList.insert(0,degrees);
}
void QTwistSensorGestureRecognizer::timeout()
{
detecting = false;
}
qreal QTwistSensorGestureRecognizer::calc(qreal yrot)
{
qreal aG = 1 * sin(yrot);
qreal aK = 1 * cos(yrot);
yrot = atan2(aG, aK);
if (yrot > M_PI_2)
yrot = M_PI - yrot;
else if (yrot < -M_PI_2)
yrot = -(M_PI + yrot);
return yrot * 180 / M_PI;
}
QT_END_NAMESPACE
|
