1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtSensors module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#ifndef QSHAKERECOGNIZER_H
41#define QSHAKERECOGNIZER_H
42
43
44#include <QtSensors/QSensor>
45#include <QtSensors/QAccelerometer>
46#include <QtSensors/QAccelerometerFilter>
47#include <QDebug>
48#include <QTimer>
49
50#include <QtSensors/qsensorgesturerecognizer.h>
51
52 struct AccelData {
53 qreal x;
54 qreal y;
55 qreal z;
56};
57
58class QShakeSensorGestureRecognizer : public QSensorGestureRecognizer
59{
60 Q_OBJECT
61
62public:
63
64 QShakeSensorGestureRecognizer(QObject *parent = 0);
65 ~QShakeSensorGestureRecognizer();
66
67 void create() override;
68
69 QString id() const override;
70 bool start() override;
71 bool stop() override;
72 bool isActive() override;
73
74 QTimer *timer;
75 int timerTimeout;
76
77Q_SIGNALS:
78 void shake();
79
80private slots:
81 void accelChanged();
82 void timeout();
83private:
84 QAccelerometer *accel;
85 bool active;
86 int accelRange;
87
88 AccelData prevData;
89 AccelData currentData;
90
91 bool checkForShake(AccelData prevSensorData, AccelData currentSensorData, qreal threshold);
92 bool shaking;
93 int shakeCount;
94 int threshold;
95
96};
97
98#endif // QSHAKERECOGNIZER_H
99

source code of qtsensors/src/plugins/sensorgestures/shake/qshakerecognizer.h