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39 
40 
41 #ifndef QWFLICKSENSORGESTURERECOGNIZER_H
42 #define QWFLICKSENSORGESTURERECOGNIZER_H
43 
44 #include <QtSensors/qsensorgesturerecognizer.h>
45 #include <QtSensors/QAccelerometer>
46 #include <QtSensors/QOrientationSensor>
47 #include "qtsensorgesturesensorhandler.h"
48 
49 QT_BEGIN_NAMESPACE
50 
51 struct twistAccelData {
52     qreal x;
53     qreal y;
54     qreal z;
55 };
56 
57 class QTwistSensorGestureRecognizer : public QSensorGestureRecognizer
58 {
59     Q_OBJECT
60 public:
61     explicit QTwistSensorGestureRecognizer(QObject *parent = 0);
62     ~QTwistSensorGestureRecognizer();
63 
64     void create() override;
65 
66     QString id() const override;
67     bool start() override;
68     bool stop() override;
69     bool isActive() override;
70 
71 Q_SIGNALS:
72     void twistLeft();
73     void twistRight();
74 
75 private slots:
76     void accelChanged(QAccelerometerReading *reading);
77     void orientationReadingChanged(QOrientationReading *reading);
78     void checkTwist();
79 
80 private:
81 
82     QOrientationReading *orientationReading;
83     bool active;
84     bool detecting;
85     QList <twistAccelData> dataList;
86     bool checking;
87     void reset();
88     bool checkOrientation();
89     int increaseCount;
90     int decreaseCount;
91     qreal lastAngle;
92     QList <QOrientationReading::Orientation> orientationList;
93     qreal detectedAngle;
94 };
95 QT_END_NAMESPACE
96 #endif // QWFLICKSENSORGESTURERECOGNIZER_H
97