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39 
40 #ifndef QGESTURERECOGNIZER_H
41 #define QGESTURERECOGNIZER_H
42 
43 #include <QtWidgets/qtwidgetsglobal.h>
44 #include <QtCore/qnamespace.h>
45 
46 #ifndef QT_NO_GESTURES
47 
48 QT_BEGIN_NAMESPACE
49 
50 
51 class QObject;
52 class QEvent;
53 class QGesture;
54 class Q_WIDGETS_EXPORT QGestureRecognizer
55 {
56 public:
57     enum ResultFlag
58     {
59         Ignore           = 0x0001,
60 
61         MayBeGesture     = 0x0002,
62         TriggerGesture   = 0x0004,
63         FinishGesture    = 0x0008,
64         CancelGesture    = 0x0010,
65 
66         ResultState_Mask = 0x00ff,
67 
68         ConsumeEventHint        = 0x0100,
69         // StoreEventHint          = 0x0200,
70         // ReplayStoredEventsHint  = 0x0400,
71         // DiscardStoredEventsHint = 0x0800,
72 
73         ResultHint_Mask = 0xff00
74     };
75     Q_DECLARE_FLAGS(Result, ResultFlag)
76 
77     QGestureRecognizer();
78     virtual ~QGestureRecognizer();
79 
80     virtual QGesture *create(QObject *target);
81     virtual Result recognize(QGesture *state, QObject *watched,
82                              QEvent *event) = 0;
83     virtual void reset(QGesture *state);
84 
85     static Qt::GestureType registerRecognizer(QGestureRecognizer *recognizer);
86     static void unregisterRecognizer(Qt::GestureType type);
87 };
88 
89 Q_DECLARE_OPERATORS_FOR_FLAGS(QGestureRecognizer::Result)
90 
91 QT_END_NAMESPACE
92 
93 #endif // QT_NO_GESTURES
94 
95 #endif // QGESTURERECOGNIZER_H
96