include/QtWidgets/qgesturerecognizer.h

0001 // Copyright (C) 2016 The Qt Company Ltd.
0002 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
0003
0004 #ifndef QGESTURERECOGNIZER_H
0005 #define QGESTURERECOGNIZER_H
0006
0007 #include <QtWidgets/qtwidgetsglobal.h>
0008 #include <QtCore/qnamespace.h>
0009
0010 #ifndef QT_NO_GESTURES
0011
0012 QT_BEGIN_NAMESPACE
0013
0014
0015 class QObject;
0016 class QEvent;
0017 class QGesture;
0018 class Q_WIDGETS_EXPORT QGestureRecognizer
0019 {
0020 public:
0021     enum ResultFlag
0022     {
0023         Ignore           = 0x0001,
0024
0025         MayBeGesture     = 0x0002,
0026         TriggerGesture   = 0x0004,
0027         FinishGesture    = 0x0008,
0028         CancelGesture    = 0x0010,
0029
0030         ResultState_Mask = 0x00ff,
0031
0032         ConsumeEventHint        = 0x0100,
0033         // StoreEventHint          = 0x0200,
0034         // ReplayStoredEventsHint  = 0x0400,
0035         // DiscardStoredEventsHint = 0x0800,
0036
0037         ResultHint_Mask = 0xff00
0038     };
0039     Q_DECLARE_FLAGS(Result, ResultFlag)
0040
0041     QGestureRecognizer();
0042     virtual ~QGestureRecognizer();
0043
0044     virtual QGesture *create(QObject *target);
0045     virtual Result recognize(QGesture *state, QObject *watched,
0046                              QEvent *event) = 0;
0047     virtual void reset(QGesture *state);
0048
0049     static Qt::GestureType registerRecognizer(QGestureRecognizer *recognizer);
0050     static void unregisterRecognizer(Qt::GestureType type);
0051 };
0052
0053 Q_DECLARE_OPERATORS_FOR_FLAGS(QGestureRecognizer::Result)
0054
0055 QT_END_NAMESPACE
0056
0057 #endif // QT_NO_GESTURES
0058
0059 #endif // QGESTURERECOGNIZER_H