| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #ifndef QGESTUREMANAGER_P_H |
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| 5 | #define QGESTUREMANAGER_P_H |
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| 6 | |
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| 7 | // |
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| 8 | // W A R N I N G |
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| 9 | // ------------- |
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| 10 | // |
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| 11 | // This file is not part of the Qt API. It exists for the convenience |
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| 12 | // of other Qt classes. This header file may change from version to |
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| 13 | // version without notice, or even be removed. |
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| 14 | // |
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| 15 | // We mean it. |
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| 16 | // |
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| 17 | |
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| 18 | #include <QtWidgets/private/qtwidgetsglobal_p.h> |
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| 19 | #include "qobject.h" |
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| 20 | #include "qbasictimer.h" |
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| 21 | #include "private/qwidget_p.h" |
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| 22 | #include "qgesturerecognizer.h" |
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| 23 | |
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| 24 | #include <QtCore/qpointer.h> |
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| 25 | |
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| 26 | #ifndef QT_NO_GESTURES |
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| 27 | |
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| 28 | #include <functional> |
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| 29 | |
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| 30 | QT_BEGIN_NAMESPACE |
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| 31 | |
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| 32 | class QBasicTimer; |
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| 33 | class QGraphicsObject; |
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| 34 | class QGestureManager : public QObject |
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| 35 | { |
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| 36 | Q_OBJECT |
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| 37 | public: |
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| 38 | QGestureManager(QObject *parent); |
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| 39 | ~QGestureManager(); |
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| 40 | |
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| 41 | Qt::GestureType registerGestureRecognizer(QGestureRecognizer *recognizer); |
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| 42 | void unregisterGestureRecognizer(Qt::GestureType type); |
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| 43 | |
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| 44 | bool filterEvent(QWidget *receiver, QEvent *event); |
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| 45 | bool filterEvent(QObject *receiver, QEvent *event); |
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| 46 | #if QT_CONFIG(graphicsview) |
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| 47 | bool filterEvent(QGraphicsObject *receiver, QEvent *event); |
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| 48 | #endif // QT_CONFIG(graphicsview) |
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| 49 | |
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| 50 | enum InstanceCreation { ForceCreation, DontForceCreation }; |
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| 51 | |
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| 52 | static QGestureManager *instance(InstanceCreation ic = ForceCreation); // declared in qapplication.cpp |
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| 53 | static bool gesturePending(QObject *o); |
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| 54 | |
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| 55 | void cleanupCachedGestures(QObject *target, Qt::GestureType type); |
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| 56 | |
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| 57 | void recycle(QGesture *gesture); |
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| 58 | |
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| 59 | protected: |
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| 60 | bool filterEventThroughContexts(const QMultiMap<QObject *, Qt::GestureType> &contexts, |
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| 61 | QEvent *event); |
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| 62 | |
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| 63 | private: |
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| 64 | QMultiMap<Qt::GestureType, QGestureRecognizer *> m_recognizers; |
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| 65 | |
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| 66 | QSet<QGesture *> m_activeGestures; |
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| 67 | QSet<QGesture *> m_maybeGestures; |
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| 68 | |
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| 69 | struct ObjectGesture |
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| 70 | { |
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| 71 | QObject* object; |
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| 72 | Qt::GestureType gesture; |
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| 73 | |
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| 74 | ObjectGesture(QObject *o, const Qt::GestureType &g) : object(o), gesture(g) { } |
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| 75 | inline bool operator<(const ObjectGesture &rhs) const |
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| 76 | { |
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| 77 | if (std::less<QObject *>{}(object, rhs.object)) |
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| 78 | return true; |
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| 79 | if (object == rhs.object) |
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| 80 | return gesture < rhs.gesture; |
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| 81 | return false; |
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| 82 | } |
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| 83 | }; |
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| 84 | |
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| 85 | QMap<ObjectGesture, QList<QGesture *> > m_objectGestures; |
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| 86 | QHash<QGesture *, QGestureRecognizer *> m_gestureToRecognizer; |
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| 87 | QHash<QGesture *, QObject *> m_gestureOwners; |
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| 88 | |
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| 89 | QHash<QGesture *, QPointer<QWidget> > m_gestureTargets; |
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| 90 | |
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| 91 | int m_lastCustomGestureId; |
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| 92 | |
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| 93 | QHash<QGestureRecognizer *, QSet<QGesture *> > m_obsoleteGestures; |
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| 94 | QHash<QGesture *, QGestureRecognizer *> m_deletedRecognizers; |
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| 95 | QSet<QGesture *> m_gesturesToDelete; |
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| 96 | void cleanupGesturesForRemovedRecognizer(QGesture *gesture); |
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| 97 | |
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| 98 | QGesture *getState(QObject *widget, QGestureRecognizer *recognizer, |
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| 99 | Qt::GestureType gesture); |
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| 100 | void deliverEvents(const QSet<QGesture *> &gestures, |
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| 101 | QSet<QGesture *> *undeliveredGestures); |
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| 102 | void getGestureTargets(const QSet<QGesture*> &gestures, |
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| 103 | QHash<QWidget *, QList<QGesture *> > *conflicts, |
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| 104 | QHash<QWidget *, QList<QGesture *> > *normal); |
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| 105 | |
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| 106 | void cancelGesturesForChildren(QGesture *originatingGesture); |
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| 107 | }; |
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| 108 | |
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| 109 | QT_END_NAMESPACE |
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| 110 | |
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| 111 | #endif // QT_NO_GESTURES |
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| 112 | |
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| 113 | #endif // QGESTUREMANAGER_P_H |
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| 114 | |
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