qgesturemanager_p.h

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// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

// Qt-Security score:significant reason:default

#ifndef QGESTUREMANAGER_P_H

#define QGESTUREMANAGER_P_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists for the convenience

// of other Qt classes.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include <QtWidgets/private/qtwidgetsglobal_p.h>

#include "qobject.h"

#include "qbasictimer.h"

#include "private/qwidget_p.h"

#include "qgesturerecognizer.h"

#include <QtCore/qpointer.h>

#ifndef QT_NO_GESTURES

#include <functional>

QT_BEGIN_NAMESPACE

class QBasicTimer;

class QGraphicsObject;

class QGestureManager : public QObject

    Q_OBJECT

public:

    QGestureManager(QObject *parent);

    ~QGestureManager();

    Qt::GestureType registerGestureRecognizer(QGestureRecognizer *recognizer);

    void unregisterGestureRecognizer(Qt::GestureType type);

    bool filterEvent(QWidget *receiver, QEvent *event);

    bool filterEvent(QObject *receiver, QEvent *event);

#if QT_CONFIG(graphicsview)

    bool filterEvent(QGraphicsObject *receiver, QEvent *event);

#endif // QT_CONFIG(graphicsview)

    enum InstanceCreation { ForceCreation, DontForceCreation };

    static QGestureManager *instance(InstanceCreation ic = ForceCreation); // implemented in qapplication.cpp

    static bool gesturePending(QObject *o);

    void cleanupCachedGestures(QObject *target, Qt::GestureType type);

    void recycle(QGesture *gesture);

protected:

    bool filterEventThroughContexts(const QMultiMap<QObject *, Qt::GestureType> &contexts,

                                    QEvent *event);

private:

    QMultiMap<Qt::GestureType, QGestureRecognizer *> m_recognizers;

    QSet<QGesture *> m_activeGestures;

    QSet<QGesture *> m_maybeGestures;

    struct ObjectGesture

        QObject* object;

        Qt::GestureType gesture;

        ObjectGesture(QObject *o, const Qt::GestureType &g) : object(o), gesture(g) { }

        inline bool operator<(const ObjectGesture &rhs) const

            if (std::less<QObject *>{}(object, rhs.object))

                return true;

            if (object == rhs.object)

                return gesture < rhs.gesture;

            return false;

};

    QMap<ObjectGesture, QList<QGesture *> > m_objectGestures;

    QHash<QGesture *, QGestureRecognizer *> m_gestureToRecognizer;

    QHash<QGesture *, QObject *> m_gestureOwners;

    QHash<QGesture *, QPointer<QWidget> > m_gestureTargets;

    int m_lastCustomGestureId;

    QHash<QGestureRecognizer *, QSet<QGesture *> > m_obsoleteGestures;

    QHash<QGesture *, QGestureRecognizer *> m_deletedRecognizers;

    QSet<QGesture *> m_gesturesToDelete;

    void cleanupGesturesForRemovedRecognizer(QGesture *gesture);

    QGesture *getState(QObject *widget, QGestureRecognizer *recognizer,

                       Qt::GestureType gesture);

    void deliverEvents(const QSet<QGesture *> &gestures,

                       QSet<QGesture *> *undeliveredGestures);

    void getGestureTargets(const QSet<QGesture*> &gestures,

                           QHash<QWidget *, QList<QGesture *> > *conflicts,

                           QHash<QWidget *, QList<QGesture *> > *normal);

    void cancelGesturesForChildren(QGesture *originatingGesture);

};

QT_END_NAMESPACE

#endif // QT_NO_GESTURES

#endif // QGESTUREMANAGER_P_H