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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWidgets module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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"
#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)
static QGestureManager* instance(); // declared 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;
enum State {
Gesture,
NotGesture,
MaybeGesture // this means timers are up and waiting for some
// more events, and input events are handled by
// gesture recognizer explicitly
} state;
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
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