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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtWidgets module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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 "qobject.h"
#include "qbasictimer.h"
#include "private/qwidget_p.h"
#include "qgesturerecognizer.h"
#ifndef QT_NO_GESTURES
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);
#ifndef QT_NO_GRAPHICSVIEW
bool filterEvent(QGraphicsObject *receiver, QEvent *event);
#endif //QT_NO_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 (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 *, 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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