/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtGui module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#ifndef QGESTUREMANAGER_P_H+
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#define QGESTUREMANAGER_P_H+
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+
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//+
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//  W A R N I N G+
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//  -------------+
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//+
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// This file is not part of the Qt API.  It exists for the convenience+
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// of other Qt classes.  This header file may change from version to+
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// version without notice, or even be removed.+
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//+
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// We mean it.+
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//+
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+
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#include "qobject.h"+
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#include "qbasictimer.h"+
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#include "private/qwidget_p.h"+
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#include "qgesturerecognizer.h"+
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+
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#ifndef QT_NO_GESTURES+
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+
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QT_BEGIN_NAMESPACE+
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+
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class QBasicTimer;+
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class QGraphicsObject;+
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class QGestureManager : public QObject+
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{+
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    Q_OBJECT+
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public:+
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    QGestureManager(QObject *parent);+
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    ~QGestureManager();+
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+
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    Qt::GestureType registerGestureRecognizer(QGestureRecognizer *recognizer);+
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    void unregisterGestureRecognizer(Qt::GestureType type);+
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+
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    bool filterEvent(QWidget *receiver, QEvent *event);+
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    bool filterEvent(QObject *receiver, QEvent *event);+
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#ifndef QT_NO_GRAPHICSVIEW+
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    bool filterEvent(QGraphicsObject *receiver, QEvent *event);+
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#endif //QT_NO_GRAPHICSVIEW+
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+
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    static QGestureManager* instance(); // declared in qapplication.cpp+
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+
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    void cleanupCachedGestures(QObject *target, Qt::GestureType type);+
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+
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    void recycle(QGesture *gesture);+
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+
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protected:+
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    bool filterEventThroughContexts(const QMultiMap<QObject *, Qt::GestureType> &contexts,+
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                                    QEvent *event);+
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+
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private:+
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    QMultiMap<Qt::GestureType, QGestureRecognizer *> m_recognizers;+
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+
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    QSet<QGesture *> m_activeGestures;+
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    QSet<QGesture *> m_maybeGestures;+
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+
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    enum State {+
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        Gesture,+
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        NotGesture,+
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        MaybeGesture // this means timers are up and waiting for some+
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                     // more events, and input events are handled by+
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                     // gesture recognizer explicitely+
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    } state;+
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+
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    struct ObjectGesture+
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    {+
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        QWeakPointer<QObject> object;+
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        Qt::GestureType gesture;+
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+
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        ObjectGesture(QObject *o, const Qt::GestureType &g) : object(o), gesture(g) { }+
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        inline bool operator<(const ObjectGesture &rhs) const+
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        {+
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            if (object.data() < rhs.object.data())+
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                return true;+
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            if (object == rhs.object)+
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                return gesture < rhs.gesture;+
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            return false;+
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        }+
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    };+
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+
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    QMap<ObjectGesture, QList<QGesture *> > m_objectGestures;+
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    QHash<QGesture *, QGestureRecognizer *> m_gestureToRecognizer;+
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    QHash<QGesture *, QObject *> m_gestureOwners;+
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+
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    QHash<QGesture *, QWidget *> m_gestureTargets;+
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+
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    int m_lastCustomGestureId;+
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+
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    QHash<QGestureRecognizer *, QSet<QGesture *> > m_obsoleteGestures;+
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    QHash<QGesture *, QGestureRecognizer *> m_deletedRecognizers;+
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    void cleanupGesturesForRemovedRecognizer(QGesture *gesture);+
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+
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    QGesture *getState(QObject *widget, QGestureRecognizer *recognizer,+
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                       Qt::GestureType gesture);+
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    void deliverEvents(const QSet<QGesture *> &gestures,+
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                       QSet<QGesture *> *undeliveredGestures);+
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    void getGestureTargets(const QSet<QGesture*> &gestures,+
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                           QMap<QWidget *, QList<QGesture *> > *conflicts,+
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                           QMap<QWidget *, QList<QGesture *> > *normal);+
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+
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    void cancelGesturesForChildren(QGesture *originatingGesture);+
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};+
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+
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QT_END_NAMESPACE+
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+
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#endif // QT_NO_GESTURES+
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+
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#endif // QGESTUREMANAGER_P_H+
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