/******************************************************************************** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).** All rights reserved.** Contact: Nokia Corporation (qt-info@nokia.com)**** This file is part of the QtGui module of the Qt Toolkit.**** $QT_BEGIN_LICENSE:LGPL$** No Commercial Usage** This file contains pre-release code and may not be distributed.** You may use this file in accordance with the terms and conditions** contained in the Technology Preview License Agreement accompanying** this package.**** 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 as published by the Free Software** Foundation and appearing in the file LICENSE.LGPL included in the** packaging of this file. Please review the following information to** ensure the GNU Lesser General Public License version 2.1 requirements** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.**** In addition, as a special exception, Nokia gives you certain additional** rights. These rights are described in the Nokia Qt LGPL Exception** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.**** If you have questions regarding the use of this file, please contact** Nokia at qt-info@nokia.com.****************** $QT_END_LICENSE$******************************************************************************/#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"QT_BEGIN_NAMESPACEclass QBasicTimer;class QGraphicsObject;class QGestureManager : public QObject{ Q_OBJECTpublic: QGestureManager(QObject *parent); ~QGestureManager(); Qt::GestureType registerGestureRecognizer(QGestureRecognizer *recognizer); void unregisterGestureRecognizer(Qt::GestureType type); bool filterEvent(QWidget *receiver, QEvent *event); bool filterEvent(QGesture *receiver, QEvent *event); bool filterEvent(QGraphicsObject *receiver, QEvent *event); // declared in qapplication.cpp static QGestureManager* instance();protected: void timerEvent(QTimerEvent *event); bool filterEventThroughContexts(const QMap<QObject *, Qt::GestureType> &contexts, QEvent *event);private: QMultiMap<Qt::GestureType, QGestureRecognizer *> recognizers; QSet<QGesture *> activeGestures; QMap<QGesture *, QBasicTimer> 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 explicitely } state; struct ObjectGesture { QWeakPointer<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.data() < rhs.object.data()) return true; if (object == rhs.object) return gesture < rhs.gesture; return false; } }; QMap<ObjectGesture, QGesture *> objectGestures; QMap<QGesture *, QGestureRecognizer *> gestureToRecognizer; QHash<QGesture *, QObject *> gestureOwners; QHash<QGesture *, QWidget *> gestureTargets; int lastCustomGestureId; QGesture *getState(QObject *widget, Qt::GestureType gesture); void deliverEvents(const QSet<QGesture *> &gestures, QSet<QGesture *> *undeliveredGestures); void getGestureTargets(const QSet<QGesture*> &gestures, QMap<QWidget *, QList<QGesture *> > *conflicts, QMap<QWidget *, QList<QGesture *> > *normal);};QT_END_NAMESPACE#endif // QGESTUREMANAGER_P_H