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Diffstat (limited to 'src/widgets/kernel/qgesturemanager_p.h')
| -rw-r--r-- | src/widgets/kernel/qgesturemanager_p.h | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/src/widgets/kernel/qgesturemanager_p.h b/src/widgets/kernel/qgesturemanager_p.h new file mode 100644 index 0000000000..6c8cbb9cd0 --- /dev/null +++ b/src/widgets/kernel/qgesturemanager_p.h @@ -0,0 +1,151 @@ +/**************************************************************************** +** +** Copyright (C) 2011 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. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** 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. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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 + + 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, + QMap<QWidget *, QList<QGesture *> > *conflicts, + QMap<QWidget *, QList<QGesture *> > *normal); + + void cancelGesturesForChildren(QGesture *originatingGesture); +}; + +QT_END_NAMESPACE + +#endif // QT_NO_GESTURES + +#endif // QGESTUREMANAGER_P_H |