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143 lines
4.7 KiB
C++
143 lines
4.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Copyright (C) 2016-2019 Ivailo Monev
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**
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** This file is part of the QtGui module of the Katie Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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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 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company 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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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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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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// 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 Katie 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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#include "qobject.h"
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#include "qbasictimer.h"
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#include "qwidget_p.h"
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#include "qgesturerecognizer.h"
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#ifndef QT_NO_GESTURES
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QT_BEGIN_NAMESPACE
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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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Qt::GestureType registerGestureRecognizer(QGestureRecognizer *recognizer);
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void unregisterGestureRecognizer(Qt::GestureType type);
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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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static QGestureManager* instance(); // declared in qapplication.cpp
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void cleanupCachedGestures(QObject *target, Qt::GestureType type);
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void recycle(QGesture *gesture);
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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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private:
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QMultiMap<Qt::GestureType, QGestureRecognizer *> m_recognizers;
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QSet<QGesture *> m_activeGestures;
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QSet<QGesture *> m_maybeGestures;
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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 explicitly
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} state;
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struct ObjectGesture
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{
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QObject* object;
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Qt::GestureType gesture;
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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 < rhs.object)
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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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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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QHash<QGesture *, QWidget *> m_gestureTargets;
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int m_lastCustomGestureId;
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QHash<QGestureRecognizer *, QSet<QGesture *> > m_obsoleteGestures;
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QHash<QGesture *, QGestureRecognizer *> m_deletedRecognizers;
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QSet<QGesture *> m_gesturesToDelete;
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void cleanupGesturesForRemovedRecognizer(QGesture *gesture);
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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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void cancelGesturesForChildren(QGesture *originatingGesture);
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};
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QT_END_NAMESPACE
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#endif // QT_NO_GESTURES
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#endif // QGESTUREMANAGER_P_H
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