/* * Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies) * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef QtTapGestureRecognizer_h #define QtTapGestureRecognizer_h #include "QtGestureRecognizer.h" #include <QTouchEvent> #include <QtCore/QBasicTimer> #include <QtCore/QObject> // FIXME: These constants should possibly depend on DPI. const int maxPanDistance = 10; const int maxDoubleTapDistance = 120; const int tapAndHoldTime = 800; const int maxDoubleTapInterval = 400; const int highlightDelay = 80; namespace WebKit { class QtWebPageEventHandler; class QtTapGestureRecognizer : public QObject, private QtGestureRecognizer { public: QtTapGestureRecognizer(QtWebPageEventHandler*); bool update(QEvent::Type eventType, const QTouchEvent::TouchPoint&); void cancel(); protected: void timerEvent(QTimerEvent*); void highlightTimeout(); void singleTapTimeout(); void tapAndHoldTimeout(); private: void reset(); bool withinDistance(const QTouchEvent::TouchPoint&, int distance); QBasicTimer m_highlightTimer; QBasicTimer m_doubleTapTimer; QBasicTimer m_tapAndHoldTimer; QTouchEvent::TouchPoint m_lastTouchPoint; enum { Invalid, SingleTapCandidate, DoubleTapCandidate, } m_candidate; }; } // namespace WebKit #endif /* QtTapGestureRecognizer_h */