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/*
* 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 <QtCore/QBasicTimer>
#include <QtCore/QObject>
#include <QtCore/QtGlobal>
#include <wtf/OwnPtr.h>
QT_BEGIN_NAMESPACE
class QTouchEvent;
QT_END_NAMESPACE
// FIXME: These constants should possibly depend on DPI.
const qreal initialTriggerDistanceThreshold = 5;
const qreal maxDoubleTapDistance = 120;
const int tapAndHoldTime = 800;
const int doubleClickInterval = 400;
class QtWebPageEventHandler;
namespace WebKit {
class QtTapGestureRecognizer : public QObject, private QtGestureRecognizer {
public:
QtTapGestureRecognizer(QtWebPageEventHandler*);
bool recognize(const QTouchEvent*, qint64 eventTimestampMillis);
void reset();
protected:
void timerEvent(QTimerEvent*);
void tapTimeout();
void tapAndHoldTimeout();
private:
QBasicTimer m_doubleTapTimer;
QBasicTimer m_tapAndHoldTimer;
OwnPtr<QTouchEvent> m_touchBeginEventForTap;
enum {
NoTap,
SingleTapStarted,
DoubleTapCandidate,
TapAndHold
} m_tapState;
};
} // namespace WebKit
#endif /* QtTapGestureRecognizer_h */
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