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/*
* Copyright (C) 2011 Benjamin Poulain <benjamin@webkit.org>
*
* 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 QtPinchGestureRecognizer_h
#define QtPinchGestureRecognizer_h
#include "QtGestureRecognizer.h"
#include <QTouchEvent>
#include <QtCore/QList>
#include <QtCore/QPointF>
QT_BEGIN_NAMESPACE
class QTouchEvent;
QT_END_NAMESPACE
namespace WebKit {
class QtPinchGestureRecognizer : public QtGestureRecognizer {
public:
struct TouchPointInformation {
inline TouchPointInformation();
inline TouchPointInformation(const QTouchEvent::TouchPoint&);
inline bool isValid() const;
int id;
QPointF initialScreenPosition;
QPointF initialPosition;
};
QtPinchGestureRecognizer(QtWebPageEventHandler*);
bool recognize(const QTouchEvent*);
void reset();
private:
void initializeGesture(const QList<QTouchEvent::TouchPoint>& touchPoints);
TouchPointInformation m_point1;
TouchPointInformation m_point2;
};
inline QtPinchGestureRecognizer::TouchPointInformation::TouchPointInformation()
: id(-1)
{
}
inline QtPinchGestureRecognizer::TouchPointInformation::TouchPointInformation(const QTouchEvent::TouchPoint& touchPoint)
: id(touchPoint.id())
, initialScreenPosition(touchPoint.screenPos())
, initialPosition(touchPoint.pos())
{
}
inline bool QtPinchGestureRecognizer::TouchPointInformation::isValid() const
{
return id >= 0;
}
}
#endif /* QtPinchGestureRecognizer_h */
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