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/*
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
* Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
* Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
* Copyright (C) 2003, 2005, 2006, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "WheelEvent.h"
#include "EventNames.h"
#include <wtf/MathExtras.h>
namespace WebCore {
WheelEvent::WheelEvent()
: m_wheelDeltaX(0)
, m_wheelDeltaY(0)
{
}
WheelEvent::WheelEvent(float wheelDeltaX, float wheelDeltaY, PassRefPtr<AbstractView> view,
int screenX, int screenY, int pageX, int pageY,
bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
: MouseRelatedEvent(eventNames().mousewheelEvent,
true, true, view, 0, screenX, screenY, pageX, pageY,
ctrlKey, altKey, shiftKey, metaKey)
, m_wheelDeltaX(lroundf(wheelDeltaX) * 120)
, m_wheelDeltaY(lroundf(wheelDeltaY) * 120) // Normalize to the Windows 120 multiple
{
// Rounding delta to zero makes no sense and breaks Google Maps, <http://bugs.webkit.org/show_bug.cgi?id=16078>.
if (wheelDeltaX && !m_wheelDeltaX)
m_wheelDeltaX = (wheelDeltaX > 0) ? 120 : -120;
if (wheelDeltaY && !m_wheelDeltaY)
m_wheelDeltaY = (wheelDeltaY > 0) ? 120 : -120;
}
void WheelEvent::initWheelEvent(int wheelDeltaX, int wheelDeltaY, PassRefPtr<AbstractView> view,
int screenX, int screenY, int pageX, int pageY,
bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
{
if (dispatched())
return;
initUIEvent(eventNames().mousewheelEvent, true, true, view, 0);
m_screenX = screenX;
m_screenY = screenY;
m_ctrlKey = ctrlKey;
m_altKey = altKey;
m_shiftKey = shiftKey;
m_metaKey = metaKey;
m_wheelDeltaX = wheelDeltaX;
m_wheelDeltaY = wheelDeltaY;
initCoordinates(pageX, pageY);
}
bool WheelEvent::isWheelEvent() const
{
return true;
}
} // namespace WebCore
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