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/*
Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
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 "PlatformMouseEvent.h"
#include "PlatformWheelEvent.h"
#include "Scrollbar.h"
#include <QGraphicsSceneWheelEvent>
#include <QWheelEvent>
#include <qapplication.h>
namespace WebCore {
void PlatformWheelEvent::applyDelta(int delta, Qt::Orientation orientation)
{
// A delta that is not mod 120 indicates a device that is sending
// fine-resolution scroll events, so use the delta as number of wheel ticks
// and number of pixels to scroll.See also webkit.org/b/29601
bool fullTick = !(delta % 120);
if (orientation == Qt::Horizontal) {
m_deltaX = (fullTick) ? delta / 120.0f : delta;
m_deltaY = 0;
} else {
m_deltaX = 0;
m_deltaY = (fullTick) ? delta / 120.0f : delta;
}
m_wheelTicksX = m_deltaX;
m_wheelTicksY = m_deltaY;
// Use the same single scroll step as QTextEdit
// (in QTextEditPrivate::init [h,v]bar->setSingleStep)
static const float cDefaultQtScrollStep = 20.f;
#ifndef QT_NO_WHEELEVENT
m_deltaX *= (fullTick) ? QApplication::wheelScrollLines() * cDefaultQtScrollStep : 1;
m_deltaY *= (fullTick) ? QApplication::wheelScrollLines() * cDefaultQtScrollStep : 1;
#endif
}
PlatformWheelEvent::PlatformWheelEvent(QGraphicsSceneWheelEvent* e)
#ifndef QT_NO_WHEELEVENT
: m_position(e->pos().toPoint())
, m_globalPosition(e->screenPos())
, m_granularity(ScrollByPixelWheelEvent)
, m_isAccepted(false)
, m_shiftKey(e->modifiers() & Qt::ShiftModifier)
, m_ctrlKey(e->modifiers() & Qt::ControlModifier)
, m_altKey(e->modifiers() & Qt::AltModifier)
, m_metaKey(e->modifiers() & Qt::MetaModifier)
#endif
{
#ifndef QT_NO_WHEELEVENT
applyDelta(e->delta(), e->orientation());
#else
Q_UNUSED(e);
#endif
}
PlatformWheelEvent::PlatformWheelEvent(QWheelEvent* e)
#ifndef QT_NO_WHEELEVENT
: m_position(e->pos())
, m_globalPosition(e->globalPos())
, m_granularity(ScrollByPixelWheelEvent)
, m_isAccepted(false)
, m_shiftKey(e->modifiers() & Qt::ShiftModifier)
, m_ctrlKey(e->modifiers() & Qt::ControlModifier)
, m_altKey(e->modifiers() & Qt::AltModifier)
, m_metaKey(e->modifiers() & Qt::MetaModifier)
#endif
{
#ifndef QT_NO_WHEELEVENT
applyDelta(e->delta(), e->orientation());
#else
Q_UNUSED(e);
#endif
}
} // namespace WebCore
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