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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, 2004, 2005, 2006, 2008, 2010 Apple Inc. All rights reserved.
* Copyright (C) 2013 Samsung Electronics. 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.
*
*/
#ifndef WheelEvent_h
#define WheelEvent_h
#include "core/events/EventDispatchMediator.h"
#include "core/events/MouseEvent.h"
#include "core/events/WheelEventInit.h"
#include "platform/geometry/FloatPoint.h"
namespace blink {
class PlatformWheelEvent;
class WheelEvent final : public MouseEvent {
DEFINE_WRAPPERTYPEINFO();
public:
enum { TickMultiplier = 120 };
enum DeltaMode {
DOM_DELTA_PIXEL = 0,
DOM_DELTA_LINE,
DOM_DELTA_PAGE
};
static PassRefPtrWillBeRawPtr<WheelEvent> create()
{
return adoptRefWillBeNoop(new WheelEvent);
}
static PassRefPtrWillBeRawPtr<WheelEvent> create(const AtomicString& type, const WheelEventInit& initializer)
{
return adoptRefWillBeNoop(new WheelEvent(type, initializer));
}
static PassRefPtrWillBeRawPtr<WheelEvent> create(const FloatPoint& wheelTicks,
const FloatPoint& rawDelta, unsigned deltaMode, PassRefPtrWillBeRawPtr<AbstractView> view,
const IntPoint& screenLocation, const IntPoint& windowLocation,
bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short buttons, bool canScroll, bool hasPreciseScrollingDeltas)
{
return adoptRefWillBeNoop(new WheelEvent(wheelTicks, rawDelta, deltaMode, view,
screenLocation, windowLocation, ctrlKey, altKey, shiftKey, metaKey, buttons, canScroll, hasPreciseScrollingDeltas));
}
double deltaX() const { return m_deltaX; } // Positive when scrolling right.
double deltaY() const { return m_deltaY; } // Positive when scrolling down.
double deltaZ() const { return m_deltaZ; }
int wheelDelta() const { return wheelDeltaY() ? wheelDeltaY() : wheelDeltaX(); } // Deprecated.
int wheelDeltaX() const { return m_wheelDelta.x(); } // Deprecated, negative when scrolling right.
int wheelDeltaY() const { return m_wheelDelta.y(); } // Deprecated, negative when scrolling down.
unsigned deltaMode() const { return m_deltaMode; }
float ticksX() const { return static_cast<float>(m_wheelDelta.x()) / TickMultiplier; }
float ticksY() const { return static_cast<float>(m_wheelDelta.y()) / TickMultiplier; }
bool canScroll() const { return m_canScroll; }
bool hasPreciseScrollingDeltas() const { return m_hasPreciseScrollingDeltas; }
virtual const AtomicString& interfaceName() const override;
virtual bool isMouseEvent() const override;
virtual bool isWheelEvent() const override;
virtual void trace(Visitor*) override;
private:
WheelEvent();
WheelEvent(const AtomicString&, const WheelEventInit&);
WheelEvent(const FloatPoint& wheelTicks, const FloatPoint& rawDelta,
unsigned, PassRefPtrWillBeRawPtr<AbstractView>, const IntPoint& screenLocation, const IntPoint& windowLocation,
bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short buttons, bool canScroll, bool hasPreciseScrollingDeltas);
IntPoint m_wheelDelta;
double m_deltaX;
double m_deltaY;
double m_deltaZ;
unsigned m_deltaMode;
bool m_canScroll;
bool m_hasPreciseScrollingDeltas;
};
DEFINE_EVENT_TYPE_CASTS(WheelEvent);
class WheelEventDispatchMediator final : public EventDispatchMediator {
public:
static PassRefPtrWillBeRawPtr<WheelEventDispatchMediator> create(const PlatformWheelEvent&, PassRefPtrWillBeRawPtr<AbstractView>);
private:
WheelEventDispatchMediator(const PlatformWheelEvent&, PassRefPtrWillBeRawPtr<AbstractView>);
WheelEvent& event() const;
virtual bool dispatchEvent(EventDispatcher&) const override;
};
} // namespace blink
#endif // WheelEvent_h
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