WebCore/dom/WheelEvent.h

   1 /*
   2  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
   3  * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
   4  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
   5  * Copyright (C) 2003, 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Library General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Library General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Library General Public License
  18  * along with this library; see the file COPYING.LIB.  If not, write to
  19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20  * Boston, MA 02110-1301, USA.
  21  *
  22  */
  23
  24 #ifndef WheelEvent_h
  25 #define WheelEvent_h
  26
  27 #include "MouseRelatedEvent.h"
  28
  29 namespace WebCore {
  30
  31     // extension: mouse wheel event
  32     class WheelEvent : public MouseRelatedEvent {
  33     public:
  34         static PassRefPtr<WheelEvent> create()
  35         {
  36             return adoptRef(new WheelEvent);
  37         }
  38         static PassRefPtr<WheelEvent> create(float wheelDeltaX, float wheelDeltaY, PassRefPtr<AbstractView> view,
  39             int screenX, int screenY, int pageX, int pageY,
  40             bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
  41         {
  42             return adoptRef(new WheelEvent(wheelDeltaX, wheelDeltaY, view, screenX, screenY, pageX, pageY,
  43                 ctrlKey, altKey, shiftKey, metaKey));
  44         }
  45
  46         void initWheelEvent(int wheelDeltaX, int wheelDeltaY, PassRefPtr<AbstractView>,
  47                             int screenX, int screenY, int pageX, int pageY,
  48                             bool ctrlKey, bool altKey, bool shiftKey, bool metaKey);
  49
  50         int wheelDelta() const { if (m_wheelDeltaY == 0) return m_wheelDeltaX; return m_wheelDeltaY; }
  51         int wheelDeltaX() const { return m_wheelDeltaX; }
  52         int wheelDeltaY() const { return m_wheelDeltaY; }
  53
  54         // Needed for Objective-C legacy support
  55         bool isHorizontal() const { return m_wheelDeltaX; }
  56
  57     private:
  58         WheelEvent();
  59         WheelEvent(float wheelDeltaX, float wheelDeltaY, PassRefPtr<AbstractView>,
  60                    int screenX, int screenY, int pageX, int pageY,
  61                    bool ctrlKey, bool altKey, bool shiftKey, bool metaKey);
  62
  63         virtual bool isWheelEvent() const;
  64
  65         int m_wheelDeltaX;
  66         int m_wheelDeltaY;
  67     };
  68
  69 } // namespace WebCore
  70
  71 #endif // WheelEvent_h