1 files changed, 85 insertions, 0 deletions
diff --git a/WebCore/dom/WheelEvent.cpp b/WebCore/dom/WheelEvent.cpp
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--- /dev/null
+++ b/WebCore/dom/WheelEvent.cpp
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+/**
+ * This file is part of the DOM implementation for KDE.
+ *
+ * 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 Apple Computer, Inc.
+ *
+ * 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 {
+
+using namespace EventNames;
+
+WheelEvent::WheelEvent()
+    : m_wheelDeltaX(0)
+    , m_wheelDeltaY(0)
+{
+}
+
+WheelEvent::WheelEvent(float wheelDeltaX, float wheelDeltaY, AbstractView* view,
+                       int screenX, int screenY, int pageX, int pageY,
+                       bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
+    : MouseRelatedEvent(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, AbstractView* view,
+                                int screenX, int screenY, int pageX, int pageY,
+                                bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
+{
+    if (dispatched())
+        return;
+    
+    initUIEvent(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