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/*
* Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
* Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "PlatformWheelEvent.h"
#include "Scrollbar.h"
#include <gdk/gdk.h>
#include <gtk/gtk.h>
#include <wtf/CurrentTime.h>
namespace WebCore {
// Keep this in sync with the other platform event constructors
PlatformWheelEvent::PlatformWheelEvent(GdkEventScroll* event)
{
static const float delta = 1;
m_type = PlatformEvent::Wheel;
m_timestamp = currentTime();
m_modifiers = 0;
if (event->state & GDK_SHIFT_MASK)
m_modifiers |= ShiftKey;
if (event->state & GDK_CONTROL_MASK)
m_modifiers |= CtrlKey;
if (event->state & GDK_MOD1_MASK)
m_modifiers |= AltKey;
if (event->state & GDK_META_MASK)
m_modifiers |= MetaKey;
m_deltaX = 0;
m_deltaY = 0;
// Docs say an upwards scroll (away from the user) has a positive delta
switch (event->direction) {
case GDK_SCROLL_UP:
m_deltaY = delta;
break;
case GDK_SCROLL_DOWN:
m_deltaY = -delta;
break;
case GDK_SCROLL_LEFT:
m_deltaX = delta;
break;
case GDK_SCROLL_RIGHT:
m_deltaX = -delta;
break;
#if GTK_CHECK_VERSION(3, 3, 18)
case GDK_SCROLL_SMOOTH: {
gdouble deltaX, deltaY;
gdk_event_get_scroll_deltas(reinterpret_cast<GdkEvent*>(event), &deltaX, &deltaY);
m_deltaX = -deltaX;
m_deltaY = -deltaY;
}
break;
#endif
}
m_wheelTicksX = m_deltaX;
m_wheelTicksY = m_deltaY;
m_position = IntPoint(static_cast<int>(event->x), static_cast<int>(event->y));
m_globalPosition = IntPoint(static_cast<int>(event->x_root), static_cast<int>(event->y_root));
m_granularity = ScrollByPixelWheelEvent;
m_directionInvertedFromDevice = false;
// FIXME: retrieve the user setting for the number of lines to scroll on each wheel event
m_deltaX *= static_cast<float>(Scrollbar::pixelsPerLineStep());
m_deltaY *= static_cast<float>(Scrollbar::pixelsPerLineStep());
}
}
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