/*

 * 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>

namespace WebCore {

// Keep this in sync with the other platform event constructors

PlatformWheelEvent::PlatformWheelEvent(GdkEventScroll* event)

{

    static const float delta = 1;

    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;

    }

    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_isAccepted = false;

    m_shiftKey = event->state & GDK_SHIFT_MASK;

    m_ctrlKey = event->state & GDK_CONTROL_MASK;

    m_altKey = event->state & GDK_MOD1_MASK;

    m_metaKey = event->state & GDK_META_MASK;

    // 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());

}

}