1/*
2 * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
3 *           (C) 2006 Michael Emmel mike.emmel@gmail.com.  All rights reserved.
4 *           (C) 2008 Kenneth Rohde Christiansen.  All rights reserved.
5 *           (C) 2009 INdT - Instituto Nokia de Tecnologia.
6 *           (C) 2009-2010 ProFUSION embedded systems
7 *           (C) 2009-2010 Samsung Electronics
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
22 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
25 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
26 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "PlatformWheelEvent.h"
33
34#include "Scrollbar.h"
35
36#include <Evas.h>
37
38namespace WebCore {
39
40enum {
41    VerticalScrollDirection = 0,
42    HorizontalScrollDirection = 1
43};
44
45PlatformWheelEvent::PlatformWheelEvent(const Evas_Event_Mouse_Wheel* ev)
46    : m_position(IntPoint(ev->canvas.x, ev->canvas.y))
47    , m_globalPosition(IntPoint(ev->canvas.x, ev->canvas.y))
48    , m_granularity(ScrollByPixelWheelEvent)
49    , m_isAccepted(false)
50    , m_shiftKey(evas_key_modifier_is_set(ev->modifiers, "Shift"))
51    , m_ctrlKey(evas_key_modifier_is_set(ev->modifiers, "Control"))
52    , m_altKey(evas_key_modifier_is_set(ev->modifiers, "Alt"))
53    , m_metaKey(evas_key_modifier_is_set(ev->modifiers, "Meta"))
54{
55    // A negative z value means (in EFL) that we are scrolling down, so we need
56    // to invert the value.
57    if (ev->direction == VerticalScrollDirection) {
58        m_deltaX = 0;
59        m_deltaY = - ev->z;
60    } else if (ev->direction == HorizontalScrollDirection) {
61        m_deltaX = - ev->z;
62        m_deltaY = 0;
63    }
64
65    // FIXME: retrieve the user setting for the number of lines to scroll on each wheel event
66    m_wheelTicksX = m_deltaX;
67    m_wheelTicksY = m_deltaY;
68    m_deltaX *= static_cast<float>(Scrollbar::pixelsPerLineStep());
69    m_deltaY *= static_cast<float>(Scrollbar::pixelsPerLineStep());
70}
71
72}
73