1 /* 2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. 3 * Copyright (C) 2006 Michael Emmel mike.emmel (at) gmail.com 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "config.h" 29 #include "PlatformWheelEvent.h" 30 #include "Scrollbar.h" 31 32 #include <gdk/gdk.h> 33 34 namespace WebCore { 35 36 // Keep this in sync with the other platform event constructors 37 PlatformWheelEvent::PlatformWheelEvent(GdkEventScroll* event) 38 { 39 static const float delta = 1; 40 41 m_deltaX = 0; 42 m_deltaY = 0; 43 44 // Docs say an upwards scroll (away from the user) has a positive delta 45 switch (event->direction) { 46 case GDK_SCROLL_UP: 47 m_deltaY = delta; 48 break; 49 case GDK_SCROLL_DOWN: 50 m_deltaY = -delta; 51 break; 52 case GDK_SCROLL_LEFT: 53 m_deltaX = delta; 54 break; 55 case GDK_SCROLL_RIGHT: 56 m_deltaX = -delta; 57 break; 58 } 59 m_wheelTicksX = m_deltaX; 60 m_wheelTicksY = m_deltaY; 61 62 m_position = IntPoint(static_cast<int>(event->x), static_cast<int>(event->y)); 63 m_globalPosition = IntPoint(static_cast<int>(event->x_root), static_cast<int>(event->y_root)); 64 m_granularity = ScrollByPixelWheelEvent; 65 m_isAccepted = false; 66 m_shiftKey = event->state & GDK_SHIFT_MASK; 67 m_ctrlKey = event->state & GDK_CONTROL_MASK; 68 m_altKey = event->state & GDK_MOD1_MASK; 69 m_metaKey = event->state & GDK_META_MASK; 70 71 // FIXME: retrieve the user setting for the number of lines to scroll on each wheel event 72 m_deltaX *= static_cast<float>(Scrollbar::pixelsPerLineStep()); 73 m_deltaY *= static_cast<float>(Scrollbar::pixelsPerLineStep()); 74 } 75 76 } 77
