/* * Copyright (C) 2006 Apple 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 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 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()); } }