/*
 * Copyright (C) 2006, 2007, 2010 Apple Inc. All rights reserved.
 * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
 * Copyright (C) 2013 Samsung Electronics. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

interface WheelEvent : MouseEvent {
    constructor(DOMString type, optional WheelEventInit eventInitDict);

    // DeltaModeCode
    const unsigned long DOM_DELTA_PIXEL = 0x00;
    const unsigned long DOM_DELTA_LINE = 0x01;
    const unsigned long DOM_DELTA_PAGE = 0x02;

    readonly attribute unrestricted double deltaX;
    readonly attribute unrestricted double deltaY;
    readonly attribute unrestricted double deltaZ;
    readonly attribute unsigned long deltaMode;

    // Legacy MouseWheelEvent API replaced by standard WheelEvent API.
    readonly attribute long wheelDeltaX;
    readonly attribute long wheelDeltaY;
    readonly attribute long wheelDelta;

    readonly attribute boolean webkitDirectionInvertedFromDevice;

    void initWebKitWheelEvent(optional long wheelDeltaX = 0, optional long wheelDeltaY = 0, optional WindowProxy? view = null,
        optional long screenX = 0, optional long screenY = 0, optional long clientX = 0, optional long clientY = 0,
        optional boolean ctrlKey = false, optional boolean altKey = false,
        optional boolean shiftKey = false, optional boolean metaKey = false);
};

dictionary WheelEventInit : MouseEventInit {
    double deltaX = 0.0;
    double deltaY = 0.0;
    double deltaZ = 0.0;
    unsigned long deltaMode = 0;

    // Legacy members that we still support for backward compatibility.
    long wheelDeltaX = 0;
    long wheelDeltaY = 0;
};