/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2001
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Mike Pinkerton <pinkerton@netscape.com>
 *   Adam Lock <adamlock@netscape.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 *
 * ***** END LICENSE BLOCK ***** */
 
#include "nsISupports.idl"

/**
 * An optional interface for embedding clients wishing to receive
 * notifications for when a tooltip should be displayed or removed.
 * The embedder implements this interface on the web browser chrome
 * object associated with the window that notifications are required
 * for.
 *
 * @see nsITooltipTextProvider
 *
 * @status FROZEN
 */
[scriptable, uuid(44b78386-1dd2-11b2-9ad2-e4eee2ca1916)]
interface nsITooltipListener : nsISupports
{
    /**
     * Called when a tooltip should be displayed.
     *
     * @param aXCoords The tooltip left edge X coordinate.
     * @param aYCoords The tooltip top edge Y coordinate.
     * @param aTipText The text to display in the tooltip, typically obtained
     *        from the TITLE attribute of the node (or containing parent)
     *        over which the pointer has been positioned.
     *
     * @note
     * Coordinates are specified in pixels, relative to the top-left
     * corner of the browser area.
     *
     * @return <code>NS_OK</code> if the tooltip was displayed.
     */
    void onShowTooltip(in long aXCoords, in long aYCoords, in wstring aTipText);
  
    /**
     * Called when the tooltip should be hidden, either because the pointer
     * has moved or the tooltip has timed out.
     */
    void onHideTooltip();
};