view/public/nsIScrollPositionListener.h
author Ed Morley <bmo@edmorley.co.uk>
Thu, 06 Oct 2011 17:15:07 +0100
changeset 78250 ec4cb3b08fa1a11ed6c9de16ab0b21c2e660506e
parent 37871 3f8d4e7bd9a17d861b60b99d8d69fed2a35bc48f
child 94846 f4157e8c410708d76703f19e4dfb61859bfe32d8
permissions -rw-r--r--
Bug 689884 - Skip Makefiles that are no-op or else only |DIRS = a_single_subdir|; r=khuey

/* -*- Mode: IDL; tab-width: 2; 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 Communicator.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corp.
 * Portions created by the Initial Developer are Copyright (C) 1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Patrick Beard
 *
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 * either of 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"),
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#ifndef nsIScrollPositionListener_h___
#define nsIScrollPositionListener_h___

#include "nsCoord.h"

/**
 * Provides a way for a client of an nsIScrollableView to learn about scroll position
 * changes.
 */
class nsIScrollPositionListener {
public:

	virtual void ScrollPositionWillChange(nscoord aX, nscoord aY) = 0;
	virtual void ScrollPositionDidChange(nscoord aX, nscoord aY) = 0;
};

#endif /* nsIScrollPositionListener_h___ */