gecko-dev/view/public/nsIScrollPositionListener.h

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/* -*- 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
*
* Alternatively, the contents of this file may be used under the terms of
* 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"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsIScrollPositionListener_h___
#define nsIScrollPositionListener_h___
#include "nsISupports.h"
#include "nsCoord.h"
// forward declarations
class nsIScrollableView;
// IID for the nsIScrollPositionListener interface
// {f8dfc500-6ad1-11d3-8360-a3f373ff79fc}
#define NS_ISCROLLPOSITIONLISTENER_IID \
{ 0xf8dfc500, 0x6ad1, 0x11d3, { 0x83, 0x60, 0xa3, 0xf3, 0x73, 0xff, 0x79, 0xfc } }
/**
* Provides a way for a client of an nsIScrollableView to learn about scroll position
* changes.
*/
class nsIScrollPositionListener : public nsISupports {
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISCROLLPOSITIONLISTENER_IID)
NS_IMETHOD ScrollPositionWillChange(nsIScrollableView* aScrollable, nscoord aX, nscoord aY) = 0;
NS_IMETHOD ScrollPositionDidChange(nsIScrollableView* aScrollable, nscoord aX, nscoord aY) = 0;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIScrollPositionListener,
NS_ISCROLLPOSITIONLISTENER_IID)
#endif /* nsIScrollPositionListener_h___ */