1 /* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 #ifndef nsIScrollPositionListener_h___
8 #define nsIScrollPositionListener_h___
13 * Provides a way to learn about scroll position changes of nsIScrollableFrame's.
15 class nsIScrollPositionListener
{
18 virtual void ScrollPositionWillChange(nscoord aX
, nscoord aY
) = 0;
19 virtual void ScrollPositionDidChange(nscoord aX
, nscoord aY
) = 0;
22 #endif /* nsIScrollPositionListener_h___ */