Line data    Source code

       1             : /* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
       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/. */
       6             : 
       7             : #ifndef nsIScrollPositionListener_h___
       8             : #define nsIScrollPositionListener_h___
       9             : 
      10             : #include "nsCoord.h"
      11             : 
      12             : /**
      13             :  * Provides a way to learn about scroll position changes of nsIScrollableFrame's.
      14             :  */
      15          23 : class nsIScrollPositionListener {
      16             : public:
      17             : 
      18             :         virtual void ScrollPositionWillChange(nscoord aX, nscoord aY) = 0;
      19             :         virtual void ScrollPositionDidChange(nscoord aX, nscoord aY) = 0;
      20             : };
      21             : 
      22             : #endif /* nsIScrollPositionListener_h___ */
      23             :