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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsIScrollObserver_h___
#define nsIScrollObserver_h___
#include "nsISupports.h"
#include "Units.h"
#define NS_ISCROLLOBSERVER_IID \
{ 0xaa5026eb, 0x2f88, 0x4026, \
{ 0xa4, 0x6b, 0xf4, 0x59, 0x6b, 0x4e, 0xdf, 0x00 } }
class nsIScrollObserver : public nsISupports
{
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISCROLLOBSERVER_IID)
/**
* Called when the scroll position of some element has changed.
*/
virtual void ScrollPositionChanged() = 0;
/**
* Called when an async panning/zooming transform has started being applied
* and passed the scroll offset
*/
virtual void AsyncPanZoomStarted() {};
/**
* Called when an async panning/zooming transform is no longer applied
* and passed the scroll offset
*/
virtual void AsyncPanZoomStopped() {};
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIScrollObserver, NS_ISCROLLOBSERVER_IID)
#endif /* nsIScrollObserver_h___ */
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