/* -*- 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 \ { 0x00bc10e3, 0xaa59, 0x4aa3, \ { 0x88, 0xe9, 0x43, 0x0a, 0x01, 0xa3, 0x88, 0x04 } } 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(const mozilla::CSSIntPoint aScrollPos) {}; /** * Called when an async panning/zooming transform is no longer applied * and passed the scroll offset */ virtual void AsyncPanZoomStopped(const mozilla::CSSIntPoint aScrollPos) {}; }; NS_DEFINE_STATIC_IID_ACCESSOR(nsIScrollObserver, NS_ISCROLLOBSERVER_IID) #endif /* nsIScrollObserver_h___ */