nsIScrollObserver.h (1257B)
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 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 nsIScrollObserver_h___ 8 #define nsIScrollObserver_h___ 9 10 #include "nsISupports.h" 11 #include "Units.h" 12 13 // Must be kept in sync with xpcom/rust/xpcom/src/interfaces/nonidl.rs 14 #define NS_ISCROLLOBSERVER_IID \ 15 {0xaa5026eb, 0x2f88, 0x4026, {0xa4, 0x6b, 0xf4, 0x59, 0x6b, 0x4e, 0xdf, 0x00}} 16 17 class nsIScrollObserver : public nsISupports { 18 public: 19 NS_INLINE_DECL_STATIC_IID(NS_ISCROLLOBSERVER_IID) 20 21 /** 22 * Called when the scroll position of some element has changed. 23 */ 24 virtual void ScrollPositionChanged() = 0; 25 26 /** 27 * Called when an async panning/zooming transform has started being applied 28 * and passed the scroll offset 29 */ 30 MOZ_CAN_RUN_SCRIPT virtual void AsyncPanZoomStarted() {}; 31 32 /** 33 * Called when an async panning/zooming transform is no longer applied 34 * and passed the scroll offset 35 */ 36 MOZ_CAN_RUN_SCRIPT virtual void AsyncPanZoomStopped() {}; 37 }; 38 39 #endif /* nsIScrollObserver_h___ */