pjs/view/public/nsIScrollPositionListener.h

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1.7 KiB
C
Исходник Обычный вид История

1999-09-18 08:34:49 +04:00
/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Mozilla Communicator.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corp. Portions created by Netscape are Copyright (C) 1999 Netscape
* Communications Corp. All Rights Reserved.
*
* Contributor(s):
* Patrick Beard
*/
#ifndef nsIScrollPositionListener_h___
#define nsIScrollPositionListener_h___
#include "nsISupports.h"
#include "nsCoord.h"
// forward declarations
class nsIScrollableView;
// IID for the nsIScrollPositionListener interface
// {f8dfc500-6ad1-11d3-8360-a3f373ff79fc}
#define NS_ISCROLLPOSITIONLISTENER_IID \
{ 0xf8dfc500, 0x6ad1, 0x11d3, { 0x83, 0x60, 0xa3, 0xf3, 0x73, 0xff, 0x79, 0xfc } }
/**
* Provides a way for a client of an nsIScrollableView to learn about scroll position
* changes.
*/
class nsIScrollPositionListener : public nsISupports {
public:
NS_DEFINE_STATIC_IID_ACCESSOR(NS_ISCROLLPOSITIONLISTENER_IID)
Fix for bug #15360: Drag Selecting, Clicking, then Clicking leaves caret cruft. r=troy@netscape.com,kipp@netscape.com,evaughan@netscape.com,beard@netscape.com layout/html/base/src/nsGfxScrollFrame.cpp - Renamed all occurrences of ScrollPositionChanged() to to ScrollPositionDidChange() to match changes made to nsIScrollPositionListener. - Added ScrollPositionWillChange() stub method. layout/html/base/src/nsPresShell.cpp - Added PresShellViewEventListener class that implements the nsIScrollPositionListener and nsICompositeListener view interfaces. This allows us to turn caret rendering on and off when scrolling and repainting to prevent leaving caret cruft on the screen. - PresShellViewEventListener is created in InitialReflow(), and released in ~PresShell(). view/public/Makefile.in view/public/makefile.win view/public/MANIFEST - Added nsICompositeListener to list of files to be exported. view/public/nsICompositeListener.h - New file. Implementers of this interface can register themselves with the view manager to receive notification before and after a view is composited/refreshed. view/public/nsIScrollPositionListener.h - Added a ScrollPositionWillChange() method. - Changed ScrollPositionChanged() to ScrollPositionDidChange(). view/public/nsIViewManager.h - Added AddCompositeListener() and RemoveCompositeListener methods. view/src/nsScrollingView.cpp view/src/nsScrollingView.h - Added NotifyScrollPositionWillChange() and NotifyScrollPositionDidChange() methods. - Modified HandleScrollEvent() to call NotifyScrollPositionWill/DidChange() methods. Added temporary offsetX and offsetY variables to allow us to calculate new offsets without changing mOffsetX and mOffsetY before notifications are sent out. view/src/nsScrollPortView.cpp - Changed ScrollPositionChanged() to ScrollPositionDidChange(). - Modified ScrollTo() to call the listener's ScrollPositionWillChange() method. view/src/nsViewManager.cpp view/src/nsViewManager.h - Added AddCompositeListener() and RemoveCompositeListener() methods. - Added support for CompositeListener notifications in the Refresh() methods for regions and rects. - Fix for bug #15901: [DOGFOOD] Selected text does not clear when you type Modified UpdateView() so that rects with zero width and height are no longer added to our damage region. r=beard@netscape.com
1999-10-15 08:29:30 +04:00
NS_IMETHOD ScrollPositionWillChange(nsIScrollableView* aScrollable, nscoord aX, nscoord aY) = 0;
NS_IMETHOD ScrollPositionDidChange(nsIScrollableView* aScrollable, nscoord aX, nscoord aY) = 0;
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};
#endif /* nsIScrollPositionListener_h___ */