gecko-dev/view/public/nsIScrollPositionListener.h

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/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* 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.
*
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* The Original Code is Mozilla Communicator.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corp.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
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* Patrick Beard
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
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#ifndef nsIScrollPositionListener_h___
#define nsIScrollPositionListener_h___
#include "nsISupports.h"
#include "nsCoord.h"
// forward declarations
class nsIScrollableView;
// IID for the nsIScrollPositionListener interface
// {98a0c040-09cf-408b-b55f-321b4f8d9d67}
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#define NS_ISCROLLPOSITIONLISTENER_IID \
{ 0x98a0c040, 0x09cf, 0x408b, \
{ 0xb5, 0x5f, 0x32, 0x1b, 0x4f, 0x8d, 0x9d, 0x67 } }
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/**
* Provides a way for a client of an nsIScrollableView to learn about scroll position
* changes.
*/
class nsIScrollPositionListener : public nsISupports {
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISCROLLPOSITIONLISTENER_IID)
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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;
virtual void ViewPositionDidChange(nsIScrollableView* aScrollable) = 0;
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
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NS_IMETHOD ScrollPositionDidChange(nsIScrollableView* aScrollable, nscoord aX, nscoord aY) = 0;
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};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIScrollPositionListener,
NS_ISCROLLPOSITIONLISTENER_IID)
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#endif /* nsIScrollPositionListener_h___ */