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70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef nsIViewObserver_h___
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#define nsIViewObserver_h___
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#include "nsISupports.h"
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#include "nsGUIEvent.h"
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class nsIRenderingContext;
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struct nsRect;
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#define NS_IVIEWOBSERVER_IID \
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{ 0x6a1529e0, 0x3d2c, 0x11d2, \
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{ 0xa8, 0x32, 0x00, 0x40, 0x95, 0x9a, 0x28, 0xc9 } }
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class nsIViewObserver : public nsISupports
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{
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public:
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/* called when the observer needs to paint
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* @param aRenderingContext - rendering context to paint to
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* @param aDirtyRect - rectangle of dirty area
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* @return error status
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*/
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NS_IMETHOD Paint(nsIView * aView,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect) = 0;
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/* called when the observer needs to handle an event
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* @param aEvent - event notification
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* @param aEventStatus - out parameter for event handling
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* status
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* @return error status
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*/
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NS_IMETHOD HandleEvent(nsIView * aView,
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nsGUIEvent* aEvent,
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nsEventStatus& aEventStatus) = 0;
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/* called when the view has been repositioned due to scrolling
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* @return error status
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*/
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NS_IMETHOD Scrolled(nsIView * aView) = 0;
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/* called when the view has been resized and the
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* content within the view needs to be reflowed.
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* @param aWidth - new width of view
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* @param aHeight - new height of view
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* @return error status
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*/
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NS_IMETHOD ResizeReflow(nsIView * aView, nscoord aWidth, nscoord aHeight) = 0;
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};
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#endif
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