gecko-dev/view/public/nsIViewObserver.h

70 lines
2.2 KiB
C++

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