1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/textandloc/textrendering/texthandling/inc/MEdObsrv.h	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,62 @@
     1.4 +/*
     1.5 +* Copyright (c) 1999-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.6 +* All rights reserved.
     1.7 +* This component and the accompanying materials are made available
     1.8 +* under the terms of "Eclipse Public License v1.0"
     1.9 +* which accompanies this distribution, and is available
    1.10 +* at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.11 +*
    1.12 +* Initial Contributors:
    1.13 +* Nokia Corporation - initial contribution.
    1.14 +*
    1.15 +* Contributors:
    1.16 +*
    1.17 +* Description: 
    1.18 +*
    1.19 +*/
    1.20 +
    1.21 +
    1.22 +#ifndef __MEDOBSRV_H__
    1.23 +#define __MEDOBSRV_H__
    1.24 +
    1.25 +#include <e32def.h>
    1.26 +
    1.27 +
    1.28 +
    1.29 +class MEditObserver
    1.30 +/** 
    1.31 +Specifies the mixin protocol for a rich text edit observer. 
    1.32 +
    1.33 +This class is implemented by controls which use a rich text (CRichText) object, 
    1.34 +when it is possible for the text object to be changed from outside of the 
    1.35 +control without the control's knowledge.
    1.36 +
    1.37 +An edit observer is a callback to the control from the CRichText object which 
    1.38 +it has been set up to observe. The edit observer is set up using CRichText::SetEditObserver(). 
    1.39 +@publishedAll
    1.40 +@released
    1.41 +*/
    1.42 +	{
    1.43 +public:
    1.44 +	// Observer function called by CRichText to signal changes to the text
    1.45 +	// buffer within it. A pointer to this function must be passed in to
    1.46 +	// a CRichText instance by <rich text instance>.SetEditObserver(<ptr>).
    1.47 +	// aStart is the start position of the edit and aExtent is the number
    1.48 +	// of characters added or, if negative, deleted after this position.
    1.49 +	
    1.50 +	
    1.51 +	/** Observer function called by the CRichText object when the object is edited 
    1.52 +	to give notification of changes to its text buffer. In this way, the control 
    1.53 +	knows how the text object has changed and can reformat and redraw the text 
    1.54 +	object appropriately.
    1.55 +	
    1.56 +	A pointer to the observer object must have been passed in to a CRichText instance 
    1.57 +	using CRichText::SetEditObserver().
    1.58 +	
    1.59 +	@param aStart The start position of the edit. 
    1.60 +	@param aExtent The number of characters added or, if negative, deleted after 
    1.61 +	this position. */
    1.62 +	virtual void EditObserver(TInt aStart, TInt aExtent) = 0;
    1.63 +	};
    1.64 +
    1.65 +#endif