88 lines
1.8 KiB
C
88 lines
1.8 KiB
C
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/*
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* _NOTMGR.H
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*
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* Purpose:
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* Notification Manager declarations
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*
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* Author:
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* AlexGo 6/5/95
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*
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* Copyright (c) 1995-1997, Microsoft Corporation. All rights reserved.
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*/
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#ifndef _NOTMGR_H_
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#define _NOTMGR_H_
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// forward declaration
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class CNotifyMgr;
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// Set cp to this to signal that the control has converted from rich to plain.
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const DWORD CONVERT_TO_PLAIN = 0xFFFFFFFE;
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// id values used in NOTIFY_DATA
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#define NOTIFY_DATA_TEXT_ID 0x0001 // used by RTEXT
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// Flags values used in NOTIFY_DATA
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#define TN_TX_CELL_SHRINK 0x0001 // indicate some text cells have been removed.
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typedef struct
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{
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DWORD id;
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DWORD dwFlags;
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VOID *pData;
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} NOTIFY_DATA;
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/*
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* ITxNotify
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*
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* Purpose:
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* a notification sink for events happening to the backing store,
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* used by the Notification Manager
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*/
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class ITxNotify
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{
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public:
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virtual void OnPreReplaceRange( LONG cp, LONG cchDel, LONG cchNew,
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LONG cpFormatMin, LONG cpFormatMax, NOTIFY_DATA *pNotifyData ) = 0;
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virtual void OnPostReplaceRange( LONG cp, LONG cchDel, LONG cchNew,
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LONG cpFormatMin, LONG cpFormatMax, NOTIFY_DATA *pNotifyData ) = 0;
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virtual void Zombie() = 0;
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private:
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ITxNotify * _pnext;
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friend class CNotifyMgr; // so it can manipulate _pnext
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};
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/*
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* CNotifyMgr
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*
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* Purpose:
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* the general notification manager; keeps track of all interested
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* notification sinks
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*/
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class CNotifyMgr
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{
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public:
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void Add( ITxNotify *pITN );
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void Remove( ITxNotify *pITN );
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void NotifyPreReplaceRange( ITxNotify *pITNignore, LONG cp, LONG cchDel,
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LONG cchNew, LONG cpFormatMin, LONG cpFormatMax, NOTIFY_DATA *pNotifyData = NULL );
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void NotifyPostReplaceRange( ITxNotify *pITNignore, LONG cp, LONG cchDel,
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LONG cchNew, LONG cpFormatMin, LONG cpFormatMax, NOTIFY_DATA *pNotifyData = NULL );
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CNotifyMgr();
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~CNotifyMgr();
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private:
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ITxNotify * _pitnlist;
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};
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#endif //_NOTMGR_H_
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