www.pudn.com > drawpad.zip > eundo.h

#ifndef _EUNDO_H 
#define _EUNDO_H 
 
#include  
 
class ENT; 
 
class EventItem { 
public: 
	enum EventType { INSOBJ,MODOBJ,DELOBJ,MODVAR }; 
	EventItem() {} 
	EventItem(EventType t, ENT *o, ENT *p) { type=t; obj=o; clone=p; } 
	EventType type; 
	ENT *clone; 
	ENT *obj; 
}; 
 
class EventGroup { 
public: 
	EventGroup() {} 
	CList events; 
}; 
 
class UndoBuffer { 
public: 
	UndoBuffer(); 
	~UndoBuffer(); 
	void startRecord(); 
	void stopRecord(); 
	void pushEventItem(EventItem *e); 
	int insertObject(ENT *obj); 
	int deleteObject(ENT *obj); 
	int modifyObject(ENT *obj); 
	int modifySysVar(ENT *obj); 
   
	void clear(); 
	int getStatus(){ return status;}; 
	BOOL readyUndo(); 
	int popEventGroup(); 
	EventItem *popEventItem(); 
   
private: 
	int existObject(ENT *obj); 
	CList eventGroups; 
	EventGroup *curEventGroup; 
	int status; 
		 
}; 
 
void api_undo_rec_start(); 
void api_undo_rec_stop(); 
 
#define UNDO_BEGIN api_undo_rec_start(); { 
#define UNDO_END   } api_undo_rec_stop(); 
 
#endif