//------------------------------------------------------------------------------ // $Workfile: Handler.h $ // $Header: $ // // Copyright � 2008 SbjCat // All rights reserved. // // // *** Authors *** // Steve Johnson // // $Revision: $ // //----------------------------------------------------------------------------- #pragma once namespace SbjCore { namespace UndoRedo { /** Handler is a pure virtual base class. Derivatives handle the details of performing any undo or redo of an action. Derivatives should make their dtor protected to force dynamic allocation as these are pushed onto the UndoRedoMgr's stack, and once there, the manager handles deletion once the Handler is no longer part of the UndoRedo process. */ class AFX_EXT_CLASS Handler { public: virtual ~Handler(void); public: bool HandleUndo(); bool HandleRedo(); LPCTSTR GetHandlerName() const; private: virtual bool OnHandleUndo() = 0; virtual bool OnHandleRedo() = 0; virtual LPCTSTR OnGetHandlerName() const = 0; }; } } //*** Modification History *** // $Log: $
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