The SBJ MVC Framework - The Model, from Abstraction to Realization

//------------------------------------------------------------------------------
// $Workfile: UndoRedoMgr.h $
// $Header: /SbjDev/SbjCore/UndoRedoMgr.h 4     11/12/08 2:22p Steve $
//
//	Copyright � 2008 SbjCat
// All rights reserved.
//
//
// *** Authors ***
//	 Steve Johnson
//
// $Revision: 4 $
//
//-----------------------------------------------------------------------------

#pragma once 

namespace SbjCore
{
	namespace UndoRedo
	{
		class Handler;
		
		struct ManagerImpl;
		
		/**
		The UndoRedo::Manager class maintains two internal stacks, one for Undo and 
		one for Redo. To provide Undo/Redo handling for an action or command, an 
		UndoRedo::Handler derivative is allocated on the heap and pushed onto the 
		Manager's Undo stack with a call to Push. When a call to Undo is made, 
		the Handler is popped off the Undo stack, its Undo method is executed and 
		the Handler is pushed onto the Redo stack. If a subsequent call to Redo is 
		made, the Handler is popped off the Redo stack and its Redo method is 
		executed and the Handler is returned to the Undo stack. If a new call to 
		Push is made the Redo stack is cleared.
		*/
		class AFX_EXT_CLASS Manager
		{
		public:
			Manager();
			virtual ~Manager();
			
		public:
			void Push(Handler* p);

			bool Undo(int nCount);
			bool Redo(int nCount);
			
			void ClearUndo();
			void ClearRedo();

			CStringList& GetUndoList() const;
			CStringList& GetRedoList() const;
			
			bool EnableUndo() const;
			bool EnableRedo() const;
			
			void SetUndoButton(CMFCRibbonUndoButton* p);
			CMFCRibbonUndoButton* GetUndoButton() const;

			void SetRedoButton(CMFCRibbonUndoButton* p);
			CMFCRibbonUndoButton* GetRedoButton() const;
			
		private:
			struct ManagerImpl* const m_pImpl;
		}; 
		
	}
}


//*** Modification History ***
// $Log: /SbjDev/SbjCore/UndoRedoMgr.h $
// 
// 4     11/12/08 2:22p Steve
// Finished Generalization of Model  v2.0.1
// 
// 3     10/24/08 9:03a Steve