The SBJ MVC Framework - The Design View, Responding to Model Change

//------------------------------------------------------------------------------
// $Workfile: Controller.cpp $
// $Header: /SbjDev/SbjCore/Controller.cpp 7     11/12/08 2:22p Steve $
//
//	Copyright � 2008 SbjCat
// All rights reserved.
//
//
// *** Authors ***
//	 Steve Johnson
//
// $Revision: 7 $
//
//-----------------------------------------------------------------------------

#include "stdafx.h"
#include "Controller.h"
#include "UndoRedoMgr.h"


#include <map>

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

namespace SbjCore
{
	namespace Mvc
	{
		// ControllerImpl ///////////////////////////////////////////////

		struct ControllerImpl
		{
			std::map<UINT, MessageHandler*> theHandlerMap;
			HANDLE hItem;
			

			ControllerImpl() :
				hItem(NULL)
			{
			}

			virtual ~ControllerImpl()
			{
				try 
				{
					theHandlerMap.clear();
				}
				catch (...)
				{
					ASSERT(FALSE); // we want to know about it 
				}
			}

		};

		// Controller ///////////////////////////////////////////////
		
		IMPLEMENT_DYNCREATE(Controller, CObject)		
		
		Controller::Controller() :
			m_pImpl(new ControllerImpl)
		{
		}

		Controller::~Controller()
		{
			try 
			{
				delete m_pImpl;
			}
			catch (...)
			{
				ASSERT(FALSE);
			}

		}
		
		/// calls virtual OnInitialize()
		void Controller::Initialize()
		{
			OnInitialize();
		}

		/// performs Controller specific initialization. The default does nothing.
		void Controller::OnInitialize()
		{
			// nothing
		}
		

		// AddHandler adds a MessageHandler for nID to the map
		void Controller::AddHandler(
			UINT nID,			
			MessageHandler* p)	
		{
			MessageHandler* pPrev = GetHandler(nID);
			
			p->Initialize(this, pPrev);

			m_pImpl->theHandlerMap[nID] = p;
		}

		// AddHandler adds a MessageHandler for a range of IDs to the map
		void Controller::AddHandler(
			UINT nFirstID,		
			UINT nLastID,		
			MessageHandler* p)	
		{
			ASSERT(nFirstID < nLastID);

			for (UINT nIndex = nFirstID; nIndex <= nLastID; nIndex++)
			{
				AddHandler(nIndex, p);
			}
		}

		/// RemoveHandler removes the MessageHandler for nID
		void Controller::RemoveHandler(UINT nID)
		{
			m_pImpl->theHandlerMap.erase(nID);
		}

		/// RemoveHandler removes the MessageHandler for a range of IDs
		void Controller::RemoveHandler(
			UINT nFirstID,	
			UINT nLastID)	
		{
			ASSERT(nFirstID < nLastID);

			for (UINT nIndex = nFirstID; nIndex <= nLastID; nIndex++)
			{
				RemoveHandler(nIndex);
			}
		}

		///	GetHandler returns the stored handler for nID
		MessageHandler *Controller::GetHandler(UINT nID) const
		{
			MessageHandler* p = dynamic_cast<MessageHandler*>(m_pImpl->theHandlerMap[nID]);
			return p;
		}

	}
}

//*** Modification History ***
// $Log: /SbjDev/SbjCore/Controller.cpp $
// 
// 7     11/12/08 2:22p Steve
// Finished Generalization of Model  v2.0.1
// 
// 6     10/14/08 1:12p Steve
// Implemented Deletes