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

#include "stdafx.h"
#include "WndMsgHandler.h"
#include "WndController.h"

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

namespace SbjCore
{
	namespace Mvc
	{
		WndMsgHandler::~WndMsgHandler()
		{
			
		}

		WndController* WndMsgHandler::GetController() const
		{
			return static_cast<WndController*>(MessageHandler::GetController());
		}			
		
		/** HandlePreDefault calls WndMsgHandler's protected pure virtual OnWndMsgPreDefault method.  
			HandlePreDefault is called by the WndController's HandleWndMsgPreDefault method and should never 
			be called directly.

			\return non zero if message is handled and no further action should be taken
		*/
		LRESULT WndMsgHandler::HandleWndMsg(
			WPARAM wParam,								///< wparam value for the message
			LPARAM lParam,								///< lparam value for the message
			LRESULT* pResult)							///< if not NULL, the return of the message
		{
			return OnHandleWndMsg(wParam, lParam, pResult);
		}	

		/** HandlePreDefaultPrev calls HandlePreDefault on the previous handler.  This should be called from
			the overridden OnWndMsgPreDefault method.

			\return true if message is handled
		*/
		bool WndMsgHandler::HandleWndMsgPrev(
			WPARAM wParam,								///< wparam value for the message
			LPARAM lParam,								///< lparam value for the message
			LRESULT* pResult)							///< if not NULL, the return of the message
		{
			bool bRslt = false;
			WndMsgHandler* pPrevHandler = (WndMsgHandler*)GetPrevHandler();
			if (pPrevHandler != NULL)
			{
				bRslt = pPrevHandler->HandleWndMsg(wParam, lParam, pResult);
			}
			return bRslt;
		}
		
		bool WndMsgHandler::CallDefaultFirst()
		{
			return OnCallDefaultFirst();
		}
		
		
		/** OnHandleWndMsg is the abstract handler method for processing prior to default processing. 

			OnHandleWndMsg must be overridden in the derived handler. A call to HandleWndMsgPrev 
			should be made to assure any previous handlers are called. This method is called by the 
			public HandlePreDefault method and should never be called directly.

			\param wparam value for the message
			\param lparam value for the message				
			\param pResult if not NULL, the result of for the message
			
			\return true if message is handled
		*/
		//virtual LRESULT WndMsgHandler::OnHandleWndMsg(WPARAM wParam, LPARAM lParam, LRESULT* pResult) = 0;	
		
		
		bool WndMsgHandler::OnCallDefaultFirst()
		{
			return false;
		}
			
	}
}