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

//------------------------------------------------------------------------------
// $Workfile: EventMgr.h $
// $Header: /SbjDev/SbjCore/EventMgr.h 4     10/20/08 11:06a Steve $
//
//	Copyright � 2008 SbjCat
// All rights reserved.
//
//
// *** Authors ***
//	 Steve Johnson
//
// $Revision: 4 $
//
//-----------------------------------------------------------------------------

#pragma once

#define DECLARE_EVENT_ID(name, guid) DECLARE_USER_MESSAGE(name, guid)

namespace SbjCore
{
	namespace EventMgr
	{
		class Event;
		class EventHandler;
		
		typedef UINT EventID;
		
		///////////////////////////////////////////////////////////
		
		AFX_EXT_API void Fire(EventID nEventID);
		AFX_EXT_API void Fire(EventID nEventID);
		
		///////////////////////////////////////////////////////////

		struct EventImpl;

		class AFX_EXT_CLASS Event
		{
		public:
			Event();
			Event(EventID nEventID, bool bAutoFire = true);
			
			virtual ~Event();
		
		public:
			void Init(EventID nEventID, bool bAutoFire = true);
		
			void NotifyHandlers();
		
		private:
			struct EventImpl* const m_pImpl;
		};

		/////////////////////////////////////////////////////////////

		struct EventHandlerImpl;

		class AFX_EXT_CLASS EventHandler
		{
		public:
			EventHandler(EventID nEventID);
			
			virtual ~EventHandler();
		
		public:
			void SetBlock(bool bBlock);
			bool IsBlocked() const;

			void Handle(Event* pEvent);

		private:
			virtual void OnHandle(Event* pEvent) = 0;

		private:
			struct EventHandlerImpl* const m_pImpl;
		};
		/////////////////////////////////////////////////////////////
		
		typedef CUserException AbortException;
	}
}

//*** Modification History ***
// $Log: /SbjDev/SbjCore/EventMgr.h $
// 
// 4     10/20/08 11:06a Steve
// Removed source parameter from Event and replaced with EventT data
// 
// 3     10/14/08 1:12p Steve
// Implemented Deletes