messageCallbackManager.h

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/*********************************************************************
** Copyright (c) 1998 MaK Technologies, Inc.
** All rights reserved.
*********************************************************************/
/*********************************************************************
** $RCSfile: messageCallbackManager.h,v $ $Revision: 1.4 $ $State: Exp $
*********************************************************************/

#ifndef DtMessageCallbackManager_H_
#define DtMessageCallbackManager_H_


#include <list>
#include <map>
#include <vlutil/vlExceptions.h>


template <typename T_Message, typename T_MessageKind>
class DtMessageCallbackManager
{
public:

   typedef void (*DtCallbackFcn)(const T_Message& msg, void* userData);

protected:
   //DDW: Would have liked to have used simple struct with named members here,
   //but vc7 complained about missing a == operator in list remove operation
   typedef std::pair<DtCallbackFcn, void*> DtCallbackInfo;
   typedef std::list<DtCallbackInfo> DtCallbackList;
   typedef std::map<T_MessageKind, DtCallbackList> DtCallbackMap;

public:

   DtMessageCallbackManager();

   DtMessageCallbackManager(const DtMessageCallbackManager& orig);

   ~DtMessageCallbackManager();

   DtMessageCallbackManager& operator=(const DtMessageCallbackManager& orig);

   //
   void addMsgCallback(T_MessageKind k, 
      DtCallbackFcn fcn, void* userData);

   void removeMsgCallback(T_MessageKind k, 
      DtCallbackFcn fcn, void* userData);

   void addWildcardMsgCallback(DtCallbackFcn fcn, void* userData);

   void removeWildcardMsgCallback(DtCallbackFcn fcn, void* userData);

   void processMsg(const T_Message& msg) const;

   int numCallbacks(T_MessageKind k);


protected:

   DtCallbackMap myCallbacks;

   DtCallbackList myWildcardCallbacks;

};

#include "messageCallbackManager.inl"

#endif