ag-odalaunch/src/event_handler.h

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// Emacs style mode select   -*- C++ -*- 
//-----------------------------------------------------------------------------
//
// $Id: event_handler.h 2163 2011-05-07 19:44:07Z hypereye $
//
// Copyright (C) 2006-2010 by The Odamex Team.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// DESCRIPTION:
//      Handle Registration of C++ Class Member Event Handlers with Agar Events
//
// AUTHORS:
//       Michael Wood (mwoodj at huntsvegas dot org)
//
//-----------------------------------------------------------------------------

#ifndef _EVENT_HANDLER_H
#define _EVENT_HANDLER_H

#include <list>

#include <agar/core.h>

namespace agOdalaunch {

#ifndef CALL_MEMBER_FN
#define CALL_MEMBER_FN(object,ptrToMember)  ((object).*(ptrToMember))
#endif

class ODA_EventRegister;
class EventHandler;

typedef void (ODA_EventRegister::*EVENT_FUNC_PTR)(AG_Event *);

void EventReceiver(AG_Event *event);

class ODA_EventRegister
{
public:
        ~ODA_EventRegister();

        EventHandler *RegisterEventHandler(EVENT_FUNC_PTR funcPtr);

        bool DeleteEventHandler(EventHandler *handler);

private:
        std::list<EventHandler*> HandlerList;
};

class EventHandler
{
public:
        EventHandler(ODA_EventRegister *classPtr, EVENT_FUNC_PTR funcPtr)
                { ThisPtr = classPtr, FuncPtr = funcPtr; }

        ~EventHandler() {};

        void Trigger(AG_Event *event)
                { CALL_MEMBER_FN(*ThisPtr, FuncPtr)(event); }

private:
        EVENT_FUNC_PTR     FuncPtr;
        ODA_EventRegister *ThisPtr;
};

} // namespace

#endif