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/*
* DNN - Data News Network
*
* by Stephane Chatty
*
* Copyright 1993-1994
* Centre d'Etudes de la Navigation Aerienne (CENA)
*
* Event triggers.
*
* $Id$
* $CurLog$
*/
#ifndef DnnTrigger_H_
#define DnnTrigger_H_
#ifdef __GNUG__
#pragma interface
#endif
#include "cplus_bugs.h"
#include "ccu/List.h"
class DnnReaction;
class DnnWindow;
class DnnEvent;
class DnnTrigger {
friend class DnnBaseReaction;
private:
DnnTrigger (const DnnTrigger&);
DnnTrigger& operator = (const DnnTrigger&);
protected:
CcuListOf <DnnBaseReaction> Subscribers;
CcuListOf <DnnBaseReaction> Grabs;
void Subscribe (DnnBaseReaction&);
void Unsubscribe (DnnBaseReaction&);
void Grab (DnnBaseReaction&);
void Release (DnnBaseReaction&);
public:
DnnTrigger ();
~DnnTrigger ();
inline const CcuListOf <DnnBaseReaction>& GetSubscribers () const { return Subscribers; }
void Dispatch (DnnEvent&);
};
#endif /* DnnTrigger_H_ */
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