88 lines
2 KiB
C
88 lines
2 KiB
C
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/*
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* REVISIONS:
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* pcy30Nov92: Added header
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* pcy21Apr93: Added method to get list and re register
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* cad27Sep93: Add now return error code
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* cad28Sep93: Made sure destructor(s) virtual
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*/
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#ifndef __DISPATCH_H
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#define __DISPATCH_H
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#include "apc.h"
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//
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// Defines
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//
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_CLASSDEF(Dispatcher)
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_CLASSDEF(EventNode)
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//
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// Implementation uses
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//
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#include "update.h"
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#include "list.h"
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//
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// Interface uses
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//
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_CLASSDEF(Event)
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class EventNode : public UpdateObj
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{
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protected:
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PList theUpdateList;
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INT theEventCode;
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public:
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EventNode(INT anEventCode,PUpdateObj anUpdateObj);
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virtual ~EventNode();
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virtual INT Update(PEvent anEvent);
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virtual INT IsA() const{return EVENTNODE;};
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virtual INT RegisterEvent(INT, PUpdateObj) {return 0;};
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virtual INT UnregisterEvent(INT, PUpdateObj) {return 0;};
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virtual INT Add(PUpdateObj anUpdateObj);
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virtual INT GetEventCode() { return theEventCode; };
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virtual INT GetCount() { return theUpdateList->GetItemsInContainer(); };
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virtual VOID Detach (PUpdateObj anUpdateObj);
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};
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/************************* DISPATCHER *****************************/
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// Dispatcher _cannot_ inherit from UpdateObj since UpdateObj has a dispatcher
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// as a data member. If the Dispatcher class inherits from UpdateObj, then
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// the construction of an UpdateObj leads to an infinite loop of the
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// UpdateObj constructor calling the Dispatcher constructor which turns around
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// and calls the UpdateObj constructor.
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class Dispatcher : public Obj {
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private:
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PList theDispatchEntries;
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public:
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Dispatcher();
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virtual ~Dispatcher();
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virtual INT RegisterEvent(INT id,PUpdateObj anUpdateObj);
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virtual INT UnregisterEvent(INT id,PUpdateObj anUpdateObj);
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virtual INT Update(PEvent anEvent);
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virtual INT RefreshEventRegistration(PUpdateObj anUpdater,
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PUpdateObj aRegistrant);
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virtual PList GetDispatchList() { return theDispatchEntries; };
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virtual INT GetRegisteredCount(INT id);
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};
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#endif
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