IObserver.h

//========================================================================================
// 
// $File$
// 
// Owner: Lonnie Millett
// 
// $Author$
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// $DateTime$
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// Copyright 1997-2010 Adobe Systems Incorporated. All rights reserved.
// 
// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance 
// with the terms of the Adobe license agreement accompanying it. If you have received
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//========================================================================================

#ifndef __IOBSERVER__
#define __IOBSERVER__

#include "ShuksanID.h"

class ISubject;
class LazyNotificationData;

//----------------------------------------------------------------------------------------
// Class IObserver
//----------------------------------------------------------------------------------------

class INTERFACE_DECL IObserver : public IPMUnknown
{
 public:
 enum { kDefaultIID = IID_IOBSERVER };

 virtual void Update(const ClassID& theChange, ISubject* theSubject, const PMIID &protocol, void* changedBy) = 0;
 
 virtual void AutoAttach() = 0;
 
 virtual void AutoDetach() = 0;

 virtual void SetAttachIID(PMIID iid) = 0;

 virtual PMIID GetAttachIID() const = 0;
 
 virtual void SetEnabled(bool16 state) = 0;
 
 virtual bool16 IsEnabled() const = 0;

 virtual void LazyUpdate(ISubject* theSubject, const PMIID &protocol, const LazyNotificationData* data) = 0;
};

#endif