SelectionObserver.h

//========================================================================================
// 
// $File$
// 
// Owner: Michael Martz
// 
// $Author$
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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
// this file from a source other than Adobe, then your use, modification, or 
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#ifndef __SELECTION_OBSERVER__
#define __SELECTION_OBSERVER__

#include "CObserver.h"

class ISelectionManager;
class ISelectionMessage;
class IControlView;

class ActiveSelectionObserver : public CObserver
{
public:
 ActiveSelectionObserver(IPMUnknown *boss, PMIID observerIID = IID_IOBSERVER);
 virtual ~ActiveSelectionObserver();

 virtual void AutoAttach();

 virtual void AutoDetach();

 virtual void Update(const ClassID& c, ISubject*, const PMIID& p, void* v);

protected:
 //........................................................................................
 // Methods to be overridden by most subclasses
 //........................................................................................
 virtual void HandleSelectionChanged(const ISelectionMessage* /*m*/) {}

 virtual void HandleFrequentSelectionChanged() {}

 virtual void HandleSelectionAttributeChanged(const ISelectionMessage* /*m*/) {}

protected:
 //........................................................................................
 // Methods to be overridden by some subclasses
 //........................................................................................
 virtual void AttachToSelectionSubject(ISubject* selectionSubject);

 virtual void DetachFromSelectionSubject(ISubject* selectionSubject);

 virtual void HandleActiveSelectionChanged();

 virtual void HandleSelectionUpdate(const ClassID& c, ISubject* s, const PMIID& p, void* v);

 virtual IPMUnknown* QueryAbstractSelection(const PMIID& p);

 virtual void AttachToActiveSelection();

 virtual void DetachFromActiveSelection();

protected:
 PMIID fObserverIID;
 ISelectionManager* fCurrentSelection;
};

class SelectionHighlightObserver : public CObserver
{
public:
 SelectionHighlightObserver(IPMUnknown *boss, PMIID observerIID = IID_IOBSERVER);

 virtual void AutoAttach(); 

 virtual void AutoDetach();

 virtual void Update(const ClassID& c, ISubject* s, const PMIID& p, void* v);

protected:
 virtual void AttachToSelectionSubject(ISubject* selectionSubject);

 virtual void DetachFromSelectionSubject(ISubject* selectionSubject);

 IPMUnknown* QueryAbstractSelection(const PMIID& p);

 virtual IControlView* QueryControlView() = 0; 

protected:
 PMIID fObserverIID;
 ISelectionManager* fCurrentSelection;
};

#endif // __SELECTION_OBSERVER__