Inheritance diagram for PicIcoRollOverButtonObserver:

Public Member Functions
	PicIcoRollOverButtonObserver (IPMUnknown *boss)

	~PicIcoRollOverButtonObserver ()

virtual void	AutoAttach ()

virtual void	AutoDetach ()

virtual void	Update (const ClassID &theChange, ISubject theSubject, const PMIID &protocol, void changedBy)

Public Member Functions inherited from CObserver
	CObserver (IPMUnknown *boss, PMIID interfaceID=IID_IOBSERVER)

IChangeManager *	GetChangeManager () const

virtual void	SetAttachIID (PMIID iid)

virtual PMIID	GetAttachIID () const

virtual void	SetEnabled (bool16 state)

virtual bool16	IsEnabled () const

virtual void	LazyUpdate (ISubject theSubject, const PMIID &protocol, const LazyNotificationData data)

Additional Inherited Members
Public Types inherited from IObserver
enum	{ kDefaultIID = IID_IOBSERVER }

Protected Attributes inherited from CObserver
bool16	fDetachSubjectsOnDelete

PMIID	fAttachIID

const UIDRef	fThisRef

bool16	fEnabled

Detailed Description

Adding an IObserver interface to a widget boss class creates a button whose presses can be registered as Update messages to the client code.

Constructor & Destructor Documentation

PicIcoRollOverButtonObserver::PicIcoRollOverButtonObserver ( IPMUnknown * boss )

Constructor

PicIcoRollOverButtonObserver::~PicIcoRollOverButtonObserver ( )

Destructor

void PicIcoRollOverButtonObserver::AutoAttach ( void )

virtual

AutoAttach is only called for registered observers of widgets. This method is called when the widget boss object is shown.

Reimplemented from CObserver.

void PicIcoRollOverButtonObserver::AutoDetach ( void )

virtual

AutoDetach is only called for registered observers of widgets. Called when the widget is hidden.

Reimplemented from CObserver.

void PicIcoRollOverButtonObserver::Update	(	const ClassID &	theChange,
		ISubject *	theSubject,
		const PMIID &	protocol,
		void *	changedBy
	)

virtual

Update is called for all registered observers, and is the method through which changes are broadcast.

Parameters

theChange	this is specified by the agent of change; it can be the class ID of the agent, or it may be some specialised message ID.
theSubject	this provides a reference to the object which has changed; in this case, the button widget boss object that is being observed.
protocol	the protocol along which the change occurred.
changedBy	this can be used to provide additional information about the change or a reference to the boss object that caused the change.

Implements IObserver.