CdlChtUIWidgetObserver Class Reference

Inheritance diagram for CdlChtUIWidgetObserver:

Public Member Functions
	CdlChtUIWidgetObserver (IPMUnknown *boss)
	~CdlChtUIWidgetObserver ()
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

Provides the capability to observe the widgets on the panel and respond appropriately to changes in their state.

Constructor & Destructor Documentation

Binds the C implementation class onto its ImplementationID making the C code callable by the application * CdlChtUIWidgetObserver::CdlChtUIWidgetObserver

(

IPMUnknown *

boss

)

Constructor

Parameters

boss	IN interface ptr from boss object on which this interface is aggregated.

CdlChtUIWidgetObserver::~CdlChtUIWidgetObserver

(

)

Destructor. Performs cleanup.

Member Function Documentation

void CdlChtUIWidgetObserver::AutoAttach ( void  )

virtual

AutoAttach is only called for registered observers of widgets. This method is called by the application core when the widget is shown.

Reimplemented from CObserver.

void CdlChtUIWidgetObserver::AutoDetach ( void  )

virtual

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

Reimplemented from CObserver.

void CdlChtUIWidgetObserver::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	IN 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	IN this provides a reference to the object which has changed; in this case, the button widget boss object that is being observed.
protocol	IN the protocol along which the change occurred.
changedBy	IN this can be used to provide additional information about the change or a reference to the boss object that caused the change.

Implements IObserver.