Public Member Functions
	DataObserver (const ImageHandle &d)
	DataObserver (const DataObserver &o)
DataObserver &	operator= (const DataObserver &o)
virtual	~DataObserver ()
virtual void	ObserverUpdate ()
virtual void	ObserverUpdate (const Extent &)
virtual void	ObserverUpdate (const Point &)
virtual void	ObserverRelease ()=0
void	ObserverInvalidate ()
virtual const ImageHandle &	GetObservedData () const
bool	IsDataValid () const

Protected Member Functions
void	SetObservedData (const ImageHandle &d)
bool	is_valid () const

Detailed Description

Abstract base class of data observer.

Definition at line 59 of file data_observer.hh.

Constructor & Destructor Documentation

DataObserver ( const ImageHandle & d )

constructor

requires reference to data, then attaches itself to data

DataObserver ( const DataObserver & o )

virtual ~DataObserver ( )

virtual

virtual const ImageHandle& GetObservedData ( ) const

virtual

Returns data that is observed.

bool is_valid ( ) const

protected

bool IsDataValid ( ) const

inline

Definition at line 96 of file data_observer.hh.

void ObserverInvalidate ( )

Called after ObserverRelease.

virtual void ObserverRelease ( )

pure virtual

Called if data is released from memory.

virtual void ObserverUpdate ( )

virtual

called upon data change, noop by default

virtual void ObserverUpdate ( const Extent & )

virtual

special update, calls ObserverUpdate() by default

virtual void ObserverUpdate ( const Point & )

virtual

special update, calls ObserverUpdate() by default

DataObserver& operator= ( const DataObserver & o )

void SetObservedData ( const ImageHandle & d )

protected

Set new data to observe.

Automatically unregister previously observed data

The documentation for this class was generated from the following file: