javafx.beans

Interface InvalidationListener

All Known Implementing Classes:

WeakInvalidationListener

public interface InvalidationListener

An InvalidationListener is notified whenever an ObservableValue becomes invalid. It can be registered and unregistered with Observable.addListener(InvalidationListener) respectively Observable.removeListener(InvalidationListener)

For an in-depth explanation of invalidation events and how they differ from change events, see the documentation of ObservableValue.

The same instance of InvalidationListener can be registered to listen to multiple ObservableValues.

See Also:

ObservableValue

Method Summary

Methods

Modifier and Type	Method and Description
void	invalidated(Observable observable) This method needs to be provided by an implementation of InvalidationListener.

Method Detail

invalidated

void invalidated(Observable observable)

This method needs to be provided by an implementation of InvalidationListener. It is called if an ObservableValue becomes invalid.

In general is is considered bad practice to modify the observed value in this method.

Parameters:

observable - The ObservableValue that became invalid