JavaFX 25 · javafx.event.EventTarget · APIdia, the JavaDoc alternative

Method Summary

Modifier and Type	Method and Description
public default < the event class of the filter E extends Event> void	addEventFilter(EventType<E> the type of the events received by the filter eventType, EventHandler<? super E> the event filter eventFilter) Registers an event filter for this target.
public default < the event class of the handler E extends Event> void	addEventHandler(EventType<E> the type of the events received by the handler eventType, EventHandler<? super E> the event handler eventHandler) Registers an event handler for this target.
public EventDispatchChain	Returns: the resulting event dispatch chain for this target buildEventDispatchChain(EventDispatchChain the initial chain to build from tail) Construct an event dispatch chain for this target.
public default < the event class of the filter E extends Event> void	removeEventFilter(EventType<E> the event type from which to unregister eventType, EventHandler<? super E> the event filter eventFilter) Unregisters a previously registered event filter from this target.
public default < the event class of the handler E extends Event> void	removeEventHandler(EventType<E> the event type from which to unregister eventType, EventHandler<? super E> the event handler eventHandler) Unregisters a previously registered event handler from this target.

Method Detail

addEventFilter back to summary

addEventFilter	back to summary
public default <E extends Event> void addEventFilter(EventType<E> eventType, EventHandler<? super E> eventFilter) Registers an event filter for this target. The filter is called when the target receives an `Event` of the specified type during the capturing phase of event delivery. Implementation Specification The default implementation of this method throws `UnsupportedOperationException`. Parameters <E> the event class of the filter eventType:EventType<E> the type of the events received by the filter eventFilter:EventHandler<? super E> the event filter Exceptions NullPointerException: if `eventType` or `eventFilter` is `null` UnsupportedOperationException: if this target does not support event filters Since 21

public default <E extends Event> void addEventFilter(EventType<E> eventType, EventHandler<? super E> eventFilter)

Registers an event filter for this target.

The filter is called when the target receives an Event of the specified type during the capturing phase of event delivery.

Implementation Specification

The default implementation of this method throws UnsupportedOperationException.

Parameters

<E>: the event class of the filter
eventType:EventType<E>: the type of the events received by the filter
eventFilter:EventHandler<? super E>: the event filter

Exceptions

NullPointerException:: if eventType or eventFilter is null
UnsupportedOperationException:: if this target does not support event filters

Since

addEventHandler back to summary

addEventHandler	back to summary
public default <E extends Event> void addEventHandler(EventType<E> eventType, EventHandler<? super E> eventHandler) Registers an event handler for this target. The handler is called when the target receives an `Event` of the specified type during the bubbling phase of event delivery. Implementation Specification The default implementation of this method throws `UnsupportedOperationException`. Parameters <E> the event class of the handler eventType:EventType<E> the type of the events received by the handler eventHandler:EventHandler<? super E> the event handler Exceptions NullPointerException: if `eventType` or `eventHandler` is `null` UnsupportedOperationException: if this target does not support event handlers Since 21

public default <E extends Event> void addEventHandler(EventType<E> eventType, EventHandler<? super E> eventHandler)

Registers an event handler for this target.

The handler is called when the target receives an Event of the specified type during the bubbling phase of event delivery.

Implementation Specification

The default implementation of this method throws UnsupportedOperationException.

Parameters

<E>: the event class of the handler
eventType:EventType<E>: the type of the events received by the handler
eventHandler:EventHandler<? super E>: the event handler

Exceptions

NullPointerException:: if eventType or eventHandler is null
UnsupportedOperationException:: if this target does not support event handlers

Since

buildEventDispatchChain back to summary

buildEventDispatchChain	back to summary
public EventDispatchChain buildEventDispatchChain(EventDispatchChain tail) Construct an event dispatch chain for this target. The event dispatch chain contains event dispatchers which might be interested in processing of events targeted at this `EventTarget`. This event target is not automatically added to the chain, so if it wants to process events, it needs to add an `EventDispatcher` for itself to the chain. In the case the event target is part of some hierarchy, the chain for it is usually built from event dispatchers collected from the root of the hierarchy to the event target. The event dispatch chain is constructed by modifications to the provided initial event dispatch chain. The returned chain should have the initial chain at its end so the dispatchers should be prepended to the initial chain. The caller shouldn't assume that the initial chain remains unchanged nor that the returned value will reference a different chain. Parameters tail:EventDispatchChain the initial chain to build from Returns:EventDispatchChain the resulting event dispatch chain for this target

public EventDispatchChain buildEventDispatchChain(EventDispatchChain tail)

Construct an event dispatch chain for this target. The event dispatch chain contains event dispatchers which might be interested in processing of events targeted at this EventTarget. This event target is not automatically added to the chain, so if it wants to process events, it needs to add an EventDispatcher for itself to the chain.

In the case the event target is part of some hierarchy, the chain for it is usually built from event dispatchers collected from the root of the hierarchy to the event target.

The event dispatch chain is constructed by modifications to the provided initial event dispatch chain. The returned chain should have the initial chain at its end so the dispatchers should be prepended to the initial chain.

The caller shouldn't assume that the initial chain remains unchanged nor that the returned value will reference a different chain.

Parameters

tail:EventDispatchChain: the initial chain to build from

Returns:EventDispatchChain

the resulting event dispatch chain for this target

removeEventFilter back to summary

removeEventFilter	back to summary
public default <E extends Event> void removeEventFilter(EventType<E> eventType, EventHandler<? super E> eventFilter) Unregisters a previously registered event filter from this target. Since it is possible to register a single `EventHandler` instance for different event types, the caller needs to specify the event type from which the filter should be unregistered. Implementation Specification The default implementation of this method throws `UnsupportedOperationException`. Parameters <E> the event class of the filter eventType:EventType<E> the event type from which to unregister eventFilter:EventHandler<? super E> the event filter Exceptions NullPointerException: if `eventType` or `eventFilter` is `null` UnsupportedOperationException: if this target does not support event filters Since 21

public default <E extends Event> void removeEventFilter(EventType<E> eventType, EventHandler<? super E> eventFilter)

Unregisters a previously registered event filter from this target.

Since it is possible to register a single EventHandler instance for different event types, the caller needs to specify the event type from which the filter should be unregistered.

Implementation Specification

The default implementation of this method throws UnsupportedOperationException.

Parameters

<E>: the event class of the filter
eventType:EventType<E>: the event type from which to unregister
eventFilter:EventHandler<? super E>: the event filter

Exceptions

NullPointerException:: if eventType or eventFilter is null
UnsupportedOperationException:: if this target does not support event filters

Since

removeEventHandler back to summary

removeEventHandler	back to summary
public default <E extends Event> void removeEventHandler(EventType<E> eventType, EventHandler<? super E> eventHandler) Unregisters a previously registered event handler from this target. Since it is possible to register a single `EventHandler` instance for different event types, the caller needs to specify the event type from which the handler should be unregistered. Implementation Specification The default implementation of this method throws `UnsupportedOperationException`. Parameters <E> the event class of the handler eventType:EventType<E> the event type from which to unregister eventHandler:EventHandler<? super E> the event handler Exceptions NullPointerException: if `eventType` or `eventHandler` is `null` UnsupportedOperationException: if this target does not support event handlers Since 21

public default <E extends Event> void removeEventHandler(EventType<E> eventType, EventHandler<? super E> eventHandler)

Unregisters a previously registered event handler from this target.

Since it is possible to register a single EventHandler instance for different event types, the caller needs to specify the event type from which the handler should be unregistered.

Implementation Specification

The default implementation of this method throws UnsupportedOperationException.

Parameters

<E>: the event class of the handler
eventType:EventType<E>: the event type from which to unregister
eventHandler:EventHandler<? super E>: the event handler

Exceptions

NullPointerException:: if eventType or eventHandler is null
UnsupportedOperationException:: if this target does not support event handlers

Since

public Interface EventTarget

Method Summary

Method Detail