org.w3c.dom.events
Interface EventTarget

All Known Implementing Classes:

XMLDocument, XMLNode

public interface EventTarget

The EventTarget interface is implemented by all Nodes in an implementation which supports the DOM Event Model. Therefore, this interface can be obtained by using binding-specific casting methods on an instance of the Node interface. The interface allows registration and removal of EventListeners on an EventTarget and dispatch of events to that EventTarget.

See also the Document Object Model (DOM) Level 2 Events Specification.

Since:

DOM Level 2

Method Summary

void	addEventListener(java.lang.String type, EventListener listener, boolean useCapture) This method allows the registration of event listeners on the event target.
boolean	dispatchEvent(Event evt) This method allows the dispatch of events into the implementations event model.
void	removeEventListener(java.lang.String type, EventListener listener, boolean useCapture) This method allows the removal of event listeners from the event target.

Method Detail

addEventListener

public void addEventListener(java.lang.String type,
                             EventListener listener,
                             boolean useCapture)

This method allows the registration of event listeners on the event target. If an EventListener is added to an EventTarget while it is processing an event, it will not be triggered by the current actions but may be triggered during a later stage of event flow, such as the bubbling phase.
If multiple identical EventListeners are registered on the same EventTarget with the same parameters the duplicate instances are discarded. They do not cause the EventListener to be called twice and since they are discarded they do not need to be removed with the removeEventListener method.

removeEventListener

public void removeEventListener(java.lang.String type,
                                EventListener listener,
                                boolean useCapture)

This method allows the removal of event listeners from the event target. If an EventListener is removed from an EventTarget while it is processing an event, it will not be triggered by the current actions. EventListeners can never be invoked after being removed.
Calling removeEventListener with arguments which do not identify any currently registered EventListener on the EventTarget has no effect.

dispatchEvent

public boolean dispatchEvent(Event evt)
                      throws EventException

This method allows the dispatch of events into the implementations event model. Events dispatched in this manner will have the same capturing and bubbling behavior as events dispatched directly by the implementation. The target of the event is the EventTarget on which dispatchEvent is called.

Returns:

The return value of dispatchEvent indicates whether any of the listeners which handled the event called preventDefault. If preventDefault was called the value is false, else the value is true.

Throws:

EventException - UNSPECIFIED_EVENT_TYPE_ERR: Raised if the Event's type was not specified by initializing the event before dispatchEvent was called. Specification of the Event's type as null or an empty string will also trigger this exception.