org.w3c.dom.events
Interface Event

All Known Subinterfaces:

CustomEvent, KeyboardEvent, MouseEvent, MutationEvent, MutationNameEvent, ShadowTreeEvent, TextEvent, UIEvent

All Known Implementing Classes:

AbstractEvent, DOMCustomEvent, DOMKeyboardEvent, DOMMouseEvent, DOMMutationEvent, DOMMutationNameEvent, DOMTextEvent, DOMUIEvent, XBLOMShadowTreeEvent

public interface Event

The Event interface is used to provide contextual information about an event to the listener processing the event. An object which implements the Event interface is passed as the parameter to an EventListener. More specific context information is passed to event listeners by deriving additional interfaces from Event which contain information directly relating to the type of event they represent. These derived interfaces are also implemented by the object passed to the event listener.

To create an instance of the Event interface, use the DocumentEvent.createEvent("Event") method call.

See also the Document Object Model (DOM) Level 3 Events Specification .

Since:

DOM Level 2

CAPTURING_PHASE

public static final short CAPTURING_PHASE

The current event phase is the capture phase.

See Also:

Constant Field Values

AT_TARGET

public static final short AT_TARGET

The current event is in the target phase, i.e. it is being evaluated at the event target.

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Constant Field Values

BUBBLING_PHASE

public static final short BUBBLING_PHASE

The current event phase is the bubbling phase.

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Constant Field Values

getType

public String getType()

The local name of the event type. The name must be an NCName as defined in [XML Namespaces 1.1] and is case-sensitive.

getTarget

public EventTarget getTarget()

Used to indicate the event target. This attribute contains the target node when used with the .

getCurrentTarget

public EventTarget getCurrentTarget()

Used to indicate the EventTarget whose EventListeners are currently being processed. This is particularly useful during the capture and bubbling phases. This attribute could contain the target node or a target ancestor when used with the .

getEventPhase

public short getEventPhase()

Used to indicate which phase of event flow is currently being accomplished.

getBubbles

public boolean getBubbles()

Used to indicate whether or not an event is a bubbling event. If the event can bubble the value is true, otherwise the value is false.

getCancelable

public boolean getCancelable()

Used to indicate whether or not an event can have its default action prevented (see also ). If the default action can be prevented the value is true, otherwise the value is false .

getTimeStamp

public long getTimeStamp()

Used to specify the time at which the event was created in milliseconds relative to 1970-01-01T00:00:00Z. Due to the fact that some systems may not provide this information the value of timeStamp may be not available for all events. When not available, the value is 0.

stopPropagation

public void stopPropagation()

This method is used to prevent event listeners of the same group to be triggered but its effect is deferred until all event listeners attached on the Event.currentTarget have been triggered (see ). Once it has been called, further calls to that method have no additional effect.

Note: This method does not prevent the default action from being invoked; use Event.preventDefault() for that effect.

preventDefault

public void preventDefault()

If an event is cancelable, the preventDefault method is used to signify that the event is to be canceled, meaning any default action normally taken by the implementation as a result of the event will not occur (see also ), and thus independently of event groups. Calling this method for a non-cancelable event has no effect.

Note: This method does not stop the event propagation; use Event.stopPropagation() or Event.stopImmediatePropagation() for that effect.

initEvent

public void initEvent(String eventTypeArg,
                      boolean canBubbleArg,
                      boolean cancelableArg)

The initEvent method is used to initialize the value of an Event created through the DocumentEvent.createEvent method. This method may only be called before the Event has been dispatched via the EventTarget.dispatchEvent() method. If the method is called several times before invoking EventTarget.dispatchEvent, only the final invocation takes precedence. This method has no effect if called after the event has been dispatched. If called from a subclass of the Event interface only the values specified in this method are modified, all other attributes are left unchanged.
This method sets the Event.type attribute to eventTypeArg, and Event.namespaceURI to null. To initialize an event with a namespace URI, use the Event.initEventNS() method.

Parameters:

eventTypeArg - Specifies Event.type, the local name of the event type.

canBubbleArg - Specifies Event.bubbles. This parameter overrides the intrinsic bubbling behavior of the event.

cancelableArg - Specifies Event.cancelable. This parameter overrides the intrinsic cancelable behavior of the event.

getNamespaceURI

public String getNamespaceURI()

The namespace URI associated with this event at creation time, or null if it is unspecified.
For events initialized with a DOM Level 2 Events method, such as Event.initEvent(), this is always null.

Since:

DOM Level 3

stopImmediatePropagation

public void stopImmediatePropagation()

This method is used to prevent event listeners of the same group to be triggered and, unlike Event.stopPropagation() its effect is immediate (see ). Once it has been called, further calls to that method have no additional effect.

Note: This method does not prevent the default action from being invoked; use Event.preventDefault() for that effect.

Since:

DOM Level 3

getDefaultPrevented

public boolean getDefaultPrevented()

Used to indicate whether Event.preventDefault() has been called for this event.

Since:

DOM Level 3

initEventNS

public void initEventNS(String namespaceURIArg,
                        String eventTypeArg,
                        boolean canBubbleArg,
                        boolean cancelableArg)

The initEventNS method is used to initialize the value of an Event object and has the same behavior as Event.initEvent().

Parameters:

namespaceURIArg - Specifies Event.namespaceURI, the namespace URI associated with this event, or null if no namespace.

eventTypeArg - Refer to the Event.initEvent() method for a description of this parameter.

canBubbleArg - Refer to the Event.initEvent() method for a description of this parameter.

cancelableArg - Refer to the Event.initEvent() method for a description of this parameter.

Since:

DOM Level 3