/*
* Copyright (c) 2000 World Wide Web Consortium,
* (Massachusetts Institute of Technology, Institut National de
* Recherche en Informatique et en Automatique, Keio University). All
* Rights Reserved. This program is distributed under the W3C's Software
* Intellectual Property License. This program is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY; without even
* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE.
* See W3C License http://www.w3.org/Consortium/Legal/ for more details.
*/
package org.w3c.dom.events;
/**
* The <code>Event</code> interface is used to provide contextual information
* about an event to the handler processing the event. An object which
* implements the <code>Event</code> interface is generally passed as the
* first parameter to an event handler. More specific context information is
* passed to event handlers by deriving additional interfaces from
* <code>Event</code> which contain information directly relating to the
* type of event they accompany. These derived interfaces are also
* implemented by the object passed to the event listener.
* <p>See also the <a href='http://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113'>Document Object Model (DOM) Level 2 Events Specification</a>.
* @since DOM Level 2
*/
public interface Event {
// PhaseType
/**
* The current event phase is the capturing phase.
*/
public static final short CAPTURING_PHASE = 1;
/**
* The event is currently being evaluated at the target
* <code>EventTarget</code>.
*/
public static final short AT_TARGET = 2;
/**
* The current event phase is the bubbling phase.
*/
public static final short BUBBLING_PHASE = 3;
/**
* The name of the event (case-insensitive). The name must be an XML name.
*/
public String getType();
/**
* Used to indicate the <code>EventTarget</code> to which the event was
* originally dispatched.
*/
public EventTarget getTarget();
/**
* Used to indicate the <code>EventTarget</code> whose
* <code>EventListeners</code> are currently being processed. This is
* particularly useful during capturing and bubbling.
*/
public EventTarget getCurrentTarget();
/**
* Used to indicate which phase of event flow is currently being
* evaluated.
*/
public short getEventPhase();
/**
* Used to indicate whether or not an event is a bubbling event. If the
* event can bubble the value is true, else the value is false.
*/
public boolean getBubbles();
/**
* Used to indicate whether or not an event can have its default action
* prevented. If the default action can be prevented the value is true,
* else the value is false.
*/
public boolean getCancelable();
/**
* Used to specify the time (in milliseconds relative to the epoch) at
* which the event was created. Due to the fact that some systems may
* not provide this information the value of <code>timeStamp</code> may
* be not available for all events. When not available, a value of 0
* will be returned. Examples of epoch time are the time of the system
* start or 0:0:0 UTC 1st January 1970.
*/
public long getTimeStamp();
/**
* The <code>stopPropagation</code> method is used prevent further
* propagation of an event during event flow. If this method is called
* by any <code>EventListener</code> the event will cease propagating
* through the tree. The event will complete dispatch to all listeners
* on the current <code>EventTarget</code> before event flow stops. This
* method may be used during any stage of event flow.
*/
public void stopPropagation();
/**
* If an event is cancelable, the <code>preventDefault</code> 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. If, during any stage of event flow, the
* <code>preventDefault</code> method is called the event is canceled.
* Any default action associated with the event will not occur. Calling
* this method for a non-cancelable event has no effect. Once
* <code>preventDefault</code> has been called it will remain in effect
* throughout the remainder of the event's propagation. This method may
* be used during any stage of event flow.
*/
public void preventDefault();
/**
* The <code>initEvent</code> method is used to initialize the value of an
* <code>Event</code> created through the <code>DocumentEvent</code>
* interface. This method may only be called before the
* <code>Event</code> has been dispatched via the
* <code>dispatchEvent</code> method, though it may be called multiple
* times during that phase if necessary. If called multiple times the
* final invocation takes precedence. If called from a subclass of
* <code>Event</code> interface only the values specified in the
* <code>initEvent</code> method are modified, all other attributes are
* left unchanged.
* @param eventTypeArgSpecifies the event type. This type may be any
* event type currently defined in this specification or a new event
* type.. The string must be an XML name. Any new event type must not
* begin with any upper, lower, or mixed case version of the string
* "DOM". This prefix is reserved for future DOM event sets. It is
* also strongly recommended that third parties adding their own
* events use their own prefix to avoid confusion and lessen the
* probability of conflicts with other new events.
* @param canBubbleArgSpecifies whether or not the event can bubble.
* @param cancelableArgSpecifies whether or not the event's default
* action can be prevented.
*/
public void initEvent(String eventTypeArg,
boolean canBubbleArg,
boolean cancelableArg);
}
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