diff options
Diffstat (limited to 'gcc-4.4.3/libjava/classpath/external/w3c_dom/org/w3c/dom/events/EventTarget.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/external/w3c_dom/org/w3c/dom/events/EventTarget.java | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/external/w3c_dom/org/w3c/dom/events/EventTarget.java b/gcc-4.4.3/libjava/classpath/external/w3c_dom/org/w3c/dom/events/EventTarget.java new file mode 100644 index 000000000..f07663660 --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/external/w3c_dom/org/w3c/dom/events/EventTarget.java @@ -0,0 +1,102 @@ +/* + * 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>EventTarget</code> interface is implemented by all + * <code>Nodes</code> 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 <code>Node</code> + * interface. The interface allows registration and removal of + * <code>EventListeners</code> on an <code>EventTarget</code> and dispatch + * of events to that <code>EventTarget</code>. + * <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 EventTarget { + /** + * This method allows the registration of event listeners on the event + * target. If an <code>EventListener</code> is added to an + * <code>EventTarget</code> 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. + * <br> If multiple identical <code>EventListener</code>s are registered + * on the same <code>EventTarget</code> with the same parameters the + * duplicate instances are discarded. They do not cause the + * <code>EventListener</code> to be called twice and since they are + * discarded they do not need to be removed with the + * <code>removeEventListener</code> method. + * @param type The event type for which the user is registering + * @param listener The <code>listener</code> parameter takes an interface + * implemented by the user which contains the methods to be called + * when the event occurs. + * @param useCapture If true, <code>useCapture</code> indicates that the + * user wishes to initiate capture. After initiating capture, all + * events of the specified type will be dispatched to the registered + * <code>EventListener</code> before being dispatched to any + * <code>EventTargets</code> beneath them in the tree. Events which + * are bubbling upward through the tree will not trigger an + * <code>EventListener</code> designated to use capture. + */ + public void addEventListener(String type, + EventListener listener, + boolean useCapture); + + /** + * This method allows the removal of event listeners from the event + * target. If an <code>EventListener</code> is removed from an + * <code>EventTarget</code> while it is processing an event, it will not + * be triggered by the current actions. <code>EventListener</code>s can + * never be invoked after being removed. + * <br>Calling <code>removeEventListener</code> with arguments which do + * not identify any currently registered <code>EventListener</code> on + * the <code>EventTarget</code> has no effect. + * @param type Specifies the event type of the <code>EventListener</code> + * being removed. + * @param listener The <code>EventListener</code> parameter indicates the + * <code>EventListener </code> to be removed. + * @param useCapture Specifies whether the <code>EventListener</code> + * being removed was registered as a capturing listener or not. If a + * listener was registered twice, one with capture and one without, + * each must be removed separately. Removal of a capturing listener + * does not affect a non-capturing version of the same listener, and + * vice versa. + */ + public void removeEventListener(String type, + EventListener listener, + boolean useCapture); + + /** + * 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 + * <code> EventTarget</code> on which <code>dispatchEvent</code> is + * called. + * @param evt Specifies the event type, behavior, and contextual + * information to be used in processing the event. + * @return The return value of <code>dispatchEvent</code> indicates + * whether any of the listeners which handled the event called + * <code>preventDefault</code>. If <code>preventDefault</code> was + * called the value is false, else the value is true. + * @exception EventException + * UNSPECIFIED_EVENT_TYPE_ERR: Raised if the <code>Event</code>'s type + * was not specified by initializing the event before + * <code>dispatchEvent</code> was called. Specification of the + * <code>Event</code>'s type as <code>null</code> or an empty string + * will also trigger this exception. + */ + public boolean dispatchEvent(Event evt) + throws EventException; + +} |