Examples of org.w3c.dom.events.EventListener

org.w3c.dom.events.EventListener
The EventListener interface is the primary method for handling events. Users implement the EventListener interface and register their listener on an EventTarget using the AddEventListener method. The users should also remove their EventListener from its EventTarget after they have completed using the listener. @since DOM Level 2

        // remove all listeners added by Bridges
            Iterator iter = eventListenerSet.iterator();
        while (iter.hasNext()) {
            EventListenerMememto m = (EventListenerMememto)iter.next();
            EventTarget   et = m.getTarget();
            EventListener el = m.getListener();
            boolean       uc = m.getUseCapture();
            String        t  = m.getEventType();
            if ((et == null) || (el == null) || (t == null))
                continue;
            et.removeEventListener(t, el, uc);

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    class SVGScrollDocumentLoaderListener extends SVGDocumentLoaderAdapter {
        public void documentLoadingCompleted(SVGDocumentLoaderEvent e) {
            SVGSVGElement root = e.getSVGDocument().getRootElement();
            root.addEventListener
                (SVGConstants.SVG_SVGZOOM_EVENT_TYPE, 
                 new EventListener() {
                     public void handleEvent(Event evt) {
                         if (!(evt.getTarget() instanceof SVGSVGElement))
                             return;
                         // assert(evt.getType() == 
                         //        SVGConstants.SVG_SVGZOOM_EVENT_TYPE);

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            Iterator i = eventListenerSet.iterator();
            while (i.hasNext()) {
                EventListenerMememto elm = (EventListenerMememto)i.next();
                EventTarget   et = elm.getTarget();
                if (et == evtTarget) {
                    EventListener el = elm.getListener();
                    boolean       uc = elm.getUseCapture();
                    String        t  = elm.getEventType();
                    if ((et == null) || (el == null) || (t == null))
                        continue;
                    et.removeEventListener(t, el, uc);

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     * Updates the registration of a listener on the given element.
     */
    protected void updateScriptingListeners(Element elt, String attr) {
        String        domEvt   = (String)       attrToDOMEvent.get(attr);
        if (domEvt == null) return;  // Not an event attr.
        EventListener listener = (EventListener)attrToListener.get(attr);
        EventTarget   target   = (EventTarget)  elt;
        if (elt.hasAttributeNS(null, attr))
            target.addEventListener(domEvt, listener, false);
        else
            target.removeEventListener(domEvt, listener, false);

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        public Object call(Context ctx, Scriptable scope,
                           Scriptable thisObj, Object[] args) {
            NativeJavaObject njo = (NativeJavaObject)thisObj;
            if (args[1] instanceof Function) {
                EventListener evtListener = null;
                SoftReference sr = (SoftReference)listenerMap.get(args[1]);
                if (sr != null)
                    evtListener = (EventListener)sr.get();
                if (evtListener == null) {
                    evtListener = new FunctionEventListener
                        ((Function)args[1], interpreter);
                    listenerMap.put(args[1], new SoftReference(evtListener));
                }
                // we need to marshall args
                Class[] paramTypes = { String.class, Function.class,
                                       Boolean.TYPE };
                for (int i = 0; i < args.length; i++)
                    args[i] = Context.jsToJava(args[i], paramTypes[i]);
                ((EventTarget)njo.unwrap()).addEventListener
                    ((String)args[0], evtListener,
                     ((Boolean)args[2]).booleanValue());
                return Undefined.instance;
            }
            if (args[1] instanceof NativeObject) {
                EventListener evtListener = null;
                SoftReference sr = (SoftReference)listenerMap.get(args[1]);
                if (sr != null)
                    evtListener = (EventListener)sr.get();
                if (evtListener == null) {
                    evtListener = new HandleEventListener((Scriptable)args[1],

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            NativeJavaObject njo = (NativeJavaObject)thisObj;
            if (args[1] instanceof Function) {
                SoftReference sr = (SoftReference)listenerMap.get(args[1]);
                if (sr == null)
                    return Undefined.instance;
                EventListener el = (EventListener)sr.get();
                if (el == null)
                    return Undefined.instance;


                // we need to marshall args
                Class[] paramTypes = { String.class, Function.class,
                                       Boolean.TYPE };
                for (int i = 0; i < args.length; i++)
                    args[i] = Context.jsToJava(args[i], paramTypes[i]);
                ((EventTarget)njo.unwrap()).removeEventListener
                    ((String)args[0], el, ((Boolean)args[2]).booleanValue());
                return Undefined.instance;
            }
            if (args[1] instanceof NativeObject) {
                SoftReference sr = (SoftReference)listenerMap.get(args[1]);
                if (sr == null)
                    return Undefined.instance;
                EventListener el = (EventListener)sr.get();
                if (el == null)
                    return Undefined.instance;
                // we need to marshall args
                Class[] paramTypes = { String.class, Scriptable.class,
                                       Boolean.TYPE };

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            (EVENT_SCRIPT_DESCRIPTION,
             new Object [] {d.getURL(),
                            SVGConstants.SVG_ONLOAD_ATTRIBUTE,
                            new Integer(line)});


        EventListener l = new EventListener() {
                public void handleEvent(Event evt) {
                    try {
                        Object event;
                        if (evt instanceof ScriptEventWrapper) {
                            event = ((ScriptEventWrapper) evt).getEventObject();

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        public Object call(Context ctx, Scriptable scope,
                           Scriptable thisObj, Object[] args) {
            NativeJavaObject njo = (NativeJavaObject)thisObj;
            if (args[2] instanceof Function) {
                EventListener evtListener = new FunctionEventListener
                    ((Function)args[2], interpreter);
                listenerMap.put(args[2], new SoftReference(evtListener));
                // we need to marshall args
                Class[] paramTypes = { String.class, String.class,
                                       Function.class, Boolean.TYPE,
                                       Object.class };
                for (int i = 0; i < args.length; i++)
                    args[i] = Context.jsToJava(args[i], paramTypes[i]);
                AbstractNode target = (AbstractNode) njo.unwrap();
                target.addEventListenerNS
                    ((String)args[0],
                     (String)args[1],
                     evtListener,
                     ((Boolean)args[3]).booleanValue(),
                     args[4]);
                return Undefined.instance;
            }
            if (args[2] instanceof NativeObject) {
                EventListener evtListener =
                    new HandleEventListener((Scriptable)args[2], interpreter);
                listenerMap.put(args[2], new SoftReference(evtListener));
                // we need to marshall args
                Class[] paramTypes = { String.class, String.class,
                                       Scriptable.class, Boolean.TYPE,

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            NativeJavaObject njo = (NativeJavaObject)thisObj;
            if (args[2] instanceof Function) {
                SoftReference sr = (SoftReference)listenerMap.get(args[2]);
                if (sr == null)
                    return Undefined.instance;
                EventListener el = (EventListener)sr.get();
                if (el == null)
                    return Undefined.instance;
                // we need to marshall args
                Class[] paramTypes = { String.class, String.class,
                                       Function.class, Boolean.TYPE };
                for (int i = 0; i < args.length; i++)
                    args[i] = Context.jsToJava(args[i], paramTypes[i]);
                AbstractNode target = (AbstractNode) njo.unwrap();
                target.removeEventListenerNS
                    ((String)args[0],
                     (String)args[1],
                     el,
                     ((Boolean)args[3]).booleanValue());
                return Undefined.instance;
            }
            if (args[2] instanceof NativeObject) {
                SoftReference sr = (SoftReference)listenerMap.get(args[2]);
                if (sr == null)
                    return Undefined.instance;
                EventListener el = (EventListener)sr.get();
                if (el == null)
                    return Undefined.instance;
                // we need to marshall args
                Class[] paramTypes = { String.class, String.class,
                                       Scriptable.class, Boolean.TYPE };

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        } else {
            permissions = basePermissions;
        }


        EventTarget root = (EventTarget)document.getDocumentElement();
        root.addEventListener("SVGLoad", new EventListener() {
                public void handleEvent(Event evt){
                    SecurityManager sm = System.getSecurityManager();
                    int successCnt = 0;
                    Vector unexpectedDenial = new Vector();
                    int unexpectedDenialCnt = 0;

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