Example usage for org.w3c.dom.events EventTarget dispatchEvent

Introduction

In this page you can find the example usage for org.w3c.dom.events EventTarget dispatchEvent.

Prototype

public boolean dispatchEvent(Event evt) throws EventException;

Source Link

Document

This method allows the dispatch of events into the implementations event model.

Usage

From source file:de.betterform.xml.events.impl.DefaultXMLEventService.java

/**
 * Dispatches the specified event to the given target.
 *
 * @param target the event target./*from   ww w  .  j  a  va2  s  . co  m*/
 * @param type specifies the event type.
 * @param bubbles specifies wether the event can bubble.
 * @param cancelable specifies wether the event's default action can be prevented.
 * @param context optionally specifies contextual information.
 * @return <code>true</code> if one of the event listeners called
 * <code>preventDefault</code>, otherwise <code>false</code>.
 */
public boolean dispatch(EventTarget target, String type, boolean bubbles, boolean cancelable, Object context) {
    if (LOGGER.isDebugEnabled()) {
        if (target instanceof Node) {
            Node node = (Node) target;
            Object object = node.getUserData("");
            if (object instanceof XFormsElement) {
                //Note: the cast seems pointless here but makes sure the right toString method is called
                LOGGER.debug("dispatch event: " + type + " to " + ((XFormsElement) object).toString());
            }
        } else {
            LOGGER.debug("dispatch event: " + type + " to " + target);
        }
    }

    XMLEvent event = this.eventFactory.createXMLEvent(type);
    this.eventInitializer.initXMLEvent(event, type, bubbles, cancelable, context);

    long start;
    long end;

    start = System.currentTimeMillis();
    boolean preventDefault = target.dispatchEvent(event);
    end = System.currentTimeMillis();
    if (LOGGER.isTraceEnabled()) {
        LOGGER.trace("dispatch event: " + type + " handling needed " + (end - start) + " ms");
    }

    if (!event.getCancelable() || !preventDefault) {
        DefaultAction action = lookup(target, type);

        if (action != null) {
            if (LOGGER.isDebugEnabled()) {
                LOGGER.debug("dispatch event: " + type + " default action at " + action);
            }

            // todo: set event phase without downcast ?
            ((XercesXMLEvent) event).eventPhase = XMLEvent.DEFAULT_ACTION;
            start = System.currentTimeMillis();
            action.performDefault(event);
            end = System.currentTimeMillis();
            if (LOGGER.isTraceEnabled()) {
                LOGGER.trace("dispatch event: " + type + " default action needed " + (end - start) + " ms");
            }
        }
    }

    return preventDefault;
}

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From source file:org.chiba.xml.events.impl.DefaultXMLEventService.java

/**
 * Dispatches the specified event to the given target.
 *
 * @param target the event target./*from   w ww . j  a va  2s  .c o  m*/
 * @param type specifies the event type.
 * @param bubbles specifies wether the event can bubble.
 * @param cancelable specifies wether the event's default action can be prevented.
 * @param context optionally specifies contextual information.
 * @return <code>true</code> if one of the event listeners called
 * <code>preventDefault</code>, otherwise <code>false</code>.
 */
public boolean dispatch(EventTarget target, String type, boolean bubbles, boolean cancelable, Object context) {
    if (LOGGER.isDebugEnabled()) {
        if (target instanceof NodeImpl) {
            NodeImpl node = (NodeImpl) target;
            Object object = node.getUserData();
            if (object instanceof XFormsElement) {
                //Note: the cast seems pointless here but makes sure the right toString method is called
                LOGGER.debug("dispatch event: " + type + " to " + ((XFormsElement) object).toString());
            }
        } else {
            LOGGER.debug("dispatch event: " + type + " to " + target);
        }
    }

    XMLEvent event = this.eventFactory.createXMLEvent(type);
    this.eventInitializer.initXMLEvent(event, type, bubbles, cancelable, context);

    long start;
    long end;

    start = System.currentTimeMillis();
    boolean preventDefault = target.dispatchEvent(event);
    end = System.currentTimeMillis();
    if (LOGGER.isDebugEnabled()) {
        LOGGER.debug("dispatch event: " + type + " handling needed " + (end - start) + " ms");
    }

    if (!event.getCancelable() || !preventDefault) {
        DefaultAction action = lookup(target, type);

        if (action != null) {
            if (LOGGER.isDebugEnabled()) {
                LOGGER.debug("dispatch event: " + type + " default action at " + action);
            }

            // todo: set event phase without downcast ?
            ((XercesXMLEvent) event).eventPhase = XMLEvent.DEFAULT_ACTION;
            start = System.currentTimeMillis();
            action.performDefault(event);
            end = System.currentTimeMillis();
            if (LOGGER.isDebugEnabled()) {
                LOGGER.debug("dispatch event: " + type + " default action needed " + (end - start) + " ms");
            }
        }
    }

    return preventDefault;
}

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From source file:org.chiba.xml.xforms.Container.java

/**
 * Dispatches an Event of the specified type to the given eventType targetId.
 *
 * @param eventTarget the target Node for this Event
 * @param eventType   the type of Event/*from   w ww .j a  v  a 2 s . co  m*/
 * @param info        an additional info object
 * @return true, if Event was cancelled by an Listener
 */
public boolean dispatch(EventTarget eventTarget, String eventType, Object info) throws XFormsException {
    if (this.eventFactory == null) {
        this.eventFactory = new EventFactory();
    }

    Event event = EventFactory.createEvent(eventType, info);

    if (LOGGER.isDebugEnabled()) {
        LOGGER.debug("dispatching '" + event.getType() + "' to " + eventTarget);
    }

    boolean result = eventTarget.dispatchEvent(event);

    // exception during event flow ?
    if (this.eventException != null) {
        XFormsException xfe = null;

        if (this.eventException instanceof XFormsErrorIndication) {
            if (((XFormsErrorIndication) this.eventException).isFatal()) {
                // downcast fatal error for rethrowal
                xfe = (XFormsException) this.eventException;
            }
        } else {
            // wrap exception for rethrowal
            xfe = new XFormsException(this.eventException);
        }

        // remove exception in either case
        this.eventException = null;

        if (xfe != null) {
            throw xfe;
        }
    }

    return result;
}

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