EventTargetImplpublic class EventTargetImpl extends Object implements EventTarget
| Fields Summary |
|---|
| private static final String | TAG | | private ArrayList | mListenerEntries | | private EventTarget | mNodeTarget |
| Constructors Summary |
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public EventTargetImpl(EventTarget target)
mNodeTarget = target;
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| Methods Summary |
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| public void | addEventListener(java.lang.String type, org.w3c.dom.events.EventListener listener, boolean useCapture)
if ((type == null) || type.equals("") || (listener == null)) {
return;
}
// Make sure we have only one entry
removeEventListener(type, listener, useCapture);
if (mListenerEntries == null) {
mListenerEntries = new ArrayList<EventListenerEntry>();
}
mListenerEntries.add(new EventListenerEntry(type, listener, useCapture));
| | public boolean | dispatchEvent(org.w3c.dom.events.Event evt)
// We need to use the internal APIs to modify and access the event status
EventImpl eventImpl = (EventImpl)evt;
if (!eventImpl.isInitialized()) {
throw new EventException(EventException.UNSPECIFIED_EVENT_TYPE_ERR,
"Event not initialized");
} else if ((eventImpl.getType() == null) || eventImpl.getType().equals("")) {
throw new EventException(EventException.UNSPECIFIED_EVENT_TYPE_ERR,
"Unspecified even type");
}
// Initialize event status
eventImpl.setTarget(mNodeTarget);
// TODO: At this point, to support event capturing and bubbling, we should
// establish the chain of EventTargets from the top of the tree to this
// event's target.
// TODO: CAPTURING_PHASE skipped
// Handle AT_TARGET
// Invoke handleEvent of non-capturing listeners on this EventTarget.
eventImpl.setEventPhase(Event.AT_TARGET);
eventImpl.setCurrentTarget(mNodeTarget);
if (!eventImpl.isPropogationStopped() && (mListenerEntries != null)) {
for (int i = 0; i < mListenerEntries.size(); i++) {
EventListenerEntry listenerEntry = mListenerEntries.get(i);
if (!listenerEntry.mUseCapture
&& listenerEntry.mType.equals(eventImpl.getType())) {
try {
listenerEntry.mListener.handleEvent(eventImpl);
}
catch (Exception e) {
// Any exceptions thrown inside an EventListener will
// not stop propagation of the event
Log.w(TAG, "Catched EventListener exception", e);
}
}
}
}
if (eventImpl.getBubbles()) {
// TODO: BUBBLING_PHASE skipped
}
return eventImpl.isPreventDefault();
| | public void | removeEventListener(java.lang.String type, org.w3c.dom.events.EventListener listener, boolean useCapture)
if (null == mListenerEntries) {
return;
}
for (int i = 0; i < mListenerEntries.size(); i ++) {
EventListenerEntry listenerEntry = mListenerEntries.get(i);
if ((listenerEntry.mUseCapture == useCapture)
&& (listenerEntry.mListener == listener)
&& listenerEntry.mType.equals(type)) {
mListenerEntries.remove(i);
break;
}
}
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