So tracing the fireEvent method, I found that the source does indeed
reference the button, but in HandlerManager, the source gets changed
to SimpleWidget.
Object oldSource = event.getSource(); //event.getSouce is button
event.setSource(source); //here source is SimpleWidget
Not sure why.
the full method.
/**
* Fires the given event to the handlers listening to the event's
type.
*
* Note, any subclass should be very careful about overriding this
method, as
* adds/removes of handlers will not be safe except within this
* implementation.
*
* @param event the event
*/
public void fireEvent(GwtEvent<?> event) {
// If it not live we should revive it.
if (!event.isLive()) {
event.revive();
}
Object oldSource = event.getSource();
event.setSource(source);
try {
firingDepth++;
registry.fireEvent(event, isReverseOrder);
} finally {
firingDepth--;
if (firingDepth == 0) {
handleQueuedAddsAndRemoves();
}
}
if (oldSource == null) {
// This was my event, so I should kill it now that I'm done.
event.kill();
} else {
// Restoring the source for the next handler to use.
event.setSource(oldSource);
}
}
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