Re: Event Bubbling

You can use a global EventBus: http://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/event/shared/SimpleEventBus.html

and just have only the widgets that need to listen for particular events (you can add custom events for any situation) register with the global EventBus 

Sorry if this doesn't answer your question or only presents things you already know. 

I have sometimes used the exact same idea to create custom "local" eventBus that handle event notification within certain areas. 

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