I don't see official GWT how-to but I found how to set up the "plumbing" for custom events - I don't know if he uses best practices in this approach - but assuming he does - can Designer support putting together this sort of plumbing? Assuming this isn't a good way, does Designer support putting this linking together in any manner? PS: The fact I'm using a GWT-Ext widget shouldn't matter as the internal component catches whatever event happened and transforms it (in my case I turned it into a "AppSeesRowClicked" event (naming kept generic here).
For details on the approach I'm using, check, the following blog (http://www.itsolut.com/chrismusings/category/gwt/
) and go down the blog page a little ways and you'll find "Business Events with GWT 1.6" - this appears to work just fine (but again do not know if its GWT official approach).
So the basic question comes down to: please let us know how Designer supports or doesn't support "cross-component events" like this.