Trigger event on focus

I believe that what Greg was looking for was something to activate the trigger without selecting the object (using the keyboard or otherwise), just having it be "in focus" via the tab key.  That is what I'm looking for anyway.

I wouldn't exactly call it a critical feature, since for accessibility reasons you would not normally want to have something new appear onscreen without the user having done something explicitly to cause the change. But it would be helpful in my current project to have something like this in order to make a particular activity accessible.  And from what I understand of Greg's thread, it would be useful for simulating a form-entry.

I have been able to get satisfactory results using the 'key press' trigger and setting the key to be pressed as the 'tab' key.  It doesn't trigger quite when I want it to, and it doesn't work in reverse order (when tabbing backwards through the tab order). Assigning both tab and shift to activate the trigger on key-press doesn't seem to be accepted even though the trigger panel does let me enter the key combination.

All this is to say: thanks for the suggestion Leslie, but it doesn't meet my current need; it's an uncommon use case and there's lots of other feature requests that would take priority; and if anyone else is trying to do something similar, the key-press trigger has worked the best.