XUL tree views and "PerformAction" again

YuLo <[email protected]>
Newsgroups gmane.comp.mozilla.devel.xpfe
Message-ID <[email protected]> 
I made XPCOM(c++) implementing nsITreeView interface.
I can create its instance in JavaScript and then call method PerformAction("..."). Sure, it works.

But can it be done automatically when i press some keys, for instance "Delete"?

I have some tree widgets in a window, it could be fine if XULRUNNER call "PerformAction" of the focussed widget.
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