Set urgent hint on completion of tasks

[wen1987@…]

I find that there are currently three options concerning notification on task completion, but I do not have a system tray, and sounds and popups may be missed for various reasons.

Could you set the urgent windows hint on completion of tasks, and clear it when the window get focus? The urgent hint is specified by ICCCM (see  http://tronche.com/gui/x/icccm/sec-4.html), therefore most known windows managers should indicate this hint.