Thanks to the other "is there a signal?" question, that reminded me I have
been looking for a signal (or way) to detect when the user has the mouse over
the titlebar of the main window in an editor where I would like to activate a
tooltip showing the absolute path for the file in the currently focused
textview. I just cannot find a signal or event window scheme to do it --
probably because the main window titlebar is owned by the window manager and
not the application. But still, I see other editors that are capable of this.

  Is there any such signal, or something that can be used in conjunction with
the set_window_title call that would also provide a tooltip on mouseover I
could respond to?

David C. Rankin, J.D.,P.E.
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