Set tool tip for title bar only in QMdiSubWindow

[fscibilia]

Hi,

I would like to set a tool tip showing a text (a filename in this case) for the title bar in a QMdiSubwindow (which contains a QTextEdit).
When I set tool tip for QMdiSubwindow, this is shown for the inner QTextEdit as well (this is frustrating when you edit).
How can I let the tool tip being shown when the user hovers the mouse on the title bar only ?

Thanks