signal on title colum of GtkTreeView

[Harobed <mailing harobed org>]

Hi,

I would like to show popup window when I click on title column of
TreeView.

My problem is than I don't success to define signal on title of column.

I added widget to title column, I defined signal on this widget but it's
not actived ! I don't understand.

Someone I've one exemple ?


Thanks
-- 
Stéphane KLEIN
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