[pygtk] FileChooserButton - signal when the dialog closes

[Jamie Norrish]

Hi there. Back in February Felix Rabe asked about how to know when a
FileChooserButton's associated dialog is closed (so that the filename
of the selected file can be retrieved from it). As far as I can see,
there was no particular response. Having now stumbled upon the same
issue, does anyone have any answers?

As Felix noted, the file-activated signal does not appear to be the
correct one - I could not get it to fire no matter what I did in the
dialog - and the documentation is not forthcoming about what one
should use, only that one shouldn't normally need to connect to any of
the signals (!).

Jamie
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