Sort a treeview by program

[Jacob Georg Benz <post hauslandbibliothek de>]

Hello everybody

I have treeview, to which I have add a sort option like it is described here: 
http://developer.gnome.org/gtkmm-tutorial/2.24/sec-treeview-sort.html.en

This does function really well, but the sort process has to be started by the 
user, clicking on the treeview-header. My querstion ist now, if there is any 
command to start the sorting by code line.

Thanks
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