GtkTreeView how to keep selection

["Peter T. Mayer" <peter_t_mayer yahoo de>]

Hello,

When I have selected a row in a treeview the selected row is shown in 
different colors, but this visible selection disappears after the focus 
has changed. For instance if you reorder rows or click on an other 
widget, the selection is not any longer shown by different colors, 
although the selection is not changed as state (calling 
gtk_tree_selection_iter_is_selected() will return TRUE on this row).

Now I really like this visual feedback, is there a way how I can keep 
the changed colors, even when the focus changes? I don't know where to 
look for it at the moment, so every help would be appreciated.

Thanks, Peter!