[Glade-users] how to update process_bar in real time between multi-processes?

the problem is as below:                                                    

I have a main window with an Gtk_tree_view embedded in,every row of the gtk_tree_view has a process_bar,and 
now I want to update the process_bar in real time based on the data from a child process.How can I achieve 
this goal?
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