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        self.treeview_left = gtk.TreeView()
 
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        self.treeview_left.set_headers_visible(False)
 
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        self.treeview_left.connect("button-press-event", self.signal.on_treeview_left_button_press_event)
 
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        self.treeview_left.connect("row-activated", self.signal.on_treeview_left_row_activated)
 
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        self.scrolledwindow_left.add(self.treeview_left)