def setup_slaves(self):
SellableItemSlave.setup_slaves(self)
self.discount_btn = self.slave.add_extra_button(label=_("Apply discount"))
self.discount_btn.set_sensitive(bool(len(self.slave.klist)))
self.slave.klist.connect('has-rows', self._on_klist__has_rows)
def setup_proxies(self):
SellableItemSlave.setup_proxies(self)
self._calc = CalculatorPopup(self.cost,
CalculatorPopup.MODE_SUB)
