def perform(self, event):
items = Machine.assembler_list
dlg = ListReorderDialog(event.task.window.control,
Machine.assembler_list, lambda a: a['name'],
prompt_for_assembler, "Manage Assemblers")
if dlg.ShowModal() == wx.ID_OK:
asms = dlg.get_items()
Machine.set_assembler_list(event.task, asms)
self.viewer.machine.verify_current_assembler()
dlg.Destroy()
