def __on_delete_state(self, event): """Ask to confirm the state deletion and delete it if so""" state_name = self.list_states.GetStringSelection() if state_name != "": msg = "Deleting a state cannot be undone.\n" msg = msg + "Are you sure that you want to delete the " msg = msg + "'" + state_name + "' state?" result = cjr.warn_yes_no(self, msg) if result == wx.ID_YES: # Delete all transition targets pointing to the state to be deleted state = self.__get_current_state() fsm_ = fsm.get_fsm_of_state( state.getfullname() ) states = fsm.get_states( fsm_ ) for s in states: transitions = fsm.get_transitions(s) for t in transitions: t_obj = pynebula.lookup(t) t_obj.removetarget(state) # Delete the transition if it's emmpty after deleting the target if t_obj.gettargetsnumber() == 0: s_obj = pynebula.lookup(s) s_obj.deletetransition(t_obj) t_obj = None # Delete the state self.__get_fsm().deletestate( state ) state = None self.list_states.Delete( self.list_states.GetSelection() ) self.__on_select_state(None) fsmevents.signal_fsm_change(self)
def __get_fsm(self): return pynebula.lookup(fsm.get_fsm_of_state(self.state_path))