def states_update_before(self, model, prop_name, info):
overview = NotificationOverview(info)
if not overview.caused_modification():
return
if overview.get_affected_property() == 'state' and \
overview.get_cause() in ["change_state_type"]:
changed_model = self._selected_sm_model.get_state_model_by_path(
overview.get_method_args()[1].get_path())
self.observe_model(changed_model)
def check_info_on_no_update_flags(self, info):
"""Stop updates while multi-actions"""
# TODO that could need a second clean up
# avoid updates because of state destruction
if 'before' in info and info['method_name'] == "remove_state":
if info.instance is self.model.state:
self.no_update_state_destruction = True
else:
# if the state it self is removed lock the widget to never run updates and relieve all models
removed_state_id = info.args[1] if len(
info.args) > 1 else info.kwargs['state_id']
if removed_state_id == self.model.state.state_id or \
not self.model.state.is_root_state and removed_state_id == self.model.parent.state.state_id:
self.no_update_self_or_parent_state_destruction = True
self.relieve_all_models()
elif 'after' in info and info['method_name'] == "remove_state":
if info.instance.state_id == self.model.state.state_id:
self.no_update_state_destruction = False
# reduce NotificationOverview generations by the fact that after could cause False and before could cause True
if not self.no_update_state_destruction and not self.no_update_self_or_parent_state_destruction and \
(not self.no_update and 'before' in info or 'after' in info and self.no_update):
return
overview = NotificationOverview(info)
# The method causing the change raised an exception, thus nothing was changed and updates are allowed
if 'after' in info and isinstance(overview.get_result(), Exception):
self.no_update = False
self.no_update_state_destruction = False
# self.no_update_self_or_parent_state_destruction = False
return
if overview.get_cause() in [
'group_states', 'ungroup_state', "change_state_type",
"change_root_state_type"
]:
instance_is_self = self.model.state is overview.get_affected_core_element(
)
instance_is_parent = self.model.parent and self.model.parent.state is overview.get_affected_core_element(
)
instance_is_parent_parent = self.model.parent and self.model.parent.parent and self.model.parent.parent.state is overview.get_affected_core_element(
)
# print("no update flag: ", True if 'before' in info and (instance_is_self or instance_is_parent or instance_is_parent_parent) else False)
if instance_is_self or instance_is_parent or instance_is_parent_parent:
self.no_update = True if 'before' in info else False
if overview.get_affected_property() == 'state' and overview.get_cause() in ["change_state_type"] and \
self.model.get_state_machine_m() is not None:
changed_model = self.model.get_state_machine_m(
).get_state_model_by_path(
overview.get_method_args()[1].get_path())
if changed_model not in self._model_observed:
self.observe_model(changed_model)