Add a new item in the log list.

        Item is added only if the criticity (event_state) is WARNING or CRITICAL.

def _create_event(self, event_state, event_type, event_value,
                      proc_list, proc_desc, peak_time):
        """Add a new item in the log list.

        Item is added only if the criticity (event_state) is WARNING or CRITICAL.
        """
        if event_state == "WARNING" or event_state == "CRITICAL":
            # Define the automatic process sort key
            self.set_process_sort(event_type)

            # Create the new log item
            # Time is stored in Epoch format
            # Epoch -> DMYHMS = datetime.fromtimestamp(epoch)
            item = [
                time.mktime(datetime.now().timetuple()),  # START DATE
                -1,  # END DATE
                event_state,  # STATE: WARNING|CRITICAL
                event_type,  # TYPE: CPU, LOAD, MEM...
                event_value,  # MAX
                event_value,  # AVG
                event_value,  # MIN
                event_value,  # SUM
                1,  # COUNT
                [],  # TOP 3 PROCESS LIST
                proc_desc,  # MONITORED PROCESSES DESC
                glances_processes.sort_key]  # TOP PROCESS SORTKEY

            # Add the item to the list
            self.events_list.insert(0, item)

            # Limit the list to 'events_max' items
            if self.len() > self.events_max:
                self.events_list.pop()

            return True
        else:
            return False