rem: EventItem(const QString& url, int seqno, const QValueList<QDateTime>& alarmtimes) : calendarURL(url), eventSequence(seqno), alarmTimes(alarmtimes) {}
add: EventItem() : eventSequence(0) { }
context: 			EventItem(const QString& url, int seqno, const QValueList<QDateTime>& alarmtimes)			        : calendarURL(url), eventSequence(seqno), alarmTimes(alarmtimes) {}