// Comparer for sorting list
public int CompareTo(CListableYear other)
{
if (fDate == null)
{
return(-1);
}
if (other.fDate == null)
{
return(1);
}
return(fDate.CompareTo(other.fDate));
}
// Used when sorting events into chronological order. If no dates are explicitly attached to the event, tries to work out an order.
public int CompareTo(Event other)
{
if (fDate != null && other.fDate != null)
{
int res = fDate.CompareTo(other.fDate);
if (res != 0)
{
return(res);
}
// Some events naturally precede others: BIRTH, MARRIAGE, DEATH, BURIAL
int precedence = Precedence - other.Precedence;
if (precedence != 0)
{
return(precedence);
}
// Sort alphabetically if all else fails.
return(fDescription.CompareTo(other.fDescription));
}
else if (other.fDate != null)
{
// This goes after valid dates.
return(1);
}
else if (fDate != null)
{
// This goes before invalid dates.
return(-1);
}
// Some events naturally precede others: BIRTH, MARRIAGE, DEATH, BURIAL
int precedence2 = Precedence - other.Precedence;
if (precedence2 != 0)
{
return(precedence2);
}
// Sort alphabetically if all else fails
return(fDescription.CompareTo(other.fDescription));
}
