Creates a new DataPilot field which contains a group containing the
given DataPilot field items (members).
It is possible to create multiple groups by calling this method
several times at the same DataPilot field. On subsequent calls, the
DataPilot field created at the first call is used to insert the new
groups.
Groups the members of this field by dates, according to the passed
settings.
If this field is already grouped by dates, a new DataPilot field
will be created and returned. If this field is not grouped at all, the
date grouping is perfomed inside of this field (no new field will be
created). There must not be any other grouping (by member names or by
numeric ranges), otherwise an exception is thrown.
Parameter aInfo
contains the information how to group the items of the field. The
members of this struct have to fulfill the following requirements:
The member DataPilotFieldGroupInfo::Step must
be zero, unless ranges of days have to be grouped (see the
description of the member GroupBy below), in that case the value
must be greater than or equal to 1 and less than or equal to 32767.
The fractional part of the value will be ignored.
The member DataPilotFieldGroupInfo::GroupBy
must contain exactly one of the flags from DataPilotFieldGroupBy.
A combination of several flags will not be accepted. If
DataPilotFieldGroupBy::DAYS is specified, the
value of the member DataPilotFieldGroupInfo::Step
will specify the type of day grouping (see above). If that value
is zero, grouping is performed on all days of the year (e.g. the
members containing the 1st of January of any year are grouped
together). If that value is greater than zero, grouping is done on
ranges of days, and the value specifies the number of days grouped
into one range (e.g. a value of 7 groups the members of a week
into a range).
the new created field if there is one created. NULL is returned,
if date grouping is performed inside this field (i.e. this field
was not grouped by dates before).
Throws
com::sun::star::lang::IllegalArgumentException
if the passed struct does not contain valid settings as described,
or if this field is already grouped by member names or numeric
ranges.
