El 24/2/23 a les 11:10, Michael Van Canneyt via lazarus ha escrit:
No.
RecalcBufListSize does not necessarily fetch all the records. It fetches as
much records as needed: 10 by default, but classes such as TDBGrid may set
the number of needed records to the number of visible grid lines.
It can be that TBufDataset fetches all records on open, there is a
property that
controls this. But it can also fetch on an as-neede basis.
FEOF is simply initialized from the first batch. But it is maintained
based on the result of GetNextRecord. Check the MoveBy procedure.
Only when GetNextRecord returns false, is FEOF set to True (line 2005).
Thank you!
With these insights (and a lot of sweat, blood and tears ;-)) I managed
to write a descendant dataset that does what I want. Not 100% complete
yet but getting there.
Bye
--
Luca Olivetti
Wetron Automation Technology http://www.wetron.es/
Tel. +34 93 5883004 (Ext.3010) Fax +34 93 5883007
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