VBFlexGrid Control (Replacement of the MSFlexGrid control)

[Schmidt]

I'm working currently with the FlexDataSource functionality where a custom data source can be set via IVBFlexDataSource interface.

As previously discussed in page 1 it's only for display of the viewport. (like virtual mode)
Therefore the Find and Sort functionality must be turned off as this is managed by the custom data source.

However, what about other functionalities like .Clip, .FormatString, .AddItem, .Clear, .TextMatrix ?

There would be a little overhead as it needs to be evaluated whether to call IVBFlexDataSource::GetData or read internal TCELL.
Or also disable .Clip, .FormatString etc. when custom data source is set ?

Anyhow, .TextMatrix needs to be kept as setting .TextMatrix could then invoke IVBFlexDataSource::SetData. If not there where else ?

Maybe Schmidt (Olaf) can advise how this works exactly in the vsFlexGrid.

Can't say much with regards to .TextMatrix-Delegations (in both, read- and -write-directions),
because the whole point of an external DataSource is, to "not bother with storing data inside the Grid via TextMatrix".

And yes, sorting is done on the external Container (usually an Rs) - the only thing from the Grid we used
to trigger that, was "a Header-Click-Event".
And the "write-direction" of the external DS (::SetData) was triggered by "InCell-Edits" (not .TextMatrix)
(which the "big FlexGrid" allows).
Formatting was done via FlexGrid-Methods though (but not much - alternating Row-Colors mostly, along with ColWidth-settings).

We had only one case, where we needed "extensive Formatting" - and for that case we enabled
*also* the OwnerDraw-Mode on the Flex (in addition with using the external DS).

Olaf