Hi all,

>>>> Date: Wed, 28 Feb 2024 15:29:11 +0100
>>>> From: Eric Marsden <eric.marsden@risk-engineering.org>
>>>> 
>>>> Hello,
>>>> 
>>>> The following generates an error. It seems to me that it would be 
>>>> preferable to insert the header line and show zero rows for the vtable.
>>>> 
>>>>     (require 'vtable)
>>>>     (make-vtable :columns '("tweedle" "dum") :objects (list))
>>>> 
>>>> Debugger entered--Lisp error: (wrong-number-of-arguments #<subr max> 0)
>>>>    max()
>>>>    apply(max nil)
>>>>    seq-max(nil)

I did some work on fixing this, and would like to suggest the attached patches.
There are three, which I could also squash into a single patch if preferred, but
although related, they are conceptually separate, I think. They are:

0001-Allow-empty-vtable.patch

This fixes the problem that if `make-vtable` is called without any objects and
the widths of (some of) the columns aren't specified, `vtable--compute-widths`
would error out. With the patch, columns without an explicit width get assigned
equal parts of the remaining window width.


0002-Fix-recomputing-of-vtable-column-alignment.patch

This one fixes what I believe to be another bug: `vtable--compute-columns`
should be able to recompute the columns, including setting the alignment
property. It didn't actually do the latter, though.


0003-Enable-inserting-new-objects-into-empty-vtable.patch

This patch makes it possible to insert an object into an empty vtable. It does
this by simply recreating and redisplaying the table, which I think makes the
most sense.

Comments?

TIA

-- 
Joost Kremers
Life has its moments