[REBOL] Re: Spreadsheet
From: agem:crosswinds at: 4-Mar-2001 7:41
>>>>>>>>>>>>>>>>>> Ursprüngliche Nachricht <<<<<<<<<<<<<<<<<<
Am 04.03.01, 01:24:20, schrieb "Brett Handley" <[brett--codeconscious--com]>
zum Thema [REBOL] Re: Spreadsheet:
> The thought occurred to me. I actually did come across a situation
where we
> wanted to provide spreadsheet functionality but in a very constrained
> manner. The reason being that the users were already using
spreadsheets and
> were very nervous about causing errors. So they wanted a custom
program
> instead, but they needed flexibility in how to define a calculation.
> We never did that app, because we were going to get a "better bang for
buck"
> by doing other things first.
> Anyways my thoughts about doing this with Rebol:
> 1) Need to build a grid based entry interface style. Once done, very
useful
> for other Rebol applications.
> 2) Need to code a graph sorting algorithm that gets as input the
> dependencies between cell calculations.
How much calculatios would be needed?
Is a left-right/up-bottom complete calculation really to slow?
Because you can enter simply rebol-code in cells,
and then dependency-chcking is hard..
> 3) Need to provide all the little user-interface niceties that people
expect
as a seldom spreadsheet-user, what do they expect?
Copy/paste of areas/formulas?
Or would a rebol-loop accessing cells are enough?
> from spreadsheet applications.
> 4) Aim to keep as much power of Rebol as possible accessible to user
entered
> parts of the spreadsheet.
> I think (1) is the most reusable for other applications. (2) is an
> interesting problem to solve.
> (3) may actually be the most amount of work in the project - users
expect a
> lot!
> but (4) is a good justification for a Rebol powered spreadsheet -
Rebol
> programming can be made visual...
> Brett.
Volker
