Re: INDIRECT and real-time question

[Jody Goldberg <jody gnome org>]

On Wed, Oct 09, 2002 at 04:39:37PM -0400, Pavel Shevchenko wrote:
> In our company we are going to use gnumeric instead of Applix, so
lovely.

> I am going to implement proper INDIRECT() function and real-time interface.
Hold off for a day.  I finally have a decent idea for how to manage
thedynamic dependencies and was goingto tryitout tonight.
 
> I was able to create some real-time interface based on sample datasource 
> example plugin, but it has one problem: there is no way to stop updating spreadsheet
> when user remove real-time function call.
The sample data source should handle this correctly. When the
function call is removed the original expression is unlinked, and
the handler is called.

> The same problem exists with the 
> dependency problem for INDIRECT() function.
This is actually a bit more complicated because the dependencies are
internal.  I'm going to try adding a dep flag an catching it ateval
time.  Similar to the iteration support,

> So, now I am going to implement some way to register/unregister 
> callbacks for the cell changes, which will be called just after user
> finish editing cell, but before formula parsing. 
interesting, but probably not ideal.

I'll send a note to the list tommorow with a stutus update.  Your
timeing is excellent.  This is the oldest open bug we have.