gui problem with tableview selection

[Andreas Höschler]

Hi all,

suppose you have a tableview presenting a few objects, one per row and 
under the tableview a few textfields also presenting properties of the 
selected object in the tableview. One of the textfields below the 
tableview has a date formater.

I enter an invalid string into this field - e.g. 1.1. - and then click 
on a(nother) row in the tableview to change selection and thus the 
select object.

The correct behavior (MacOSX) would be that this is not allowed. The 
machine should just beep and thus tell the user that he can't change 
the selection or do anything else on the form until he has entered a 
valid dateString into the textfield (or @"").

Under GNUstep this state is ignored. I can't leave the field editor by 
clicking into another textfield (correct) but I can change the 
selection of the tableview by clicking on any row (incorrect).

Any idea what we can do about that?

Thanks,

  Andreas