Using script in a number field to default the field to zero

[mikemc]

Part A I have a button on a card that manipulates numbers input by a user in four fields . When the button is engaged
I would like the script in the number field to check if the the field is blank if it is I would like
to enter a zero in that field. Part B. Does this kind of code go into the script for the field? If
it does not go in the number field script what kind of stuff does and can you run it from a button.

[SparkOut]

You can make a check in the field script when a user edits or leaves the field (see "closeField" and "exitField"). But you will have to verify in the button script as well, in case nobody made an entry at all (or at least set a default value on openCard for instance).
So check in the button script,

Code: Select all

put field "numberfield" into tNum
if tNum is empty then --also maybe check "is not a number" or other validation
  put 0 into tNum
  put 0 into field "numberfield"
end if
--do stuff with tNum

[Klaus]

Hi Mike,

A & B:
you can use a "closefield" handler in the field script:

Code: Select all

on closefield
   if me = EMPTY then
     put 0 into me
   end if
end closefield

Best

Klaus

[mikemc]

Thanks both pieces of code work good with one small change using "" instead of the word empty. I don"t know why
but this seems to work better on repeated tries

[mikemc]

Not sure but I guess "" and empty are the same thing. Anyway the problem i'm having now is if you
put a couple of blank spaces in the field the code will not change the field to 0 but instead leaves it blank
any ideas?

[SparkOut]

As I mentioned, also check if the contents "is a number" or not.
You could also check if it "is an integer" or not.