Quick Code Question

[isabellspivey]

Hello,
How can I stop the application from proceeding until a field contains a minimum number of characters? I’m at the end of a kiosk workflow where patients swipe their cards, and I need the script to remain idle until the required data has been entered.

[Emily-Elizabeth]

Code: Select all

on KeyUp
   CharCheck
   pass KeyUp
end KeyUp

on DeleteKey
   CharCheck
   pass DeleteKey
end DeleteKey

on BackspaceKey
   CharCheck
   pass BackspaceKey
end BackspaceKey

private command CharCheck
   set the enabled of button "OK" to (the number of characters of me >= 3)
end CharCheck

[charleshallock]

Hello, don’t try to “pause” LiveCode—it will freeze the UI. Instead, validate and only proceed when the field is long enough.

Simplest approach:

Code: Select all

on returnInField
   if the number of chars of me < 6 then
      answer "Enter at least 6 characters."
      exit returnInField
   end if
   go to card "NextScreen"
end returnInField

Or validate while typing:

Code: Select all

on keyUp
   if the number of chars of me >= 6 then
      go to card "NextScreen"
   end if
end keyUp

Don’t block execution—control when you advance.

[dunbarx]

Many ways to do this, as you have already seen. I like, in the script of the offending field:

Code: Select all

on textchanged
   if the length of me >= 6 then doYourThing
end textchanged

Craig