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From: kofoid@bioscience.utah.edu (Dr. Cancer)
Newsgroups: comp.sys.mac.hypercard
Subject: Re: Scripting Question
Message-ID: <1991Feb22.225440.22356@fcom.cc.utah.edu>
Date: 22 Feb 91 22:54:40 GMT
References: <13258@hubcap.clemson.edu>
Sender: news@fcom.cc.utah.edu
Organization: Dept. of Biology,  University of Utah
Lines: 37

In article <13258@hubcap.clemson.edu> jcocon@hubcap.clemson.edu (james c 
oconnor) writes:
> I want a button to disappear when a field is empty and appear the
> instant a user types a character into it.  My code looks like this:
> 
> on keyDown theParm
>   send "keyDown" && theParm to this card
>   if me is empty then
>     hide card button "button"
>   else
>     show card button "button"
>   end if
> end keyDown
> 
> It works fine, except when the user types a space.  Then the message
> gets confused.  What gets passed is probably "keyDown  " and the second
> space isn't interpreted as the key.  Is there a good way around this?
> I'd like to avoid any hacks.
> 
> Jim

This script (placed in the field itself) works fine:

on keyDown theItem
  type theItem
  if me <> empty then
    show btn "test"
    select after text of me
  else
    hide btn "test"
    select after text of me
  end if
end keyDown

Cheers,

Eric.