barcode scanner

Frank D. Engel, Jr. fde101 at fjrhome.net
Mon Nov 29 11:02:45 EST 2004


In that case it would likely depend on the scanner and on the interface 
between the scanner and the computer.  In some cases this might not be 
possible to distinguish, in others it may depend on the configuration 
of the scanner, and in others it might require an external for Rev.

Since the barcodes rarely use letters other than a possible 'X' (ISBN 
#s), one workaround might be to create a 'simulated' numeric keypad on 
the letter keys, then trap these and handle them specially for your 
purposes (with a keyDown handler); for example:

Y=7   U=8   I=9
H=4   J=5  K=6
N=1   M=2  ,=1
<space>=0

Not a very elegant solution, but it could be made to work, and would 
rarely if ever interfere with a barcode scanner.

On Nov 29, 2004, at 10:50 AM, Michael D Mays wrote:

> In many cases this is true. But think about the case where you are 
> scanning identical items. It would nice to be able to type 10 and then 
> scan the item instead of scanning each identical item. Suppose you 
> want to route the item somewhere. You need to be able to enter the 
> routing information. How about using a scanner to log in? You would 
> probably want to type a password.
>
> If you just want to scan an item and then go to the next item and scan 
> it, then not being able to tell where the input is from is fine. But 
> in all the other cases you probably just want the scanned information 
> going to a specific field (container) and it would be nice not to have 
> to force the focus to that field with an addition mouseclick or tab(s) 
> etc.
>
> Michael
>
>
> On Nov 27, 2004, at 10:48 AM, Frank D. Engel, Jr. wrote:
>
>> This is not normally a problem.  One would typically want the ability 
>> to key in the same data being scanned in the instance that the 
>> scanner fails to read the barcode (as sometimes can happen with an 
>> inaccessible or poorly conditioned barcode), so this overlap would 
>> actually make life easier.
>
> _______________________________________________
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> use-revolution at lists.runrev.com
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>
>
-----------------------------------------------------------
Frank D. Engel, Jr.  <fde101 at fjrhome.net>

$ ln -s /usr/share/kjvbible /usr/manual
$ true | cat /usr/manual | grep "John 3:16"
John 3:16 For God so loved the world, that he gave his only begotten 
Son, that whosoever believeth in him should not perish, but have 
everlasting life.
$



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