Key Release binding

From: Shamil D. (shamild_at_hotmail.com)
Date: 04/01/04 

Date: 1 Apr 2004 08:35:46 -0800

I have an application in which the user enters customer ID and then
that customer's name and other information is automatically displayed
in adjacent entries. I want the user to be able to enter two customer
IDs in one screen. However, I'm finding some awkward behavior when
using a "KeyRelease" binding inside a loop. The "set var $ent($j)"
command fails because for some reason j is incremented to 3. Any idea
why it's doing that?

Below is a simplified code that reproduces the error.

Shamil D.

#-------------- begining of code --------------

for {set j 1} {$j <= 2} {incr j} { ;# open brace 1
entry .e$j -textvariable ent($j)
entry .r$j -textvariable res($j)
entry .n$j -textvariable nop($j)

pack .e$j .r$j .n$j

bind .e$j <KeyRelease> {
     set var $ent($j)
     if {[string length $var] == 3} {
        if {[info exists who($var)]} {
            set res($j) $who($ent($j))
            set nop($j) $age($ent($j))
            }
     } else {
            set res($j) {}
            set nop($j) {}
            }
  }

} ;# close brace 1

set who(100) Joe; set who(200) Sam; set who(300) Kevin;
set age(100) 26; set age(200) 33; set age(300) 15

#---------------- end of code ----------------

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