Dear monks

I need a user to select from multiple dropdown menus always different values. In the example below I have 2 dropdoen menus (Tk::JComboBox) with language abbreviations. If the user picks "en" in the first dropdown, the same value should be not clickable in the second one (or the other way round)? Any Idea? 

#!/usr/bin/perl
use warnings;
use strict;
use Tk;
use Tk::JComboBox;

my $mw = MainWindow->new;
my $lang1;
my $lang2;
    
    my $drop1 = $mw->JComboBox(
    -textvariable => \$lang1,
    -choices => [qw(en fr de it sp)],
    -entrybackground => 'white',
    -background=> 'white',
    -disabledbackground=>'grey',
    -autofind => { -enable  => 1 },
    )->pack();
    
    my $drop2 = $mw->JComboBox(
    -textvariable => \$lang2,
    -choices => [qw(en fr de it sp)],
    -entrybackground => 'white',
    -background=> 'white',
    -disabledbackground=>'grey',
    -autofind => { -enable  => 1 },
    )->pack();
    
 MainLoop;

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In reply to Multiple Tk::JComboBox with unique values selectable by welleozean

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