Hi, I want to validate the fields , i am trying like this but i don't know where iam going wrong please , any one can explain....it. 

#!/usr/bin/perl -w
use strict;
use Tk;

my $opt = "0";
my $opt1 = "0";

my $mw = MainWindow->new();
    $mw-> geometry("400x100");
    $mw -> configure(-background => "cyan",
                    -foreground => "lightblue"
);


my ($var, $var1);

 $opt = $mw->Optionmenu(
        -background => "lightgreen",
        -options => [[jan=>1], [feb=>2], [mar=>3], [apr=>4]],
        -variable => \$var,
        -command => \&sub_opt,
       )->pack;
$opt->addOptions([may=>5],[jun=>6],[jul=>7],[aug=>8]);
my $exit_but = $mw->Button(-text=>'Exit',
    -command=>sub{
         print "Var= $var  Var1= $var1\n";
         $mw->destroy},
    -state => 'disabled',
    )->pack(-side=>"bottom");

 $opt1 = $mw->Optionmenu(
        -background => "lightgreen",
        -options => [qw(test1 test2 test3)],
        -variable => \$var1,
        -state => 'disabled',
        -command =>\&sub_opt1,
  )->pack;
     
MainLoop;

sub sub_opt {
                if($var ne " ") {
                        $opt->configure(-state => 'disabled');
                        $opt1->configure(-state => 'normal');
                } else {
                        $opt -> configure(-state => 'disabled');
                        }
}

sub sub_opt1 {
                if ( $var1 ne " ") {
                $opt1->configure(-state => 'disabled');
                $exit_but->configure(-state =>'normal');
                } else {
                        $exit_but->configure(-state => 'disabled');
                }
}

[download]

In reply to optionmenu configure problem in perl tk by vr786

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.