Always try to show a real working example. If we can't run it, we only can guess by looking at code fragments, and that is difficult. This works and inserts, and scrolling works. 
#!/usr/bin/perl
use Tk;
use Tk::MListbox;
use strict;
use warnings;

my $mw = new MainWindow();

$mw->fontCreate('big', -family=>'arial',
   -weight=>'bold', -size=> 18 );
  
$mw->fontCreate('medium', -family=>'arial',
   -weight=>'bold', -size=> 14 );
     
   
my $frame = $mw->Frame(-bd => 2, -relief => 'raised')->pack(-expand =>
+ 1, -fill => 'both');

my $scrolledMListbox = $frame->Scrolled(
        qw/MListbox -selectmode browse -scrollbars oe -font medium /
        )->pack(-expand => 1, -fill => 'both');

$scrolledMListbox->columnInsert('end',  -text => "Header",-font => 'bi
+g');


$scrolledMListbox->bindRows('<ButtonRelease-1>',  
    sub {
        my ($w, $infoHR) = @_;
        print "@_\n";
        print "You selected row: " . $infoHR->{-row} .
             " in column: " . $infoHR->{-column} . "\n";
    
    print $scrolledMListbox->getRow( $scrolledMListbox->curselection()
+->[0] ),"\n";
    
    }
);

my $timer = $mw->repeat(1000,sub{
  $scrolledMListbox->insert('end', [int rand 20]  );
});

MainLoop;

[download]
I'm not really a human, but I play one on earth CandyGram for Mongo

In reply to Re: scrolling MListbox in Perl/tk by zentara
in thread scrolling MListbox in Perl/tk by vortmax

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.