To let the Popup do the work, try something like this:

#!/usr/bin/perl

use Tk;

my $mw = MainWindow->new;
my $txt = $mw->Text()->pack(-side => 'top');

my $number = 1;
my $letter = 'a';
my $popup_menu = "";

my $new_menu = $mw->Menu();

$new_menu->add('command', 
           -label => "Click me to show the pop-up menu.", 
           -command => sub { 
           $popup_menu = $mw->Menu();
           $popup_menu->add('command',
                    -label => "Number: $number",
                    -command => sub {
                    print STDERR "Number: $number\n";
                    $number++;
                    }
                    );
           $popup_menu->add('command',
                    -label => "Letter: $letter",
                    -command => sub {
                    print STDERR "Letter: $letter\n";
                    $letter++;
                    }
                    );
           $popup_menu->Popup(qw/-popover cursor/);
           }
           );

$txt->menu( $new_menu );

MainLoop;
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Hi
My problem is that, I have to find a solution with this Scrolled text area only. This custom "popup do the work" is wonderful but I have to fit it into my code which is using Scrolled widget. Changing the 'Scrolled' thing is not an option for me

The example I gave above works with a Scrolled Text widget as well. Just change the line

my $txt = $mw->Text()->pack(-side => 'top');
#to
my $txt = $mw->Scrolled('Text')->pack(-side => 'top');
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Another option is to bind mouse button 3 ( right click ) to the $mw to do your change. Supressing the Text menu is up to you.

#!/usr/bin/perl

use Tk;

my $mw = MainWindow->new;
my $txt = $mw->Scrolled('Text')->pack(-side => 'top');

$mw->bind('<Button-3>', sub { print "main control 3 \n" });


MainLoop;
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---

I'm not really a human, but I play one on earth.
Old Perl Programmer Haiku ................... flash japh

It should be possible to hook into the <<MenuSelect>> virtual event bound to the popup menu but I am having a hard time figuring out how to do so...

Another less elegant way is to just poll the state of the -wrap option and do your callback when it changes.

use warnings;
use strict;
use Tk;


my $mw = new MainWindow;
$mw->geometry("200x200");
my $frame = $mw->Frame()->pack;

my $textbox = $frame->Scrolled('Text',
    -scrollbars => 'soe',
    -foreground => 'blue',
    -background => 'white',
    -wrap => 'none',
  )->pack;
$textbox->insert('end', "This is scrolled widget.\nThis is scrolled wi
+dget.This is scrolled widget"); 

my $wrapmonitor = $textbox->cget('wrap');
$textbox->repeat(100, 
    sub { 
        if ( $textbox->cget('wrap') ne $wrapmonitor ){
            $wrapmonitor = $textbox->cget('wrap');
            mycallback($wrapmonitor) #whatever
        }
    }
);

MainLoop;

sub mycallback {
    print shift, "\n";
}
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