Hi I am working on Perl/Tk. I have a small query about Scrollbar's in Perl/Tk. In a small program i have a button, ROText box and a Scrollbar. I am trying to implement the autoscroll functionality i.e when i click on the button the message should display in the Textbox, and the new text that is displayed should be visible. The previous text should scroll up and the current text that is inserted in the text box should be visible automatically. But i am not getting it to work. I need to scroll down to see the new text. Here is the code that i am working with.

use Tk;
use strict;
require Tk::ROText;

my $rotext_box;
my $frame;
my $count=0;
        
    my $mw = MainWindow->new;
        $mw->title("Scrollbar_View");
    $mw->geometry("500x300"); 
    $mw->resizable(0,0);
        
    my $frame1 = $mw->Frame()->pack(-side => 'top');        
        
    my $send_cmd_btn = $frame1->Button(-text => 'Send_Cmd', 
                                    -state=>'normal',
                                    -command =>\&show)
                                    ->pack(-side=>'left', -padx=>5);
        
        $frame = $mw->Frame(-relief => 'groove', -background=>'white')
+                        ->pack(-side => 'top', -fill=>'x', -fill=>'y'
+);
       
    
     my $xscroll = $frame->Scrollbar(-orient => 'horizontal');
     my $yscroll = $frame->Scrollbar();
          
    $rotext_box = $frame->ROText(-background =>'white', -height => 25,
+ -width => 120,  
       -xscrollcommand => ['set' , $xscroll],
       -yscrollcommand => ['set', $yscroll]  );
                                 $xscroll->configure(-command => ['xvi
+ew', $rotext_box]);
     $yscroll->configure(-command => ['yview', $rotext_box]);
     $xscroll->pack(-side => 'bottom', -fill => 'x');
     $yscroll->pack(-side => 'right', -fill => 'y');

     $rotext_box->pack(-side => 'bottom', -fill => 'y');
  
MainLoop();
              
sub show 
{
    Tk::DoOneEvent(0);
    my $text_to_Insert = "This is a large text that is displayed in th
+e ROText for $count time\n\n\n"; 
    $rotext_box -> insert('end', $text_to_Insert);
    $rotext_box->update();
    $count++;
}
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