#!/usr/bin/perl
use warnings;
use strict;
use Tk;
use Tk::FileSelect;
use Encode;
use utf8;

my $mw = MainWindow->new;

$mw->configure( -background => 'black', -foreground => 'white' );
$mw->geometry( "400x100" );
$mw->title( "Multiple Windows Test" );

my $button1 = $mw->Button(
   -text       => "view Results",
   -background => "cyan",
   -command    => \&button1_sub
)->pack( -side => "right" );

$mw->Button( -text => "Exit", -command => sub { exit } )
 ->pack( -side => "bottom" );

MainLoop; 


sub button1_sub {
   my $subwin1 = $mw->Toplevel;
   $subwin1->geometry( "500x400" );
   $subwin1->title( "Sub Window #1" );
 
   my $fh;
   open( $fh, '<', "./test1.txt" ) or die $!;
   my @contents = <$fh>;
   print "@contents\n";
   close( $fh );

  my $sublable = $subwin1->Scrolled( 'Text', -scrollbars => 'osoe', )->pack;
  $sublable->insert( 'end', "@contents" );

 my $subwin_button = $subwin1->Button(
      -text    => "Close window",
      -command => sub {$subwin1 => 'destroy'}
    )->pack( -side => "bottom" ); 
}