This is my code:

#!/usr/bin/perl
use warnings;
use Tk;
use Tk::widgets;

my $main = new MainWindow;
$main->title('Tk_Test.pl');

$frame = $main->Frame();
$menubar = $main->Frame(-borderwidth=>2);
$text = $frame->Text(-wrap=>"word", -height=>10, -font=>'Arial');
$filebutton = $menubar->Menubutton(-text=>"File");
$filemenu = $filebutton->Menu(-tearoff=>0);

$filebutton->configure(-menu=>$filemenu);
$filemenu->command(-command => \&print_frame, -label => "Print frame")
+;
$filemenu->command(-command => \&get_file, -label => "Get file");
$filemenu->command(-command => \&dir_dialog, -label => "Get dir");

# position the widgets
$filebutton->pack(-side => 'left');
$menubar->pack(-side => 'top', -fill => 'x');
$frame->pack(-side => 'top', -fill => 'both');
$text->pack(-side => 'right', -fill => 'both');

$text->insert('1.0', "Write something here... Then click File/Print fr
+ame\n");

MainLoop;

sub print_frame {
    print $text->get("1.0", "end");  # prints frame text to STDOUT
}

sub get_file {
  $input_file = $main->getOpenFile();
  $text->insert('1.0', "You opened $input_file\n");
  print "You opened $input_file\n" if $input_file;
}

sub dir_dialog {
    my $w = shift;
    my $ent = shift;
    my $dir;
    $dir = $w->chooseDirectory;
    if (defined $dir and $dir ne '') {
    $ent->delete(0, 'end');
    $ent->insert(0, $dir);
    $ent->xview('end');
    }
}
[download]

My problem is with sub dir_dialog. I got it from the widgets demo Common dialogs, Directory selection dialog. In the demo it works perfectly but I don't know how to connect it to my script. I'll appreciate some enlightenment.