I've managed to write a working widget with a Listbox. But I cannot find a way to Scroll the Listbox within the widget. (Search for 'Scrolled') See these two pieces of code and lines.

Scenario

perl testPicker.pl
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HELP!!!

testPicker.pl

#!/usr/bin/perl -w

use Tk;
use Picker;
use strict;

my $mw= MainWindow->new;

my $ep= $mw->Picker(-title=> 'Entity Picker');

# should return an entity key
my $choice= $ep->Show;
print "$choice\n";

$mw->destroy;

MainLoop;
[download]

Picker.pm is

$Tk::Picker::VERSION= '1.0';

package Tk::Picker;

use Tk::Listbox;

use base        qw/Tk::Derived Tk::DialogBox/;
use subs        qw/build/;

use strict;

Construct Tk::Widget 'Picker';

# Class global variables

sub build($);

# Class initializer.
sub ClassInit($$) {
  my ($class, $mw)= @_;

  $class->SUPER::ClassInit($mw);
  return 1;
}

our @fields= ( qw/
AUSTIN AUTUN AVA AVERY AYDEN 
BAILEY BENJAMIN BENNY BIANCA BILLIE 
BILLY BLAKE BRADEN BRADLEY BRADY 
BRANDON BRAYDEN BREANNA BRENDAN BRIAN 
BRIANA BRIANNA BRITTANY BRODY BROOKE 
BROOKLYN BRYAN BRYCE BRYSON CADEN 
CAITLIN CAITLYN CALEB CAMERON CAILA 
CARLOS CAROL CAROLINE CARSON CARTER 
CASSANDRA CASSIDY CATHERINE CESAR CHARLES 
CHARLOTTE CHASE CHELSEA CHEYENNE CHLOE 
CHRISTIAN CHRISTINA CHRISTOPHER CLAIRE CODY 
COLBY COLE COLIN COLLIN COLTON 
CONNER CONNOR COOPER COURTNEY CRISTIAN 
CRYSTAL DAISY DAKOTA DALTON DAMIAN
DANIEL DANIELA DANIELLE DAVID DELANEY 
DEREK DESTINY DEVIN DEVON /
);

sub Populate($$) {
  my ($self, $args)= @_;

  $args->{'-buttons'} = ['Cancel', 'Select' ]
    unless defined $args->{'-buttons'};
  $self->SUPER::Populate($args);

  $self->build;
}

# subroutines

sub build($);

sub buttonPress($$)
{
  my ($self, $param)= @_;
  print "$param\n";
  push @fields, "Name" . $#fields;
  $self->build;
}

sub build($)
{
  my ($self)= @_;

  $self->title("My Picker");
  $self->Component('Label', 'label1',
              -text=>"Select a name",
              -background=>"lightblue")->pack;

  # how to make a scrolled Listbox???
  #   does not compile...
  #   So - shouldn't Component accept a nested Component somehow??
#  my $sbox= $self->Component('Scrolled', 'scroll',
#                $self->Component('Listbox', 'sbox',
#                  -selectmode=>'single',
#                  -font=>'ansifixed',
#                  -width=>20,
#                  -height=>15,
#                 ),
#              -scrollbars=>'osoe'
#              )->pack;
  # an unscrolled Listbox
  my $lbox= $self->Component('Listbox', 'lbox',
                -selectmode=>'single',
                -font=>'ansifixed',
                -width=>20,
                -height=>15,
               )->pack;
  $lbox->insert('end', @fields);
  $self->{lbox}= $lbox;
}

sub Show($)
{
  my ($self)= @_;
  $self->Popup;
  $self->waitVariable(\$self->{'selected_button'});
  return 'Cancel' if ($self->{'selected_button'} eq 'Cancel');
  my $cvalue= $self->{lbox}->curselection;
  return 'No selection' if ($#$cvalue < 0);
  return $fields[$cvalue->[0]];
}

1;
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