Yes, a module would be the way to go. You could go writing a generic Tk::History package, but if you want to deal just with entries, this is what a derived HistEntry package looks like, based on your post (and Tk::LabEntry): 

package Tk::HistEntry;

use vars qw($VERSION);
$VERSION = '0.001';

use base  qw(Tk::Frame);
use Tk::widgets qw(Frame Entry);

Construct Tk::Widget 'HistEntry';

sub Populate {
  require Tk::Entry;
  # HistEntry constructor.
  #
  my($cw, $args) = @_;
  $cw->SUPER::Populate($args);
  # Advertised subwidgets:  entry.
  my $e = $cw->Entry();
  $e->pack('-expand' => 1, '-fill' => 'both');
  $cw->Advertise('entry' => $e );
  $cw->ConfigSpecs(DEFAULT => [$e]);
  $cw->Delegates(DEFAULT => $e);
  $cw->AddScrollbars($e) if (exists $args->{-scrollbars});
  $e->{history} = {
    hlist => [],
    place => 0,
  };
  $e->bind("<Key-Return>"=> [ \&addHistory  ]);
  $e->bind("<Key-Up>"    => [ \&upHistory   ]);
  $e->bind("<Key-Down>"  => [ \&downHistory ]);
} 

sub addHistory {
  my $entry = shift;
  my $hist  = $entry->{history};
  push @{$hist->{hlist}}, $entry->get() ;
  $hist->{place}++;
} 

sub upHistory {
  my $entry = shift;
  my $hist  = $entry->{history};
  if ($hist->{place} <= 0) {
    $hist->{place} = $#{$hist->{hlist}}
  } 
  else {
    $hist->{place}--;
  } 
  $entry->delete('0','end');
  $entry->insert('1',$hist->{hlist}[$hist->{place}]);
} 

sub downHistory {
  my $entry = shift;
  my $hist  = $entry->{history};
  $entry->delete('0','end');
  if ($hist->{place} == $#{$hist->{hlist}}) {
    $hist->{place} = -1;
    return
  } 
  $hist->{place}++;
  $entry->insert('1',$hist->{hlist}[$hist->{place}]);
} 
1;

[download]

In your Code, you can now use HistEntry instead of Entry.

In reply to Re: What to do with my "Tk entry command-history" function by shmem
in thread What to do with my "Tk entry command-history" function by halfcountplus

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.