#!/usr/local/bin/perl -w
use Tk;
{
 # This could/should go in Tk/LEntry.pm
 package Tk::LEntry;
 require Tk::Entry;
use base  qw(Tk::Derived Tk::Entry);
 Construct Tk::Widget 'LEntry';
 sub Populate
 {
  my ($w,$args) = @_;
  $w->ConfigSpecs(-maxwidth => ['PASSIVE','maxWidth','MaxWidth',12]);
 }
 sub insert
  {
   my ($w,@args) = @_;
   # Do the insert as Entry does it.
   $w->SUPER::insert(@args);
   # Now see if that is 'legal' ...
   my $max  = $w->cget('-maxwidth');
   if (length($w->get) > $max)
    {
     $w->delete($max,'end');
     $w->bell;
    }
  }
}
my $mw = MainWindow->new;
my $e  = $mw->LEntry(-maxwidth => 5, -width => 5);
$e->pack;
MainLoop;
__END__