Below is the code to a pTk megapwidget I have been working on. It displays the way I want -- Here is the problem: If I hit <RET> everything goes away (desired result). If I press 'Abort' , the pTk frame and its content go away, but I am left with an mwm-frame with a blank grey background (unwanted). Am I asking pTk to do too much? Is there, then, a better way to do this? Since I seem to rewrite this block of code so much , I want to make as much of this into a reuseable megawidget as possible. Its also a reason for the $header_msg which is customiseable. 

#!/usr/bin/perl

use strict; # https://perlmonks.org/?node_id=11141523
use warnings;
use Tk;
use Tk::DialogBox;
use Tk::Frame;

{ ## OPEN package

package Tk::GUIask;

use List::Util qw(first);
use base qw/Tk::Frame  /;

Construct Tk::Widget 'GUIask'; ## INSTALL MyNewWidget in pTk namespace

sub ClassInit  ## Called once to intitalise new class
  {
  my ($class , $mw ) = @_;
  $class ->SUPER::ClassInit($mw);
  }

sub Populate
  {
  my ($self , $args   ) = @_;
  my $tv = delete $args->{-textvariable}; # NOTE
  $self ->SUPER::Populate($args) ;

  require Tk::Entry;

# $self -> SUPER::Populate($args); ## NEEDED?

  my $search = "";

  my $frame = $self -> Frame(
                             -borderwidth => 5,
                             -relief      => 'ridge',
                            ) -> pack();

  my $label = $frame -> Label (
                               -fg => 'blue',
                               -font => 30
                              ) -> pack(-fill => 'x'  );

  my $entry = $frame -> Entry(
                              -textvariable => $tv, # NOTE
                             ) -> pack(-fill => 'x');

  my $button = $frame -> Button (
                                  -background => 'Red',
                                  -text => "Abort",
                                  -command => sub { ($frame -> destroy
+() ) if Tk::Exists($frame); }
                                ) -> pack ( -side => 'top', -fill => '
+x',);

  $self -> Advertise ('entry' => $frame );
  $self -> ConfigSpecs (
                         DEFAULT => [$frame],
                         text => [$label]     ## IF ID DONT have the s
+tring 'text => [$label]'
                       );                     ## then it will choke on
+ '-text => $header_msg'
## WHY?

  $self -> Delegates ( DEFAULT => $frame,
                       bind => $entry, # NOTE
                     );

  } ## CLOSE Populate

1;

} ## CLOSE package

##       Invoke the MEGAWIDGET down here to test       ##

my $mw = MainWindow -> new;
$mw -> geometry('300x300+900+250');
$mw -> title('Main Window ');

my $header_msg ="FOOOOO";
my $input = '';

my $dialog = $mw ->DialogBox( -title => ' ', -buttons => []);

my $entry = $dialog -> GUIask( -textvariable => \$input,
                               -label => $header_msg
                             )-> pack();

$entry -> bind( '<KeyPress-Return>' , sub  # NOTE
                               {
                                 print "input = $input\n";
                                 $dialog -> destroy();
                               }
              );

$dialog->Show; # NOTE

MainLoop;

[download]

In reply to Is this megawidget doable by Anonymous Monk

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.