in reply to Building an adaptable 'Entry Widget'

#!/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 => [$label]     ## IF ID DONT have the string 'text => [$labe
+l]'
    );                    ## then it will choke on '-text => $header_m
+sg'
## 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( '<Return>' , sub  # NOTE
    {
    print "input = $input\n";
    $dialog -> destroy();
    }
  );

$dialog->Show; # NOTE

MainLoop;

[download]

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Re^2: Building an adaptable 'Entry Widget'
by Anonymous Monk on Feb 21, 2022 at 15:14 UTC

    THANKS! That was awfully close to my desired goal.

    Inside of: 

      sub Populate
    {
      ...
    }

    [download]
    You have: 
      my $entry = $frame -> Entry(
                               -textvariable => $tv, # NOTE
                             ) -> pack(-fill => 'x');

    [download]
    Why isnt it ' -textvariable => \$tv, ' ?

    When I call widgets inside of DialogBox I do: 

      GUIask (
           -textvariable => \$input,
         )

    [download]
    Why the disconnect/inconsistancy ? I totally dont get this difference.

    #######################################

    Inside of 

      sub Populate
              {

              }

    [download]
    you have: 
      my $label = $frame -> Label (
                                -fg => 'blue',
                                -font => 30
                              ) -> pack(-fill => 'x'  );

    [download]
    Shouldnt the label be inside the frame (and colored blue) ? Because I am not seeing that; this is something I want.

    If I click on the main window, and move it, my widget gets covered up.

    SEE: Writing my first PERL/Tk megawidgit

    This mega-widget does not do that. Why? (Also another Q by me). This mega-widget stuff is new to me.

    It would be nice to have some comments, to make this code more understandable like the 

      Entry(
         -textvariable => $tv, 
       ) -> pack(-fill => 'x');

    [download]

    block above. (why its not \$tv )

    2022-02-23 Athanasius added code and paragraph tags.

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      Where did my structure go?! Is there a way to delete and reformat this?

[reply]
        Only logged-in users can edit their posts. You should have used the <code> tags (mentioned both above and below the edit area).

        map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]
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        you should also check the preview before creating a post.

        Cheers Rolf
        (addicted to the Perl Programming Language :)
        Wikisyntax for the Monastery

[reply]

      It was just a bunch of small code snippets and Qs.

      ANYHOOOOOO, I solved 1 Q, and that brought up another Q:

      When I call GUIask mega-widget, and use ' -label => $header_msg' the $header_msg gets printed outside the Frame(); when I use '-text => $header_msg' then the $header_msg gets printed inside the Frame().

      Why the difference here? The second case ('-text => $header_msg') is what I wanted.

      OH! BTW: I tried to get an acct here. I didnt get an email. I will check Trash, but dont count on it; I have already thrown much stuff out today...

      2022-02-23 Athanasius added code and paragraph tags.

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