Hi

The following code leads to a strange behavior.

First pressing "Calculate" button prints the expected result: Uw=2.6.

Then if I press "Characteristics" button and close the Characteristics window, pressing again "Calculate" button leads to Uw=0 for the same values of independent variables! I tend to conclude that $window{xAf} is somehow considered as a character...

Could somebody please tell me what I am doing wrong?

use strict;
use warnings;
use Tk;

my $roomTl;
my %window = (xAf=>0.20);

my $mw = new MainWindow(
);
$mw->Button(
  -text         => "\n Characteristics \n",
  -command      => \&roomSub,
)->pack(-fill => "x");
$mw->Button(
  -text         => "\n Calculate \n",
  -background   => "red",
  -command      => \&designSub,
)->pack(-fill => "x");

MainLoop;

sub roomSub {
  if (! Exists ($roomTl)) {   
    $roomTl = $mw->Toplevel(
    );
    $roomTl->Entry(
      -textvariable => \$window{xAf},
    )->pack(-fill => 'x');
  }
  else {
    $roomTl->deiconify();
    $roomTl->raise();
  }  
}

sub designSub {
  my $Uf = 13;
  my $Uw = $window{xAf} * $Uf;
  print "Uf = $Uf \t xAf = $window{xAf} \t Uw = $Uw \n";
}

[download]

In reply to perl/Tk Problem with referenced variable in Entry by contact@solamen.fr

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