Dear monks,

I have a simple gui. Two buttons: "start" counting and "end" counting. Clicking on "start" , the script starts counting and prints out. I would like to be able to press anytime the button "stop" and stop the counting. While counting the Window is frozen.

#!/usr/bin/perl -w
use strict;
use warnings;
use Tk;

my $mw = MainWindow->new();

$mw->Button(
    -text    => 'Start',
    -command => \&start_process
)->pack;

$mw->Button(
    -text    => 'Stop',
    -command => \&stop_process
)->pack;

MainLoop;

sub start_process{
my $count = 0;
  while ($count < 10) {
    print $count;
    sleep 1;
    $count ++;
  }
}

sub stop_process{
#stopping the process
}
[download]

Even putting a $mw->update(); in the while loop (as suggested in other posts) doesn't change the behaviour. What is the best practice to keep the Window "alive" even while counting?

Thanks, cla

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