I used  sub {$mw->destroy})->pack();

#!perl -slw

use strict;
use threads;
use threads::shared;
use Thread::Queue;

## A shared var to communicate progess between work thread and TK
my $Q = new Thread::Queue;
my $pid:shared;

sub work{
    $pid = open PROC, 
    'perl -le"$|=1; print and select(undef,undef,undef,0.1) for 1 .. 1
+000" |'
        or die $!;
    while( <PROC> ) {
        $Q->enqueue( $_ );
    }
    close PROC;
}

threads->new( \&work )->detach;

use Tk;
use Tk::ProgressBar;

my $mw = MainWindow->new;                                
my $pb = $mw->ProgressBar()->pack();

my $repeat;
$repeat = $mw->repeat( 100 => sub {
    while( $Q->pending ) {
        my $progress = $Q->dequeue;
        return unless $progress;
        $repeat->cancel if $progress == 100;
        $pb->value( $progress )
    }
} );

$mw->Button( 
      '-text'   => 'Cancel',
      '-command' => sub {$mw->destroy})->pack();

$mw->MainLoop;

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In reply to Re: Tk and IPC - killing of process not working in Linux by Khen1950fx
in thread Tk and IPC - killing of process not working in Linux by Dirk80

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