use strict;
use warnings;

$|=1;
print "$_\n" and select(undef,undef,undef,0.1) for 1 .. 1000;

##</code><code>##

#!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 (CHILD_PROC, "perl child.pl |") or die $!;

	while( <CHILD_PROC> ) {
		$Q->enqueue( $_ );
	}
	close( CHILD_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{ kill 9, $pid; exit(0); })->pack();

# No suspend and kill button because
# the signals SIGSTOP and SIGCONT do not exist for Windows 

$mw->MainLoop;

##</code><code>##

#!perl -slw
use strict;
use threads;
use threads::shared;
use Thread::Queue;

use Win32::Process;
use Win32;

use Data::Dumper;

sub ErrorReport
{
    print Win32::FormatMessage( Win32::GetLastError() );
}

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

sub work{
    # save STDOUT
    open(my $STDOUT_ORIG, ">&", \*STDOUT) or die;

    # connect TO_CHILD_PROC with CHILD_PROC
    pipe(CHILD_PROC, TO_CHILD_PROC);

    # change STDOUT to TO_CHILD_PROC
    # --> STDOUT of child process is set to TO_CHILD_PROC and
    #     this is connected via pipe with CHILD_PROC
    open(STDOUT, ">&", \*TO_CHILD_PROC);
    
	Win32::Process::Create($ProcessObj,
                           "C:\\Perl\\bin\\perl.exe",
                           "perl child.pl",
                           1,
                           NORMAL_PRIORITY_CLASS,
                           ".")|| die ErrorReport();

    $ProcessObj_as_string = Dumper($ProcessObj);
    
    # restore STDOUT
    open(STDOUT, ">&", $STDOUT_ORIG) or die;

    while( <CHILD_PROC> )
	{
		chomp($_);
		$Q->enqueue( $_ );		  
	}	 
     
	close( CHILD_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
            {
                my $VAR1;
                $ProcessObj = eval($ProcessObj_as_string);
                $ProcessObj->Kill(0);
                exit 0;
            })->pack();

$mw->Button('-text' => 'Suspend',
			'-command' =>
            sub
            {
                my $VAR1;
                $ProcessObj = eval($ProcessObj_as_string);
                $ProcessObj->Suspend();
            })->pack();

$mw->Button('-text' => 'Resume',
			'-command' =>
            sub
            {
                my $VAR1;
                $ProcessObj = eval($ProcessObj_as_string);
                $ProcessObj->Resume();
            })->pack();

$mw->MainLoop;