use Tk;

use IPC::Open3;

use IO::Handle;

use Win32::Process::Kill;

use threads;
use threads::shared;

use Thread::Queue;

$q=Thread::Queue->new;
$qe=Thread::Queue->new;

unlink('out.txt');

my %font=(-font=>[-family=>'Courier New',-size=>10]);
my %width=(-width=>120);

$pid = open3( \*CHILD_IN, \*CHILD_OUT, \*CHILD_ERR, 'cmd.exe' );

print "pid = $pid\n";

sleep(1);

threads->create(\&handle_child_out)->detach;
threads->create(\&handle_child_err)->detach;

print "threads created\n";

autoflush CHILD_OUT;
autoflush CHILD_ERR;

my %font=(-font=>[-family=>'Courier New',-size=>10]);
my %width=(-width=>118);

my $mw=new MainWindow;

my $entry=$mw->Entry(
	%width,
	-relief=>'groove',
	-borderwidth=>5,
	-textvariable=>\$entry_text,
	%font
	)->pack;
	
$entry->focus;
	
$entry->bind('<Key-Return>',\&enter);

my $text=$mw->Scrolled('Text',
	-insertontime=>0,
	-scrollbars=>'e',
	%font,
	%width,
	-height=>43
	)->pack;

my $geom=$mw->geometry;
$geom='+5+5';
$mw->geometry($geom);
	
$mw->after(500,\&handler);

MainLoop;

Kill($pid);

sub enter
	{
	
	print CHILD_IN "$entry_text\n";
	
	$entry_text='';
	
	$entry->focus;
	
	}

sub handler
	{
	
	while(($q->pending)||($qe->pending))
		{
		my ($content,$contente);
		
		if($q->pending)
			{
			$content=$q->dequeue;
			$content=~s/\r//g;
			}
			
		if($qe->pending)
			{
			$contente=$qe->dequeue;
			$contente=~s/\r//g;
			}
			
		my ($x,$y)=$text->yview();
		$text->insert('1.0',"$content$contente");
		$text->yview(moveto=>$x);
		
		$entry->focus;
		}
	
	$mw->after(500,\&handler);
	
	}

sub handle_child_out
{
sleep(1);
do
	{
	
	sysread CHILD_OUT, $content, 4092;
	if($content ne '')
		{
		
		$q->enqueue($content);
		
		}
	
	}
	while(1);
}

sub handle_child_err
{
sleep(1);
do
	{
	
	sysread CHILD_ERR, $content, 4092;
	if($content ne '')
		{
		
		$q->enqueue($content);
		
		}
	
	}
	while(1);
}