#!/usr/bin/perl
use warnings;
use strict;
use Tk;
use IO::Socket;
require Tk::ROText;
use Data::Dumper;

# create the socket

my $host = shift || 'localhost';
my $port = 7070;

my $socket = IO::Socket::INET->new(
       PeerAddr => $host,
       PeerPort => $port,
       Proto    => 'tcp',
      );

defined $socket or die "ERROR: Can't connect to port $port on $host: $!\n";

print STDERR "Connected to server ...\n";

my $mw  = new MainWindow;
my $text = $mw->Scrolled('Text',
                         -background =>'black',
                         -foreground => 'yellow',
             )->pack();      

my $txt = $mw->Entry()->pack(qw/-fill x -pady 5/);

$mw ->bind('<Any-Enter>' => sub { $txt->Tk::focus });
$txt->bind('<Return>' => [\&broadcast, $socket]);

$mw ->fileevent($socket, readable => sub {
                    my $line = <$socket>;
                      unless (defined $line) {
                       $mw->fileevent($socket => readable => '');
                       return;
                       }
         $text->insert(end => $line);
  });

$mw->fileevent($socket, 'readable', sub { handle_connection($socket) });

MainLoop;

sub broadcast {
    my ($ent, $sock) = @_;

    my $text = $ent->get;

    $ent->delete(qw/0 end/);
    $sock->print("$text\n");
}

sub handle_connection {
    my ($client) = @_;

    my $message = <$client>;
    
    if (defined $message and $message !~ /^quit/) {
     $message =~ s/[\r\n]+$//;
     $text->insert('end', "Got message [$message]\n");
     $text->see('end');
    }
    else {
       $text->insert('end', "Connection Closed\n");
       $text->see('end');
       $client->close();
    }
}

##</code><code>##


#!/usr/bin/perl
use warnings;
use strict;
use Tk;
use IO::Socket;
require Tk::ROText;

use Data::Dumper;
# create the socket

my $host = shift || 'localhost';
my $port = 7070;

my $socket = IO::Socket::INET->new(
    LocalPort => $port,
    Listen => 1,
    Reuse => 1,
    Proto    => 'tcp',
      );

defined $socket or die "ERROR: Can't connect to port $port on $host: $!\n";

my $mw  = new MainWindow;

my $text = $mw->Scrolled('Text',
                         -background =>'black',
                         -foreground => 'yellow',
             )->pack();      

my $txt = $mw->Entry()->pack(qw/-fill x -pady 5/);

$mw ->bind('<Any-Enter>' => sub { $txt->Tk::focus });
$txt->bind('<Return>' => [\&broadcast, $socket]);

$mw ->fileevent($socket, readable => sub {
                    my $line = <$socket>;
                      unless (defined $line) {
                       $mw->fileevent($socket => readable => '');
                       return;
                       }
         $text->insert(end => $line);
  });

my $client;

$mw->fileevent($socket, 'readable', sub { new_connection($socket) });

MainLoop;

sub broadcast {
    my ($ent, $sock) = @_;

    my $txt = $ent->get;
    
    $ent->delete(qw/0 end/);
    
    $text->insert('end', "Sending [$txt]\n");
    $text->see('end');
    $client->print("$txt\n");
}

sub new_connection {
    my ($listen) = @_;
    
    $client = $listen->accept() or warn "Can't accept connection";
    $client->autoflush(1);
    $mw->fileevent($client, 'readable', sub { handle_connection($client) });
    $client->print("Connected\n");
    $text->insert('end', "Connected\n");
    $text->see('end');
}

sub handle_connection {
    my ($client) = @_;

    my $message = <$client>;
    if (defined $message and $message !~ /^quit/) {
        $message =~ s/[\r\n]+$//;
        $client->print("successfully sent $message\n");
        $text->insert('end', "Got message [$message]\n");
        $text->see('end');
    }
    else {
       $text->insert('end', "Connection Closed\n");
       $text->see('end');
       $client->close();
    }
}