Re: TK MainLoop and Sockets

[zentara]

Well you are not showing your code, so all we can do is guess and show code that works. I tend to go in phases with sockets...I get all into it, then it all fades out of my active memory, and it gets hazy. Anyways, the last time I dove in to Tk and sockets, I came up with this as a working example with fork. This is the set of snippets I refer to as a basic starting point for forking Tk sockets with Select. So run them, and see how to make your scripts work the same. They are sort of a "minimal proof of concept".

#######the server##############################
#!/usr/bin/perl -w
use strict;
use IO::Select;
use IO::Socket;
$| = 1;
# create the socket 

my $host = shift || 'localhost';
my $port = 12345;

my $socket = IO::Socket::INET->new(
       LocalPort => $port,
       LocalAddr => $host,
       Listen    => 5,
       Proto     => 'tcp',
       Reuse     => 1,
      );

defined $socket or die "ERROR: Can't create socket: $!\n";

print STDERR "Socket open ... listening for incoming calls ..\n";

my $select = IO::Select->new($socket);

my %socks;

while (1) {
    foreach my $fh ($select->can_read) {
 if ($fh == $socket) {
     # new connection 
     my $new = $socket->accept;
     $select->add($new);
     $socks{$new}{FH} = $new;
     print STDERR "Received new connection ($new) ..\n";
 } else {
     my $data = <$fh>;
     if (defined $data) {
  $data =~ tr/\r\n//d;

  foreach my $handle (keys %socks) {
      print {$socks{$handle}{FH}} "$handle $data\n";
  }
     } else {
  print "BYE $fh.\n";
  $select->remove($fh);
  delete $socks{$fh};
  $fh->close;
     }
 }
    }
}

########the client######################
<code>

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

require Tk::ROText;

# create the socket 

my $host = shift || 'localhost';
my $port = 12345;

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 $log = $mw->Scrolled(qw/ROText -scrollbars ose/)->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;
      }

      $log->insert(end => $line);
  });


MainLoop;

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

    my $text = $ent->get;
    $ent->delete(qw/0 end/);

    print $sock $text, "\n";
}