Hi, this is a Perl question. I have been trying to embed an xterm into a Tk or Gtk2 perl gui. Now I have been succesful with Tk, but Gtk2 loses keyboard focus. I had given up on it, until I tested rxvt-unicode which successfully embedded the rxvt into a Gtk2 perl window. However, when I try to use an xterm instead, the keyboard focus gets lost.

So can anyone explain what is happening? You need a relatively recent version of xterm, to support the "-into xid" function.

Tk works with an embedded xterm or rxvt

#!/usr/bin/perl -w
use strict;
use Tk;

my $mw = MainWindow->new();

my $xtermContainer = $mw->Frame(-height=>400,
                                -width=>300,
                                -container => 1)->pack();

my $xtid = $xtermContainer->id();
print "$xtid\n";
# converting the id from HEX to decimal as xterm requires a decimal Id
+  
my ($xtId) = sprintf hex $xtid;
print "$xtId\n";

$mw->Button(-text => "Exit",
           -command => sub{ exit}
           )->pack(  );
$mw->Button(-text => "Xterm",
          -command => sub{ system("xterm -into $xtId  &") }
          )->pack(  );

MainLoop();
[download]

The following Gtk2 script works with rxvt-unicode but not xterm , which loses keyboard

#!/usr/bin/perl

# sample script to illustrate the -embed option
# embed a rxvt inside another X app
# see also pty-fd
# doesn't handle sigchld

use Gtk2;

init Gtk2;

my $window = new Gtk2::Window 'toplevel';
$window ->signal_connect( 'destroy' => sub{ Gtk2->main_quit;
                                           return FALSE;
                                          } );

my $frame = new Gtk2::Frame "embedded rxvt-unicode terminal";

$window->add ($frame);

my $rxvt = new Gtk2::Socket;

$frame->add ($rxvt);
$frame->set_size_request (700, 400);
$window->show_all;
my $xid = $rxvt->window->get_xid;

# works with rxvt but xterm loses keyboard focus
system "./rxvt -embed $xid &";
#system "xterm -into $xid &";

$window->show_all;

main Gtk2;
[download]