#!/usr/bin/perl -w

use strict;
use Gtk2 '-init';
use Gtk2::Helper;
use Data::Dumper;
use IPC::Open2;
use FileHandle;

# file handles
my $wfh = FileHandle->new();
my $rfh = FileHandle->new();
open2($rfh,$wfh, "C:\\Windows\\System32\\cmd.exe");
my $tag = Gtk2::Helper->add_watch($rfh->fileno(), 'in',\&preview_call);


my $window = Gtk2::Window->new();
$window->signal_connect("destroy",sub{Gtk2->main_quit();});
$window->set_size_request(200,200);
	my $vbox = Gtk2::VBox->new();
	$window->add($vbox);
		my $button = Gtk2::Button->new("TEST");
		$button->signal_connect('clicked'=>sub{
				mysub();
			});
		$vbox->pack_start($button,0,0,0);
		
$window->show_all();
Gtk2->main();

sub preview_call {
	my $buffer;
	my $rl = sysread($rfh,$buffer,1);
	if(defined($rl)){
		print "$rl + $buffer\n";
		while (Gtk2->events_pending()) {Gtk2->main_iteration();}
		return 1;
	}else{
		print "undefined\n";
		return 0;
	}
}

sub mysub {
	print $wfh "echo wako\n";
}