def start client
            app = Qt::Application.new ['main.rb']

            socket = client.connect
            notif = Qt::SocketNotifier.new socket.fileno, Qt::SocketNotifier::Read

            main = MainWindow.new

            notif.connect SIGNAL('activated(int)') do
                notif.enabled = false
                data = client.read
                main.append_message data
                notif.enabled = true
            end

            main.connect SIGNAL('send_input(QString)') do |msg|
                client.write msg
            end

            main.show
            app.exec
        end