val mkOk = (comp:Composite) => {
      val ok = new Button(comp, SWT.PUSH)
      ok.setText("OK")
      ok.addSelectionListener(new SelectionAdapter() {
        var running = false
        override def widgetSelected(e: SelectionEvent) {
          if (running) {

          } else {
            running = true
            val input = JsonField.mkObject(Seq(t1, t2, t3, t4))
            val t = new TimedThread {
                var killproc:Option[() => Unit] = None
                val name = "Send email"
                val runnable = new Runnable {
                  val (destroy, doact) = exec(Seq("python", "C:/Users/M/Desktop/test.py"), input)
                  killproc = Some(destroy)

                  override def run() {
                    Log.info("Sending email")
                    val (out,err,retval) = doact()
                  }
                }

                override def cleanup() {
                  running = false
                }
                override def kill() {
                  try {
                    killproc foreach (_())
                  } catch {
                    case e:Exception => Log.warn(e.getMessage)
                  }
                }
              }
              t.start()
            }
          }
        })
        ok
      }