textToSource.scala

implicit def textToSource(text: Text): Source[String] = {
    new Source[String] {
      override def emitTo(channel: Var[String]) {
        text.addModifyListener(new ModifyListener() {
          override def modifyText(event: ModifyEvent) = {
            channel.update(text.getText)
          }
        })
      }
    }