abstract sclass DynPrintLog extends DynModule {
  transient JTextArea ta;
  transient Lock updatePrintLog_lock = lock();
  transient StringBuilder actualPrintLog;
  
  JComponent visualize() {
    ret awtEvery(
      jSection("Log", ta = moveCaretToEnd(typeWriterTextArea(getPrintLog()))),
      500, r updatePrintLog);
  }
  
  void updatePrintLog {
    // TODO: optimize
    lock updatePrintLog_lock;
    if (ta != null) setText(ta, getPrintLog());
  }
  
  JTextArea myPrintLogComponent() { ret ta; }
  
  void enableWordWrap {
    enableWordWrapForTextArea(ta);
  }
  
  StringBuilder getPrintLog() {
    ret str(or(actualPrintLog, liveLocalPrintLog()));
  }
}