private void progress(String p) {
   synchronized (ui) {
     if (progress != null) progress = null;
     if (p != null) progress = textfs.render(p, java.awt.Color.WHITE);
   }
 }
 private void error(String error) {
   synchronized (ui) {
     if (this.error != null) this.error = null;
     if (error != null) this.error = textf.render(error, java.awt.Color.RED);
   }
 }