private void updatePreview() {
    if (myAdjusting) return;
    String prop = getSystemProp();
    String value = calcNewValue();
    System.setProperty(myPropertyTmp, value);
    myResults.put(prop, value);
    myPreviewPanel.validate();
    myPreviewPanel.repaint();
    boolean clear = value.startsWith(",");
    getOKAction().setEnabled(!clear);
  }
private void updatePreview()