How to use

focusedProperty

method

in

javafx.scene.control.ComboBoxBase

private void removeParentFakeFocusListener(ComboBoxBase<T> comboBoxBase) {
  // handle FakeFocusField cast exception
  try {
    final ReadOnlyBooleanProperty focusedProperty = comboBoxBase.focusedProperty();
    ExpressionHelper value = ReflectionHelper.getFieldContent(focusedProperty.getClass().getSuperclass(), focusedProperty, "helper");
    ChangeListener[] changeListeners = ReflectionHelper.getFieldContent(value.getClass(), value, "changeListeners");
    // remove parent focus listener to prevent editor class cast exception
    for(int i = changeListeners.length - 1; i > 0; i--) {
      if (changeListeners[i] != null && changeListeners[i].getClass().getName().contains("ComboBoxPopupControl")) {
        focusedProperty.removeListener(changeListeners[i]);
        break;
      }
    }
  } catch (Exception e) {
    e.printStackTrace();
  }
}

public AquaComboBoxListViewSkin(ComboBox<T> comboBox) {
  super(comboBox);
  registerChangeListener(comboBox.disabledProperty(), "DISABLED");
  if (getSkinnable().isFocused()) {
    setFocusBorder();
  } else if (!getSkinnable().isFocused() && !getSkinnable().isDisabled()) {
    setDropShadow();
  }
  for (Object child : getChildren()) {
    ((Node) child).focusedProperty().addListener(focusListener);
  }
  if (comboBox.isEditable()) {
    getDisplayNode().focusedProperty().addListener(focusListener);
  }
  getSkinnable().focusedProperty().addListener(focusListener);
}