@Override
  public void setPopupVisible(boolean visible) {
    if (!isSwingPopup()) {
      if (visible && (myJBPopup == null || myJBPopup.isDisposed())) {
        final JBList list = createJBList(getModel());
        myJBPopup =
            JBPopupFactory.getInstance()
                .createListPopupBuilder(list)
                .setItemChoosenCallback(
                    new Runnable() {
                      @Override
                      public void run() {
                        final Object value = list.getSelectedValue();
                        if (value != null) {
                          configureEditor(getEditor(), value);
                          IdeFocusManager.getGlobalInstance().requestFocus(ComboBox.this, true);
                          assert myJBPopup != null;
                          ComboBox.this.getUI().setPopupVisible(ComboBox.this, false);
                          myJBPopup.cancel();
                        }
                      }
                    })
                .setFocusOwners(new Component[] {this})
                .setMinSize(new Dimension(getWidth(), -1))
                .createPopup();
        list.setBorder(IdeBorderFactory.createEmptyBorder());
        myJBPopup.showUnderneathOf(this);
        list.addFocusListener(
            new FocusAdapter() {
              @Override
              public void focusLost(FocusEvent e) {
                ComboBox.this.getUI().setPopupVisible(ComboBox.this, false);
                myJBPopup.cancel();
              }
            });
      }
      return;
    }

    if (getModel().getSize() == 0 && visible) return;
    if (visible && JBPopupFactory.getInstance().getChildFocusedPopup(this) != null) return;

    final boolean wasShown = isPopupVisible();
    super.setPopupVisible(visible);
    if (!wasShown
        && visible
        && isEditable()
        && !UIManager.getBoolean("ComboBox.isEnterSelectablePopup")) {

      final ComboBoxEditor editor = getEditor();
      final Object item = editor.getItem();
      final Object selectedItem = getSelectedItem();
      if (isSwingPopup() && (item == null || item != selectedItem)) {
        configureEditor(editor, selectedItem);
      }
    }
  }
  @SuppressWarnings("unchecked")
  private void createUIComponents() {
    final JBList projectExistLocalesList = new JBList();
    final MyExistLocalesListModel existLocalesListModel = new MyExistLocalesListModel();
    projectExistLocalesList.setModel(existLocalesListModel);
    projectExistLocalesList.setCellRenderer(getLocaleRenderer());
    myProjectExistLocalesPanel =
        ToolbarDecorator.createDecorator(projectExistLocalesList)
            .disableRemoveAction()
            .disableUpDownActions()
            .createPanel();
    myProjectExistLocalesPanel.setBorder(
        IdeBorderFactory.createTitledBorder("Project locales", false));

    final JBList localesToAddList = new JBList();

    final List<Locale> locales;
    final List<Locale> restrictedLocales;
    if (myResourceBundle == null) {
      locales = Collections.singletonList(PropertiesUtil.DEFAULT_LOCALE);
      restrictedLocales = Collections.emptyList();
    } else {
      locales = Collections.emptyList();
      restrictedLocales =
          ContainerUtil.map(myResourceBundle.getPropertiesFiles(), PropertiesFile::getLocale);
    }
    myLocalesModel =
        new CollectionListModel<Locale>(locales) {
          @Override
          public void add(@NotNull List<? extends Locale> elements) {
            final List<Locale> currentItems = getItems();
            elements =
                ContainerUtil.filter(
                    elements,
                    locale ->
                        !restrictedLocales.contains(locale) && !currentItems.contains(locale));
            super.add(elements);
          }
        };
    localesToAddList.setModel(myLocalesModel);
    localesToAddList.setCellRenderer(getLocaleRenderer());
    localesToAddList.addFocusListener(
        new FocusAdapter() {
          @Override
          public void focusGained(FocusEvent e) {
            projectExistLocalesList.clearSelection();
          }
        });
    projectExistLocalesList.addFocusListener(
        new FocusAdapter() {
          @Override
          public void focusGained(FocusEvent e) {
            localesToAddList.clearSelection();
          }
        });

    myNewBundleLocalesPanel =
        ToolbarDecorator.createDecorator(localesToAddList)
            .setAddAction(
                new AnActionButtonRunnable() {
                  @Override
                  public void run(AnActionButton button) {
                    final String rawAddedLocales =
                        Messages.showInputDialog(
                            myProject,
                            PropertiesBundle.message(
                                "create.resource.bundle.dialog.add.locales.validator.message"),
                            PropertiesBundle.message(
                                "create.resource.bundle.dialog.add.locales.validator.title"),
                            null,
                            null,
                            new InputValidatorEx() {
                              @Nullable
                              @Override
                              public String getErrorText(String inputString) {
                                return checkInput(inputString) ? null : "Invalid locales";
                              }

                              @Override
                              public boolean checkInput(String inputString) {
                                return extractLocalesFromString(inputString) != null;
                              }

                              @Override
                              public boolean canClose(String inputString) {
                                return checkInput(inputString);
                              }
                            });
                    if (rawAddedLocales != null) {
                      final List<Locale> locales = extractLocalesFromString(rawAddedLocales);
                      LOG.assertTrue(locales != null);
                      myLocalesModel.add(locales);
                    }
                  }
                })
            .setAddActionName("Add locales by suffix")
            .disableUpDownActions()
            .createPanel();
    myNewBundleLocalesPanel.setBorder(IdeBorderFactory.createTitledBorder("Locales to add", false));

    myAddLocaleFromExistButton = new JButton(AllIcons.Actions.Forward);
    new ClickListener() {
      @Override
      public boolean onClick(@NotNull MouseEvent event, int clickCount) {
        if (clickCount == 1) {
          myLocalesModel.add(
              ContainerUtil.map(projectExistLocalesList.getSelectedValues(), o -> (Locale) o));
          return true;
        }
        return false;
      }
    }.installOn(myAddLocaleFromExistButton);

    projectExistLocalesList.addListSelectionListener(
        new ListSelectionListener() {
          @Override
          public void valueChanged(ListSelectionEvent e) {
            final List<Locale> currentItems = myLocalesModel.getItems();
            for (Object o : projectExistLocalesList.getSelectedValues()) {
              Locale l = (Locale) o;
              if (!restrictedLocales.contains(l) && !currentItems.contains(l)) {
                myAddLocaleFromExistButton.setEnabled(true);
                return;
              }
            }
            myAddLocaleFromExistButton.setEnabled(false);
          }
        });
    myAddLocaleFromExistButton.setEnabled(false);

    myAddAllButton = new JButton("Add All");
    new ClickListener() {
      @Override
      public boolean onClick(@NotNull MouseEvent event, int clickCount) {
        if (clickCount == 1) {
          myLocalesModel.add(existLocalesListModel.getLocales());
        }
        return false;
      }
    }.installOn(myAddAllButton);
  }