private void updateTextFieldShowing() {
    myTextFieldAction.update();
    myNorthPanel.remove(myPathTextFieldWrapper);
    if (isToShowTextField()) {
      final ArrayList<VirtualFile> selection = new ArrayList<VirtualFile>();
      if (myFileSystemTree.getSelectedFile() != null) {
        selection.add(myFileSystemTree.getSelectedFile());
      }
      updatePathFromTree(selection, true);
      myNorthPanel.add(myPathTextFieldWrapper, BorderLayout.CENTER);
    } else {
      setErrorText(null);
    }
    myPathTextField.getField().requestFocus();

    myNorthPanel.revalidate();
    myNorthPanel.repaint();
  }
  protected JComponent createCenterPanel() {
    JPanel panel = new MyPanel();

    myUiUpdater = new MergingUpdateQueue("FileChooserUpdater", 200, false, panel);
    Disposer.register(myDisposable, myUiUpdater);
    new UiNotifyConnector(panel, myUiUpdater);

    panel.setBorder(JBUI.Borders.empty());

    createTree();

    final DefaultActionGroup group = createActionGroup();
    ActionToolbar toolBar =
        ActionManager.getInstance().createActionToolbar(ActionPlaces.UNKNOWN, group, true);
    toolBar.setTargetComponent(panel);

    final JPanel toolbarPanel = new JPanel(new BorderLayout());
    toolbarPanel.add(toolBar.getComponent(), BorderLayout.CENTER);

    myTextFieldAction =
        new TextFieldAction() {
          public void linkSelected(final LinkLabel aSource, final Object aLinkData) {
            toggleShowTextField();
          }
        };
    toolbarPanel.add(myTextFieldAction, BorderLayout.EAST);

    myPathTextFieldWrapper = new JPanel(new BorderLayout());
    myPathTextFieldWrapper.setBorder(JBUI.Borders.emptyBottom(2));
    myPathTextField =
        new FileTextFieldImpl.Vfs(
            FileChooserFactoryImpl.getMacroMap(),
            getDisposable(),
            new LocalFsFinder.FileChooserFilter(myChooserDescriptor, myFileSystemTree)) {
          protected void onTextChanged(final String newValue) {
            myUiUpdater.cancelAllUpdates();
            updateTreeFromPath(newValue);
          }
        };
    Disposer.register(myDisposable, myPathTextField);
    myPathTextFieldWrapper.add(myPathTextField.getField(), BorderLayout.CENTER);
    if (getRecentFiles().length > 0) {
      myPathTextFieldWrapper.add(createHistoryButton(), BorderLayout.EAST);
    }

    myNorthPanel = new JPanel(new BorderLayout());
    myNorthPanel.add(toolbarPanel, BorderLayout.NORTH);

    updateTextFieldShowing();

    panel.add(myNorthPanel, BorderLayout.NORTH);

    registerMouseListener(group);

    JScrollPane scrollPane = ScrollPaneFactory.createScrollPane(myFileSystemTree.getTree());
    // scrollPane.setBorder(BorderFactory.createLineBorder(new Color(148, 154, 156)));
    panel.add(scrollPane, BorderLayout.CENTER);
    panel.setPreferredSize(JBUI.size(400));

    panel.add(
        new JLabel(
            "<html><center><small><font color=gray>Drag and drop a file into the space above to quickly locate it in the tree.</font></small></center></html>",
            SwingConstants.CENTER),
        BorderLayout.SOUTH);

    ApplicationManager.getApplication()
        .getMessageBus()
        .connect(getDisposable())
        .subscribe(
            ApplicationActivationListener.TOPIC,
            new ApplicationActivationListener.Adapter() {
              @Override
              public void applicationActivated(IdeFrame ideFrame) {
                ((SaveAndSyncHandlerImpl) SaveAndSyncHandler.getInstance())
                    .maybeRefresh(ModalityState.current());
              }
            });

    return panel;
  }