public void actionPerformed(ActionEvent e) {
      if (readOnly) {
        return;
      }
      JFileChooser fc = getFileChooser();
      File currentDirectory = fc.getCurrentDirectory();

      if (!currentDirectory.exists()) {
        JOptionPane.showMessageDialog(
            fc,
            newFolderParentDoesntExistText,
            newFolderParentDoesntExistTitleText,
            JOptionPane.WARNING_MESSAGE);
        return;
      }

      File newFolder;
      try {
        newFolder = fc.getFileSystemView().createNewFolder(currentDirectory);
        if (fc.isMultiSelectionEnabled()) {
          fc.setSelectedFiles(new File[] {newFolder});
        } else {
          fc.setSelectedFile(newFolder);
        }
      } catch (IOException exc) {
        JOptionPane.showMessageDialog(
            fc,
            newFolderErrorText + newFolderErrorSeparator + exc,
            newFolderErrorText,
            JOptionPane.ERROR_MESSAGE);
        return;
      }

      fc.rescanCurrentDirectory();
    }
    public void actionPerformed(ActionEvent e) {
      if (isDirectorySelected()) {
        File dir = getDirectory();
        if (dir != null) {
          try {
            // Strip trailing ".."
            dir = ShellFolder.getNormalizedFile(dir);
          } catch (IOException ex) {
            // Ok, use f as is
          }
          changeDirectory(dir);
          return;
        }
      }

      JFileChooser chooser = getFileChooser();

      String filename = getFileName();
      FileSystemView fs = chooser.getFileSystemView();
      File dir = chooser.getCurrentDirectory();

      if (filename != null) {
        // Remove whitespaces from end of filename
        int i = filename.length() - 1;

        while (i >= 0 && filename.charAt(i) <= ' ') {
          i--;
        }

        filename = filename.substring(0, i + 1);
      }

      if (filename == null || filename.length() == 0) {
        // no file selected, multiple selection off, therefore cancel the approve action
        resetGlobFilter();
        return;
      }

      File selectedFile = null;
      File[] selectedFiles = null;

      // Unix: Resolve '~' to user's home directory
      if (File.separatorChar == '/') {
        if (filename.startsWith("~/")) {
          filename = System.getProperty("user.home") + filename.substring(1);
        } else if (filename.equals("~")) {
          filename = System.getProperty("user.home");
        }
      }

      if (chooser.isMultiSelectionEnabled()
          && filename.length() > 1
          && filename.charAt(0) == '"'
          && filename.charAt(filename.length() - 1) == '"') {
        List<File> fList = new ArrayList<File>();

        String[] files = filename.substring(1, filename.length() - 1).split("\" \"");
        // Optimize searching files by names in "children" array
        Arrays.sort(files);

        File[] children = null;
        int childIndex = 0;

        for (String str : files) {
          File file = fs.createFileObject(str);
          if (!file.isAbsolute()) {
            if (children == null) {
              children = fs.getFiles(dir, false);
              Arrays.sort(children);
            }
            for (int k = 0; k < children.length; k++) {
              int l = (childIndex + k) % children.length;
              if (children[l].getName().equals(str)) {
                file = children[l];
                childIndex = l + 1;
                break;
              }
            }
          }
          fList.add(file);
        }

        if (!fList.isEmpty()) {
          selectedFiles = fList.toArray(new File[fList.size()]);
        }
        resetGlobFilter();
      } else {
        selectedFile = fs.createFileObject(filename);
        if (!selectedFile.isAbsolute()) {
          selectedFile = fs.getChild(dir, filename);
        }
        // check for wildcard pattern
        FileFilter currentFilter = chooser.getFileFilter();
        if (!selectedFile.exists() && isGlobPattern(filename)) {
          changeDirectory(selectedFile.getParentFile());
          if (globFilter == null) {
            globFilter = new GlobFilter();
          }
          try {
            globFilter.setPattern(selectedFile.getName());
            if (!(currentFilter instanceof GlobFilter)) {
              actualFileFilter = currentFilter;
            }
            chooser.setFileFilter(null);
            chooser.setFileFilter(globFilter);
            return;
          } catch (PatternSyntaxException pse) {
            // Not a valid glob pattern. Abandon filter.
          }
        }

        resetGlobFilter();

        // Check for directory change action
        boolean isDir = (selectedFile != null && selectedFile.isDirectory());
        boolean isTrav = (selectedFile != null && chooser.isTraversable(selectedFile));
        boolean isDirSelEnabled = chooser.isDirectorySelectionEnabled();
        boolean isFileSelEnabled = chooser.isFileSelectionEnabled();
        boolean isCtrl =
            (e != null
                && (e.getModifiers() & Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()) != 0);

        if (isDir && isTrav && (isCtrl || !isDirSelEnabled)) {
          changeDirectory(selectedFile);
          return;
        } else if ((isDir || !isFileSelEnabled)
            && (!isDir || !isDirSelEnabled)
            && (!isDirSelEnabled || selectedFile.exists())) {
          selectedFile = null;
        }
      }

      if (selectedFiles != null || selectedFile != null) {
        if (selectedFiles != null || chooser.isMultiSelectionEnabled()) {
          if (selectedFiles == null) {
            selectedFiles = new File[] {selectedFile};
          }
          chooser.setSelectedFiles(selectedFiles);
          // Do it again. This is a fix for bug 4949273 to force the
          // selected value in case the ListSelectionModel clears it
          // for non-existing file names.
          chooser.setSelectedFiles(selectedFiles);
        } else {
          chooser.setSelectedFile(selectedFile);
        }
        chooser.approveSelection();
      } else {
        if (chooser.isMultiSelectionEnabled()) {
          chooser.setSelectedFiles(null);
        } else {
          chooser.setSelectedFile(null);
        }
        chooser.cancelSelection();
      }
    }
  public void installComponents(JFileChooser fc) {
    fc.setLayout(new BorderLayout(10, 10));
    fc.setAlignmentX(JComponent.CENTER_ALIGNMENT);

    JPanel interior =
        new JPanel() {
          public Insets getInsets() {
            return insets;
          }
        };
    align(interior);
    interior.setLayout(new BoxLayout(interior, BoxLayout.PAGE_AXIS));

    fc.add(interior, BorderLayout.CENTER);

    // PENDING(jeff) - I18N
    JLabel l = new JLabel(pathLabelText);
    l.setDisplayedMnemonic(pathLabelMnemonic);
    align(l);
    interior.add(l);

    File currentDirectory = fc.getCurrentDirectory();
    String curDirName = null;
    if (currentDirectory != null) {
      curDirName = currentDirectory.getPath();
    }
    pathField =
        new JTextField(curDirName) {
          public Dimension getMaximumSize() {
            Dimension d = super.getMaximumSize();
            d.height = getPreferredSize().height;
            return d;
          }
        };
    l.setLabelFor(pathField);
    align(pathField);

    // Change to folder on return
    pathField.addActionListener(getUpdateAction());
    interior.add(pathField);

    interior.add(Box.createRigidArea(vstrut10));

    // CENTER: left, right accessory
    JPanel centerPanel = new JPanel();
    centerPanel.setLayout(new BoxLayout(centerPanel, BoxLayout.LINE_AXIS));
    align(centerPanel);

    // left panel - Filter & folderList
    JPanel leftPanel = new JPanel();
    leftPanel.setLayout(new BoxLayout(leftPanel, BoxLayout.PAGE_AXIS));
    align(leftPanel);

    // add the filter PENDING(jeff) - I18N
    l = new JLabel(filterLabelText);
    l.setDisplayedMnemonic(filterLabelMnemonic);
    align(l);
    leftPanel.add(l);

    filterComboBox =
        new JComboBox() {
          public Dimension getMaximumSize() {
            Dimension d = super.getMaximumSize();
            d.height = getPreferredSize().height;
            return d;
          }
        };
    l.setLabelFor(filterComboBox);
    filterComboBoxModel = createFilterComboBoxModel();
    filterComboBox.setModel(filterComboBoxModel);
    filterComboBox.setRenderer(createFilterComboBoxRenderer());
    fc.addPropertyChangeListener(filterComboBoxModel);
    align(filterComboBox);
    leftPanel.add(filterComboBox);

    // leftPanel.add(Box.createRigidArea(vstrut10));

    // Add the Folder List PENDING(jeff) - I18N
    l = new JLabel(foldersLabelText);
    l.setDisplayedMnemonic(foldersLabelMnemonic);
    align(l);
    leftPanel.add(l);
    JScrollPane sp = createDirectoryList();
    sp.getVerticalScrollBar().setFocusable(false);
    sp.getHorizontalScrollBar().setFocusable(false);
    l.setLabelFor(sp.getViewport().getView());
    leftPanel.add(sp);

    // create files list
    JPanel rightPanel = new JPanel();
    align(rightPanel);
    rightPanel.setLayout(new BoxLayout(rightPanel, BoxLayout.PAGE_AXIS));

    l = new JLabel(filesLabelText);
    l.setDisplayedMnemonic(filesLabelMnemonic);
    align(l);
    rightPanel.add(l);
    sp = createFilesList();
    l.setLabelFor(sp);
    rightPanel.add(sp);

    centerPanel.add(leftPanel);
    centerPanel.add(Box.createRigidArea(hstrut10));
    centerPanel.add(rightPanel);

    JComponent accessoryPanel = getAccessoryPanel();
    JComponent accessory = fc.getAccessory();
    if (accessoryPanel != null) {
      if (accessory == null) {
        accessoryPanel.setPreferredSize(ZERO_ACC_SIZE);
        accessoryPanel.setMaximumSize(ZERO_ACC_SIZE);
      } else {
        getAccessoryPanel().add(accessory, BorderLayout.CENTER);
        accessoryPanel.setPreferredSize(PREF_ACC_SIZE);
        accessoryPanel.setMaximumSize(MAX_SIZE);
      }
      align(accessoryPanel);
      centerPanel.add(accessoryPanel);
    }
    interior.add(centerPanel);
    interior.add(Box.createRigidArea(vstrut10));

    // add the filename field PENDING(jeff) - I18N
    l = new JLabel(enterFileNameLabelText);
    l.setDisplayedMnemonic(enterFileNameLabelMnemonic);
    align(l);
    interior.add(l);

    filenameTextField =
        new JTextField() {
          public Dimension getMaximumSize() {
            Dimension d = super.getMaximumSize();
            d.height = getPreferredSize().height;
            return d;
          }
        };
    l.setLabelFor(filenameTextField);
    filenameTextField.addActionListener(getApproveSelectionAction());
    align(filenameTextField);
    filenameTextField.setAlignmentX(JComponent.LEFT_ALIGNMENT);
    interior.add(filenameTextField);

    bottomPanel = getBottomPanel();
    bottomPanel.add(new JSeparator(), BorderLayout.NORTH);

    // Add buttons
    JPanel buttonPanel = new JPanel();
    align(buttonPanel);
    buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.LINE_AXIS));
    buttonPanel.add(Box.createGlue());

    approveButton =
        new JButton(getApproveButtonText(fc)) {
          public Dimension getMaximumSize() {
            return new Dimension(MAX_SIZE.width, this.getPreferredSize().height);
          }
        };
    approveButton.setMnemonic(getApproveButtonMnemonic(fc));
    approveButton.setToolTipText(getApproveButtonToolTipText(fc));
    align(approveButton);
    approveButton.setMargin(buttonMargin);
    approveButton.addActionListener(getApproveSelectionAction());
    buttonPanel.add(approveButton);
    buttonPanel.add(Box.createGlue());

    JButton updateButton =
        new JButton(updateButtonText) {
          public Dimension getMaximumSize() {
            return new Dimension(MAX_SIZE.width, this.getPreferredSize().height);
          }
        };
    updateButton.setMnemonic(updateButtonMnemonic);
    updateButton.setToolTipText(updateButtonToolTipText);
    align(updateButton);
    updateButton.setMargin(buttonMargin);
    updateButton.addActionListener(getUpdateAction());
    buttonPanel.add(updateButton);
    buttonPanel.add(Box.createGlue());

    JButton cancelButton =
        new JButton(cancelButtonText) {
          public Dimension getMaximumSize() {
            return new Dimension(MAX_SIZE.width, this.getPreferredSize().height);
          }
        };
    cancelButton.setMnemonic(cancelButtonMnemonic);
    cancelButton.setToolTipText(cancelButtonToolTipText);
    align(cancelButton);
    cancelButton.setMargin(buttonMargin);
    cancelButton.addActionListener(getCancelSelectionAction());
    buttonPanel.add(cancelButton);
    buttonPanel.add(Box.createGlue());

    JButton helpButton =
        new JButton(helpButtonText) {
          public Dimension getMaximumSize() {
            return new Dimension(MAX_SIZE.width, this.getPreferredSize().height);
          }
        };
    helpButton.setMnemonic(helpButtonMnemonic);
    helpButton.setToolTipText(helpButtonToolTipText);
    align(helpButton);
    helpButton.setMargin(buttonMargin);
    helpButton.setEnabled(false);
    buttonPanel.add(helpButton);
    buttonPanel.add(Box.createGlue());

    bottomPanel.add(buttonPanel, BorderLayout.SOUTH);
    if (fc.getControlButtonsAreShown()) {
      fc.add(bottomPanel, BorderLayout.SOUTH);
    }
  }