Java example source code file (SynthFileChooserUIImpl.java)

This example Java source code file (SynthFileChooserUIImpl.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

action, alignedlabel, awt, component, dimension, directorycomboboxmodel, event, file, filechooser, filefilter, filtercomboboxmodel, gui, jcombobox, jcomponent, jfilechooser, jlabel, jpanel, security, string, swing

The SynthFileChooserUIImpl.java Java example source code

/*
 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package sun.swing.plaf.synth;

import java.awt.*;
import java.awt.event.*;
import java.beans.*;
import java.io.*;
import java.util.*;
import java.security.AccessController;
import java.security.PrivilegedAction;

import javax.swing.*;
import javax.swing.event.*;
import javax.swing.filechooser.*;
import javax.swing.filechooser.FileFilter;
import javax.swing.plaf.basic.*;
import javax.swing.plaf.synth.*;
import javax.swing.plaf.ActionMapUIResource;

import sun.awt.shell.ShellFolder;
import sun.swing.*;

/**
 * Synth FileChooserUI implementation.
 * <p>
 * Note that the classes in the com.sun.java.swing.plaf.synth
 * package are not
 * part of the core Java APIs. They are a part of Sun's JDK and JRE
 * distributions. Although other licensees may choose to distribute
 * these classes, developers cannot depend on their availability in
 * non-Sun implementations. Additionally this API may change in
 * incompatible ways between releases. While this class is public, it
 * shoud be considered an implementation detail, and subject to change.
 *
 * @author Leif Samuelsson
 * @author Jeff Dinkins
 */
public class SynthFileChooserUIImpl extends SynthFileChooserUI {
    private JLabel lookInLabel;
    private JComboBox<File> directoryComboBox;
    private DirectoryComboBoxModel directoryComboBoxModel;
    private Action directoryComboBoxAction = new DirectoryComboBoxAction();

    private FilterComboBoxModel filterComboBoxModel;

    private JTextField fileNameTextField;

    private FilePane filePane;
    private JToggleButton listViewButton;
    private JToggleButton detailsViewButton;

    private boolean readOnly;

    private JPanel buttonPanel;
    private JPanel bottomPanel;

    private JComboBox<FileFilter> filterComboBox;

    private static final Dimension hstrut5 = new Dimension(5, 1);

    private static final Insets shrinkwrap = new Insets(0,0,0,0);

    // Preferred and Minimum sizes for the dialog box
    private static Dimension LIST_PREF_SIZE = new Dimension(405, 135);

    // Labels, mnemonics, and tooltips (oh my!)
    private int    lookInLabelMnemonic = 0;
    private String lookInLabelText = null;
    private String saveInLabelText = null;

    private int    fileNameLabelMnemonic = 0;
    private String fileNameLabelText = null;
    private int    folderNameLabelMnemonic = 0;
    private String folderNameLabelText = null;

    private int    filesOfTypeLabelMnemonic = 0;
    private String filesOfTypeLabelText = null;

    private String upFolderToolTipText = null;
    private String upFolderAccessibleName = null;

    private String homeFolderToolTipText = null;
    private String homeFolderAccessibleName = null;

    private String newFolderToolTipText = null;
    private String newFolderAccessibleName = null;

    private String listViewButtonToolTipText = null;
    private String listViewButtonAccessibleName = null;

    private String detailsViewButtonToolTipText = null;
    private String detailsViewButtonAccessibleName = null;

    private AlignedLabel fileNameLabel;
    private final PropertyChangeListener modeListener = new PropertyChangeListener() {
        public void propertyChange(PropertyChangeEvent event) {
            if (fileNameLabel != null) {
                populateFileNameLabel();
            }
        }
    };

    private void populateFileNameLabel() {
        if (getFileChooser().getFileSelectionMode() == JFileChooser.DIRECTORIES_ONLY) {
            fileNameLabel.setText(folderNameLabelText);
            fileNameLabel.setDisplayedMnemonic(folderNameLabelMnemonic);
        } else {
            fileNameLabel.setText(fileNameLabelText);
            fileNameLabel.setDisplayedMnemonic(fileNameLabelMnemonic);
        }
    }

    public SynthFileChooserUIImpl(JFileChooser b) {
        super(b);
    }


    private class SynthFileChooserUIAccessor implements FilePane.FileChooserUIAccessor {
        public JFileChooser getFileChooser() {
            return SynthFileChooserUIImpl.this.getFileChooser();
        }

        public BasicDirectoryModel getModel() {
            return SynthFileChooserUIImpl.this.getModel();
        }

        public JPanel createList() {
            return null;
        }

        public JPanel createDetailsView() {
            return null;
        }

        public boolean isDirectorySelected() {
            return SynthFileChooserUIImpl.this.isDirectorySelected();
        }

        public File getDirectory() {
            return SynthFileChooserUIImpl.this.getDirectory();
        }

        public Action getChangeToParentDirectoryAction() {
            return SynthFileChooserUIImpl.this.getChangeToParentDirectoryAction();
        }

        public Action getApproveSelectionAction() {
            return SynthFileChooserUIImpl.this.getApproveSelectionAction();
        }

        public Action getNewFolderAction() {
            return SynthFileChooserUIImpl.this.getNewFolderAction();
        }

        public MouseListener createDoubleClickListener(JList list) {
            return SynthFileChooserUIImpl.this.createDoubleClickListener(getFileChooser(),
                                                                     list);
        }

        public ListSelectionListener createListSelectionListener() {
            return SynthFileChooserUIImpl.this.createListSelectionListener(getFileChooser());
        }
    }

    protected void installDefaults(JFileChooser fc) {
        super.installDefaults(fc);
        readOnly = UIManager.getBoolean("FileChooser.readOnly");
    }

    public void installComponents(JFileChooser fc) {
        super.installComponents(fc);

        SynthContext context = getContext(fc, ENABLED);

        fc.setLayout(new BorderLayout(0, 11));

        // ********************************* //
        // **** Construct the top panel **** //
        // ********************************* //

        // Directory manipulation buttons
        JPanel topPanel = new JPanel(new BorderLayout(11, 0));
    JPanel topButtonPanel = new JPanel();
    topButtonPanel.setLayout(new BoxLayout(topButtonPanel, BoxLayout.LINE_AXIS));
    topPanel.add(topButtonPanel, BorderLayout.AFTER_LINE_ENDS);

        // Add the top panel to the fileChooser
        fc.add(topPanel, BorderLayout.NORTH);

        // ComboBox Label
        lookInLabel = new JLabel(lookInLabelText);
        lookInLabel.setDisplayedMnemonic(lookInLabelMnemonic);
        topPanel.add(lookInLabel, BorderLayout.BEFORE_LINE_BEGINS);

        // CurrentDir ComboBox
        directoryComboBox = new JComboBox<File>();
        directoryComboBox.getAccessibleContext().setAccessibleDescription(lookInLabelText);
        directoryComboBox.putClientProperty( "JComboBox.isTableCellEditor", Boolean.TRUE );
        lookInLabel.setLabelFor(directoryComboBox);
        directoryComboBoxModel = createDirectoryComboBoxModel(fc);
        directoryComboBox.setModel(directoryComboBoxModel);
        directoryComboBox.addActionListener(directoryComboBoxAction);
        directoryComboBox.setRenderer(createDirectoryComboBoxRenderer(fc));
        directoryComboBox.setAlignmentX(JComponent.LEFT_ALIGNMENT);
        directoryComboBox.setAlignmentY(JComponent.TOP_ALIGNMENT);
        directoryComboBox.setMaximumRowCount(8);
        topPanel.add(directoryComboBox, BorderLayout.CENTER);

        filePane = new FilePane(new SynthFileChooserUIAccessor());
        fc.addPropertyChangeListener(filePane);

        // Add 'Go Up' to context menu, plus 'Go Home' if on Unix
        JPopupMenu contextMenu = filePane.getComponentPopupMenu();
        if (contextMenu != null) {
            contextMenu.insert(getChangeToParentDirectoryAction(), 0);
            if (File.separatorChar == '/') {
                contextMenu.insert(getGoHomeAction(), 1);
            }
        }

    FileSystemView fsv = fc.getFileSystemView();

    // Up Button
    JButton upFolderButton = new JButton(getChangeToParentDirectoryAction());
    upFolderButton.setText(null);
    upFolderButton.setIcon(upFolderIcon);
    upFolderButton.setToolTipText(upFolderToolTipText);
    upFolderButton.getAccessibleContext().setAccessibleName(upFolderAccessibleName);
    upFolderButton.setAlignmentX(JComponent.LEFT_ALIGNMENT);
    upFolderButton.setAlignmentY(JComponent.CENTER_ALIGNMENT);
    upFolderButton.setMargin(shrinkwrap);

    topButtonPanel.add(upFolderButton);
    topButtonPanel.add(Box.createRigidArea(hstrut5));

    // Home Button
    File homeDir = fsv.getHomeDirectory();
    String toolTipText = homeFolderToolTipText;
    if (fsv.isRoot(homeDir)) {
        toolTipText = getFileView(fc).getName(homeDir); // Probably "Desktop".
    }

    JButton b = new JButton(homeFolderIcon);
    b.setToolTipText(toolTipText);
    b.getAccessibleContext().setAccessibleName(homeFolderAccessibleName);
    b.setAlignmentX(JComponent.LEFT_ALIGNMENT);
    b.setAlignmentY(JComponent.CENTER_ALIGNMENT);
    b.setMargin(shrinkwrap);

    b.addActionListener(getGoHomeAction());
    topButtonPanel.add(b);
    topButtonPanel.add(Box.createRigidArea(hstrut5));

    // New Directory Button
    if (!readOnly) {
        b = new JButton(filePane.getNewFolderAction());
        b.setText(null);
        b.setIcon(newFolderIcon);
        b.setToolTipText(newFolderToolTipText);
        b.getAccessibleContext().setAccessibleName(newFolderAccessibleName);
        b.setAlignmentX(JComponent.LEFT_ALIGNMENT);
        b.setAlignmentY(JComponent.CENTER_ALIGNMENT);
        b.setMargin(shrinkwrap);
        topButtonPanel.add(b);
        topButtonPanel.add(Box.createRigidArea(hstrut5));
    }

    // View button group
    ButtonGroup viewButtonGroup = new ButtonGroup();

    // List Button
    listViewButton = new JToggleButton(listViewIcon);
    listViewButton.setToolTipText(listViewButtonToolTipText);
    listViewButton.getAccessibleContext().setAccessibleName(listViewButtonAccessibleName);
    listViewButton.setSelected(true);
    listViewButton.setAlignmentX(JComponent.LEFT_ALIGNMENT);
    listViewButton.setAlignmentY(JComponent.CENTER_ALIGNMENT);
    listViewButton.setMargin(shrinkwrap);
    listViewButton.addActionListener(filePane.getViewTypeAction(FilePane.VIEWTYPE_LIST));
    topButtonPanel.add(listViewButton);
    viewButtonGroup.add(listViewButton);

    // Details Button
    detailsViewButton = new JToggleButton(detailsViewIcon);
    detailsViewButton.setToolTipText(detailsViewButtonToolTipText);
    detailsViewButton.getAccessibleContext().setAccessibleName(detailsViewButtonAccessibleName);
    detailsViewButton.setAlignmentX(JComponent.LEFT_ALIGNMENT);
    detailsViewButton.setAlignmentY(JComponent.CENTER_ALIGNMENT);
    detailsViewButton.setMargin(shrinkwrap);
    detailsViewButton.addActionListener(filePane.getViewTypeAction(FilePane.VIEWTYPE_DETAILS));
    topButtonPanel.add(detailsViewButton);
    viewButtonGroup.add(detailsViewButton);

    filePane.addPropertyChangeListener(new PropertyChangeListener() {
        public void propertyChange(PropertyChangeEvent e) {
            if ("viewType".equals(e.getPropertyName())) {
                int viewType = filePane.getViewType();
                switch (viewType) {
                    case FilePane.VIEWTYPE_LIST:
                        listViewButton.setSelected(true);
                        break;
                    case FilePane.VIEWTYPE_DETAILS:
                        detailsViewButton.setSelected(true);
                        break;
                }
            }
        }
    });

        // ************************************** //
        // ******* Add the directory pane ******* //
        // ************************************** //
        fc.add(getAccessoryPanel(), BorderLayout.AFTER_LINE_ENDS);
        JComponent accessory = fc.getAccessory();
        if (accessory != null) {
            getAccessoryPanel().add(accessory);
        }
        filePane.setPreferredSize(LIST_PREF_SIZE);
        fc.add(filePane, BorderLayout.CENTER);


        // ********************************** //
        // **** Construct the bottom panel ** //
        // ********************************** //
        bottomPanel = new JPanel();
        bottomPanel.setLayout(new BoxLayout(bottomPanel, BoxLayout.Y_AXIS));
        fc.add(bottomPanel, BorderLayout.SOUTH);

        // FileName label and textfield
        JPanel fileNamePanel = new JPanel();
        fileNamePanel.setLayout(new BoxLayout(fileNamePanel, BoxLayout.LINE_AXIS));
        bottomPanel.add(fileNamePanel);
        bottomPanel.add(Box.createRigidArea(new Dimension(1, 5)));

        fileNameLabel = new AlignedLabel();
        populateFileNameLabel();
        fileNamePanel.add(fileNameLabel);

        fileNameTextField = new JTextField(35) {
            public Dimension getMaximumSize() {
                return new Dimension(Short.MAX_VALUE, super.getPreferredSize().height);
            }
        };
        fileNamePanel.add(fileNameTextField);
        fileNameLabel.setLabelFor(fileNameTextField);
        fileNameTextField.addFocusListener(
            new FocusAdapter() {
                public void focusGained(FocusEvent e) {
                    if (!getFileChooser().isMultiSelectionEnabled()) {
                        filePane.clearSelection();
                    }
                }
            }
        );
        if (fc.isMultiSelectionEnabled()) {
            setFileName(fileNameString(fc.getSelectedFiles()));
        } else {
            setFileName(fileNameString(fc.getSelectedFile()));
        }


        // Filetype label and combobox
        JPanel filesOfTypePanel = new JPanel();
        filesOfTypePanel.setLayout(new BoxLayout(filesOfTypePanel, BoxLayout.LINE_AXIS));
        bottomPanel.add(filesOfTypePanel);

        AlignedLabel filesOfTypeLabel = new AlignedLabel(filesOfTypeLabelText);
        filesOfTypeLabel.setDisplayedMnemonic(filesOfTypeLabelMnemonic);
        filesOfTypePanel.add(filesOfTypeLabel);

        filterComboBoxModel = createFilterComboBoxModel();
        fc.addPropertyChangeListener(filterComboBoxModel);
        filterComboBox = new JComboBox<FileFilter>(filterComboBoxModel);
        filterComboBox.getAccessibleContext().setAccessibleDescription(filesOfTypeLabelText);
        filesOfTypeLabel.setLabelFor(filterComboBox);
        filterComboBox.setRenderer(createFilterComboBoxRenderer());
        filesOfTypePanel.add(filterComboBox);


        // buttons
        buttonPanel = new JPanel();
        buttonPanel.setLayout(new ButtonAreaLayout());

        buttonPanel.add(getApproveButton(fc));
        buttonPanel.add(getCancelButton(fc));

        if (fc.getControlButtonsAreShown()) {
            addControlButtons();
        }

        groupLabels(new AlignedLabel[] { fileNameLabel, filesOfTypeLabel });
    }

    protected void installListeners(JFileChooser fc) {
        super.installListeners(fc);
        fc.addPropertyChangeListener(JFileChooser.FILE_SELECTION_MODE_CHANGED_PROPERTY, modeListener);
    }

    protected void uninstallListeners(JFileChooser fc) {
        fc.removePropertyChangeListener(JFileChooser.FILE_SELECTION_MODE_CHANGED_PROPERTY, modeListener);
        super.uninstallListeners(fc);
    }

    private String fileNameString(File file) {
        if (file == null) {
            return null;
        } else {
            JFileChooser fc = getFileChooser();
            if (fc.isDirectorySelectionEnabled() && !fc.isFileSelectionEnabled()) {
                return file.getPath();
            } else {
                return file.getName();
            }
        }
    }

    private String fileNameString(File[] files) {
        StringBuffer buf = new StringBuffer();
        for (int i = 0; files != null && i < files.length; i++) {
            if (i > 0) {
                buf.append(" ");
            }
            if (files.length > 1) {
                buf.append("\"");
            }
            buf.append(fileNameString(files[i]));
            if (files.length > 1) {
                buf.append("\"");
            }
        }
        return buf.toString();
    }

    public void uninstallUI(JComponent c) {
        // Remove listeners
        c.removePropertyChangeListener(filterComboBoxModel);
        c.removePropertyChangeListener(filePane);

        if (filePane != null) {
            filePane.uninstallUI();
            filePane = null;
        }

        super.uninstallUI(c);
    }

    protected void installStrings(JFileChooser fc) {
        super.installStrings(fc);

        Locale l = fc.getLocale();

        lookInLabelMnemonic = getMnemonic("FileChooser.lookInLabelMnemonic", l);
        lookInLabelText = UIManager.getString("FileChooser.lookInLabelText", l);
        saveInLabelText = UIManager.getString("FileChooser.saveInLabelText", l);

        fileNameLabelMnemonic = getMnemonic("FileChooser.fileNameLabelMnemonic", l);
        fileNameLabelText = UIManager.getString("FileChooser.fileNameLabelText", l);
        folderNameLabelMnemonic = getMnemonic("FileChooser.folderNameLabelMnemonic", l);
        folderNameLabelText = UIManager.getString("FileChooser.folderNameLabelText", l);

        filesOfTypeLabelMnemonic = getMnemonic("FileChooser.filesOfTypeLabelMnemonic", l);
        filesOfTypeLabelText = UIManager.getString("FileChooser.filesOfTypeLabelText", l);

    upFolderToolTipText =  UIManager.getString("FileChooser.upFolderToolTipText",l);
    upFolderAccessibleName = UIManager.getString("FileChooser.upFolderAccessibleName",l);

    homeFolderToolTipText =  UIManager.getString("FileChooser.homeFolderToolTipText",l);
    homeFolderAccessibleName = UIManager.getString("FileChooser.homeFolderAccessibleName",l);

    newFolderToolTipText = UIManager.getString("FileChooser.newFolderToolTipText",l);
    newFolderAccessibleName = UIManager.getString("FileChooser.newFolderAccessibleName",l);

    listViewButtonToolTipText = UIManager.getString("FileChooser.listViewButtonToolTipText",l);
    listViewButtonAccessibleName = UIManager.getString("FileChooser.listViewButtonAccessibleName",l);

    detailsViewButtonToolTipText = UIManager.getString("FileChooser.detailsViewButtonToolTipText",l);
    detailsViewButtonAccessibleName = UIManager.getString("FileChooser.detailsViewButtonAccessibleName",l);
    }

    private int getMnemonic(String key, Locale l) {
        return SwingUtilities2.getUIDefaultsInt(key, l);
    }


    public String getFileName() {
        if (fileNameTextField != null) {
            return fileNameTextField.getText();
        } else {
            return null;
        }
    }

    public void setFileName(String fileName) {
        if (fileNameTextField != null) {
            fileNameTextField.setText(fileName);
        }
    }

    @Override public void rescanCurrentDirectory(JFileChooser fc) {
        filePane.rescanCurrentDirectory();
    }

    protected void doSelectedFileChanged(PropertyChangeEvent e) {
        super.doSelectedFileChanged(e);

        File f = (File) e.getNewValue();
        JFileChooser fc = getFileChooser();
        if (f != null
            && ((fc.isFileSelectionEnabled() && !f.isDirectory())
                || (f.isDirectory() && fc.isDirectorySelectionEnabled()))) {

            setFileName(fileNameString(f));
        }
    }

    protected void doSelectedFilesChanged(PropertyChangeEvent e) {
        super.doSelectedFilesChanged(e);

        File[] files = (File[]) e.getNewValue();
        JFileChooser fc = getFileChooser();
        if (files != null
            && files.length > 0
            && (files.length > 1 || fc.isDirectorySelectionEnabled() || !files[0].isDirectory())) {
            setFileName(fileNameString(files));
        }
    }

    protected void doDirectoryChanged(PropertyChangeEvent e) {
        super.doDirectoryChanged(e);

        JFileChooser fc = getFileChooser();
        FileSystemView fsv = fc.getFileSystemView();
        File currentDirectory = fc.getCurrentDirectory();

        if (!readOnly && currentDirectory != null) {
            getNewFolderAction().setEnabled(filePane.canWrite(currentDirectory));
        }

        if (currentDirectory != null) {
            JComponent cb = getDirectoryComboBox();
            if (cb instanceof JComboBox) {
                ComboBoxModel model = ((JComboBox)cb).getModel();
                if (model instanceof DirectoryComboBoxModel) {
                    ((DirectoryComboBoxModel)model).addItem(currentDirectory);
                }
            }

            if (fc.isDirectorySelectionEnabled() && !fc.isFileSelectionEnabled()) {
                if (fsv.isFileSystem(currentDirectory)) {
                    setFileName(currentDirectory.getPath());
                } else {
                    setFileName(null);
                }
            }
        }
    }


    protected void doFileSelectionModeChanged(PropertyChangeEvent e) {
        super.doFileSelectionModeChanged(e);

        JFileChooser fc = getFileChooser();
        File currentDirectory = fc.getCurrentDirectory();
        if (currentDirectory != null
            && fc.isDirectorySelectionEnabled()
            && !fc.isFileSelectionEnabled()
            && fc.getFileSystemView().isFileSystem(currentDirectory)) {

            setFileName(currentDirectory.getPath());
        } else {
            setFileName(null);
        }
    }

    protected void doAccessoryChanged(PropertyChangeEvent e) {
        if (getAccessoryPanel() != null) {
            if (e.getOldValue() != null) {
                getAccessoryPanel().remove((JComponent)e.getOldValue());
            }
            JComponent accessory = (JComponent)e.getNewValue();
            if (accessory != null) {
                getAccessoryPanel().add(accessory, BorderLayout.CENTER);
            }
        }
    }

    protected void doControlButtonsChanged(PropertyChangeEvent e) {
        super.doControlButtonsChanged(e);

        if (getFileChooser().getControlButtonsAreShown()) {
            addControlButtons();
        } else {
            removeControlButtons();
        }
    }

    protected void addControlButtons() {
        if (bottomPanel != null) {
            bottomPanel.add(buttonPanel);
        }
    }

    protected void removeControlButtons() {
        if (bottomPanel != null) {
            bottomPanel.remove(buttonPanel);
        }
    }




    // *******************************************************
    // ************ FileChooser UI PLAF methods **************
    // *******************************************************

    protected ActionMap createActionMap() {
        ActionMap map = new ActionMapUIResource();
        // add standard actions
        FilePane.addActionsToMap(map, filePane.getActions());
        // add synth only actions
        map.put("fileNameCompletion", getFileNameCompletionAction());
        return map;
    }

    // *****************************
    // ***** Directory Actions *****
    // *****************************

    protected JComponent getDirectoryComboBox() {
        return directoryComboBox;
    }

    protected Action getDirectoryComboBoxAction() {
        return directoryComboBoxAction;
    }

    protected DirectoryComboBoxRenderer createDirectoryComboBoxRenderer(JFileChooser fc) {
        return new DirectoryComboBoxRenderer(directoryComboBox.getRenderer());
    }

    //
    // Renderer for DirectoryComboBox
    //
    // Synth has some odd behavior with regards to renderers. Renderers are styled
    // in a specific manner by the SynthComboBoxUI. If we extend DefaultListCellRenderer
    // here, then we get none of those benefits or behaviors, leading to poor
    // looking combo boxes.
    // So what we do here is delegate most jobs to the "real" or original renderer,
    // and simply monkey with the icon and text of the renderer.
    private class DirectoryComboBoxRenderer implements ListCellRenderer<File> {
        private ListCellRenderer<? super File> delegate;
        IndentIcon ii = new IndentIcon();

        private DirectoryComboBoxRenderer(ListCellRenderer<? super File> delegate) {
            this.delegate = delegate;
        }

        @Override
        public Component getListCellRendererComponent(JList<? extends File> list, File value, int index, boolean isSelected, boolean cellHasFocus) {
            Component c = delegate.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);

            assert c instanceof JLabel;
            JLabel label = (JLabel)c;
            if (value == null) {
                label.setText("");
                return label;
            }
            label.setText(getFileChooser().getName(value));
            Icon icon = getFileChooser().getIcon(value);
            ii.icon = icon;
            ii.depth = directoryComboBoxModel.getDepth(index);
            label.setIcon(ii);

            return label;
        }
    }

    final static int space = 10;
    class IndentIcon implements Icon {

        Icon icon = null;
        int depth = 0;

        public void paintIcon(Component c, Graphics g, int x, int y) {
            if (icon != null) {
                if (c.getComponentOrientation().isLeftToRight()) {
                    icon.paintIcon(c, g, x+depth*space, y);
                } else {
                    icon.paintIcon(c, g, x, y);
                }
            }
        }

        public int getIconWidth() {
            return ((icon != null) ? icon.getIconWidth() : 0) + depth*space;
        }

        public int getIconHeight() {
            return (icon != null) ? icon.getIconHeight() : 0;
        }

    }

    //
    // DataModel for DirectoryComboxbox
    //
    protected DirectoryComboBoxModel createDirectoryComboBoxModel(JFileChooser fc) {
        return new DirectoryComboBoxModel();
    }

    /**
     * Data model for a type-face selection combo-box.
     */
    protected class DirectoryComboBoxModel extends AbstractListModel<File> implements ComboBoxModel {
        Vector<File> directories = new Vector();
        int[] depths = null;
        File selectedDirectory = null;
        JFileChooser chooser = getFileChooser();
        FileSystemView fsv = chooser.getFileSystemView();

        public DirectoryComboBoxModel() {
            // Add the current directory to the model, and make it the
            // selectedDirectory
            File dir = getFileChooser().getCurrentDirectory();
            if (dir != null) {
                addItem(dir);
            }
        }

        /**
         * Adds the directory to the model and sets it to be selected,
         * additionally clears out the previous selected directory and
         * the paths leading up to it, if any.
         */
        public void addItem(File directory) {

            if (directory == null) {
                return;
            }

            boolean useShellFolder = FilePane.usesShellFolder(chooser);

            int oldSize = directories.size();
            directories.clear();
            if (oldSize > 0) {
                fireIntervalRemoved(this, 0, oldSize);
            }

            File[] baseFolders;
            if (useShellFolder) {
                baseFolders = AccessController.doPrivileged(new PrivilegedAction<File[]>() {
                    public File[] run() {
                        return (File[]) ShellFolder.get("fileChooserComboBoxFolders");
                    }
                });
            } else {
                baseFolders = fsv.getRoots();
            }
            directories.addAll(Arrays.asList(baseFolders));

            // Get the canonical (full) path. This has the side
            // benefit of removing extraneous chars from the path,
            // for example /foo/bar/ becomes /foo/bar
            File canonical;
            try {
                canonical = ShellFolder.getNormalizedFile(directory);
            } catch (IOException e) {
                // Maybe drive is not ready. Can't abort here.
                canonical = directory;
            }

            // create File instances of each directory leading up to the top
            try {
                File sf = useShellFolder ? ShellFolder.getShellFolder(canonical)
                                         : canonical;
                File f = sf;
                Vector<File> path = new Vector(10);
                do {
                    path.addElement(f);
                } while ((f = f.getParentFile()) != null);

                int pathCount = path.size();
                // Insert chain at appropriate place in vector
                for (int i = 0; i < pathCount; i++) {
                    f = path.get(i);
                    if (directories.contains(f)) {
                        int topIndex = directories.indexOf(f);
                        for (int j = i-1; j >= 0; j--) {
                            directories.insertElementAt(path.get(j), topIndex+i-j);
                        }
                        break;
                    }
                }
                calculateDepths();
                setSelectedItem(sf);
            } catch (FileNotFoundException ex) {
                calculateDepths();
            }
        }

        private void calculateDepths() {
            depths = new int[directories.size()];
            for (int i = 0; i < depths.length; i++) {
                File dir = directories.get(i);
                File parent = dir.getParentFile();
                depths[i] = 0;
                if (parent != null) {
                    for (int j = i-1; j >= 0; j--) {
                        if (parent.equals(directories.get(j))) {
                            depths[i] = depths[j] + 1;
                            break;
                        }
                    }
                }
            }
        }

        public int getDepth(int i) {
            return (depths != null && i >= 0 && i < depths.length) ? depths[i] : 0;
        }

        public void setSelectedItem(Object selectedDirectory) {
            this.selectedDirectory = (File)selectedDirectory;
            fireContentsChanged(this, -1, -1);
        }

        public Object getSelectedItem() {
            return selectedDirectory;
        }

        public int getSize() {
            return directories.size();
        }

        public File getElementAt(int index) {
            return directories.elementAt(index);
        }
    }

    /**
     * Acts when DirectoryComboBox has changed the selected item.
     */
    protected class DirectoryComboBoxAction extends AbstractAction {
        protected DirectoryComboBoxAction() {
            super("DirectoryComboBoxAction");
        }

        public void actionPerformed(ActionEvent e) {
            directoryComboBox.hidePopup();
            JComponent cb = getDirectoryComboBox();
            if (cb instanceof JComboBox) {
                File f = (File)((JComboBox)cb).getSelectedItem();
                getFileChooser().setCurrentDirectory(f);
            }
        }
    }

    //
    // Renderer for Types ComboBox
    //
    protected FilterComboBoxRenderer createFilterComboBoxRenderer() {
        return new FilterComboBoxRenderer(filterComboBox.getRenderer());
    }

    /**
     * Render different type sizes and styles.
     */
    public class FilterComboBoxRenderer implements ListCellRenderer<FileFilter> {
        private ListCellRenderer<? super FileFilter> delegate;
        private FilterComboBoxRenderer(ListCellRenderer<? super FileFilter> delegate) {
            this.delegate = delegate;
        }

        public Component getListCellRendererComponent(JList<? extends FileFilter> list, FileFilter value, int index,
                                                      boolean isSelected, boolean cellHasFocus) {
            Component c = delegate.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);

            String text = null;
            if (value != null) {
                text = value.getDescription();
            }

            //this should always be true, since SynthComboBoxUI's SynthComboBoxRenderer
            //extends JLabel
            assert c instanceof JLabel;
            if (text != null) {
                ((JLabel)c).setText(text);
            }
            return c;
        }
    }

    //
    // DataModel for Types Comboxbox
    //
    protected FilterComboBoxModel createFilterComboBoxModel() {
        return new FilterComboBoxModel();
    }

    /**
     * Data model for a type-face selection combo-box.
     */
    protected class FilterComboBoxModel extends AbstractListModel<FileFilter> implements ComboBoxModel,
            PropertyChangeListener {
        protected FileFilter[] filters;
        protected FilterComboBoxModel() {
            super();
            filters = getFileChooser().getChoosableFileFilters();
        }

        public void propertyChange(PropertyChangeEvent e) {
            String prop = e.getPropertyName();
            if(prop == JFileChooser.CHOOSABLE_FILE_FILTER_CHANGED_PROPERTY) {
                filters = (FileFilter[]) e.getNewValue();
                fireContentsChanged(this, -1, -1);
            } else if (prop == JFileChooser.FILE_FILTER_CHANGED_PROPERTY) {
                fireContentsChanged(this, -1, -1);
            }
        }

        public void setSelectedItem(Object filter) {
            if(filter != null) {
                getFileChooser().setFileFilter((FileFilter) filter);
                fireContentsChanged(this, -1, -1);
            }
        }

        public Object getSelectedItem() {
            // Ensure that the current filter is in the list.
            // NOTE: we shouldnt' have to do this, since JFileChooser adds
            // the filter to the choosable filters list when the filter
            // is set. Lets be paranoid just in case someone overrides
            // setFileFilter in JFileChooser.
            FileFilter currentFilter = getFileChooser().getFileFilter();
            boolean found = false;
            if(currentFilter != null) {
                for (FileFilter filter : filters) {
                    if (filter == currentFilter) {
                        found = true;
                    }
                }
                if(found == false) {
                    getFileChooser().addChoosableFileFilter(currentFilter);
                }
            }
            return getFileChooser().getFileFilter();
        }

        public int getSize() {
            if(filters != null) {
                return filters.length;
            } else {
                return 0;
            }
        }

        public FileFilter getElementAt(int index) {
            if(index > getSize() - 1) {
                // This shouldn't happen. Try to recover gracefully.
                return getFileChooser().getFileFilter();
            }
            if(filters != null) {
                return filters[index];
            } else {
                return null;
            }
        }
    }



    /**
     * <code>ButtonAreaLayout behaves in a similar manner to
     * <code>FlowLayout. It lays out all components from left to
     * right, flushed right. The widths of all components will be set
     * to the largest preferred size width.
     */
    private static class ButtonAreaLayout implements LayoutManager {
        private int hGap = 5;
        private int topMargin = 17;

        public void addLayoutComponent(String string, Component comp) {
        }

        public void layoutContainer(Container container) {
            Component[] children = container.getComponents();

            if (children != null && children.length > 0) {
                int         numChildren = children.length;
                Dimension[] sizes = new Dimension[numChildren];
                Insets      insets = container.getInsets();
                int         yLocation = insets.top + topMargin;
                int         maxWidth = 0;

                for (int counter = 0; counter < numChildren; counter++) {
                    sizes[counter] = children[counter].getPreferredSize();
                    maxWidth = Math.max(maxWidth, sizes[counter].width);
                }
                int xLocation, xOffset;
                if (container.getComponentOrientation().isLeftToRight()) {
                    xLocation = container.getSize().width - insets.left - maxWidth;
                    xOffset = hGap + maxWidth;
                } else {
                    xLocation = insets.left;
                    xOffset = -(hGap + maxWidth);
                }
                for (int counter = numChildren - 1; counter >= 0; counter--) {
                    children[counter].setBounds(xLocation, yLocation,
                                                maxWidth, sizes[counter].height);
                    xLocation -= xOffset;
                }
            }
        }

        public Dimension minimumLayoutSize(Container c) {
            if (c != null) {
                Component[] children = c.getComponents();

                if (children != null && children.length > 0) {
                    int       numChildren = children.length;
                    int       height = 0;
                    Insets    cInsets = c.getInsets();
                    int       extraHeight = topMargin + cInsets.top + cInsets.bottom;
                    int       extraWidth = cInsets.left + cInsets.right;
                    int       maxWidth = 0;

                    for (int counter = 0; counter < numChildren; counter++) {
                        Dimension aSize = children[counter].getPreferredSize();
                        height = Math.max(height, aSize.height);
                        maxWidth = Math.max(maxWidth, aSize.width);
                    }
                    return new Dimension(extraWidth + numChildren * maxWidth +
                                         (numChildren - 1) * hGap,
                                         extraHeight + height);
                }
            }
            return new Dimension(0, 0);
        }

        public Dimension preferredLayoutSize(Container c) {
            return minimumLayoutSize(c);
        }

        public void removeLayoutComponent(Component c) { }
    }

    private static void groupLabels(AlignedLabel[] group) {
        for (int i = 0; i < group.length; i++) {
            group[i].group = group;
        }
    }

    private class AlignedLabel extends JLabel {
        private AlignedLabel[] group;
        private int maxWidth = 0;

        AlignedLabel() {
            super();
            setAlignmentX(JComponent.LEFT_ALIGNMENT);
        }

        AlignedLabel(String text) {
            super(text);
            setAlignmentX(JComponent.LEFT_ALIGNMENT);
        }

        public Dimension getPreferredSize() {
            Dimension d = super.getPreferredSize();
            // Align the width with all other labels in group.
            return new Dimension(getMaxWidth() + 11, d.height);
        }

        private int getMaxWidth() {
            if (maxWidth == 0 && group != null) {
                int max = 0;
                for (int i = 0; i < group.length; i++) {
                    max = Math.max(group[i].getSuperPreferredWidth(), max);
                }
                for (int i = 0; i < group.length; i++) {
                    group[i].maxWidth = max;
                }
            }
            return maxWidth;
        }

        private int getSuperPreferredWidth() {
            return super.getPreferredSize().width;
        }
    }
}