FileChooserDemo.java

/*
 * Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * This source code is provided to illustrate the usage of a given feature
 * or technique and has been deliberately simplified. Additional steps
 * required for a production-quality application, such as security checks,
 * input validation and proper error handling, might not be present in
 * this sample code.
 */



import java.lang.reflect.InvocationTargetException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.UIManager.LookAndFeelInfo;
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.List;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.ButtonGroup;
import javax.swing.DefaultComboBoxModel;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JDialog;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
import javax.swing.JToggleButton;
import javax.swing.LookAndFeel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.WindowConstants;
import javax.swing.filechooser.FileFilter;
import javax.swing.filechooser.FileNameExtensionFilter;
import javax.swing.filechooser.FileSystemView;
import java.util.ArrayList;
import javax.swing.plaf.FileChooserUI;
import javax.swing.plaf.basic.BasicFileChooserUI;
import java.io.File;
import static javax.swing.JFileChooser.*;


/**
 *
 * A demo which makes extensive use of the file chooser.
 *
 * @author Jeff Dinkins
 */
@SuppressWarnings("serial")
public class FileChooserDemo extends JPanel implements ActionListener {

    public static final String NIMBUS_LAF_NAME = "Nimbus";
    private static JFrame frame;
    private final List<SupportedLaF> supportedLaFs =
            new ArrayList<SupportedLaF>();
    private static SupportedLaF nimbusLaF;


    private static class SupportedLaF {

        private final String name;
        private final LookAndFeel laf;

        SupportedLaF(String name, LookAndFeel laf) {
            this.name = name;
            this.laf = laf;
        }

        @Override
        public String toString() {
            return name;
        }
    }
    private JButton showButton;
    private JCheckBox showAllFilesFilterCheckBox;
    private JCheckBox showImageFilesFilterCheckBox;
    private JCheckBox showFullDescriptionCheckBox;
    private JCheckBox useFileViewCheckBox;
    private JCheckBox useFileSystemViewCheckBox;
    private JCheckBox accessoryCheckBox;
    private JCheckBox setHiddenCheckBox;
    private JCheckBox useEmbedInWizardCheckBox;
    private JCheckBox useControlsCheckBox;
    private JCheckBox enableDragCheckBox;
    private JRadioButton singleSelectionRadioButton;
    private JRadioButton multiSelectionRadioButton;
    private JRadioButton openRadioButton;
    private JRadioButton saveRadioButton;
    private JRadioButton customButton;
    private JComboBox<SupportedLaF> lafComboBox;
    private JRadioButton justFilesRadioButton;
    private JRadioButton justDirectoriesRadioButton;
    private JRadioButton bothFilesAndDirectoriesRadioButton;
    private JTextField customField;
    private final ExampleFileView fileView;
    private final ExampleFileSystemView fileSystemView;
    private static final Dimension hpad10 = new Dimension(10, 1);
    private static final Dimension vpad20 = new Dimension(1, 20);
    private static final Dimension vpad7 = new Dimension(1, 7);
    private static final Dimension vpad4 = new Dimension(1, 4);
    private static final Insets insets = new Insets(5, 10, 0, 10);
    private final FilePreviewer previewer;
    private final JFileChooser chooser;

    @SuppressWarnings("LeakingThisInConstructor")
    public FileChooserDemo() {
        UIManager.LookAndFeelInfo[] installedLafs = UIManager.
                getInstalledLookAndFeels();
        for (UIManager.LookAndFeelInfo lafInfo : installedLafs) {
            try {
                Class<?> lnfClass = Class.forName(lafInfo.getClassName());
                LookAndFeel laf = (LookAndFeel) (lnfClass.getDeclaredConstructor().newInstance());
                if (laf.isSupportedLookAndFeel()) {
                    String name = lafInfo.getName();
                    SupportedLaF supportedLaF = new SupportedLaF(name, laf);
                    supportedLaFs.add(supportedLaF);
                    if (NIMBUS_LAF_NAME.equals(name)) {
                        nimbusLaF = supportedLaF;
                    }
                }
            } catch (Exception ignored) {
                // If ANYTHING weird happens, don't add this L&F
            }
        }

        setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));

        chooser = new JFileChooser();
        previewer = new FilePreviewer(chooser);

        // Create Custom FileView
        fileView = new ExampleFileView();
        fileView.putIcon("jpg", new ImageIcon(getClass().getResource(
                "/resources/images/jpgIcon.jpg")));
        fileView.putIcon("gif", new ImageIcon(getClass().getResource(
                "/resources/images/gifIcon.gif")));

        // Create Custom FileSystemView
        fileSystemView = new ExampleFileSystemView();

        // create a radio listener to listen to option changes
        OptionListener optionListener = new OptionListener();

        // Create options
        openRadioButton = new JRadioButton("Open");
        openRadioButton.setSelected(true);
        openRadioButton.addActionListener(optionListener);

        saveRadioButton = new JRadioButton("Save");
        saveRadioButton.addActionListener(optionListener);

        customButton = new JRadioButton("Custom");
        customButton.addActionListener(optionListener);

        customField = new JTextField(8) {

            @Override
            public Dimension getMaximumSize() {
                return new Dimension(getPreferredSize().width,
                        getPreferredSize().height);
            }
        };
        customField.setText("Doit");
        customField.setAlignmentY(JComponent.TOP_ALIGNMENT);
        customField.setEnabled(false);
        customField.addActionListener(optionListener);

        ButtonGroup group1 = new ButtonGroup();
        group1.add(openRadioButton);
        group1.add(saveRadioButton);
        group1.add(customButton);

        // filter buttons
        showAllFilesFilterCheckBox = new JCheckBox("Show \"All Files\" Filter");
        showAllFilesFilterCheckBox.addActionListener(optionListener);
        showAllFilesFilterCheckBox.setSelected(true);

        showImageFilesFilterCheckBox = new JCheckBox("Show JPG and GIF Filters");
        showImageFilesFilterCheckBox.addActionListener(optionListener);
        showImageFilesFilterCheckBox.setSelected(false);

        accessoryCheckBox = new JCheckBox("Show Preview");
        accessoryCheckBox.addActionListener(optionListener);
        accessoryCheckBox.setSelected(false);

        // more options
        setHiddenCheckBox = new JCheckBox("Show Hidden Files");
        setHiddenCheckBox.addActionListener(optionListener);

        showFullDescriptionCheckBox = new JCheckBox("With File Extensions");
        showFullDescriptionCheckBox.addActionListener(optionListener);
        showFullDescriptionCheckBox.setSelected(true);
        showFullDescriptionCheckBox.setEnabled(false);

        useFileViewCheckBox = new JCheckBox("Use FileView");
        useFileViewCheckBox.addActionListener(optionListener);
        useFileViewCheckBox.setSelected(false);

        useFileSystemViewCheckBox = new JCheckBox("Use FileSystemView", false);
        useFileSystemViewCheckBox.addActionListener(optionListener);

        useEmbedInWizardCheckBox = new JCheckBox("Embed in Wizard");
        useEmbedInWizardCheckBox.addActionListener(optionListener);
        useEmbedInWizardCheckBox.setSelected(false);

        useControlsCheckBox = new JCheckBox("Show Control Buttons");
        useControlsCheckBox.addActionListener(optionListener);
        useControlsCheckBox.setSelected(true);

        enableDragCheckBox = new JCheckBox("Enable Dragging");
        enableDragCheckBox.addActionListener(optionListener);

        // File or Directory chooser options
        ButtonGroup group3 = new ButtonGroup();
        justFilesRadioButton = new JRadioButton("Just Select Files");
        justFilesRadioButton.setSelected(true);
        group3.add(justFilesRadioButton);
        justFilesRadioButton.addActionListener(optionListener);

        justDirectoriesRadioButton = new JRadioButton("Just Select Directories");
        group3.add(justDirectoriesRadioButton);
        justDirectoriesRadioButton.addActionListener(optionListener);

        bothFilesAndDirectoriesRadioButton = new JRadioButton(
                "Select Files or Directories");
        group3.add(bothFilesAndDirectoriesRadioButton);
        bothFilesAndDirectoriesRadioButton.addActionListener(optionListener);

        singleSelectionRadioButton = new JRadioButton("Single Selection", true);
        singleSelectionRadioButton.addActionListener(optionListener);

        multiSelectionRadioButton = new JRadioButton("Multi Selection");
        multiSelectionRadioButton.addActionListener(optionListener);

        ButtonGroup group4 = new ButtonGroup();
        group4.add(singleSelectionRadioButton);
        group4.add(multiSelectionRadioButton);


        // Create show button
        showButton = new JButton("Show FileChooser");
        showButton.addActionListener(this);
        showButton.setMnemonic('s');

        // Create laf combo box
        lafComboBox = new JComboBox<>(supportedLaFs.toArray(new SupportedLaF[0]));
        lafComboBox.setSelectedItem(nimbusLaF);
        lafComboBox.setEditable(false);
        lafComboBox.addActionListener(optionListener);

        // ********************************************************
        // ******************** Dialog Type ***********************
        // ********************************************************
        JPanel control1 = new InsetPanel(insets);
        control1.setBorder(BorderFactory.createTitledBorder("Dialog Type"));

        control1.setLayout(new BoxLayout(control1, BoxLayout.Y_AXIS));
        control1.add(Box.createRigidArea(vpad20));
        control1.add(openRadioButton);
        control1.add(Box.createRigidArea(vpad7));
        control1.add(saveRadioButton);
        control1.add(Box.createRigidArea(vpad7));
        control1.add(customButton);
        control1.add(Box.createRigidArea(vpad4));
        JPanel fieldWrapper = new JPanel();
        fieldWrapper.setLayout(new BoxLayout(fieldWrapper, BoxLayout.X_AXIS));
        fieldWrapper.setAlignmentX(Component.LEFT_ALIGNMENT);
        fieldWrapper.add(Box.createRigidArea(hpad10));
        fieldWrapper.add(Box.createRigidArea(hpad10));
        fieldWrapper.add(customField);
        control1.add(fieldWrapper);
        control1.add(Box.createRigidArea(vpad20));
        control1.add(Box.createGlue());

        // ********************************************************
        // ***************** Filter Controls **********************
        // ********************************************************
        JPanel control2 = new InsetPanel(insets);
        control2.setBorder(BorderFactory.createTitledBorder("Filter Controls"));
        control2.setLayout(new BoxLayout(control2, BoxLayout.Y_AXIS));
        control2.add(Box.createRigidArea(vpad20));
        control2.add(showAllFilesFilterCheckBox);
        control2.add(Box.createRigidArea(vpad7));
        control2.add(showImageFilesFilterCheckBox);
        control2.add(Box.createRigidArea(vpad4));
        JPanel checkWrapper = new JPanel();
        checkWrapper.setLayout(new BoxLayout(checkWrapper, BoxLayout.X_AXIS));
        checkWrapper.setAlignmentX(Component.LEFT_ALIGNMENT);
        checkWrapper.add(Box.createRigidArea(hpad10));
        checkWrapper.add(Box.createRigidArea(hpad10));
        checkWrapper.add(showFullDescriptionCheckBox);
        control2.add(checkWrapper);
        control2.add(Box.createRigidArea(vpad20));
        control2.add(Box.createGlue());

        // ********************************************************
        // ****************** Display Options *********************
        // ********************************************************
        JPanel control3 = new InsetPanel(insets);
        control3.setBorder(BorderFactory.createTitledBorder("Display Options"));
        control3.setLayout(new BoxLayout(control3, BoxLayout.Y_AXIS));
        control3.add(Box.createRigidArea(vpad20));
        control3.add(setHiddenCheckBox);
        control3.add(Box.createRigidArea(vpad7));
        control3.add(useFileViewCheckBox);
        control3.add(Box.createRigidArea(vpad7));
        control3.add(useFileSystemViewCheckBox);
        control3.add(Box.createRigidArea(vpad7));
        control3.add(accessoryCheckBox);
        control3.add(Box.createRigidArea(vpad7));
        control3.add(useEmbedInWizardCheckBox);
        control3.add(Box.createRigidArea(vpad7));
        control3.add(useControlsCheckBox);
        control3.add(Box.createRigidArea(vpad7));
        control3.add(enableDragCheckBox);
        control3.add(Box.createRigidArea(vpad20));
        control3.add(Box.createGlue());

        // ********************************************************
        // ************* File & Directory Options *****************
        // ********************************************************
        JPanel control4 = new InsetPanel(insets);
        control4.setBorder(BorderFactory.createTitledBorder(
                "File and Directory Options"));
        control4.setLayout(new BoxLayout(control4, BoxLayout.Y_AXIS));
        control4.add(Box.createRigidArea(vpad20));
        control4.add(justFilesRadioButton);
        control4.add(Box.createRigidArea(vpad7));
        control4.add(justDirectoriesRadioButton);
        control4.add(Box.createRigidArea(vpad7));
        control4.add(bothFilesAndDirectoriesRadioButton);
        control4.add(Box.createRigidArea(vpad20));
        control4.add(singleSelectionRadioButton);
        control4.add(Box.createRigidArea(vpad7));
        control4.add(multiSelectionRadioButton);
        control4.add(Box.createRigidArea(vpad20));
        control4.add(Box.createGlue());


        // ********************************************************
        // **************** Look & Feel Switch ********************
        // ********************************************************
        JPanel panel = new JPanel();
        panel.add(new JLabel("Look and Feel: "));
        panel.add(lafComboBox);
        panel.add(showButton);

        // ********************************************************
        // ****************** Wrap 'em all up *********************
        // ********************************************************
        JPanel wrapper = new JPanel();
        wrapper.setLayout(new BoxLayout(wrapper, BoxLayout.X_AXIS));

        add(Box.createRigidArea(vpad20));

        wrapper.add(Box.createRigidArea(hpad10));
        wrapper.add(Box.createRigidArea(hpad10));
        wrapper.add(control1);
        wrapper.add(Box.createRigidArea(hpad10));
        wrapper.add(control2);
        wrapper.add(Box.createRigidArea(hpad10));
        wrapper.add(control3);
        wrapper.add(Box.createRigidArea(hpad10));
        wrapper.add(control4);
        wrapper.add(Box.createRigidArea(hpad10));
        wrapper.add(Box.createRigidArea(hpad10));

        add(wrapper);
        add(Box.createRigidArea(vpad20));
        add(panel);
        add(Box.createRigidArea(vpad20));
    }

    public void actionPerformed(ActionEvent e) {
        if (customButton.isSelected()) {
            chooser.setApproveButtonText(customField.getText());
        }
        if (chooser.isMultiSelectionEnabled()) {
            chooser.setSelectedFiles(null);
        } else {
            chooser.setSelectedFile(null);
        }
        // clear the preview from the previous display of the chooser
        JComponent accessory = chooser.getAccessory();
        if (accessory != null) {
            ((FilePreviewer) accessory).loadImage(null);
        }

        if (useEmbedInWizardCheckBox.isSelected()) {
            WizardDialog wizard = new WizardDialog(frame, true);
            wizard.setVisible(true);
            wizard.dispose();
            return;
        }

        int retval = chooser.showDialog(frame, null);
        if (retval == APPROVE_OPTION) {
            JOptionPane.showMessageDialog(frame, getResultString());
        } else if (retval == CANCEL_OPTION) {
            JOptionPane.showMessageDialog(frame,
                    "User cancelled operation. No file was chosen.");
        } else if (retval == ERROR_OPTION) {
            JOptionPane.showMessageDialog(frame,
                    "An error occurred. No file was chosen.");
        } else {
            JOptionPane.showMessageDialog(frame, "Unknown operation occurred.");
        }
    }

    private void resetFileFilters(boolean enableFilters,
            boolean showExtensionInDescription) {
        chooser.resetChoosableFileFilters();
        if (enableFilters) {
            FileFilter jpgFilter = createFileFilter(
                    "JPEG Compressed Image Files",
                    showExtensionInDescription, "jpg");
            FileFilter gifFilter = createFileFilter("GIF Image Files",
                    showExtensionInDescription, "gif");
            FileFilter bothFilter = createFileFilter("JPEG and GIF Image Files",
                    showExtensionInDescription, "jpg",
                    "gif");
            chooser.addChoosableFileFilter(bothFilter);
            chooser.addChoosableFileFilter(jpgFilter);
            chooser.addChoosableFileFilter(gifFilter);
        }
    }

    private FileFilter createFileFilter(String description,
            boolean showExtensionInDescription, String... extensions) {
        if (showExtensionInDescription) {
            description = createFileNameFilterDescriptionFromExtensions(
                    description, extensions);
        }
        return new FileNameExtensionFilter(description, extensions);
    }

    private String createFileNameFilterDescriptionFromExtensions(
            String description, String[] extensions) {
        String fullDescription = (description == null) ? "(" : description
                + " (";
        // build the description from the extension list
        fullDescription += "." + extensions[0];
        for (int i = 1; i < extensions.length; i++) {
            fullDescription += ", .";
            fullDescription += extensions[i];
        }
        fullDescription += ")";
        return fullDescription;
    }


    private class WizardDialog extends JDialog implements ActionListener {

        CardLayout cardLayout;
        JPanel cardPanel;
        JLabel messageLabel;
        JButton backButton, nextButton, closeButton;

        @SuppressWarnings("LeakingThisInConstructor")
        WizardDialog(JFrame frame, boolean modal) {
            super(frame, "Embedded JFileChooser Demo", modal);

            cardLayout = new CardLayout();
            cardPanel = new JPanel(cardLayout);
            getContentPane().add(cardPanel, BorderLayout.CENTER);

            messageLabel = new JLabel("", JLabel.CENTER);
            cardPanel.add(chooser, "fileChooser");
            cardPanel.add(messageLabel, "label");
            cardLayout.show(cardPanel, "fileChooser");
            chooser.addActionListener(this);

            JPanel buttonPanel = new JPanel();
            backButton = new JButton("< Back");
            nextButton = new JButton("Next >");
            closeButton = new JButton("Close");

            buttonPanel.add(backButton);
            buttonPanel.add(nextButton);
            buttonPanel.add(closeButton);

            getContentPane().add(buttonPanel, BorderLayout.SOUTH);

            backButton.setEnabled(false);
            getRootPane().setDefaultButton(nextButton);

            backButton.addActionListener(this);
            nextButton.addActionListener(this);
            closeButton.addActionListener(this);

            pack();
            setLocationRelativeTo(frame);
        }

        public void actionPerformed(ActionEvent evt) {
            Object src = evt.getSource();
            String cmd = evt.getActionCommand();

            if (src == backButton) {
                back();
            } else if (src == nextButton) {
                FileChooserUI ui = chooser.getUI();
                if (ui instanceof BasicFileChooserUI) {
                    // Workaround for bug 4528663. This is necessary to
                    // pick up the contents of the file chooser text field.
                    // This will trigger an APPROVE_SELECTION action.
                    ((BasicFileChooserUI) ui).getApproveSelectionAction().
                            actionPerformed(null);
                } else {
                    next();
                }
            } else if (src == closeButton) {
                close();
            } else if (APPROVE_SELECTION.equals(cmd)) {
                next();
            } else if (CANCEL_SELECTION.equals(cmd)) {
                close();
            }
        }

        private void back() {
            backButton.setEnabled(false);
            nextButton.setEnabled(true);
            cardLayout.show(cardPanel, "fileChooser");
            getRootPane().setDefaultButton(nextButton);
            chooser.requestFocus();
        }

        private void next() {
            backButton.setEnabled(true);
            nextButton.setEnabled(false);
            messageLabel.setText(getResultString());
            cardLayout.show(cardPanel, "label");
            getRootPane().setDefaultButton(closeButton);
            closeButton.requestFocus();
        }

        private void close() {
            setVisible(false);
        }

        @Override
        public void dispose() {
            chooser.removeActionListener(this);

            // The chooser is hidden by CardLayout on remove
            // so fix it here
            cardPanel.remove(chooser);
            chooser.setVisible(true);

            super.dispose();
        }
    }

    private String getResultString() {
        String resultString;
        String filter;
        if (chooser.getFileFilter() == null) {
            filter = "";
        } else {
            filter = chooser.getFileFilter().getDescription();
        }
        String path = null;
        boolean isDirMode = (chooser.getFileSelectionMode() == DIRECTORIES_ONLY);
        boolean isMulti = chooser.isMultiSelectionEnabled();

        if (isMulti) {
            File[] files = chooser.getSelectedFiles();
            if (files != null && files.length > 0) {
                path = "";
                for (File file : files) {
                    path = path + "<br>" + file.getPath();
                }
            }
        } else {
            File file = chooser.getSelectedFile();
            if (file != null) {
                path = "<br>" + file.getPath();
            }
        }
        if (path != null) {
            path = path.replace(" ", "&nbsp;");
            filter = filter.replace(" ", "&nbsp;");
            resultString =
                    "<html>You chose " + (isMulti ? "these" : "this") + " " + (isDirMode ? (isMulti
                    ? "directories" : "directory")
                    : (isMulti ? "files" : "file")) + ": <code>" + path
                    + "</code><br><br>with filter: <br><code>" + filter;
        } else {
            resultString = "Nothing was chosen";
        }
        return resultString;
    }


    /** An ActionListener that listens to the radio buttons. */
    private class OptionListener implements ActionListener {

        public void actionPerformed(ActionEvent e) {
            JComponent c = (JComponent) e.getSource();
            boolean selected = false;
            if (c instanceof JToggleButton) {
                selected = ((JToggleButton) c).isSelected();
            }

            if (c == openRadioButton) {
                chooser.setDialogType(OPEN_DIALOG);
                customField.setEnabled(false);
                repaint();
            } else if (c == useEmbedInWizardCheckBox) {
                useControlsCheckBox.setEnabled(!selected);
                useControlsCheckBox.setSelected(!selected);
                chooser.setControlButtonsAreShown(!selected);
            } else if (c == useControlsCheckBox) {
                chooser.setControlButtonsAreShown(selected);
            } else if (c == enableDragCheckBox) {
                chooser.setDragEnabled(selected);
            } else if (c == saveRadioButton) {
                chooser.setDialogType(SAVE_DIALOG);
                customField.setEnabled(false);
                repaint();
            } else if (c == customButton || c == customField) {
                customField.setEnabled(true);
                chooser.setDialogType(CUSTOM_DIALOG);
                repaint();
            } else if (c == showAllFilesFilterCheckBox) {
                chooser.setAcceptAllFileFilterUsed(selected);
            } else if (c == showImageFilesFilterCheckBox) {
                resetFileFilters(selected,
                        showFullDescriptionCheckBox.isSelected());
                showFullDescriptionCheckBox.setEnabled(selected);
            } else if (c == setHiddenCheckBox) {
                chooser.setFileHidingEnabled(!selected);
            } else if (c == accessoryCheckBox) {
                if (selected) {
                    chooser.setAccessory(previewer);
                } else {
                    chooser.setAccessory(null);
                }
            } else if (c == useFileViewCheckBox) {
                if (selected) {
                    chooser.setFileView(fileView);
                } else {
                    chooser.setFileView(null);
                }
            } else if (c == useFileSystemViewCheckBox) {
                if (selected) {
                    chooser.setFileSystemView(fileSystemView);
                } else {
                    // Restore default behaviour
                    chooser.setFileSystemView(FileSystemView.getFileSystemView());
                }
            } else if (c == showFullDescriptionCheckBox) {
                resetFileFilters(showImageFilesFilterCheckBox.isSelected(),
                        selected);
            } else if (c == justFilesRadioButton) {
                chooser.setFileSelectionMode(FILES_ONLY);
            } else if (c == justDirectoriesRadioButton) {
                chooser.setFileSelectionMode(DIRECTORIES_ONLY);
            } else if (c == bothFilesAndDirectoriesRadioButton) {
                chooser.setFileSelectionMode(FILES_AND_DIRECTORIES);
            } else if (c == singleSelectionRadioButton) {
                if (selected) {
                    chooser.setMultiSelectionEnabled(false);
                }
            } else if (c == multiSelectionRadioButton) {
                if (selected) {
                    chooser.setMultiSelectionEnabled(true);
                }
            } else if (c == lafComboBox) {
                SupportedLaF supportedLaF = ((SupportedLaF) lafComboBox.
                        getSelectedItem());
                LookAndFeel laf = supportedLaF.laf;
                try {
                    UIManager.setLookAndFeel(laf);
                    SwingUtilities.updateComponentTreeUI(frame);
                    if (chooser != null) {
                        SwingUtilities.updateComponentTreeUI(chooser);
                    }
                    frame.pack();
                } catch (UnsupportedLookAndFeelException exc) {
                    // This should not happen because we already checked
                    ((DefaultComboBoxModel<?>) lafComboBox.getModel()).
                            removeElement(supportedLaF);
                }
            }

        }
    }


    private class FilePreviewer extends JComponent implements
            PropertyChangeListener {

        ImageIcon thumbnail = null;

        @SuppressWarnings("LeakingThisInConstructor")
        public FilePreviewer(JFileChooser fc) {
            setPreferredSize(new Dimension(100, 50));
            fc.addPropertyChangeListener(this);
        }

        public void loadImage(File f) {
            if (f == null) {
                thumbnail = null;
            } else {
                ImageIcon tmpIcon = new ImageIcon(f.getPath());
                if (tmpIcon.getIconWidth() > 90) {
                    thumbnail = new ImageIcon(
                            tmpIcon.getImage().getScaledInstance(90, -1,
                            Image.SCALE_DEFAULT));
                } else {
                    thumbnail = tmpIcon;
                }
            }
        }

        public void propertyChange(PropertyChangeEvent e) {
            String prop = e.getPropertyName();
            if (SELECTED_FILE_CHANGED_PROPERTY.equals(prop)) {
                if (isShowing()) {
                    loadImage((File) e.getNewValue());
                    repaint();
                }
            }
        }

        @Override
        public void paint(Graphics g) {
            if (thumbnail != null) {
                int x = getWidth() / 2 - thumbnail.getIconWidth() / 2;
                int y = getHeight() / 2 - thumbnail.getIconHeight() / 2;
                if (y < 0) {
                    y = 0;
                }

                if (x < 5) {
                    x = 5;
                }
                thumbnail.paintIcon(this, g, x, y);
            }
        }
    }

    public static void main(String[] s) {
        try {
            SwingUtilities.invokeAndWait(new Runnable() {

                public void run() {
                    /*
                     * NOTE: By default, the look and feel will be set to the
                     * Cross Platform Look and Feel (which is currently Metal).
                     * The following code tries to set the Look and Feel to Nimbus.
                     * https://docs.oracle.com/javase/tutorial/uiswing/lookandfeel/nimbus.html
                     */
                    try {
                        for (LookAndFeelInfo info : UIManager.
                                getInstalledLookAndFeels()) {
                            if (NIMBUS_LAF_NAME.equals(info.getName())) {
                                UIManager.setLookAndFeel(info.getClassName());
                                break;
                            }
                        }
                    } catch (Exception ignored) {
                    }

                    FileChooserDemo panel = new FileChooserDemo();

                    frame = new JFrame("FileChooserDemo");
                    frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
                    frame.getContentPane().add("Center", panel);
                    frame.pack();
                    frame.setVisible(true);
                }
            });
        } catch (InterruptedException ex) {
            Logger.getLogger(FileChooserDemo.class.getName()).log(Level.SEVERE,
                    null,
                    ex);
        } catch (InvocationTargetException ex) {
            Logger.getLogger(FileChooserDemo.class.getName()).log(Level.SEVERE,
                    null,
                    ex);
        }
    }


    private static class InsetPanel extends JPanel {

        Insets i;

        InsetPanel(Insets i) {
            this.i = i;
        }

        @Override
        public Insets getInsets() {
            return i;
        }
    }
}