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Java example source code file (FileChooserDemo.java)
This example Java source code file (FileChooserDemo.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.
The FileChooserDemo.java Java example source code
/*
* Copyright (c) 1998, 2013, 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 lafComboBox;
private JRadioButton justFilesRadioButton;
private JRadioButton justDirectoriesRadioButton;
private JRadioButton bothFilesAndDirectoriesRadioButton;
private JTextField customField;
private final ExampleFileView fileView;
private final ExampleFileSystemView fileSystemView;
private final static Dimension hpad10 = new Dimension(10, 1);
private final static Dimension vpad20 = new Dimension(1, 20);
private final static Dimension vpad7 = new Dimension(1, 7);
private final static Dimension vpad4 = new Dimension(1, 4);
private final static 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.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());
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(" ", " ");
filter = filter.replace(" ", " ");
resultString =
"<html>You chose " + (isMulti ? "these" : "this") + " " + (isDirMode ? (isMulti
? "directories" : "directory")
: (isMulti ? "files" : "file")) + ": <code>" + path
+ "</code>
with filter:
" + 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.
* http://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;
}
}
}
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