Mega Code Archive
A demo which makes extensive use of the file chooser
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/*
* @(#)FileChooserDemo.java 1.31 06/02/03
*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* -Redistribution of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* -Redistribution 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 Sun Microsystems, Inc. or the names of contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
* ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
* OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
* AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
* AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
* REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
* INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
* OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
* EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed, licensed or intended
* for use in the design, construction, operation or maintenance of any
* nuclear facility.
*/
/*
* @(#)FileChooserDemo.java 1.31 06/02/03
*/
import static javax.swing.JFileChooser.APPROVE_OPTION;
import static javax.swing.JFileChooser.APPROVE_SELECTION;
import static javax.swing.JFileChooser.CANCEL_OPTION;
import static javax.swing.JFileChooser.CANCEL_SELECTION;
import static javax.swing.JFileChooser.CUSTOM_DIALOG;
import static javax.swing.JFileChooser.DIRECTORIES_ONLY;
import static javax.swing.JFileChooser.ERROR_OPTION;
import static javax.swing.JFileChooser.FILES_AND_DIRECTORIES;
import static javax.swing.JFileChooser.FILES_ONLY;
import static javax.swing.JFileChooser.OPEN_DIALOG;
import static javax.swing.JFileChooser.SAVE_DIALOG;
import static javax.swing.JFileChooser.SELECTED_FILE_CHANGED_PROPERTY;
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.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.File;
import java.util.Hashtable;
import java.util.Vector;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.ButtonGroup;
import javax.swing.DefaultComboBoxModel;
import javax.swing.Icon;
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.filechooser.FileFilter;
import javax.swing.filechooser.FileNameExtensionFilter;
import javax.swing.filechooser.FileView;
import javax.swing.plaf.FileChooserUI;
import javax.swing.plaf.basic.BasicFileChooserUI;
/**
*
* A demo which makes extensive use of the file chooser.
*
* 1.31 02/03/06
*
* @author Jeff Dinkins
*/
public class FileChooserDemo extends JPanel implements ActionListener {
static JFrame frame;
Vector<SupportedLaF> supportedLaFs = new Vector();
static class SupportedLaF {
String name;
LookAndFeel laf;
SupportedLaF(String name, LookAndFeel laf) {
this.name = name;
this.laf = laf;
}
public String toString() {
return name;
}
}
JButton showButton;
JCheckBox showAllFilesFilterCheckBox;
JCheckBox showImageFilesFilterCheckBox;
JCheckBox showFullDescriptionCheckBox;
JCheckBox useFileViewCheckBox;
JCheckBox accessoryCheckBox;
JCheckBox setHiddenCheckBox;
JCheckBox useEmbedInWizardCheckBox;
JCheckBox useControlsCheckBox;
JCheckBox enableDragCheckBox;
JRadioButton singleSelectionRadioButton;
JRadioButton multiSelectionRadioButton;
JRadioButton openRadioButton;
JRadioButton saveRadioButton;
JRadioButton customButton;
JComboBox lafComboBox;
JRadioButton justFilesRadioButton;
JRadioButton justDirectoriesRadioButton;
JRadioButton bothFilesAndDirectoriesRadioButton;
JTextField customField;
FileFilter jpgFilter, gifFilter, bothFilter;
ExampleFileView fileView;
JPanel buttonPanel;
public final static Dimension hpad10 = new Dimension(10, 1);
public final static Dimension vpad20 = new Dimension(1, 20);
public final static Dimension vpad7 = new Dimension(1, 7);
public final static Dimension vpad4 = new Dimension(1, 4);
public final static Insets insets = new Insets(5, 10, 0, 10);
FilePreviewer previewer;
JFileChooser chooser;
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();
supportedLaFs.add(new SupportedLaF(name, laf));
}
} catch (Exception e) { // If ANYTHING weird happens, don't add it
continue;
}
}
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 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) {
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);
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);
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(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 occured. No file was chosen.");
} else {
JOptionPane.showMessageDialog(frame, "Unknown operation occured.");
}
}
private void resetFileFilters(boolean enableFilters, boolean showExtensionInDescription) {
chooser.resetChoosableFileFilters();
if (enableFilters) {
jpgFilter = createFileFilter("JPEG Compressed Image Files", showExtensionInDescription, "jpg");
gifFilter = createFileFilter("GIF Image Files", showExtensionInDescription, "gif");
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;
}
class WizardDialog extends JDialog implements ActionListener {
CardLayout cardLayout;
JPanel cardPanel;
JLabel messageLabel;
JButton backButton, nextButton, closeButton;
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 (cmd == APPROVE_SELECTION) {
next();
} else if (cmd == CANCEL_SELECTION) {
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);
}
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 = null;
String 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 (int i = 0; i < files.length; i++) {
path = path + "<br>" + files[i].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><br><br>with filter: <br><code>" + filter;
} else {
resultString = "Nothing was chosen";
}
return resultString;
}
/** An ActionListener that listens to the radio buttons. */
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 == 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);
}
}
}
}
class FilePreviewer extends JComponent implements PropertyChangeListener {
ImageIcon thumbnail = null;
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 (prop == SELECTED_FILE_CHANGED_PROPERTY) {
if (isShowing()) {
loadImage((File) e.getNewValue());
repaint();
}
}
}
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[]) {
/*
* NOTE: By default, the look and feel will be set to the Cross Platform
* Look and Feel (which is currently Metal). The user may someday be able to
* override the default via a system property. If you as the developer want
* to be sure that a particular L&F is set, you can do so by calling
* UIManager.setLookAndFeel(). For example, the first code snippet below
* forcibly sets the UI to be the System Look and Feel. The second code
* snippet forcibly sets the look and feel to the Cross Platform L&F.
*
* Snippet 1: try {
* UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); }
* catch (Exception exc) { System.err.println("Error loading L&F: " + exc); }
*
* Snippet 2: try {
* UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName()); }
* catch (Exception exc) { System.err.println("Error loading L&F: " + exc); }
*/
FileChooserDemo panel = new FileChooserDemo();
frame = new JFrame("FileChooserDemo");
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
frame.getContentPane().add("Center", panel);
frame.pack();
frame.setVisible(true);
}
class InsetPanel extends JPanel {
Insets i;
InsetPanel(Insets i) {
this.i = i;
}
public Insets getInsets() {
return i;
}
}
/**
* A utility function that layers on top of the LookAndFeel's
* isSupportedLookAndFeel() method. Returns true if the LookAndFeel is
* supported. Returns false if the LookAndFeel is not supported and/or if
* there is any kind of error checking if the LookAndFeel is supported.
*
* The L&F menu will use this method to detemine whether the various L&F
* options should be active or inactive.
*
*/
protected boolean isAvailableLookAndFeel(String laf) {
try {
Class lnfClass = Class.forName(laf);
LookAndFeel newLAF = (LookAndFeel) (lnfClass.newInstance());
return newLAF.isSupportedLookAndFeel();
} catch (Exception e) { // If ANYTHING weird happens, return false
return false;
}
}
}
/*
* @(#)ExampleFileView.java 1.18 05/11/30
*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* -Redistribution of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* -Redistribution 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 Sun Microsystems, Inc. or the names of contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS
* LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A
* RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
* IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT
* OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR
* PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS
* BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed, licensed or intended for
* use in the design, construction, operation or maintenance of any nuclear
* facility.
*/
/*
* @(#)ExampleFileView.java 1.18 05/11/30
*/
/**
* A convenience implementation of the FileView interface that manages name,
* icon, traversable, and file type information.
*
* This this implemention will work well with file systems that use "dot"
* extensions to indicate file type. For example: "picture.gif" as a gif image.
*
* If the java.io.File ever contains some of this information, such as file
* type, icon, and hidden file inforation, this implementation may become
* obsolete. At minimum, it should be rewritten at that time to use any new type
* information provided by java.io.File
*
* Example: JFileChooser chooser = new JFileChooser(); fileView = new
* ExampleFileView(); fileView.putIcon("jpg", new
* ImageIcon("images/jpgIcon.jpg")); fileView.putIcon("gif", new
* ImageIcon("images/gifIcon.gif")); chooser.setFileView(fileView);
*
* @version 1.18 11/30/05
* @author Jeff Dinkins
*/
class ExampleFileView extends FileView {
private Hashtable icons = new Hashtable(5);
private Hashtable fileDescriptions = new Hashtable(5);
private Hashtable typeDescriptions = new Hashtable(5);
/**
* The name of the file. Do nothing special here. Let the system file view
* handle this.
*
* @see FileView#getName
*/
public String getName(File f) {
return null;
}
/**
* Adds a human readable description of the file.
*/
public void putDescription(File f, String fileDescription) {
fileDescriptions.put(f, fileDescription);
}
/**
* A human readable description of the file.
*
* @see FileView#getDescription
*/
public String getDescription(File f) {
return (String) fileDescriptions.get(f);
};
/**
* Adds a human readable type description for files. Based on "dot" extension
* strings, e.g: ".gif". Case is ignored.
*/
public void putTypeDescription(String extension, String typeDescription) {
typeDescriptions.put(extension, typeDescription);
}
/**
* Adds a human readable type description for files of the type of the passed
* in file. Based on "dot" extension strings, e.g: ".gif". Case is ignored.
*/
public void putTypeDescription(File f, String typeDescription) {
putTypeDescription(getExtension(f), typeDescription);
}
/**
* A human readable description of the type of the file.
*
* @see FileView#getTypeDescription
*/
public String getTypeDescription(File f) {
return (String) typeDescriptions.get(getExtension(f));
}
/**
* Convenience method that returns the "dot" extension for the given file.
*/
public String getExtension(File f) {
String name = f.getName();
if (name != null) {
int extensionIndex = name.lastIndexOf('.');
if (extensionIndex < 0) {
return null;
}
return name.substring(extensionIndex + 1).toLowerCase();
}
return null;
}
/**
* Adds an icon based on the file type "dot" extension string, e.g: ".gif".
* Case is ignored.
*/
public void putIcon(String extension, Icon icon) {
icons.put(extension, icon);
}
/**
* Icon that reperesents this file. Default implementation returns null. You
* might want to override this to return something more interesting.
*
* @see FileView#getIcon
*/
public Icon getIcon(File f) {
Icon icon = null;
String extension = getExtension(f);
if (extension != null) {
icon = (Icon) icons.get(extension);
}
return icon;
}
/**
* Whether the directory is traversable or not. Generic implementation returns
* true for all directories and special folders.
*
* You might want to subtype ExampleFileView to do somethimg more interesting,
* such as recognize compound documents directories; in such a case you might
* return a special icon for the directory that makes it look like a regular
* document, and return false for isTraversable to not allow users to descend
* into the directory.
*
* @see FileView#isTraversable
*/
public Boolean isTraversable(File f) {
// if (some_reason) {
// return Boolean.FALSE;
// }
return null; // Use default from FileSystemView
};
}
]]>