FileChooserDemopublic class FileChooserDemo extends JPanel implements ActionListener| A demo which makes extensive use of the file chooser.
1.9 04/23/99 |
| Fields Summary |
|---|
| static JFrame | frame | | static String | metal | | static String | metalClassName | | static String | motif | | static String | motifClassName | | static String | windows | | static String | windowsClassName | | JButton | button | | JCheckBox | useFileViewButton | | JCheckBox | accessoryButton | | JCheckBox | hiddenButton | | JCheckBox | showFullDescriptionButton | | JButton | noAllFilesFilterButton | | JButton | yesAllFilesFilterButton | | JRadioButton | addFiltersButton | | JRadioButton | defaultFiltersButton | | JRadioButton | openButton | | JRadioButton | saveButton | | JRadioButton | customButton | | JRadioButton | metalButton | | JRadioButton | motifButton | | JRadioButton | windowsButton | | JRadioButton | justFilesButton | | JRadioButton | justDirectoriesButton | | JRadioButton | bothFilesAndDirectoriesButton | | JTextField | customField | | ExampleFileFilter | jpgFilter | | ExampleFileFilter | gifFilter | | ExampleFileFilter | bothFilter | | ExampleFileView | fileView | | JPanel | buttonPanel | | public static final Dimension | hpad10 | | public static final Dimension | vpad10 | | FilePreviewer | previewer | | JFileChooser | chooser |
| Constructors Summary |
|---|
public FileChooserDemo()
setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
chooser = new JFileChooser();
previewer = new FilePreviewer(chooser);
chooser.setAccessory(previewer);
jpgFilter = new ExampleFileFilter("jpg", "JPEG Compressed Image Files");
gifFilter = new ExampleFileFilter("gif", "GIF Image Files");
bothFilter = new ExampleFileFilter(new String[] {"jpg", "gif"}, "JPEG and GIF Image Files");
fileView = new ExampleFileView();
fileView.putIcon("jpg", new ImageIcon("images/jpgIcon.jpg"));
fileView.putIcon("gif", new ImageIcon("images/gifIcon.gif"));
chooser.setAccessory(previewer);
chooser.setFileView(fileView);
// create a radio listener to listen to option changes
OptionListener optionListener = new OptionListener();
// Create options
openButton = new JRadioButton("Open");
openButton.setSelected(true);
openButton.addActionListener(optionListener);
saveButton = new JRadioButton("Save");
saveButton.addActionListener(optionListener);
customButton = new JRadioButton("Custom");
customButton.addActionListener(optionListener);
customField = new JTextField("Doit");
customField.setAlignmentY(JComponent.TOP_ALIGNMENT);
customField.setEnabled(false);
customField.addActionListener(optionListener);
ButtonGroup group1 = new ButtonGroup();
group1.add(openButton);
group1.add(saveButton);
group1.add(customButton);
// filter buttons
noAllFilesFilterButton = new JButton("Remove \"All Files\" Filter");
noAllFilesFilterButton.addActionListener(optionListener);
yesAllFilesFilterButton = new JButton("Add \"All Files\" Filter");
yesAllFilesFilterButton.addActionListener(optionListener);
defaultFiltersButton = new JRadioButton("Default Filtering");
defaultFiltersButton.setSelected(true);
defaultFiltersButton.addActionListener(optionListener);
addFiltersButton = new JRadioButton("Add JPG and GIF Filters");
addFiltersButton.addActionListener(optionListener);
ButtonGroup group2 = new ButtonGroup();
group2.add(addFiltersButton);
group2.add(defaultFiltersButton);
accessoryButton = new JCheckBox("Show Preview");
accessoryButton.addActionListener(optionListener);
accessoryButton.setSelected(true);
// more options
hiddenButton = new JCheckBox("Show Hidden Files");
hiddenButton.addActionListener(optionListener);
showFullDescriptionButton = new JCheckBox("Show Extensions");
showFullDescriptionButton.addActionListener(optionListener);
showFullDescriptionButton.setSelected(true);
useFileViewButton = new JCheckBox("Use FileView");
useFileViewButton.addActionListener(optionListener);
useFileViewButton.setSelected(true);
// File or Directory chooser options
ButtonGroup group3 = new ButtonGroup();
justFilesButton = new JRadioButton("Just Select Files");
justFilesButton.setSelected(true);
group3.add(justFilesButton);
justFilesButton.addActionListener(optionListener);
justDirectoriesButton = new JRadioButton("Just Select Directories");
group3.add(justDirectoriesButton);
justDirectoriesButton.addActionListener(optionListener);
bothFilesAndDirectoriesButton = new JRadioButton("Select Files or Directories");
group3.add(bothFilesAndDirectoriesButton);
bothFilesAndDirectoriesButton.addActionListener(optionListener);
// Create show button
button = new JButton("Show FileChooser");
button.addActionListener(this);
button.setMnemonic('s");
// Create laf buttons.
metalButton = new JRadioButton(metal);
metalButton.setMnemonic('o");
metalButton.setActionCommand(metalClassName);
motifButton = new JRadioButton(motif);
motifButton.setMnemonic('m");
motifButton.setActionCommand(motifClassName);
windowsButton = new JRadioButton(windows);
windowsButton.setMnemonic('w");
windowsButton.setActionCommand(windowsClassName);
ButtonGroup group4 = new ButtonGroup();
group4.add(metalButton);
group4.add(motifButton);
group4.add(windowsButton);
// Register a listener for the laf buttons.
metalButton.addActionListener(optionListener);
motifButton.addActionListener(optionListener);
windowsButton.addActionListener(optionListener);
JPanel control1 = new JPanel();
control1.setLayout(new BoxLayout(control1, BoxLayout.X_AXIS));
control1.add(Box.createRigidArea(hpad10));
control1.add(openButton);
control1.add(Box.createRigidArea(hpad10));
control1.add(saveButton);
control1.add(Box.createRigidArea(hpad10));
control1.add(customButton);
control1.add(customField);
control1.add(Box.createRigidArea(hpad10));
JPanel control2 = new JPanel();
control2.setLayout(new BoxLayout(control2, BoxLayout.X_AXIS));
control2.add(Box.createRigidArea(hpad10));
control2.add(noAllFilesFilterButton);
control2.add(Box.createRigidArea(hpad10));
control2.add(yesAllFilesFilterButton);
control2.add(Box.createRigidArea(hpad10));
control2.add(defaultFiltersButton);
control2.add(Box.createRigidArea(hpad10));
control2.add(addFiltersButton);
control2.add(Box.createRigidArea(hpad10));
control2.add(accessoryButton);
control2.add(Box.createRigidArea(hpad10));
JPanel control3 = new JPanel();
control3.setLayout(new BoxLayout(control3, BoxLayout.X_AXIS));
control3.add(Box.createRigidArea(hpad10));
control3.add(hiddenButton);
control3.add(Box.createRigidArea(hpad10));
control3.add(showFullDescriptionButton);
control3.add(Box.createRigidArea(hpad10));
control3.add(useFileViewButton);
control3.add(Box.createRigidArea(hpad10));
JPanel control4 = new JPanel();
control4.setLayout(new BoxLayout(control4, BoxLayout.X_AXIS));
control4.add(Box.createRigidArea(hpad10));
control4.add(justFilesButton);
control4.add(Box.createRigidArea(hpad10));
control4.add(justDirectoriesButton);
control4.add(Box.createRigidArea(hpad10));
control4.add(bothFilesAndDirectoriesButton);
control4.add(Box.createRigidArea(hpad10));
JPanel panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));
panel.add(Box.createRigidArea(hpad10));
panel.add(button);
panel.add(Box.createRigidArea(hpad10));
panel.add(metalButton);
panel.add(Box.createRigidArea(hpad10));
panel.add(motifButton);
panel.add(Box.createRigidArea(hpad10));
panel.add(windowsButton);
panel.add(Box.createRigidArea(hpad10));
add(Box.createRigidArea(vpad10));
add(control1);
add(Box.createRigidArea(vpad10));
add(control2);
add(Box.createRigidArea(vpad10));
add(control3);
add(Box.createRigidArea(vpad10));
add(control4);
add(Box.createRigidArea(vpad10));
add(Box.createRigidArea(vpad10));
add(panel);
add(Box.createRigidArea(vpad10));
|
| Methods Summary |
|---|
| public void | actionPerformed(java.awt.event.ActionEvent e)
int retval = chooser.showDialog(frame, null);
if(retval == JFileChooser.APPROVE_OPTION) {
File theFile = chooser.getSelectedFile();
if(theFile != null) {
if(theFile.isDirectory()) {
JOptionPane.showMessageDialog(
frame, "You chose this directory: " +
chooser.getSelectedFile().getAbsolutePath()
);
} else {
JOptionPane.showMessageDialog(
frame, "You chose this file: " +
chooser.getSelectedFile().getAbsolutePath()
);
}
return;
}
}
JOptionPane.showMessageDialog(frame, "No file was chosen.");
| | public static void | main(java.lang.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);
}
*/
try {
// UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
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);
panel.updateState();
| | public void | updateState()
String lnfName = UIManager.getLookAndFeel().getClass().getName();
if (lnfName.indexOf(metal) >= 0) {
metalButton.setSelected(true);
} else if (lnfName.indexOf(windows) >= 0) {
windowsButton.setSelected(true);
} else if (lnfName.indexOf(motif) >= 0) {
motifButton.setSelected(true);
} else {
System.err.println("FileChooserDemo if using an unknown L&F: " + lnfName);
}
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