import java.io.*; import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.filechooser.*; /* * FileChooserDemo2.java is a 1.4 application that requires these files: * ImageFileView.java * ImageFilter.java * ImagePreview.java * Utils.java * images/jpgIcon.gif (required by ImageFileView.java) * images/gifIcon.gif (required by ImageFileView.java) * images/tiffIcon.gif (required by ImageFileView.java) * images/pngIcon.png (required by ImageFileView.java) */ public class FileChooserDemo2 extends JPanel implements ActionListener { static private String newline = "\n"; private JTextArea log; private JFileChooser fc; public FileChooserDemo2() { super(new BorderLayout()); //Create the log first, because the action listener //needs to refer to it. log = new JTextArea(5,20); log.setMargin(new Insets(5,5,5,5)); log.setEditable(false); JScrollPane logScrollPane = new JScrollPane(log); JButton sendButton = new JButton("Attach..."); sendButton.addActionListener(this); add(sendButton, BorderLayout.PAGE_START); add(logScrollPane, BorderLayout.CENTER); } public void actionPerformed(ActionEvent e) { //Set up the file chooser. if (fc == null) { fc = new JFileChooser(); //Add a custom file filter and disable the default //(Accept All) file filter. fc.addChoosableFileFilter(new ImageFilter()); fc.setAcceptAllFileFilterUsed(false); //Add custom icons for file types. fc.setFileView(new ImageFileView()); //Add the preview pane. fc.setAccessory(new ImagePreview(fc)); } //Show it. int returnVal = fc.showDialog(FileChooserDemo2.this, "Attach"); //Process the results. if (returnVal == JFileChooser.APPROVE_OPTION) { File file = fc.getSelectedFile(); log.append("Attaching file: " + file.getName() + "." + newline); } else { log.append("Attachment cancelled by user." + newline); } log.setCaretPosition(log.getDocument().getLength()); //Reset the file chooser for the next time it's shown. fc.setSelectedFile(null); } /** * Create the GUI and show it. For thread safety, * this method should be invoked from the * event-dispatching thread. */ private static void createAndShowGUI() { //Make sure we have nice window decorations. JFrame.setDefaultLookAndFeelDecorated(true); JDialog.setDefaultLookAndFeelDecorated(true); //Create and set up the window. JFrame frame = new JFrame("FileChooserDemo2"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Create and set up the content pane. JComponent newContentPane = new FileChooserDemo2(); newContentPane.setOpaque(true); //content panes must be opaque frame.setContentPane(newContentPane); //Display the window. frame.pack(); frame.setVisible(true); } public static void main(String[] args) { //Schedule a job for the event-dispatching thread: //creating and showing this application's GUI. javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } }