public ImageViewerFrame() {
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
// set up menu bar
JMenuBar menuBar = new JMenuBar();
setJMenuBar(menuBar);
JMenu menu = new JMenu("File");
menuBar.add(menu);
JMenuItem openItem = new JMenuItem("Open");
menu.add(openItem);
openItem.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent event) {
chooser.setCurrentDirectory(new File("."));
// show file chooser dialog
int result = chooser.showOpenDialog(ImageViewerFrame.this);
// if image file accepted, set it as icon of the label
if (result == JFileChooser.APPROVE_OPTION) {
String name = chooser.getSelectedFile().getPath();
label.setIcon(new ImageIcon(name));
pack();
}
}
});
JMenuItem exitItem = new JMenuItem("Exit");
menu.add(exitItem);
exitItem.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent event) {
System.exit(0);
}
});
// use a label to display the images
label = new JLabel();
add(label);
// set up file chooser
chooser = new JFileChooser();
// accept all image files ending with .jpg, .jpeg, .gif
/*
final ExtensionFileFilter filter = new ExtensionFileFilter();
filter.addExtension("jpg");
filter.addExtension("jpeg");
filter.addExtension("gif");
filter.setDescription("Image files");
*/
FileNameExtensionFilter filter =
new FileNameExtensionFilter("Image files", "jpg", "jpeg", "gif");
chooser.setFileFilter(filter);
chooser.setAccessory(new ImagePreviewer(chooser));
chooser.setFileView(new FileIconView(filter, new ImageIcon("palette.gif")));
}
/** register for events from the specified file chooser */
public void applyTo(final JFileChooser fileChooser) {
fileChooser.setAccessory(new AccessoryView().getComponent());
applyDefaultFolder(fileChooser);
fileChooser.addPropertyChangeListener(this);
}