SwingList.java

package com.blogspot.borneq;

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Event;
import java.awt.Font;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.File;
import java.util.ArrayList;

import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.DefaultListCellRenderer;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JToolBar;
import javax.swing.KeyStroke;
import javax.swing.ListSelectionModel;
import javax.swing.SwingUtilities;
import javax.swing.border.LineBorder;
import javax.swing.filechooser.FileNameExtensionFilter;

public class SwingList extends JFrame {
    private JScrollPane listScrollPane;
    private JFileChooser chooser;

    public SwingList() {
        initUI();
        initChooser();
        setPreferredSize(new Dimension(280, 450));
        setLocationRelativeTo(null);
        pack();
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    private void initChooser() {
        chooser = new JFileChooser();
        String appPath = getClass().getProtectionDomain().getCodeSource().getLocation().getPath();
        if (System.getProperty("os.name").startsWith("Windows")) {
            // appPath is in form: /D:/code/midi/MidPlayer/bin/ and need remove
            // first "/"
            appPath = appPath.substring(1);
        }
        // in jars appPath ends with jar name else end with "/"
        if (appPath.endsWith(".jar")) {
            File file = new File(appPath);
            appPath = file.getAbsoluteFile().getParent();
        }
        chooser.setCurrentDirectory(new File(appPath));
        FileNameExtensionFilter filter = new FileNameExtensionFilter("Image files", "jpg", "jpeg");
        chooser.setFileFilter(filter);
        ImagePreviewer previewer = new ImagePreviewer(chooser);
        chooser.setAccessory(previewer);
    }

    public class ListRenderer extends DefaultListCellRenderer {
        private static final long serialVersionUID = -4562876189013579797L;
        Font font = new Font("helvitica", Font.PLAIN, 12);
        ArrayList<ImageIcon> imageList = new ArrayList<ImageIcon>();

        @Override
        public Component getListCellRendererComponent(JList<?> list, Object value, int index, boolean isSelected,
                boolean cellHasFocus) {
            JLabel label = (JLabel) super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
            label.setVerticalTextPosition(JLabel.CENTER);
            label.setFont(font);
            label.setIcon(imageList.get(0));
            return label;
        }
    }

    private void initUI() {
        createMenuBar();
        createToolBar();

        JLabel statusbar = new JLabel("Statusbar");
        statusbar.setBorder(LineBorder.createGrayLineBorder());
        add(statusbar, BorderLayout.SOUTH);

        JPanel panel = new JPanel(new BorderLayout());
        add(panel, BorderLayout.CENTER);
        JPanel bottomPanel = new JPanel();
        bottomPanel.setLayout(new BoxLayout(bottomPanel, BoxLayout.X_AXIS));
        panel.add(bottomPanel, BorderLayout.SOUTH);
        JButton buttonDraw = new JButton("Draw");
        bottomPanel.add(buttonDraw);
        JTextField entry = new JTextField();
        bottomPanel.add(entry);
        JButton buttonBench = new JButton("Bench");
        bottomPanel.add(buttonBench);
        listScrollPane = new JScrollPane();
        panel.add(listScrollPane, BorderLayout.CENTER);
    }

    private void createToolBar() {
        JToolBar toolbar = new JToolBar();
        JButton openButton = new JButton("Open");
        toolbar.add(openButton);
        openButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                openImage();
            }
        });
        add(toolbar, BorderLayout.NORTH);
    }

    protected void openImage() {
        int result = chooser.showOpenDialog(null);

        // if file selected, set it as icon of the label
        if (result == JFileChooser.APPROVE_OPTION) {
            String[] nameList = { "One", "Two", "Three" };
            String name = chooser.getSelectedFile().getPath();
            File img = new File(name);
            ListRenderer listRenderer = new ListRenderer();
            ImageIcon icon = new ImageIcon(name);
            icon = new ImageIcon(icon.getImage().getScaledInstance(200, -1, Image.SCALE_DEFAULT));
            listRenderer.imageList.add(icon);
            JList<String> list;
            list = new JList<String>(nameList);
            list.setCellRenderer(listRenderer);
            list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
            list.setSelectedIndex(0);
            listScrollPane.setViewportView(list);
        }
    }

    private void createMenuBar() {
        JMenuBar menubar = new JMenuBar();
        JMenu menuFile = new JMenu("File");
        ImageIcon icon = new ImageIcon("exit.png");
        JMenuItem menuItemExit = new JMenuItem("Exit", icon);
        menuItemExit.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent event) {
                System.exit(0);
            }
        });
        menuFile.setMnemonic(KeyEvent.VK_F);
        menuItemExit.setMnemonic(KeyEvent.VK_X);
        menuItemExit.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F4, Event.ALT_MASK));
        menuFile.add(menuItemExit);
        menubar.add(menuFile);
        setJMenuBar(menubar);
    }

    private static final long serialVersionUID = 8359448221778584189L;

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                SwingList app = new SwingList();
                app.setVisible(true);
            }
        });
    }
}

/**
 * A file chooser accessory that previews images.
 */
class ImagePreviewer extends JLabel {
    private static final long serialVersionUID = 5705786197509036596L;

    /**
     * Constructs an ImagePreviewer.
     *
     * @param chooser
     *            the file chooser whose property changes trigger an image
     *            change in this previewer
     */
    public ImagePreviewer(JFileChooser chooser) {
        setPreferredSize(new Dimension(100, 100));
        setBorder(BorderFactory.createEtchedBorder());

        chooser.addPropertyChangeListener(new PropertyChangeListener() {
            public void propertyChange(PropertyChangeEvent event) {
                if (event.getPropertyName() == JFileChooser.SELECTED_FILE_CHANGED_PROPERTY) {
                    // the user has selected a new file
                    File f = (File) event.getNewValue();
                    if (f == null) {
                        setIcon(null);
                        return;
                    }
                    // read the image into an icon
                    ImageIcon icon = new ImageIcon(f.getPath());
                    // if the icon is too large to fit, scale it
                    if (icon.getIconWidth() > getWidth())
                        icon = new ImageIcon(icon.getImage().getScaledInstance(getWidth(), -1, Image.SCALE_DEFAULT));

                    setIcon(icon);
                }
            }
        });
    }
}