import com.sun.java.swing.*;
import java.awt.*;
import java.awt.event.*;

/* 
 * XXX: This class is implemented as a weird mix of class and instance
 * methods/variables.  I should clean up the API.
 */
public class TableDialog extends JDialog {
    static TableDialog dialog;
    static String value = "";
    JList list;

    public static void showDialog(Component comp,
                                  String newValue, 
                                  Object[] possibleValues,
                                  String title) {
        if (dialog == null) {
            Frame frame = JOptionPane.getFrameForComponent(comp);
            dialog = new TableDialog(frame, possibleValues, title);
            
            //XXX: should create new dialog if possibleValues 
            //XXX: isn't the same as before.  Or just change the UI.
        }

        value = newValue;
        dialog.list.setSelectedValue(value, true);
        dialog.setLocationRelativeTo(comp);
        dialog.setVisible(true);
    }

    public static String getValue() {
        return value;
    }

    private TableDialog(Frame frame, Object[] data, String title) {
        super(frame, title, true);

        //buttons
        JButton cancelButton = new JButton("Cancel");
        final JButton setButton = new JButton("Set");
        cancelButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                TableDialog.dialog.setVisible(false);
            }
        });
        setButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                TableDialog.value = (String)(list.getSelectedValue());
                TableDialog.dialog.setVisible(false);
            }
        });

        //main part of the dialog
        list = new JList(data);
        list.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
        list.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                if (e.getClickCount() == 2) {
                    setButton.doClick();
                }
            }
        });
        JScrollPane listScroller = new JScrollPane(list);
        listScroller.setPreferredSize(new Dimension(250, 80));
        //XXX: Must do the following, too, or else the scroller thinks
        //XXX: it's taller than it is:
        listScroller.setMinimumSize(new Dimension(250, 80));
        listScroller.setAlignmentX(LEFT_ALIGNMENT);

        //Create a container so that we can add a title around
        //the scroll pane.  Can't add a title directly to the 
        //scroll pane because its background would be white.
        //Lay out the label and scroll pane from top to button.
        JPanel listPane = new JPanel();
        listPane.setLayout(new BoxLayout(listPane, BoxLayout.Y_AXIS));
        JLabel label = new JLabel("Pick a last name:");
        listPane.add(label);
        listPane.add(Box.createRigidArea(new Dimension(0,5)));
        listPane.add(listScroller);
        listPane.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));

        //Lay out the buttons from left to right.
        JPanel buttonPane = new JPanel();
        buttonPane.setLayout(new BoxLayout(buttonPane, BoxLayout.X_AXIS));
        buttonPane.setBorder(BorderFactory.createEmptyBorder(0, 10, 10, 10));
        buttonPane.add(Box.createHorizontalGlue());
        buttonPane.add(cancelButton);
        buttonPane.add(Box.createRigidArea(new Dimension(10, 0)));
        buttonPane.add(setButton);

        //Put everything together, using the content pane's BorderLayout.
        Container contentPane = getContentPane();
        contentPane.add(listPane, BorderLayout.CENTER);
        contentPane.add(buttonPane, BorderLayout.SOUTH);

        pack();
    }
}