package jp.gr.java_conf.skrb.prefs;

import java.util.prefs.*;
import javax.swing.*;
import javax.swing.border.*;
import java.awt.*;
import java.awt.event.*;

public class PrefsGUISample1 {
    protected Preferences prefs;

    protected static final String LOCATION_X = "locationX";
    protected static final String LOCATION_Y = "locationY";
    protected static final String WIDTH = "width";
    protected static final String HEIGHT = "height";

    protected int locationX;
    protected int locationY;
    protected int width;
    protected int height;

    protected JLabel labelLocationX;
    protected JLabel labelLocationY;
    protected JLabel labelWidth;
    protected JLabel labelHeight;

    protected JFrame frame;

    public PrefsGUISample1(){
        prefs = Preferences.userNodeForPackage(this.getClass());

        loadPrefs();
        
        frame = new JFrame("Preferences GUI Sample");
        frame.addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent event){
                savePrefs();
                System.exit(0);
            }
        });

        frame.setBounds(locationX, locationY, width, height);

        initFrame();
        frame.setVisible(true);
    }

    protected void initFrame(){
        Container pane = frame.getContentPane();

	JPanel panel = new JPanel();
	panel.setBorder(new EmptyBorder(10, 10, 10, 10));
	panel.setLayout(new GridLayout(0, 2));

        JLabel label = new JLabel("Location X:");
        panel.add(label);

        labelLocationX = new JLabel(String.valueOf(locationX), SwingConstants.RIGHT);
        panel.add(labelLocationX);

        label = new JLabel("Location Y:");
        panel.add(label);

        labelLocationY = new JLabel(String.valueOf(locationY), SwingConstants.RIGHT);
        panel.add(labelLocationY);

        label = new JLabel("Width:");
        panel.add(label);

        labelWidth = new JLabel(String.valueOf(width), SwingConstants.RIGHT);
        panel.add(labelWidth);

        label = new JLabel("Height:");
        panel.add(label);

        labelHeight = new JLabel(String.valueOf(height), SwingConstants.RIGHT);
        panel.add(labelHeight);

	pane.add(panel, BorderLayout.CENTER);

        JButton button = new JButton("Exit");
        button.addActionListener(new ActionListener(){
	    public void actionPerformed(ActionEvent event){
		savePrefs();
		System.exit(0);
	    }
	});
        pane.add(button, BorderLayout.SOUTH);
    }
        
    protected void loadPrefs(){
        locationX = prefs.getInt(LOCATION_X, 0);
        locationY = prefs.getInt(LOCATION_Y, 0);
        width = prefs.getInt(WIDTH, 100);
        height = prefs.getInt(HEIGHT, 400);
    }

    protected void savePrefs(){
	Rectangle rect = frame.getBounds();
	prefs.putInt(LOCATION_X, rect.x);
	prefs.putInt(LOCATION_Y, rect.y);
	prefs.putInt(WIDTH, rect.width);
	prefs.putInt(HEIGHT, rect.height);
    }

    public static void main(String[] args){
        new PrefsGUISample1();
    }
}