Java Developer's Companion/Java Developer's Companion.iso/documentation/tutorial/intl/datamgmt/example-1.1/IntlWindow.java

Java Source | 1997-07-13 | 5.5 KB | 197 lines

/*
 * Copyright (c) 1995-1997 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL purposes and without
 * fee is hereby granted provided that this copyright notice
 * appears in all copies. Please refer to the file "copyright.html"
 * for further important copyright and licensing information.
 *
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 */
import java.awt.*;
import java.awt.event.*;
import java.util.Locale;

import java.applet.Applet;
import java.net.URL;
import java.awt.image.ImageProducer;
import java.awt.Toolkit;

public class IntlWindow extends Frame implements WindowListener {
    Applet parentApplet = null;

    Panel cards;

    private Locale currentLocale;
    private Locale[] supportedLocales = {
    Locale.US,
    Locale.FRANCE,
    Locale.UK
    };

    private Image[] flags;
    private FlagCanvas[] flagCanvases;
    private int selectedFlag = -1;

    private Image[] soundImages;
    private String[] soundNames = { "book", "car", "dog", "apple" };

    private Font defaultFont;
    private Font boldFont;

    public IntlWindow(Applet parentApplet) {

    currentLocale = getLocale();

    for (int i = 0; i < supportedLocales.length; i++) {
        if (currentLocale == supportedLocales[i])
        selectedFlag = i;
    }

    if (selectedFlag == -1) {
        currentLocale = supportedLocales[0];
        selectedFlag = 0;
    }

    this.parentApplet = parentApplet;
    createGUIElements();
    addWindowListener(this);
    }


    public static void main(String[] args) {
        IntlWindow window = new IntlWindow(null);

        window.pack();
        window.show();
    }

    public void selectFlag(FlagCanvas f) {
    for (int i = 0; i < flagCanvases.length; i++) {
        if (f == flagCanvases[i]) {
        selectedFlag = i;
        flagCanvases[i].setSelected(true);
        } else
            flagCanvases[i].setSelected(false);
    }
    currentLocale = supportedLocales[selectedFlag];
    ((CardLayout)cards.getLayout()).show(cards, currentLocale.getDisplayName());
    doLayout();
    }

    public void windowClosed(WindowEvent event) {
    }

    public void windowDeiconified(WindowEvent event) {
    }

    public void windowIconified(WindowEvent event) {
    }

    public void windowActivated(WindowEvent event) {
    }

    public void windowDeactivated(WindowEvent event) {
    }

    public void windowOpened(WindowEvent event) {
    }

    public void windowClosing(WindowEvent event) {
        if (parentApplet != null) {
            dispose();
        } else {
            System.exit(0);
        }
    }

    private void createGUIElements() {
        defaultFont = new Font("Helvetica", Font.PLAIN, 14);
        boldFont = new Font(defaultFont.getName(), Font.BOLD,
                         defaultFont.getSize());
        setFont(defaultFont);

    // load the images that are shared between all of the linguaPanels
    // first the flags
    MediaTracker tracker = new MediaTracker(this);
    flags = new Image[supportedLocales.length];
    flagCanvases = new FlagCanvas[supportedLocales.length];
    for (int i = 0; i < supportedLocales.length; i++) {
        String s = "flag_" + supportedLocales[i].toString() + ".gif";
        try {
            URL url = getClass().getResource(s);
        flags[i] = Toolkit.getDefaultToolkit().getImage(url);
        } catch (Exception e) {
        System.err.println("Couldn't load flag image: " + s);
        e.printStackTrace();
        }

        tracker.addImage(flags[i], i);
    }

    // then the sound images
    soundImages = new Image[soundNames.length];
    for (int i = 0; i < soundNames.length; i++) {
        String s = soundNames[i] + ".gif";
        try {
            URL url = getClass().getResource(s);
        soundImages[i] = Toolkit.getDefaultToolkit().getImage(url);
        } catch (Exception e) {
        System.err.println("Couldn't load sound image: " + s);
        e.printStackTrace();
        }
        tracker.addImage(soundImages[i], i + supportedLocales.length);
    }

    // wait for all of the images to be loaded
        try {
            tracker.waitForAll();
        } catch (InterruptedException e) {
        System.err.println("exception from tracker");
        e.printStackTrace();
    }


    // now add the flag images to this window
    Panel p = new Panel();
    p.setLayout(new FlowLayout());
    for (int i = 0; i < flags.length; i++) {
       flagCanvases[i] = new FlagCanvas(flags[i],
            this,
            flags[i].getWidth(this),
            flags[i].getHeight(this));
       p.add(flagCanvases[i]);
    }
    flagCanvases[selectedFlag].setSelected(true);
    add("North", p);

    // create a card panel
    cards = new Panel();
    cards.setLayout(new CardLayout());

    // create the LinguaPanels that go into the card layout
    for (int i = 0; i < supportedLocales.length; i ++) {
        LinguaPanel linguaPanel = null;
        try {
        linguaPanel = new LinguaPanel(supportedLocales[i], parentApplet,
                                  defaultFont, boldFont, soundImages, soundNames);
        } catch (java.util.MissingResourceException e) {
        System.err.println("Couldn't create a LinguaPanel for " + supportedLocales[i]);
        System.err.println(e);
        }

        // add it to the card layout
        cards.add(supportedLocales[i].getDisplayName(), linguaPanel);
    }

    // add the card layout to this window
    add("Center", cards);
    }
}