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Java Source | 2000-05-25 | 3.6 KB | 99 lines |
- //: CardLayout1.java
- //////////////////////////////////////////////////
- // Copyright (c) Bruce Eckel, 1998
- // Source code file from the book "Thinking in Java"
- // All rights reserved EXCEPT as allowed by the
- // following statements: You can freely use this file
- // for your own work (personal or commercial),
- // including modifications and distribution in
- // executable form only. Permission is granted to use
- // this file in classroom situations, including its
- // use in presentation materials, as long as the book
- // "Thinking in Java" is cited as the source.
- // Except in classroom situations, you cannot copy
- // and distribute this code; instead, the sole
- // distribution point is http://www.BruceEckel.com
- // (and official mirror sites) where it is
- // freely available. You cannot remove this
- // copyright and notice. You cannot distribute
- // modified versions of the source code in this
- // package. You cannot use this file in printed
- // media without the express permission of the
- // author. Bruce Eckel makes no representation about
- // the suitability of this software for any purpose.
- // It is provided "as is" without express or implied
- // warranty of any kind, including any implied
- // warranty of merchantability, fitness for a
- // particular purpose or non-infringement. The entire
- // risk as to the quality and performance of the
- // software is with you. Bruce Eckel and the
- // publisher shall not be liable for any damages
- // suffered by you or any third party as a result of
- // using or distributing software. In no event will
- // Bruce Eckel or the publisher be liable for any
- // lost revenue, profit, or data, or for direct,
- // indirect, special, consequential, incidental, or
- // punitive damages, however caused and regardless of
- // the theory of liability, arising out of the use of
- // or inability to use software, even if Bruce Eckel
- // and the publisher have been advised of the
- // possibility of such damages. Should the software
- // prove defective, you assume the cost of all
- // necessary servicing, repair, or correction. If you
- // think you've found an error, please email all
- // modified files with clearly commented changes to:
- // Bruce@EckelObjects.com. (Please use the same
- // address for non-code errors found in the book.)
- /////////////////////////////////////////////////
-
- // Demonstrating the CardLayout
- import java.awt.*;
- import java.applet.Applet;
-
- class ButtonPanel extends Panel {
- ButtonPanel(String id) {
- setLayout(new BorderLayout());
- add("Center", new Button(id));
- }
- }
-
- public class CardLayout1 extends Applet {
- Button
- first = new Button("First"),
- second = new Button("Second"),
- third = new Button("Third");
- Panel cards = new Panel();
- CardLayout cl = new CardLayout();
- public void init() {
- setLayout(new BorderLayout());
- Panel p = new Panel();
- p.setLayout(new FlowLayout());
- p.add(first);
- p.add(second);
- p.add(third);
- add("North", p);
- cards.setLayout(cl);
- cards.add("First card",
- new ButtonPanel("The first one"));
- cards.add("Second card",
- new ButtonPanel("The second one"));
- cards.add("Third card",
- new ButtonPanel("The third one"));
- add("Center", cards);
- }
- public boolean action(Event evt, Object arg) {
- if (evt.target.equals(first)) {
- cl.first(cards);
- }
- else if (evt.target.equals(second)) {
- cl.first(cards);
- cl.next(cards);
- }
- else if (evt.target.equals(third)) {
- cl.last(cards);
- }
- else
- return super.action(evt, arg);
- return true;
- }
- } ///:~