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Java Source | 1998-12-01 | 4.5 KB | 148 lines |
- /*
- * @(#)SimpleExample.java 1.22 98/08/26
- *
- * Copyright 1997, 1998 by Sun Microsystems, Inc.,
- * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
- * All rights reserved.
- *
- * This software is the confidential and proprietary information
- * of Sun Microsystems, Inc. ("Confidential Information"). You
- * shall not disclose such Confidential Information and shall use
- * it only in accordance with the terms of the license agreement
- * you entered into with Sun.
- */
-
- import java.awt.*;
- import java.awt.event.*;
- import javax.swing.*;
-
- /**
- * An application that displays a JButton and several JRadioButtons.
- * The JRadioButtons determine the look and feel used by the application.
- */
- public class SimpleExample extends JPanel {
- static JFrame frame;
-
- static String metal= "Metal";
- static String metalClassName = "javax.swing.plaf.metal.MetalLookAndFeel";
-
- static String motif = "Motif";
- static String motifClassName =
- "com.sun.java.swing.plaf.motif.MotifLookAndFeel";
-
- static String windows = "Windows";
- static String windowsClassName =
- "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
-
- JRadioButton metalButton, motifButton, windowsButton;
-
- public SimpleExample() {
- // Create the buttons.
- JButton button = new JButton("Hello, world");
- button.setMnemonic('h'); //for looks only; button does nada
-
- metalButton = new JRadioButton(metal);
- metalButton.setMnemonic('o');
- metalButton.setActionCommand(metalClassName);
-
- motifButton = new JRadioButton(motif);
- motifButton.setMnemonic('m');
- motifButton.setActionCommand(motifClassName);
-
- windowsButton = new JRadioButton(windows);
- windowsButton.setMnemonic('w');
- windowsButton.setActionCommand(windowsClassName);
-
- // Group the radio buttons.
- ButtonGroup group = new ButtonGroup();
- group.add(metalButton);
- group.add(motifButton);
- group.add(windowsButton);
-
- // Register a listener for the radio buttons.
- RadioListener myListener = new RadioListener();
- metalButton.addActionListener(myListener);
- motifButton.addActionListener(myListener);
- windowsButton.addActionListener(myListener);
-
- add(button);
- add(metalButton);
- add(motifButton);
- add(windowsButton);
- }
-
-
- /** An ActionListener that listens to the radio buttons. */
- class RadioListener implements ActionListener {
- public void actionPerformed(ActionEvent e) {
- String lnfName = e.getActionCommand();
-
- try {
- UIManager.setLookAndFeel(lnfName);
- SwingUtilities.updateComponentTreeUI(frame);
- frame.pack();
- }
- catch (Exception exc) {
- JRadioButton button = (JRadioButton)e.getSource();
- button.setEnabled(false);
- updateState();
- System.err.println("Could not load LookAndFeel: " + lnfName);
- }
-
- }
- }
-
- public void updateState() {
- String lnfName = UIManager.getLookAndFeel().getClass().getName();
- if (lnfName.indexOf(metal) >= 0) {
- metalButton.setSelected(true);
- } else if (lnfName.indexOf(windows) >= 0) {
- windowsButton.setSelected(true);
- } else if (lnfName.indexOf(motif) >= 0) {
- motifButton.setSelected(true);
- } else {
- System.err.println("SimpleExample is using an unknown L&F: " + lnfName);
- }
- }
-
- public static void main(String s[]) {
- /*
- NOTE: By default, the look and feel will be set to the
- Cross Platform Look and Feel (which is currently Metal).
- The user may someday be able to override the default
- via a system property. If you as the developer want to
- be sure that a particular L&F is set, you can do so
- by calling UIManager.setLookAndFeel(). For example, the
- first code snippet below forcibly sets the UI to be the
- System Look and Feel. The second code snippet forcibly
- sets the look and feel to the Cross Platform L&F.
-
- Snippet 1:
- try {
- UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
- } catch (Exception exc) {
- System.err.println("Error loading L&F: " + exc);
- }
-
- Snippet 2:
- try {
- UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
- } catch (Exception exc) {
- System.err.println("Error loading L&F: " + exc);
- }
- */
-
- SimpleExample panel = new SimpleExample();
-
- frame = new JFrame("SimpleExample");
- frame.addWindowListener(new WindowAdapter() {
- public void windowClosing(WindowEvent e) {System.exit(0);}
- });
- frame.getContentPane().add("Center", panel);
- frame.pack();
- frame.setVisible(true);
-
- panel.updateState();
- }
- }
-