/*
 * TabDemo.java requires no other files.  It's like CardLayoutDemo,
 * but it uses a JTabbedPane instead of a GUI centered around
 * CardLayout.
 */

import java.awt.*;
import javax.swing.*;

public class TabDemo {
    final static String BUTTONPANEL = "JPanel with JButtons";
    final static String TEXTPANEL = "JPanel with JTextField";

    public void addComponentToPane(Container pane) {
        JTabbedPane tabbedPane = new JTabbedPane();

        //Create the "cards".
        JPanel card1 = new JPanel() {
            //Make the panel wider than it really needs, so
            //the window's wide enough for the tabs to stay
            //in one row.
            public Dimension getPreferredSize() {
                Dimension size = super.getPreferredSize();
                size.width += 100;
                return size;
            }
        };
        card1.add(new JButton("Button 1"));
        card1.add(new JButton("Button 2"));
        card1.add(new JButton("Button 3"));

        JPanel card2 = new JPanel();
        card2.add(new JTextField("TextField", 20));

        tabbedPane.addTab(BUTTONPANEL, card1);
        tabbedPane.addTab(TEXTPANEL, card2);

        pane.add(tabbedPane, BorderLayout.CENTER);
    }

    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("TabDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Create and set up the content pane.
        TabDemo demo = new TabDemo();
        demo.addComponentToPane(frame.getContentPane());

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}
