// File:  CardLayout1.java

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;

public class CardLayout1 extends Applet implements ActionListener 
{
  private CardLayout cardLayout;
  private Panel cardPanel;
  private Panel controlPanel;
  private List list;
  private Button Buttons,TextFields, Lists;
  
  public void init() 
  { // the north cell of the applet has this controlPanel with 3 buttons
    controlPanel = new Panel();
    controlPanel.setBackground(Color.pink);
    controlPanel.add(Buttons=new Button("Buttons"));
    controlPanel.add(TextFields=new Button("TextFields"));
    controlPanel.add(Lists=new Button("Lists"));
    Buttons.addActionListener(this);
    TextFields.addActionListener(this);
    Lists.addActionListener(this);

    // the center cell of the applet has this cardPanel with 4 panels
    // to show at different times
    cardPanel = new Panel();
    cardLayout = new CardLayout();
    cardPanel.setLayout(cardLayout);

    // this panel is "card 2" in the CardLayout
    Panel buttonsPanel = new Panel();
    // contents are some buttons with no events just to show concept
    buttonsPanel.setBackground(Color.yellow);
    buttonsPanel.add(new Button("Button 1"));
    buttonsPanel.add(new Button("Button 2"));
    buttonsPanel.add(new Button("Button 3"));

    // this panel is "card 3" in the CardLayout (textfields have no events)
    Panel textFieldsPanel = new Panel();
    textFieldsPanel.setBackground(Color.cyan);
    textFieldsPanel.add(new TextField(10));
    String msg = "Please enter your name";
    textFieldsPanel.add(new TextField(msg, 40));

    // this panel is "card 4" in the CardLayout (list has no events)
    Panel listsPanel = new Panel();
    listsPanel.setBackground(Color.magenta);
    list = new List(5, false);
    list.addItem("Hamlet");
    list.addItem("Claudius");
    list.addItem("Gertrude");
    list.addItem("Polonius");
    list.addItem("Horatio");
    list.addItem("Laertes");
    list.addItem("Ophelia");
    list.addItem("Caesar");
    list.addItem("Brutus");
    list.addItem("Alexandrius");
    listsPanel.add(list);

   // this panel is "card 1" in the CardLayout
    Panel welcomePanel = new Panel();
    welcomePanel.setBackground(Color.gray);
    welcomePanel.add(new Label("Welcome to an example of CardLayout"));

    // add the panels to the CardLayout
    cardPanel.add("card 1", welcomePanel);
    cardPanel.add("card 2", buttonsPanel);
    cardPanel.add("card 3", textFieldsPanel);
    cardPanel.add("card 4", listsPanel);

    // layout of the applet
    setLayout(new BorderLayout());
    add("North",controlPanel);
    add("Center",cardPanel);
  }

  public void actionPerformed( ActionEvent e) 
  {
    // respond to the applet buttons by showing different card panels
    if (e.getSource()==Buttons) 
    {
      cardLayout.show(cardPanel, "card 2");
    } 
    else if (e.getSource()==TextFields) 
    {
      cardLayout.show(cardPanel, "card 3");
    }  
    else if (e.getSource()==Lists) 
    {
      cardLayout.show(cardPanel, "card 4");
    }
  }
}