Navigating between multiple panels

问题

Can anyone tell me how to go about coding for navigation between multiple JPanel classes taking the event trigger from JButton from the objects (panels) themselves? I have read about CardLayout. The panel can be swapped from the events happening in the parent panel. What I want to achieve is on click of a button embedded in the panel, it should should disappear or a desired panel should be displayed. Can't seem to find a solution.

回答1:

There is nothing about CardLayout that prevents switching cards from actions of children within the cards.

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

public class Testing extends JFrame {

    private JPanel cardHolder;
    private CardLayout cards;
    private static final String cardA = "A";
    private static final String cardB = "B";

    private class Switcher implements ActionListener{
        String card;        
        Switcher(String card) { this.card = card; }
        @Override
        public void actionPerformed(ActionEvent e) {
            cards.show(cardHolder, card);
        }
    }

    private void run() {
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        JPanel pa = new JPanel();
        JButton ba = new JButton("Switch to B");
        ba.addActionListener(new Switcher(cardB));
        pa.add(ba);
        pa.setBackground(Color.CYAN);

        JPanel pb = new JPanel();
        JButton bb = new JButton("Switch to A");
        bb.addActionListener(new Switcher(cardA));
        pb.add(bb);
        pb.setBackground(Color.MAGENTA);

        cardHolder = new JPanel();
        cards = new CardLayout();
        cardHolder.setLayout(cards);
        cardHolder.add(pa, cardA);
        cardHolder.add(pb, cardB);
        add(cardHolder);
        pack();
        setVisible(true);
    }

    public static void main(String[] args) {
        try {
            SwingUtilities.invokeAndWait(new Runnable() {
                @Override
                public void run() {
                    new testing().run();
                }
            });
        } catch (Exception ex) { }
    }
}

回答2:

You can use JMenu with JMenuItems instead of to use the JButton for switching betweens Cards

来源：https://stackoverflow.com/questions/10901352/navigating-between-multiple-panels

标签

java

swing

awt

jpanel

cardlayout