CODEWITHSUNDEEP
javaswingactionlistenerjtabbedpanechangelistener
mainstringargs
mainstringargs

Reputation: 14381

JTabbedPane trigger event

I want to trigger an event whenever the "+" tab is clicked (and no other tabs present). Basically, I want the "+" tab to act like a button. I'm not quite sure which type of listener to use. How can I do this?

import java.awt.Dimension;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class JTPTest extends JTabbedPane {



    public JTPTest() {

        this.addChangeListener(new ChangeListener() {

            public void stateChanged(ChangeEvent changeEvent) {
                System.out.println(changeEvent);
            }

        });

        JPanel blankJPanel = new JPanel();
        this.addTab("+", blankJPanel);

    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                JFrame frame = new JFrame();
                frame.add(new JTPTest());

                frame.setSize(500, 500);
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);

            }
        });

    }
}

Upvotes: 0

Views: 1353

Answers (2)

414v32
414v32

Reputation: 562

Try: 

JPanel blankJPanel1 = new JPanel();
this.addTab("+", blankJPanel1);

setModel(new DefaultSingleSelectionModel() {

    @Override
    public void setSelectedIndex(int index) {
        System.out.println("woah!");
    }
});

Update

Just an alternative version, without the need of modifying the model behavior.

JPanel blankJPanel = new JPanel();
this.addTab("dummy text", blankJPanel);

JLabel label = new JLabel("x");
label.setBorder(BorderFactory.createEmptyBorder(0, 10, 0, 10));
label.addMouseListener(new MouseAdapter() {
    @Override
    public void mouseClicked(MouseEvent e) {
        System.out.println("woah!!");
    }
});


setTabComponentAt(indexOfComponent(blankJPanel), label);

Update 2 Seems I end up doing something similar to this answer, please refer to it as the "best" solution to this problem.

Upvotes: 1

camickr
camickr

Reputation: 324128

Read the section from the Swing tutorial on How to Use Tabbed Panes.

One of the examples shows how to add a "Close" button to a tab. You should be able to easily modify the code to add a "+" button.

Upvotes: 2

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