CODEWITHSUNDEEP
javauser-interface
anon
anon

Reputation:

Dispose of a JDialog's child JDialog the next time the parent dialog is shown

I have a parent JDialog opened from button on a JFrame. The parent JDialog itself has a child JDialog that is opened from a button on the parent dialog. When I close the parent dialog and open it again using the button on the frame, I do not want to child dialog to also open.

Is there a way to prevent the child dialog from opening, unless the user explicitly presses on the button on the parent dialog?

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

public class MultiDialog {
    public static void main(String[] args) {
        SwingUtilities.invokeLater(
            new Runnable() {
                public void run() {
                    final JDialog d1 = new JDialog();
                    final JDialog d2 = new JDialog(d1);
                    d1.setDefaultCloseOperation(JDialog.HIDE_ON_CLOSE);
                    d2.setDefaultCloseOperation(JDialog.HIDE_ON_CLOSE);

                    d1.setSize(new Dimension(150, 100));
                    d1.setTitle("Parent");
                    d1.setLocation(50, 50);

                    d2.setTitle("Child");
                    d2.setSize(new Dimension(100, 100));
                    d2.setLocation(150, 150);

                    JFrame f = new JFrame("App");
                    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                    JButton b1 = new JButton("Show Parent Dialog");
                    f.add(b1);
                    b1.addActionListener(new ActionListener() {
                        @Override
                        public void actionPerformed(ActionEvent e) {
                            d1.setVisible(true);
                        }
                    });

                    JButton b2 = new JButton("Show Child Dialog");
                    d1.add(b2);
                    b2.addActionListener(new ActionListener() {
                        @Override
                        public void actionPerformed(ActionEvent e) {
                            d2.setVisible(true);
                        }
                    });

                    f.pack();
                    f.setVisible(true);
                }
            }
        );
    }
}

Upvotes: 2

Views: 1204

Answers (1)

Yassin Hajaj
Yassin Hajaj

Reputation: 22005

Add a WindowListener to your Parent JDialog and use the windowClosing method by overiding it.

From now on, when you're closing the Parent, the Child's visible attribute becomes false until we're clicking on the Parent's button again.

d1.addWindowListener(new WindowAdapter(){
    @Override
    public void windowClosing(WindowEvent arg0) {
        d2.setVisible(false);
    };
});

Full Code

import javax.swing.*;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class MultiDialog {
    public static void main(String[] args) {
        SwingUtilities.invokeLater(
                new Runnable() {
                    public void run() {
                        final JDialog d1 = new JDialog();
                        final JDialog d2 = new JDialog(d1);
                        d1.setDefaultCloseOperation(JDialog.HIDE_ON_CLOSE);
                        d2.setDefaultCloseOperation(JDialog.HIDE_ON_CLOSE);

                        d1.setSize(new Dimension(150, 100));
                        d1.setTitle("Parent");
                        d1.setLocation(50, 50);

                        d2.setTitle("Child");
                        d2.setSize(new Dimension(100, 100));
                        d2.setLocation(150, 150);

                        JFrame f = new JFrame("App");
                        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                        JButton b1 = new JButton("Show Parent Dialog");
                        f.add(b1);
                        b1.addActionListener(new ActionListener() {
                            @Override
                            public void actionPerformed(ActionEvent e) {
                                d1.setVisible(true);
                            }
                        });

                        d1.addWindowListener(new WindowAdapter(){
                            @Override
                            public void windowClosing(WindowEvent arg0) {
                                d2.setVisible(false);
                            };
                        });

                        JButton b2 = new JButton("Show Child Dialog");
                        d1.add(b2);
                        b2.addActionListener(new ActionListener() {
                            @Override
                            public void actionPerformed(ActionEvent e) {
                                d2.setVisible(true);
                            }
                        });

                        f.pack();
                        f.setVisible(true);
                    }
                }
                );
    }
}

Upvotes: 1

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