CreateColorSamplePopup.java Source code

Introduction

Here is the source code for CreateColorSamplePopup.java

Source

/*
Definitive Guide to Swing for Java 2, Second Edition
By John Zukowski       
ISBN: 1-893115-78-X
Publisher: APress
*/

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;

public class CreateColorSamplePopup {

    public static void main(String args[]) {
        JFrame frame = new JFrame("JColorChooser Create Popup Sample");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Container contentPane = frame.getContentPane();

        final JButton button = new JButton("Pick to Change Background");

        ActionListener actionListener = new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                Color initialBackground = button.getBackground();

                final JColorChooser colorChooser = new JColorChooser(initialBackground);
                //        colorChooser.setPreviewPanel(new JPanel());
                final JLabel previewLabel = new JLabel("I Love Swing", JLabel.CENTER);
                previewLabel.setFont(new Font("Serif", Font.BOLD | Font.ITALIC, 48));
                colorChooser.setPreviewPanel(previewLabel);
                // Bug workaround
                colorChooser.updateUI();

                // For okay button selection, change button background to
                // selected color
                ActionListener okActionListener = new ActionListener() {
                    public void actionPerformed(ActionEvent actionEvent) {
                        Color newColor = colorChooser.getColor();
                        if (newColor.equals(button.getForeground())) {
                            System.out.println("Color change rejected");
                        } else {
                            button.setBackground(colorChooser.getColor());
                        }
                    }
                };

                // For cancel button selection, change button background to red
                ActionListener cancelActionListener = new ActionListener() {
                    public void actionPerformed(ActionEvent actionEvent) {
                        button.setBackground(Color.red);
                    }
                };

                final JDialog dialog = JColorChooser.createDialog(null, "Change Button Background", true,
                        colorChooser, okActionListener, cancelActionListener);

                // Wait until current event dispatching completes before showing
                // dialog
                Runnable showDialog = new Runnable() {
                    public void run() {
                        dialog.show();
                    }
                };
                SwingUtilities.invokeLater(showDialog);
            }
        };
        button.addActionListener(actionListener);
        contentPane.add(button, BorderLayout.CENTER);

        frame.setSize(300, 100);
        frame.setVisible(true);
    }
}