SampleProgress.java Source code

Introduction

Here is the source code for SampleProgress.java

Source

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

import java.awt.Component;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.ProgressMonitor;
import javax.swing.Timer;

public class SampleProgress {
    static ProgressMonitor monitor;

    static int progress;

    static Timer timer;

    static class ProgressMonitorHandler implements ActionListener {
        // Called by Timer
        public void actionPerformed(ActionEvent actionEvent) {
            if (monitor == null)
                return;
            if (monitor.isCanceled()) {
                System.out.println("Monitor canceled");
                timer.stop();
            } else {
                progress += 3;
                monitor.setProgress(progress);
                monitor.setNote("Loaded " + progress + " files");
            }
        }
    }

    public static void main(String args[]) {

        JFrame frame = new JFrame("ProgressMonitor Sample");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Container contentPane = frame.getContentPane();
        contentPane.setLayout(new GridLayout(0, 1));

        // Define Start Button
        JButton startButton = new JButton("Start");
        ActionListener startActionListener = new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                Component parent = (Component) actionEvent.getSource();
                monitor = new ProgressMonitor(parent, "Loading Progress", "Getting Started...", 0, 200);
                progress = 0;
            }
        };
        startButton.addActionListener(startActionListener);
        contentPane.add(startButton);

        // Define Manual Increase Button
        // Pressing this button increases progress by 5
        JButton increaseButton = new JButton("Manual Increase");
        ActionListener increaseActionListener = new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                if (monitor == null)
                    return;
                if (monitor.isCanceled()) {
                    System.out.println("Monitor canceled");
                } else {
                    progress += 5;
                    monitor.setProgress(progress);
                    monitor.setNote("Loaded " + progress + " files");
                }
            }
        };
        increaseButton.addActionListener(increaseActionListener);
        contentPane.add(increaseButton);

        // Define Automatic Increase Button
        // Start Timer to increase progress by 3 every 250 ms
        JButton autoIncreaseButton = new JButton("Automatic Increase");
        ActionListener autoIncreaseActionListener = new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                if (monitor != null) {
                    if (timer == null) {
                        timer = new Timer(250, new ProgressMonitorHandler());
                    }
                    timer.start();
                }
            }
        };
        autoIncreaseButton.addActionListener(autoIncreaseActionListener);
        contentPane.add(autoIncreaseButton);

        frame.setSize(300, 200);
        frame.setVisible(true);
    }
}