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/*
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);
}
}
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