/*
* Swing version.
*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/*
* A template for animation applications.
*/
public class AnimatorApplicationTimer extends JFrame
implements ActionListener {
int frameNumber = -1;
Timer timer;
boolean frozen = false;
JLabel label;
AnimatorApplicationTimer(int fps, String windowTitle) {
super(windowTitle);
int delay = (fps > 0) ? (1000 / fps) : 100;
//Set up a timer that calls this object's action handler.
timer = new Timer(delay, this);
timer.setInitialDelay(0);
timer.setCoalesce(true);
addWindowListener(new WindowAdapter() {
public void windowIconified(WindowEvent e) {
stopAnimation();
}
public void windowDeiconified(WindowEvent e) {
startAnimation();
}
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
label = new JLabel("Frame ", JLabel.CENTER);
label.addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
if (frozen) {
frozen = false;
startAnimation();
} else {
frozen = true;
stopAnimation();
}
}
});
getContentPane().add(label, BorderLayout.CENTER);
}
//Can be invoked by any thread (since timer is thread-safe).
public void startAnimation() {
if (frozen) {
//Do nothing. The user has requested that we
//stop changing the image.
} else {
//Start animating!
if (!timer.isRunning()) {
timer.start();
}
}
}
//Can be invoked by any thread (since timer is thread-safe).
public void stopAnimation() {
//Stop the animating thread.
if (timer.isRunning()) {
timer.stop();
}
}
public void actionPerformed(ActionEvent e) {
//Advance the animation frame.
frameNumber++;
label.setText("Frame " + frameNumber);
}
public static void main(String args[]) {
AnimatorApplicationTimer animator = null;
int fps = 10;
//Get frames per second from the command line argument.
if (args.length > 0) {
try {
fps = Integer.parseInt(args[0]);
} catch (Exception e) {}
}
animator = new AnimatorApplicationTimer(fps, "Animator with Timer");
animator.pack();
animator.setVisible(true);
//It's OK to start the animation here because
//startAnimation can be invoked by any thread.
animator.startAnimation();
}
}
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