import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Gauge;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
public class J2MEGaugeNonInteractive extends MIDlet implements CommandListener {
private Display display;
private Form form;
private Command exit;
private Command start;
private Gauge gauge;
private boolean isSafeToExit;
public J2MEGaugeNonInteractive() {
display = Display.getDisplay(this);
gauge = new Gauge("Progress Tracking", false, 100, 0);
exit = new Command("Exit", Command.EXIT, 1);
start = new Command("Start", Command.SCREEN, 1);
form = new Form("");
form.append(gauge);
form.addCommand(start);
form.addCommand(exit);
form.setCommandListener(this);
isSafeToExit = true;
}
public void startApp() {
display.setCurrent(form);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) throws MIDletStateChangeException {
}
public void commandAction(Command command, Displayable displayable) {
if (command == exit) {
try {
destroyApp(isSafeToExit);
notifyDestroyed();
} catch (MIDletStateChangeException Error) {
Alert alert = new Alert("Busy", "Please try again.", null, AlertType.WARNING);
alert.setTimeout(1500);
display.setCurrent(alert, form);
}
} else if (command == start) {
form.removeCommand(start);
new Thread(new GaugeUpdater()).start();
}
}
class GaugeUpdater implements Runnable {
public void run() {
isSafeToExit = false;
try {
while (gauge.getValue() < gauge.getMaxValue()) {
Thread.sleep(1000);
gauge.setValue(gauge.getValue() + 1);
}
isSafeToExit = true;
gauge.setLabel("Process Completed.");
} catch (InterruptedException Error) {
throw new RuntimeException(Error.getMessage());
}
}
}
}