Gauge Interactive : Gauge « J2ME « Java Tutorial

1. Java Tutorial
2. J2ME
3. Gauge

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;

public class J2MEGaugeInteractive extends MIDlet implements CommandListener {
  private Display display;

  private Form form;

  private Command exit;

  private Command vote;

  private Gauge gauge;

  public J2MEGaugeInteractive() {
    display = Display.getDisplay(this);
    gauge = new Gauge("Rate the movie: ", true, 5, 1);
    exit = new Command("Exit", Command.EXIT, 1);
    vote = new Command("Vote", Command.SCREEN, 1);
    form = new Form("");
    form.addCommand(exit);
    form.addCommand(vote);
    form.append(gauge);
    form.setCommandListener(this);
  }

  public void startApp() {
    display.setCurrent(form);
  }

  public void pauseApp() {
  }

  public void destroyApp(boolean unconditional) {
  }

  public void commandAction(Command command, Displayable displayable) {
    if (command == exit) {
      destroyApp(false);
      notifyDestroyed();
    } else if (command == vote) {
      String msg = String.valueOf(gauge.getValue());
      Alert alert = new Alert("Ranking", msg, null, null);
      alert.setTimeout(Alert.FOREVER);
      alert.setType(AlertType.INFO);
      display.setCurrent(alert);
    }
  }
}

31.15.Gauge
	31.15.1.	Add Gauge to a form
	31.15.2.	Use active and inactive Gauge
	31.15.3.	new Gauge(null, false, 100, 50)
	31.15.4.	Gauge Tracker
	31.15.5.	Gauge Non Interactive
	31.15.6.	Gauge Interactive