Lists and Forms - Beginning J2ME: From Novice to Professional - page 83

private Form mGaugeForm;
private Command mUpdateCommand, mIdleCommand;
private Gauge mInteractiveGauge;
private Gauge mIncrementalGauge;
private Gauge mContinuousGauge;
public GaugeMIDlet() {
mGaugeForm = new Form("Gauges");
mInteractiveGauge = new Gauge("Interactive", true, 5, 2);
mInteractiveGauge.setLayout(Item.LAYOUT_2);
mGaugeForm.append(mInteractiveGauge);
mContinuousGauge = new Gauge("Non-I continuous", false,
Gauge.INDEFINITE, Gauge.CONTINUOUS_RUNNING);
mContinuousGauge.setLayout(Item.LAYOUT_2);
mGaugeForm.append(mContinuousGauge);
mIncrementalGauge = new Gauge("Non-I incremental", false,
Gauge.INDEFINITE, Gauge.INCREMENTAL_UPDATING);
mIncrementalGauge.setLayout(Item.LAYOUT_2);
mGaugeForm.append(mIncrementalGauge);
mUpdateCommand = new Command("Update", Command.SCREEN, 0);
mIdleCommand = new Command("Idle", Command.SCREEN, 0);
Command exitCommand = new Command("Exit", Command.EXIT, 0);
mGaugeForm.addCommand(mUpdateCommand);
mGaugeForm.addCommand(mIdleCommand);
mGaugeForm.addCommand(exitCommand);
mGaugeForm.setCommandListener(this);
}
public void startApp() {
if (mDisplay == null) mDisplay = Display.getDisplay(this);
mDisplay.setCurrent(mGaugeForm);
}
public void pauseApp() {}
public void destroyApp(boolean unconditional) {}
public void commandAction(Command c, Displayable s) {
if (c.getCommandType() == Command.EXIT)
notifyDestroyed();
else if (c == mUpdateCommand) {
mContinuousGauge.setValue(Gauge.CONTINUOUS_RUNNING);
mIncrementalGauge.setValue(Gauge.INCREMENTAL_UPDATING);
}