package org.jboss.errai.ui.cordova;
import javax.enterprise.event.Event;
import javax.inject.Inject;
import javax.inject.Singleton;
import org.jboss.errai.ioc.client.api.AfterInitialization;
import org.jboss.errai.orientation.client.local.OrientationDetector;
import org.jboss.errai.orientation.client.shared.OrientationEvent;
import com.google.gwt.user.client.Window;
import com.googlecode.gwtphonegap.client.accelerometer.Acceleration;
import com.googlecode.gwtphonegap.client.accelerometer.AccelerationCallback;
import com.googlecode.gwtphonegap.client.accelerometer.AccelerationOptions;
import com.googlecode.gwtphonegap.client.accelerometer.Accelerometer;
import com.googlecode.gwtphonegap.client.accelerometer.AccelerometerWatcher;
/**
* Detects device orientation through the PhoneGap API, periodically firing CDI
* events with the latest orientation info.
*
* @author Jonathan Fuerth <jfuerth@gmail.com>
*/
@Cordova
@Singleton
public class PhoneGapOrientationDetector implements OrientationDetector {
@Inject
Accelerometer accelerometer;
@Inject // @Ongoing
Event<OrientationEvent> event;
private AccelerometerWatcher watcher;
private Event<OrientationEvent> orientationEventSource;
@AfterInitialization
public void init() {
setOrientationEventSource(event);
startFiringOrientationEvents();
}
@Override
public void startFiringOrientationEvents() {
watcher = accelerometer.watchAcceleration(new AccelerationOptions(), new AccelerationCallback() {
@Override
public void onSuccess(Acceleration acceleration) {
fireOrientationEvent(acceleration.getX(), acceleration.getY(), acceleration.getZ());
}
@Override
public void onFailure() {
//TODO really handle failure like this?
Window.alert("Accelerometer not supported");
}
});
}
public void fireOrientationEvent(double x, double y, double z) {
orientationEventSource.fire(new OrientationEvent(x, y, z));
}
@Override
public void setOrientationEventSource(Event<OrientationEvent> orientationEventSource) {
this.orientationEventSource = orientationEventSource;
}
@Override
public void stopFiringOrientationEvents() {
if (watcher != null) {
accelerometer.clearWatch(watcher);
}
}
}