Pharmacies/src/org/r3pek/pharmacies/widgets/ImageRotater.java

package org.r3pek.pharmacies.widgets;

import java.util.LinkedList;

import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.view.View;

public class ImageRotater implements SensorEventListener {
	private LinkedList<ImageOrientationSensor> images = new LinkedList<ImageOrientationSensor>();
	private float lastOrientation = 0;
	
	public void addImage(ImageOrientationSensor image) {
		synchronized (images) {
			if (images.contains(image)) return;
			images.add(image);
		}
	}
	
	public void delImage(ImageOrientationSensor image) {
		synchronized (images) {
			images.remove(image);
		}
	}
	
	@Override
	public void onAccuracyChanged(Sensor sensor, int accuracy) {
	}
	
	public float getLastOrientation() {
		return lastOrientation;
	}

	@Override
	public void onSensorChanged(SensorEvent event) {
		if (event.sensor.getType() != Sensor.TYPE_ORIENTATION) return;
		if (Math.abs(event.values[0] - lastOrientation) < 5) return;

		lastOrientation = event.values[0];
		synchronized (images) {
			for (ImageOrientationSensor a : images) {
				if (((View)a).isShown())
					a.setOrientation(lastOrientation);
			}
		}
	}
}