package org.gcd.test;

import android.app.Activity;
import android.os.Bundle;
import android.hardware.SensorEventListener;
import android.hardware.SensorEvent;
import android.hardware.SensorManager;
import android.hardware.Sensor;
import android.view.SurfaceView;
import android.view.SurfaceHolder;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Color;
import java.util.List;

public class Proximity extends Activity implements SensorEventListener {
    private SensorManager sensorManager;
    private TestView view;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
	sensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
	view = new TestView(this);
	setContentView(view);
    }

    @Override
    protected void onResume() {
	super.onResume();
	List<Sensor> sensors
	    = sensorManager.getSensorList(Sensor.TYPE_PROXIMITY);
	if (sensors.size() == 0) return;
	Sensor sensor = sensors.get(0);
	sensorManager.registerListener(this, sensor,
				       SensorManager.SENSOR_DELAY_NORMAL);
    }

    @Override
    protected void onPause() {
	super.onPause();
	sensorManager.unregisterListener(this);
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
	view.update(event.values);
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {
    }

    class TestView extends SurfaceView {
	public TestView(Context context) {
	    super(context);
	}

	void update(float[] values) {
	    Canvas canvas = getHolder().lockCanvas();
	    if (canvas == null) return;
	    canvas.drawColor(Color.WHITE);
	    Paint paint = new Paint();
	    paint.setColor(Color.BLACK);
	    paint.setTextSize(40);
	    float height = paint.getTextSize();
	    for (int i = 0; i < values.length; i++) {
		canvas.drawText(" "+values[i], 0, height * (i + 1), paint);
	    }
	    getHolder().unlockCanvasAndPost(canvas);
	}
    }
}