package PatternObserver.Weather;

/** Demo file, it may not be correct and/or complete.
 * Please watch the corresponding lecture(s) for more explanations.
 * @author ashesh
 */
public class DisplayUSA implements Observer {
	Subject subject;
	double temperatureC = 0.0;
	double humidity = 0.0;

	@Override
	public void update(Subject obj) {
		if (obj instanceof Thermometer) {
			update((Thermometer) obj);
		} else if (obj instanceof Hygrometer) {
			update((Hygrometer) obj);
		}
	}

	public void update(Thermometer obj) {
		this.temperatureC = obj.getTemperatureC();
		displayTemperature();
	}

	public void update(Hygrometer obj) {
		this.humidity = obj.getHumidity();
		displayHumidity();
	}

	public void display() {
		System.out.printf("From DisplayUSA: Temperature is %.2f F, "
				+ "Humidity is %.2f\n", convertToF(), humidity);
	}

	public void displayTemperature() {
		System.out.printf("From DisplayUSA: Temperature is %.2f F\n",
				convertToF());
	}

	public void displayHumidity() {
		System.out.printf("From DisplayUSA: Humidity is %.2f\n", humidity);
	}

	public double convertToF() {
		return (temperatureC * (9.0 / 5.0) + 32);
	}
}