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patterns/observer/delivery/currentconditionsdisplay.d

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module observer.delivery.currentconditionsdisplay;
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import observer.delivery.displayelement;
import observer.delivery.observer;
import observer.delivery.weatherdata;
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import std.stdio : writeln;
import std.format : format;
class CurrentConditionsDisplay : Observer, DisplayElement
{
private:
float temperature;
float humidity;
public:
this(WeatherData weatherData)
{
weatherData.registerObserver(this);
}
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override void update(float temperature, float humidity, float pressure)
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{
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this.temperature = temperature;
this.humidity = humidity;
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display();
}
override void display()
{
writeln("Current conditions: %3.1f".format(temperature), "F degrees and %3.1f%% humidity".format(humidity));
}
}