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patterns/observer/currentconditionsdisplay.d

34 lines
789 B
D

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