95 lines
2.6 KiB
C#
95 lines
2.6 KiB
C#
using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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namespace Tutorial_5
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{
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public partial class WeatherData : Form, ISubject
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{
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List<IWeatherObserver> observers;
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public void DeregisterObserver(IWeatherObserver observer)
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{
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if (observers.Contains(observer)) observers.Remove(observer);
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else Console.Error.WriteLine("{0} does not exist in the observers list.", observer.ToString());
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}
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/// <summary>
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/// 'Push' method
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/// </summary>
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public void NotifyObservers()
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{
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double t = GetTemperature();
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double h = GetHumidity();
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double p = GetPressure();
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foreach (var observer in observers)
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{
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observer.Update(t, h, p);
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}
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}
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public void RegisterObserver(IWeatherObserver observer)
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{
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if (observers.Contains(observer)) Console.Error.WriteLine("{0} already exists in the observers list.", observer.ToString());
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else observers.Add(observer);
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}
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public double GetTemperature()
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{
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return TemperatureSlider.Value;
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}
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public double GetHumidity()
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{
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return HumiditySlider.Value;
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}
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public double GetPressure()
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{
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return PressureSlider.Value;
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}
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void MeasurementChanged()
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{
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NotifyObservers();
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}
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public WeatherData()
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{
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InitializeComponent();
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observers = new List<IWeatherObserver>();
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}
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private void Form1_Load(object sender, EventArgs e)
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{
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}
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/// <summary>
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/// Analagous to the Update() method in Excercise 1
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/// Pushes data to observers via Subject.NotifyObservers
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/// </summary>
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/// <param name="sender"></param>
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/// <param name="e"></param>
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private void SliderChanged(object sender, EventArgs e)
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{
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NotifyObservers();
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TemperatureLabel.Text = TemperatureSlider.Value.ToString() + " ℃";
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HumidityLabel.Text = HumiditySlider.Value.ToString() + " %";
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PressureLabel.Text = PressureSlider.Value.ToString() + " kPa";
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}
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private void Form1_Load_1(object sender, EventArgs e)
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{
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CurrentConditionsDisplay ccd = new CurrentConditionsDisplay(this);
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ccd.Show();
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}
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}
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}
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