监听者模式

1 namespaceDesignModeTest
2 {
3 classProgram
4 {
5 static void Main(string[] args)
6 {
7 WeatherInfoClass weatherInfo = newWeatherInfoClass();
8 TemperatureClass temperatureTips = newTemperatureClass();
9 HumClass humTips = newHumClass();
10 WeatherClass weatherTips = newWeatherClass();
11 
12 weatherInfo.AddObserver(temperatureTips);
13 weatherInfo.AddObserver(humTips);
14 weatherInfo.AddObserver(weatherTips);
15 
16 weatherInfo.Updata(10, 1, WeatherType.Cloudy);
17 weatherInfo.Updata(30, 2, WeatherType.Sun);
18 weatherInfo.Updata(1, 1, WeatherType.Rain);
19 
20 }
21 
22 enumWeatherType
23 {
24 Sun = 1,//晴
25 Cloudy = 2,//阴
26 Rain = 3//雨
27 }
28 interfaceMySubject //被监听者需要有的
29 {
30 voidAddObserver(MyObserver obj);
31 voidChangeData();
32 voidRemoveObserver(MyObserver obj);
33 }
34 /// <summary>
35 ///可监听者
36 /// </summary>
37 classWeatherInfoClass : MySubject
38 {
39 private const int LimitTemperature = 20;
40 private int mTemperature;//温度
41 private int mHum;//湿度
42 privateWeatherType mWeather;
43 
44 private List<MyObserver> mObserverList = new List<MyObserver>();
45 
46 #region 监听者拉pull数据需要
47 public intGetTemperature()
48 {
49 returnmTemperature;
50 }
51 
52 public intGetHum()
53 {
54 returnmHum;
55 }
56 
57 publicWeatherType GetWeather()
58 {
59 returnmWeather;
60 }
61 #endregion
62 
63 private boolIsChange()
64 {
65 if (mTemperature <LimitTemperature)
66 {
67 return true;
68 }
69 return false;
70 }
71 
72 public void Updata(int temperature, inthum, WeatherType weathertype)
73 {
74 mTemperature =temperature;
75 mHum =hum;
76 mWeather =weathertype;
77 
78 if(IsChange())
79 {
80 ChangeData();
81 }
82 }
83 
84 
85 public voidAddObserver(MyObserver obj)
86 {
87 if (!mObserverList.Contains(obj))
88 {
89 mObserverList.Add(obj);
90 }
91 }
92 
93 public voidChangeData()
94 {
95 for (int i = 0; i < mObserverList.Count; ++i)
96 {
97 mObserverList[i].Update(this);
98 }
99 }
100 public voidRemoveObserver(MyObserver obj)
101 {
102 mObserverList.Remove(obj);
103 }
104 
105 }
106 
107 
108 interfaceMyObserver
109 {
110 voidUpdate(MySubject subject);
111 voidDisplay();
112 }
113 
114 classTemperatureClass : MyObserver
115 {
116 private intmTemperature;
117 private intmHum;
118 
119 public voidUpdate(MySubject subject)
120 {
121 WeatherInfoClass info = subject asWeatherInfoClass;
122 if (info != null)
123 {
124 mTemperature =info.GetTemperature();
125 mHum =info.GetHum();
126 Display();
127 }
128 }
129 
130 public voidDisplay()
131 {
132 Console.WriteLine("TemperatureClass 温度：" + mTemperature + "湿度：" +mHum);
133 }
134 }
135 
136 classHumClass : MyObserver
137 {
138 private intmHum;
139 public voidUpdate(MySubject subject)
140 {
141 WeatherInfoClass info = subject asWeatherInfoClass;
142 if (info != null)
143 {
144 mHum =info.GetHum();
145 Display();
146 }
147 }
148 
149 public voidDisplay()
150 {
151 Console.WriteLine("HumClass 湿度：" +mHum);
152 }
153 }
154 
155 classWeatherClass : MyObserver
156 {
157 privateWeatherType mWeatherType;
158 public voidUpdate(MySubject subject)
159 {
160 WeatherInfoClass info = subject asWeatherInfoClass;
161 if (info != null)
162 {
163 mWeatherType =info.GetWeather();
164 
165 Display();
166 }
167 }
168 
169 public voidDisplay()
170 {
171 Console.WriteLine("WeatherClass 天气：" +mWeatherType);
172 }
173 }
174 
175 }
176 }
177