003 --- 第6章 装饰模式

 1 // 抽象对象基类
 2 class CComponent
 3 {
 4 public:
 5     virtual void Operation() = 0;
 6 };
 7 
 8 // 具体对象类
 9 class CConcreteComponent : public CComponent
10 {
11 public:
12     virtual void Operation()
13     {
14         cout << "具体对象的操作" << endl;
15     }
16 };
17 
18 // 抽象装饰类
19 class CDecorator : public CComponent
20 {
21 protected:
22     CComponent* m_pComponent;
23 
24 public:
25     CDecorator() : m_pComponent(NULL) {};
26 
27     void SetComponent(CComponent* pComponent)
28     {
29         m_pComponent = pComponent;
30     }
31 
32     virtual void Operation()
33     {
34         if (m_pComponent != NULL)
35         {
36             m_pComponent->Operation();
37         }
38     }
39 };
40 
41 // 具体装饰类
42 class CConcreteDecDecoratorA : public CDecorator
43 {
44 private:
45     string m_AddedState;
46 
47 public:
48     virtual void Operation()
49     {
50         CDecorator::Operation();
51         m_AddedState = "New State";
52         cout << "具体装饰对象A的操作" << endl;
53     }
54 };
55 
56 // 具体装饰类
57 class CConcreteDecDecoratorB : public CDecorator
58 {
59 public:
60     virtual void Operation()
61     {
62         CDecorator::Operation();
63         AddedBehavior();
64         cout << "具体装饰对象B的操作" << endl;
65     }
66 
67 private:
68     void AddedBehavior()
69     {
70         cout << "具体装饰对象B新增的行为" << endl;
71     }
72 };
73 
74 int main()
75 {
76     CConcreteComponent ConcreteComponent;
77     CConcreteDecDecoratorA ConcreteDecDecoratorA;
78     CConcreteDecDecoratorB ConcreteDecDecoratorB;
79 
80     ConcreteDecDecoratorA.SetComponent(&ConcreteComponent);
81     ConcreteDecDecoratorB.SetComponent(&ConcreteDecDecoratorA);
82     ConcreteDecDecoratorB.Operation();
83 
84     system("pause");
85     return 0;
86 }

  1 // 人的类(具体对象类，本例不需要抽象对象基类)
  2 class CPerson
  3 {
  4 private:
  5     string m_szName;
  6 
  7 public:
  8     CPerson(){}
  9 
 10     CPerson(string szName)
 11     {
 12         m_szName = szName;
 13     }
 14 
 15     virtual void Show()
 16     {
 17         string str = "装扮的[" + m_szName + "]";
 18         cout << str << endl;
 19     }
 20 };
 21 
 22 // 服装抽象类(抽象装饰类，继承自具体对象类)
 23 class CFinery : public CPerson
 24 {
 25 protected:
 26     CPerson* m_pComponent;
 27 
 28 public:
 29     void Decorate(CPerson* pComponent)
 30     {
 31         m_pComponent = pComponent;
 32     }
 33     virtual void Show()
 34     {
 35         if (m_pComponent)
 36             m_pComponent->Show();
 37     }
 38 };
 39 
 40 // 具体服饰类
 41 // 大T恤类（具体装饰类，继承自抽象装饰类）
 42 class CTShirts : public CFinery
 43 {
 44 public:
 45     virtual void Show()
 46     {
 47         cout << "大T恤 ";
 48         CFinery::Show();
 49     }
 50 };
 51 
 52 // 垮裤类（具体装饰类，继承自抽象装饰类）
 53 class CBigTrouser : public CFinery
 54 {
 55 public:
 56     virtual void Show()
 57     {
 58         cout << "垮裤 ";
 59         CFinery::Show();
 60     }
 61 };
 62 
 63 // 破球鞋类（具体装饰类，继承自抽象装饰类）
 64 class CSneakers : public CFinery
 65 {
 66 public:
 67     virtual void Show()
 68     {
 69         cout << "破球鞋 ";
 70         CFinery::Show();
 71     }
 72 };
 73 
 74 // 西装类（具体装饰类，继承自抽象装饰类）
 75 class CSuit : public CFinery
 76 {
 77 public:
 78     virtual void Show()
 79     {
 80         cout << "西装 ";
 81         CFinery::Show();
 82     }
 83 };
 84 
 85 // 领带类（具体装饰类，继承自抽象装饰类）
 86 class CTie : public CFinery
 87 {
 88 public:
 89     virtual void Show()
 90     {
 91         cout << "领带 ";
 92         CFinery::Show();
 93     }
 94 };
 95 
 96 // 皮鞋类（具体装饰类，继承自抽象装饰类）
 97 class CLeatherShoes : public CFinery
 98 {
 99 public:
100     virtual void Show()
101     {
102         cout << "皮鞋 ";
103         CFinery::Show();
104     }
105 };
106 
107 int main()
108 {
109     CPerson Person("GHL");
110 
111     cout << "第一种装扮：" << endl;
112     CSneakers Sneakers;
113     CBigTrouser BigTrouser;
114     CTShirts TShirts;
115     Sneakers.Decorate(&Person);
116     BigTrouser.Decorate(&Sneakers);
117     TShirts.Decorate(&BigTrouser);
118     TShirts.Show();
119 
120     cout << "第二种装扮：" << endl;
121     CLeatherShoes LeatherShoes;
122     CTie Tie;
123     CSuit Suit;
124     LeatherShoes.Decorate(&Person);
125     Tie.Decorate(&LeatherShoes);
126     Suit.Decorate(&Tie);
127     Suit.Show();
128 
129     system("pause");
130     return 0;
131 }