画胖小人和瘦小人，建造者模式版本

  1 abstract class PersonBuilder
  2     {
  3         protected Graphics g;
  4         protected Pen p;
  5         
  6         public PersonBuilder(Graphics g, Pen p)
  7         {
  8             this.g = g;
  9             this.p = p;
 10         }
 11         
 12         public abstract void BuildHead();
 13         public abstract void BuildBody();
 14         public abstract void BuildArmLeft();
 15         public abstract void BuildArmRight();
 16         public abstract void BuildLegLeft();
 17         public abstract void BuildLegRight();
 18     }
 19     
 20     class PersonThinBuilder : PersonBuilder
 21     {
 22         public PersonThinBuilder(Graphics g, Pen p) : base(g, p)
 23         {}
 24         
 25         public override void BuildHead()
 26         {
 27             g.DrawEllipse(p, 50, 20, 30, 30);
 28         }
 29         
 30         public override void BuildBody()
 31         {
 32             g.DrawRectangle(p, 60, 50, 10, 50);
 33         }
 34         
 35         public override void BuildArmLeft()
 36         {
 37             g.DrawLine(p, 60, 50, 40, 100);
 38         }
 39         
 40         public override void BuildArmRight()
 41         {
 42             g.DrawLine(p, 70, 50, 90, 100);
 43         }
 44         
 45         public override void BuildLegLeft()
 46         {
 47             g.DrawLine(p, 60, 100, 45, 150);
 48         }
 49         
 50         public override void BuildLegRight()
 51         {
 52             g.DrawLine(p, 70, 100, 85, 150);
 53         }
 54     }
 55     
 56     class PersonFatBuilder : PersonBuilder
 57     {
 58         public PersonFatBuilder(Graphics g, Pen p) : base(g, p)
 59         {}
 60         
 61         public override void BuildHead()
 62         {
 63             g.DrawEllipse(p, 150, 20, 30, 30);
 64         }
 65         
 66         public override void BuildBody()
 67         {
 68             g.DrawEllipse(p, 145, 50, 40, 50);
 69         }
 70         
 71         public override void BuildArmLeft()
 72         {
 73             g.DrawLine(p, 150, 50, 130, 100);
 74         }
 75         
 76         public override void BuildArmRight()
 77         {
 78             g.DrawLine(p, 180, 50, 200, 100);
 79         }
 80         
 81         public override void BuildLegLeft()
 82         {
 83             g.DrawLine(p, 160, 100, 145, 150);
 84         }
 85         
 86         public override void BuildLegRight()
 87         {
 88             g.DrawLine(p, 170, 100, 185, 150);
 89         }
 90     }
 91     
 92     class PersonDirector
 93     {
 94         private PersonBuilder pb;
 95         public PersonDirector(PersonBuilder pb)
 96         {
 97             this.pb = pb;
 98         }
 99         public void CreatePerson()
100         {
101             pb.BuildHead();
102             pb.BuildBody();
103             pb.BuildArmLeft();
104             pb.BuildArmRight();
105             pb.BuildLegLeft();
106             pb.BuildLegRight();
107         }
108     }

 1     void Button1Click(object sender, EventArgs e)
 2         {
 3             Pen p = new Pen(Color.OliveDrab);
 4             PersonThinBuilder ptb = new PersonThinBuilder(pictureBox1.CreateGraphics(), p);
 5             PersonDirector pdThin = new PersonDirector(ptb);
 6             pdThin.CreatePerson();
 7         }
 8         void Button2Click(object sender, System.EventArgs e)
 9         {
10             Pen p = new Pen(Color.Moccasin);
11             PersonFatBuilder pfb = new PersonFatBuilder(pictureBox1.CreateGraphics(), p);
12             PersonDirector pdFat = new PersonDirector(pfb);
13             pdFat.CreatePerson();
14             
15         }