1    /* 
2     * This interpreter is intended to paint different colored dots in a window. 
3     * 
4     * The commands that the interpreter can recognize and respond to are: 
5     * - BLUE: paint a blue dot 
6     * - RED: paint a red dot 
7     * - GREEN: paint a green dot 
8     * - YELLOW: paint a yellow dot 
9     * - RANDOM: paints a random color 
10    * - HELP: show a list of the commands in a dialog message box 
11    * - EXIT: terminate the program 
12    */
13   
14   
15   package interpreters;
16   
17   import java.awt.Color;
18   import javax.swing.JOptionPane;
19   import javax.swing.SwingUtilities;
20   import painter.SPainter;
21   import shapes.SCircle;
22   
23   public class Interpreter3
24   {
25       private void interpreter()
26       {
27           // CREATE OBJECTS TO THINK WITH
28           SPainter miro = new SPainter("Dot Thing", 400, 400);
29           miro.setScreenLocation(0,0);
30           SCircle dot = new SCircle(180);
31   
32           // REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT
33           while(true)
34           {
35               String command = JOptionPane.showInputDialog(null, "Command?");
36               if(command == null){ command = "exit";} // user clicked on Cancel
37               if (command.equalsIgnoreCase("blue")) {
38                   miro.setColor(Color.BLUE);
39                   miro.paint(dot);
40               }
41               else if (command.equalsIgnoreCase("red"))
42               {
43                   miro.setColor(Color.RED);
44                   miro.paint(dot);
45               }
46               else if (command.equalsIgnoreCase("green"))
47               {
48                   miro.setColor(Color.GREEN);
49                   miro.paint(dot);
50               }
51               else if (command.equalsIgnoreCase("yellow"))
52               {
53                   miro.setColor(Color.YELLOW);
54                   miro.paint(dot);
55               }
56               else if (command.equalsIgnoreCase("random"))
57               {
58                   miro.setColor(randomColor());
59                   miro.paint(dot);
60               }
61               else if (command.equalsIgnoreCase("help"))
62               {
63                   JOptionPane.showMessageDialog(null, "Valid commands are: " + "RED | BLUE | GREEN | YELLOW | RANDOM | HELP | EXIT ");
64               }
65               else if (command.equalsIgnoreCase("exit"))
66               {
67                   miro.end();
68                   System.out.println("Thank you for viewing the dots ...");
69                   break;
70               }
71               else
72               {
73                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
74                           + command.toUpperCase());
75               }
76   
77           }
78       }
79   
80       private static Color randomColor() {
81           int rv = (int)(Math.random()*256);
82           int gv = (int)(Math.random()*256);
83           int bv = (int)(Math.random()*256);
84           return new Color(rv, gv, bv);
85       }
86   
87       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
88   
89       public Interpreter3()
90       {
91           interpreter();
92       }
93   
94       public static void main(String[] args)
95       {
96           SwingUtilities.invokeLater(new Runnable() {
97               public void run() {
98                   new Interpreter3();
99               }
100          });
101      }
102  }
103