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