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