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     *  - HELP: show a list of commands in a dialog 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   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) { command = "exit"; } // user clicked on Cancel
34               if (command.equalsIgnoreCase("blue")) {
35                   miro.setColor(Color.BLUE);
36                   miro.paint(dot);
37   
38               } else if (command.equalsIgnoreCase("red")) {
39                   miro.setColor(Color.RED);
40                   miro.paint(dot);
41               } else if (command.equalsIgnoreCase("green")) {
42                   miro.setColor(Color.GREEN);
43                   miro.paint(dot);
44               } else if (command.equalsIgnoreCase("yellow")) {
45                   miro.setColor(Color.YELLOW);
46                   miro.paint(dot);
47               } else if (command.equalsIgnoreCase("random")) {
48                   miro.setColor(randomColor());
49                   miro.paint(dot);
50               }
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               @Override
81               public void run() {
82                   new Interpreter3();
83               }
84           });
85   
86       }
87   }
88