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 dot with a random color 
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 java.awt.Color;
17   import javax.swing.JOptionPane;
18   import javax.swing.SwingUtilities;
19   import painter.SPainter;
20   import shapes.SCircle;
21   
22   public class Interpreter3 {
23   
24       private void interpreter() {
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("help")) {
49                   JOptionPane.showMessageDialog(null, "Valid commands are: "
50                           + "RED | BLUE | GREEN| YELLOW| HELP | RANDOM | EXIT ");
51               } else if (command.equalsIgnoreCase("random")){
52                   miro.setColor(randomColor());
53                   miro.paint(dot);
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, bv, gv);
70       }
71       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
72   
73       public Interpreter3() {
74           interpreter();
75       }
76   
77       public static void main(String[] args) {
78           SwingUtilities.invokeLater(new Runnable() {
79               public void run() {
80                   new Interpreter3();
81               }
82           });
83       }
84   }