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 colored 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 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("help")) {
43                   JOptionPane.showMessageDialog(null, "Valid commands are: " + "RED | BLUE | GREEN | YELLOW | RANDOM | HELP | EXIT ");
44               } else if (command.equalsIgnoreCase("exit")) {
45                   miro.end();
46                   System.out.println("Thanks you for viewing the dots ...");
47                   break;
48               } else if (command.equalsIgnoreCase("green")) {
49                   miro.setColor(Color.GREEN);
50                   miro.paint(dot);
51               } else if (command.equalsIgnoreCase("yellow")) {
52                   miro.setColor(Color.YELLOW);
53                   miro.paint(dot);
54               } else if (command.equalsIgnoreCase("random")) {
55                   miro.setColor(randomColor());
56                   miro.paint(dot);
57               } else {
58                   JOptionPane.showMessageDialog(null, "Unrecognizable command: " + command.toUpperCase());
59               }
60           }
61       }
62   
63       private static Color randomColor() {
64           int rv = (int) (Math.random()*256);
65           int gv = (int) (Math.random()*256);
66           int bv = (int) (Math.random()*256);
67           return new Color(rv, gv, bv);
68       }
69       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
70   
71       public Interpreter3() {
72           interpreter();
73       }
74   
75       public static void main(String[] args) {
76           SwingUtilities.invokeLater(new Runnable() {
77               public void run() {
78                   new Interpreter3();
79               }
80           });
81       }
82   }