1    /* 
2     * The commands that the interpreter can recognize and respond to are: 
3     * - BLUE: paint a blue dot 
4     * - RED: paint a red dot 
5     * - GREEN: paint a green dot 
6     * - YELLOW: paint a yellow dot 
7     * - RANDOM: paint a random colored dot 
8     * - HELP: show a list of the commands in a dialog message box 
9     * - EXIT: terminate the program 
10    */
11   
12   package interpreters;
13   
14   import java.awt.Color;
15   import javax.swing.JOptionPane;
16   import javax.swing.SwingUtilities;
17   import painter.SPainter;
18   import shapes.SCircle;
19   
20   public class Interpreter3 {
21       private void interpreter() {
22   
23           // CREATE OBJECTS TO THINK WITH
24           SPainter miro = new SPainter("Dot Thing",400,400);
25           miro.setScreenLocation(0,0);
26           SCircle dot = new SCircle(180);
27   
28           // REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT
29           while ( true ) {
30               String command = JOptionPane.showInputDialog(null, "Command");
31               if ( command == null ) { command = "exit"; } // user clicked on Cancel
32               if ( command.equalsIgnoreCase("blue") ) {
33                   miro.setColor(Color.BLUE);
34                   miro.paint(dot);
35               } else if (command.equalsIgnoreCase("red") ) {
36                   miro.setColor(Color.RED);
37                   miro.paint(dot);
38               } else if (command.equalsIgnoreCase("green") ) {
39                   miro.setColor(Color.GREEN);
40                   miro.paint(dot);
41               } else if (command.equalsIgnoreCase("yellow") ) {
42                   miro.setColor(Color.YELLOW);
43                   miro.paint(dot);
44               } else if (command.equalsIgnoreCase("random") ) {
45                   miro.setColor(randomColor());
46                   miro.paint(dot);
47               } else if ( command.equalsIgnoreCase("help") ) {
48                   JOptionPane.showMessageDialog(null,"Valid commands are: "
49                           + "RED | BLUE | GREEN | YELLOW | RANDOM | HELP | EXIT ");
50               } else if ( command.equalsIgnoreCase("exit") ) {
51                   miro.end();
52                   System.out.println("Thank you for viewing the dots ...");
53                   break;
54               } else {
55                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
56                           + command.toUpperCase());
57               }
58           }
59   
60       }
61   
62       private static Color randomColor() {
63           int rv = (int)(Math.random()*256);
64           int gv = (int)(Math.random()*256);
65           int bv = (int)(Math.random()*256);
66           return new Color(rv,gv,bv);
67       }
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   }