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     *  - 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   package interpreters;
12   
13   import java.awt.Color;
14   import javax.swing.JOptionPane;
15   import javax.swing.SwingUtilities;
16   import painter.SPainter;
17   import shapes.SCircle;
18   
19   public class Interpreter3 {
20   
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("green") ) {
33                   miro.setColor(Color.GREEN);
34                   miro.paint(dot);
35               } else if ( command.equalsIgnoreCase("yellow") ) {
36                   miro.setColor(Color.YELLOW);
37                   miro.paint(dot);
38               } else if ( command.equalsIgnoreCase("help") ) {
39                   JOptionPane.showMessageDialog(null,"Valid commands are: " + "GREEN | YELLOW | RANDOM | HELP | EXIT ");
40               } else if ( command.equalsIgnoreCase("random") ) {
41                   miro.setColor(randomColor());
42                   miro.paint(dot);
43               } else if ( command.equalsIgnoreCase("exit") ) {
44                   miro.end();
45                   System.out.println("Thank you for viewing the dots ...");
46                   break;
47               } else {
48                   JOptionPane.showMessageDialog(null, "Unrecognizable command: " + command.toUpperCase());
49               }
50           }
51       }
52   
53       private Color randomColor() {
54           int rv = (int)(Math.random()*256);
55           int gv = (int)(Math.random()*256);
56           int bv = (int)(Math.random()*256);
57           return new Color(rv,gv,bv);
58       }
59   
60       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
61   
62       public Interpreter3() {
63           interpreter();
64       }
65   
66       public static void main(String[] args) {
67           SwingUtilities.invokeLater(new Runnable() {
68               public void run() {
69                   new Interpreter3();
70               }
71           });
72       }
73   }