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 color 
10    * -Help: show a list of the commands in a dialog message box 
11    * -Exit: terminate the program 
12    */
13   package interpreters;
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   
22       private void interpreter() {
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) {
32                   command = "exit";
33               } // user clicked on Cancel
34               if (command.equalsIgnoreCase("blue")) {
35                   miro.setColor(Color.BLUE);
36                   miro.paint(dot);
37               } else if (command.equalsIgnoreCase("red")) {
38                   miro.setColor(Color.RED);
39                   miro.paint(dot);
40               }  else if (command.equalsIgnoreCase("green")) {
41                   miro.setColor(Color.GREEN);
42                   miro.paint(dot);
43               }  else if (command.equalsIgnoreCase("yellow")) {
44                   miro.setColor(Color.YELLOW);
45                   miro.paint(dot);
46               }  else if ( command.equalsIgnoreCase("random") ) {
47                   miro.setColor(randomColor());
48                   miro.paint(dot);
49               } else if (command.equalsIgnoreCase("help")) {
50                   JOptionPane.showMessageDialog(null, "Valid commands are: "
51                           + "RED | BLUE | GREEN | YELLOW | RANDOM | HELP | EXIT");
52               } else if (command.equalsIgnoreCase("exit")) {
53                   miro.end();
54                   System.out.println("Thank you for viewing the dots...");
55                   break;
56               } else {
57                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
58                           + command.toUpperCase());
59               }
60           }
61       }
62   
63       private 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   
70       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
71       public Interpreter3() {
72           interpreter();
73       }
74       public static void main(String[] args) {
75           SwingUtilities.invokeLater(new Runnable() {
76               public void run() {
77                   new Interpreter3();
78               }
79           });
80       }
81   }
82