1    /* 
2     * This interpreter is intended to paint different color 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: paints a random color 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 painter.SPainter;
17   import shapes.SCircle;
18   
19   import javax.swing.*;
20   import java.awt.*;
21   
22   public class Interpreter3 {
23   
24       private void interpreter() {
25           //Create objects 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 ) { command = "exit"; } // 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: " + "RED | BLUE | GREEN | YELLOW | RANDOM | HELP | EXIT ");
51               } else if ( command.equalsIgnoreCase("exit")) {
52                   miro.end();
53                   System.out.println("Thank You for viewing the dots ...");
54                   break;
55               } else {
56                   JOptionPane.showMessageDialog(null, "Unrecognizable command: " + command.toUpperCase());
57               }
58           }
59       }
60   
61       private static Color randomColor() {
62           int rv = (int)(Math.random()*256);
63           int gv = (int)(Math.random()*256);
64           int bv = (int)(Math.random()*256);
65           return new Color(rv,gv,bv);
66       }
67   
68       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
69   
70       public Interpreter3() {
71           interpreter();
72       }
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