1    
2    /* 
3     * This interpreter is intended to paint different colored dots in a window. 
4     * 
5     * The commands that the interpreter can recognize and respond to are: 
6     *  - BLUE: paint a blue dot 
7     *  - RED: paint a red 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   
18   import painter.SPainter;
19   import shapes.SCircle;
20   
21   public class Interpreter1 {
22   
23       private void interpreter() {
24   
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) { 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("help") ) {
44                   JOptionPane.showMessageDialog(null, "Valid commands are: "
45                           + "RED | BLUE | GREEN | HELP | EXIT ");
46               } else if ( command.equalsIgnoreCase("exit") ) {
47                   miro.end();
48                   System.out.println("Thank you for viewing the dots ...");
49                   break;
50               } else {
51                       JOptionPane.showMessageDialog(null, "Unrecognizable command: "
52                               + command.toUpperCase());
53                   }
54               }
55   
56           }
57   
58           // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
59   
60           public Interpreter1() {
61               interpreter();
62           }
63   
64           public static void main(String[] args) {
65               SwingUtilities.invokeLater(new Runnable() {
66                   public void run() {
67                       new Interpreter1();
68                   }
69               });
70           }
71   
72       }
73   
74