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: paints a randomly colored 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   class Interpreters3 {
23       private void interpreter() {
24           //CREATE OBJECTS TO THINK WITH
25           SPainter miro = new SPainter("Dot Thing", 400, 400);
26           miro.setScreenLocation(0, 0);
27           SCircle dot = new SCircle(180);
28   
29           //REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET
30           while (true) {
31               String command = JOptionPane.showInputDialog(null, "Command?");
32               if (command == null) {
33                   command = "exit";
34               } //user clicked on Cancel
35               if (command.equalsIgnoreCase("blue") ) {
36                   miro.setColor(Color.BLUE);
37                   miro.paint(dot);
38               } else if (command.equalsIgnoreCase("red") ) {
39                   miro.setColor(Color.RED);
40                   miro.paint(dot);
41               } else if (command.equalsIgnoreCase("green") ) {
42                   miro.setColor(Color.GREEN);
43                   miro.paint(dot);
44               } else if (command.equalsIgnoreCase("yellow") ) {
45                   miro.setColor(Color.YELLOW);
46                   miro.paint(dot);
47               } else if (command.equalsIgnoreCase("random") ) {
48                   miro.setColor(randomColor());
49                   miro.paint(dot);
50               } else if (command.equalsIgnoreCase("help") ) {
51                   JOptionPane.showMessageDialog(null, "Valid commands are:"
52                           + "RED | BLUE | GREEN | YELLOW | RANDOM | HELP | EXIT ");
53               } else if (command.equalsIgnoreCase("exit")) {
54                   miro.end();
55                   System.out.println("Thank you for viewing the dots ...");
56                   break;
57               } else {
58                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
59                           + command.toUpperCase());
60               }
61           }
62       }
63   
64           //INFRASTRUCTURE FOR SOME SIMPLE PAINTING
65   
66       public Interpreters3() {
67           interpreter();
68       }
69   
70       private static Color randomColor() {
71           int rv = (int) (Math.random() * 256);
72           int gv = (int) (Math.random() * 256);
73           int bv = (int) (Math.random() * 256);
74           return new Color(rv, gv, bv);
75       }
76   
77       public static void main(String[] args) {
78           SwingUtilities.invokeLater(new Runnable() {
79               ;
80               public void run () {
81                   new Interpreters3();
82               }
83           });
84       }
85   }
86