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 dot 
10    * - HELP: show a list of the commands in a dialog message box 
11    * - EXIT: terminate the program 
12    */
13   package interpreters;
14   
15   // IMPORTS
16   
17   import painter.SPainter;
18   import shapes.SCircle;
19   
20   import javax.swing.*;
21   import java.awt.*;
22   
23   public class Interpreter3 {
24       private void interpreter() {
25   
26   // CREATE OBJECTS TO THINK WITH
27           SPainter miro = new SPainter("Dot Thing",400,400);
28           miro.setScreenLocation(0,0);
29           SCircle dot = new SCircle(180);
30   
31   // REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT
32           while ( true ) {
33               String command = JOptionPane.showInputDialog(null,"Command?");
34               if ( command == null ) { command = "exit"; } // USER CLICKED 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("random") ) {
42                   miro.setColor(randomColor());
43                   miro.paint(dot);
44               } else if ( command.equalsIgnoreCase("green") ) {
45                   miro.setColor(Color.GREEN);
46                   miro.paint(dot);
47               } else  if ( command.equalsIgnoreCase("yellow") ) {
48                   miro.setColor(Color.YELLOW);
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 ..."); //EXIT MESSAGE
56                   break;
57               } else {
58                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
59                                   + command.toUpperCase());
60               }
61           }
62       }
63       //STUB FOR RANDOM COLOR
64       private Color randomColor() {
65           int rv = (int)(Math.random() * 256);
66           int gv = (int)(Math.random() * 256);
67           int bv = (int)(Math.random() * 256);
68           return new Color(rv, gv, bv); //RETURN METHOD
69       }
70   
71       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
72       public Interpreter3() {
73           interpreter();
74       }
75       public static void main(String[] args) {
76           SwingUtilities.invokeLater(new Runnable() {
77               public void run() {
78                   new Interpreter3();
79               }
80           });
81       }
82   }
83