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-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 java.awt.Color;
17   import javax.swing.JOptionPane;
18   import javax.swing.SwingUtilities;
19   import painter.SPainter;
20   import shapes.SCircle;
21   
22   public class Interpreter3 {
23   
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 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       private static 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);
69       }
70   
71       //INFRASTRUCTURE FOR SOME SIMPLE PAINTING
72   
73       public Interpreter3() {
74           interpreter();
75       }
76   
77       public static void main(String[] args) {
78           SwingUtilities.invokeLater(new Runnable() {
79               public void run() {
80                   new Interpreter3();
81               }
82           });
83       }
84   }
85