1    /* 
2     * A variant of program Number3. 
3     * Program to paint dots of the named color, or black dots should the user type in something other than the three specified color names. 
4     */
5    package npw;
6    
7    import java.awt.Color;
8    import java.util.Random;
9    import java.util.Scanner;
10   import javax.swing.JOptionPane;
11   import javax.swing.SwingUtilities;
12   
13   import painter.SPainter;
14   import shapes.SCircle;
15   
16   public class Number4 {
17       // The solution to the graphical problem.
18       private void paintTheImage() {
19           // Get the input information from the user.
20           int nrOfRows = getNumber("rows");
21           int nrOfColumns = getNumber("columns");
22           int sizeOfCircle = getNumber("Color side length");
23           String colorOfCircle = getColor ("Color of Circles");
24           //Establish the painter.
25           int height = nrOfRows * sizeOfCircle;
26           int width = nrOfColumns * sizeOfCircle;
27           SPainter miro = new SPainter("Number 3", width + 50, height + 50);
28           miro.setBrushWidth(4);
29           SCircle circle = new SCircle (sizeOfCircle);
30           //Paint the rectangles.
31           paintRectangle(miro, circle, nrOfRows, nrOfColumns, colorOfCircle);
32       }
33   
34       private String getColor(String prompt) {
35           String nss = JOptionPane.showInputDialog(null,prompt+"?");
36           Scanner scanner = new Scanner(nss);
37           return scanner.nextLine();
38       }
39   
40       private int getNumber(String prompt) {
41           String nss = JOptionPane.showInputDialog(null,prompt+"?");
42           Scanner scanner = new Scanner(nss);
43           return scanner.nextInt();
44       }
45   
46       private static void paintRectangle(SPainter miro, SCircle circle, int nrOfRows, int nrOfColumns, String colorOfCircle) {
47           // Position the painter to paint the rectangle of squares.
48           miro.mlt(((nrOfColumns - 1) / 2.0) * circle.diameter());
49           miro.mbk(((nrOfRows - 1) / 2.0) * circle.diameter());
50           //Paint the rectangle of squares.
51           int i = 1;
52           while (i <= nrOfRows) {
53               paintOneRow(miro, nrOfColumns, circle, colorOfCircle);
54               miro.mfd(circle.diameter());
55               i = i + 1;
56           }
57           //Make the method invariant with respect to painter position.
58           miro.mrt(((nrOfColumns - 1) / 2.0) * circle.diameter());
59           miro.mfd(((nrOfRows - 1) / 2.0) * circle.diameter());
60       }
61   
62       private static void paintOneRow(SPainter miro, int nrOfColumns, SCircle circle, String colorOfCircle) {
63           int i = 1;
64           while (i <= nrOfColumns) {
65               paintOneCircle(miro,circle,colorOfCircle);
66               miro.mrt(circle.diameter());
67               i = i + 1;
68           }
69           miro.mlt(nrOfColumns * circle.diameter());
70       }
71   
72       private static void paintOneCircle(SPainter miro, SCircle circle, String colorOfCircle) {
73           circle.s2();
74           if (colorOfCircle.equalsIgnoreCase("RED")){
75               miro.setColor(Color.RED);
76               miro.paint(circle);
77           }
78           else if (colorOfCircle.equalsIgnoreCase("BLUE")){
79               miro.setColor(Color.BLUE);
80               miro.paint(circle);
81           }
82           else if (colorOfCircle.equalsIgnoreCase("GREEN")){
83               miro.setColor(Color.GREEN);
84               miro.paint(circle);
85           }
86           else {
87               miro.setColor(Color.BLACK);
88               miro.paint(circle);
89           }
90           circle.x2();
91   
92       }
93   
94       private static Color randomColor() {
95           Random rgen = new Random();
96           int r = rgen.nextInt(256);
97           int g = rgen.nextInt(256);
98           int b = rgen.nextInt(256);
99           return new Color(r, b, g);
100      }
101  
102      public Number4(){
103          paintTheImage();
104      }
105  
106      public static void main(String[] args){
107          SwingUtilities.invokeLater(new Runnable() {
108              @Override
109              public void run() {
110                  new Number4();
111              }
112          });
113  
114      }
115  }
116