1    package NPW;
2    
3    import java.awt.Color;
4    import java.util.Random;
5    import java.util.Scanner;
6    import javax.swing.JOptionPane;
7    import javax.swing.SwingUtilities;
8    import painter.SPainter;
9    import shapes.SSquare;
10   
11       public class Number1 {
12       // The solution to the graphical problem.
13           private void paintTheImage() {
14           // Get the input information from the user.
15           int nrOfRows = getNumber("rows");
16           int nrOfColumns = getNumber("columns");
17           int sizeOfSquare = getNumber("square side length");
18   
19           // Establish the painter.
20           int height = nrOfRows * sizeOfSquare;
21           int width = nrOfColumns * sizeOfSquare;
22           SPainter miro = new SPainter("Number 1",width+50,height+50);
23           miro.setBrushWidth(4);
24           SSquare square = new SSquare(sizeOfSquare);
25   
26           // Paint the rectangles.
27           paintRectangle(miro,square,nrOfRows,nrOfColumns);
28       }
29   
30       private static int getNumber(String prompt) {
31           String nss = JOptionPane.showInputDialog(null,prompt+"?");
32           Scanner scanner = new Scanner(nss);
33           return scanner.nextInt();
34       }
35   
36       private static void paintRectangle(SPainter miro, SSquare square,
37                                          int nrOfRows, int nrOfColumns) {
38           // Position the painter to paint the rectangle of squares.
39           miro.mlt(((nrOfColumns-1)/2.0) * square.side());
40           miro.mbk(((nrOfRows-1)/2.0) * square.side());
41   
42           // Paint the rectangle of squares.
43           int i = 1;
44           while ( i <= nrOfRows) {
45               paintOneRow(miro,nrOfColumns,square);
46               miro.mfd(square.side());
47               i = i + 1;
48           }
49   
50           // Make the method invariant with respect to painter position.
51           miro.mrt(((nrOfColumns-1)/2.0) * square.side());
52           miro.mfd(((nrOfRows-1)/2.0) * square.side());
53       }
54   
55       private static void paintOneRow(SPainter miro, int nrOfColumns, SSquare square) {
56           int i = 1;
57           while ( i <= nrOfColumns ) {
58               paintOneSquare(miro,square);
59               miro.mrt(square.side());
60               i = i + 1;
61           }
62           miro.mlt(nrOfColumns*square.side());
63       }
64   
65       private static void paintOneSquare(SPainter miro, SSquare square) {
66           miro.setColor(randomColor());
67           miro.paint(square);
68           miro.setColor(Color.BLACK);
69           miro.draw(square);
70       }
71       private static Color randomColor() {
72           Random rgen = new Random();
73           int r = rgen.nextInt(256);
74           int g = rgen.nextInt(256);
75           int b = rgen.nextInt(256);
76           return new Color(r,b,g);
77       }
78   
79       public Number1(){
80           paintTheImage();
81       }
82   
83       public static void main(String[] args){
84           SwingUtilities.invokeLater(new Runnable() {
85               @Override
86               public void run() {
87                   new Number1();
88               }
89           });
90       }
91   }