1 /*
  2  * Program to paint a rectangle, centered in the canvas, made up of randomly 
  3  * colored, black framed squares.
  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 import painter.SPainter;
 13 import shapes.SSquare;
 14 
 15 /**
 16  *
 17  * @author evankemp
 18  */
 19 public class Number1 {
 20 
 21     // REQUIRED INFRASTRUCTURE
 22     /**
 23      * @param args the command line arguments
 24      */
 25     public static void main(String[] args) {
 26         SwingUtilities.invokeLater(new Runnable() {
 27             public void run() {
 28                 new Number1();
 29             }
 30         });
 31     }
 32 
 33     public Number1() {
 34         paintTheImage();
 35     }
 36 
 37     // THE SOLUTION TO THE GRAPHICAL PROBLEM
 38     private void paintTheImage() {
 39         //GRAB THE INPUT INFORMATION
 40         int nrOfRows = getNumber("rows");
 41         int nrOfColumns = getNumber("columns");
 42         int sizeOfSquare = getNumber("square side length");
 43         //ESTABLISH THE PAINTER
 44         int height = nrOfRows * sizeOfSquare;
 45         int width = nrOfColumns * sizeOfSquare;
 46         SPainter miro = new SPainter("Number 1", width + 50, height + 50);
 47         miro.setBrushWidth(4);
 48         SSquare square = new SSquare(sizeOfSquare);
 49         //PAINT THE RECTANGLE
 50         paintRectangle(miro, square, nrOfRows, nrOfColumns);
 51     }
 52 
 53     private static int getNumber(String prompt) {
 54         String nss = JOptionPane.showInputDialog(null, prompt + "?");
 55         Scanner scanner = new Scanner(nss);
 56         return scanner.nextInt();
 57     }
 58 
 59     private static void paintRectangle(SPainter miro, SSquare square, int nrOfRows, int nrOfColumns) {
 60         //POSITION THE PAINTER TO PAINT THE RECTANGLE OF SQUARES
 61         miro.mlt(((nrOfColumns - 1) / 2.0) * square.side());
 62         miro.mbk(((nrOfRows - 1) / 2.0) * square.side());
 63         //PAINT THE RECTANGLE OF SQUARES
 64         int i = 1;
 65         while (i <= nrOfRows) {
 66             paintOneRow(miro, nrOfColumns, square);
 67             miro.mfd(square.side());
 68             i = i + 1;
 69         }
 70         //MAKE THE METHOD INVARIANT WITH RESPECT TO THE PAINTER POSITION
 71         miro.mrt(((nrOfColumns - 1) / 2.0) * square.side());
 72         miro.mfd(((nrOfRows - 1) / 2.0) * square.side());
 73     }
 74 
 75     private static void paintOneRow(SPainter miro, int nrOfColumns, SSquare square) {
 76         int i = 1;
 77         while (i <= nrOfColumns) {
 78             paintOneSquare(miro, square);
 79             miro.mrt(square.side());
 80             i = i + 1;
 81         }
 82         miro.mlt(nrOfColumns * square.side());
 83     }
 84 
 85     private static void paintOneSquare(SPainter miro, SSquare square) {
 86         miro.setColor(randomColor());
 87         miro.paint(square);
 88         miro.setColor(Color.BLACK);
 89         miro.draw(square);
 90     }
 91 
 92     private static Color randomColor() {
 93         Random rgen = new Random();
 94         int r = rgen.nextInt(256);
 95         int g = rgen.nextInt(256);
 96         int b = rgen.nextInt(256);
 97         return new Color(r, b, g);
 98     }
 99 
100 }
101