1    package npw;
2    
3    import painter.SPainter;
4    import shapes.SCircle;
5    
6    import javax.swing.*;
7    import java.awt.*;
8    import java.util.Random;
9    import java.util.Scanner;
10   
11   public class SimpleDots {
12   
13       private void paintTheImage() {// Get the input information
14           int radius = getNumber("circle radius");
15           int dotRadius = getNumber("radius of dot");
16           String input = getColor("Inputs Are: ");
17   
18           // Establish the painter
19           SPainter painter = new SPainter("Simple Dots", radius * 2 + 50, radius * 2 + 50);
20           painter.setBrushWidth(3);
21           SCircle circle = new SCircle(radius);
22           SCircle dot = new SCircle(dotRadius);
23   
24           // Paint the squares
25           paintCircleOfSquares(painter, circle, dot, input);
26       }
27   
28       private String getColor(String prompt) {
29           String rbg = JOptionPane.showInputDialog(null, prompt + "blue | green | red | other");
30           return rbg;
31       }
32   
33       private void paintCircleOfSquares(SPainter painter, SCircle circle, SCircle dot, String input) {
34           // Position the painter to begin drawing the rows
35           painter.mfd(circle.radius());
36           painter.tr();
37           // Paint the circle of squares
38           double moved = 0;
39           while (moved < circle.diameter()) {
40               double chord = chordLength(circle.radius() - moved, circle);
41               int dots = circlesOnLineCount(chord, dot.diameter());
42               paintRow(painter, dot,dots,input);
43               nextRow(painter, dot.radius());
44               moved = moved + dot.radius();
45           }
46           // Make the method invariant with respect to painter position
47           painter.tl();
48           painter.mfd(circle.radius());
49       }
50   
51       // Move to the next row
52       private void nextRow(SPainter painter, double rowHeight) {
53           painter.tr();
54           painter.mfd(rowHeight);
55           painter.tl();
56       }
57   
58       // Assumes the painter is at the center of the row to paint, facing right.
59       private void paintRow(SPainter painter, SCircle dot, int CirclesToPaint, String input) {
60           // Move backward 1/2 of the length we're painting to get ready to paint the row.
61           double centerOffset = ((CirclesToPaint * dot.diameter()) / 2) - dot.diameter() / 2;
62           painter.mbk(centerOffset);
63   
64           // Paint the row of squares.
65           int painted = 0;
66           while (painted < CirclesToPaint) {
67               paintOneSquare(painter, dot,input);
68               painter.mfd(dot.diameter());
69               painted = painted + 1;
70           }
71   
72           // Make the method invariant with respect to painter position.
73           painter.mbk(centerOffset + dot.diameter());
74       }
75   
76       private void paintOneSquare(SPainter painter, SCircle dot, String input) {
77           dot.s2();
78           if (input.equals("red")){
79               painter.setColor(Color.RED);
80               painter.paint(dot);}
81           else if (input.equals("green")){
82               painter.setColor(Color.GREEN);
83               painter.paint(dot);
84           } else if (input.equals("blue")) {
85               painter.setColor(Color.BLUE);
86               painter.paint(dot);
87           }
88           dot.x2();
89   
90       }
91   
92       private static int circlesOnLineCount(double lineLength, double sideLength) {
93           int circles = ((int) Math.ceil((lineLength - sideLength) / sideLength) + 1);
94           return circles;
95       }
96   
97       private double chordLength(double yOffset, SCircle circle) {
98           double xLength = Math.sqrt(Math.pow(circle.radius(), 2) - Math.pow(yOffset, 2));
99           double chordLength = xLength * 2;
100          return chordLength;
101      }
102  
103      private static int getNumber(String prompt) {
104          String nss = JOptionPane.showInputDialog(null, prompt + "?");
105          Scanner scanner = new Scanner(nss);
106          return scanner.nextInt();
107      }
108  
109      public SimpleDots() {
110          paintTheImage();
111      }
112  
113      public static void main(String[] args) {
114          SwingUtilities.invokeLater(new Runnable() {
115              public void run() {
116                  new SimpleDots();
117              }
118          });
119      }
120  }