1    /* 
2     * A program to paint, centered on the canvas, a circle of randomly colored, unframed dots. 
3     */
4    
5    package npw;
6    
7    import painter.SPainter;
8    import shapes.SCircle;
9    
10   import javax.swing.*;
11   import java.awt.*;
12   import java.util.Scanner;
13   
14   public class SimpleDots {
15   
16       private void paintTheImage(){
17           // Get the input information
18           int radius = getNumber("circle radius");
19           String color = getString("Type in red, blue, or green");
20           Color userColor = paintColor(color);
21           int dotradius = getNumber("Small circle radius");
22   
23           // Establish the painter
24           SPainter painter = new SPainter("Simple Dots", radius*2+50, radius*2+50);
25           painter.setBrushWidth(3);
26           SCircle circle = new SCircle(radius);
27           SCircle dots = new SCircle(dotradius);
28           painter.setColor(userColor);
29   
30   
31           // Paint the circles
32           paintSimpleDots(painter, circle, dots);
33       }
34   
35       private void paintSimpleDots(SPainter painter, SCircle circle, SCircle dot){
36           // Position the painter to begin drawing the rows
37           painter.mfd(circle.radius());
38           painter.tr();
39           // Paint the simple dots
40           double moved = 0;
41           while (moved < circle.diameter()) {
42               System.out.println(moved + " " + circle.diameter());
43               double chord = chordLength(circle.radius() - moved, circle);
44               int dots = dotsOnLineCount(chord, dot.diameter());
45               paintRow(painter, dot, dots);
46               nextRow(painter, dot.diameter());
47               //moved = moved + circle.diameter();
48               moved += dot.diameter();
49           }
50           // Make the method invariant with respect to painter position
51           painter.tl();
52           painter.mfd(circle.radius());
53       }
54   
55       // Move to the next row
56       private void nextRow(SPainter painter, double rowHeight){
57           painter.tr();
58           painter.mfd(rowHeight);
59           painter.tl();
60       }
61   
62       // Assumes the painter is at the center of the row to paint, facing right.
63       private void paintRow(SPainter painter, SCircle circle, int dotsToPaint){
64           // Move backward 1/2 of the length we're painting to get ready to paint the row.
65           double centerOffset = ( (dotsToPaint * circle.diameter()) / 2) - circle.diameter()/2;
66           painter.mbk(centerOffset);
67   
68           // Paint the row of squares.
69           int painted = 0;
70           while (painted < dotsToPaint){
71               System.out.println(painted);
72               paintOneSquare(painter, circle);
73               painter.mfd(circle.diameter());
74               painted = painted + 1;
75           }
76   
77           // Make the method invariant with respect to painter position.
78           painter.mbk(centerOffset + circle.diameter());
79       }
80   
81   
82   
83       private void paintOneSquare(SPainter painter, SCircle circle){
84           circle.s2();
85           System.out.println("here");
86           painter.paint(circle);
87           circle.x2();
88       }
89   
90       private static int dotsOnLineCount(double lineLength, double sideLength){
91           int dots = ( (int)Math.ceil( ( lineLength - sideLength ) / sideLength ) + 1);
92           return dots;
93       }
94   
95       private double chordLength(double yOffset, SCircle circle){
96           double xLength = Math.sqrt(Math.pow(circle.radius(), 2) - Math.pow(yOffset, 2));
97           double chordLength = xLength * 2;
98           return chordLength;
99       }
100  
101      private static int getNumber(String prompt) {
102          String nss = JOptionPane.showInputDialog(null,prompt+"?");
103          Scanner scanner = new Scanner(nss);
104          return scanner.nextInt();
105      }
106  
107      public static Color paintColor(String colorName) {
108          int r;
109          int b;
110          int g;
111          if (colorName.equals("red")) {
112              r = 255;
113              b = 0;
114              g = 0;
115          } else if (colorName.equals("blue")) {
116              r = 0;
117              g = 0;
118              b = 255;
119          } else if (colorName.equals("green")) {
120              r = 0;
121              g = 204;
122              b = 0;
123  
124          } else {
125              r = 0;
126              b = 0;
127              g = 0;
128          }
129          return new Color(r, g, b);
130      }
131  
132      public SimpleDots() {
133          paintTheImage();
134      }
135  
136      private static String getString(String prompt) {
137          String nss = JOptionPane.showInputDialog(null,prompt+"?");
138          Scanner scanner = new Scanner(nss);
139          return scanner.next();
140      }
141  
142      public static void main(String[] args) {
143          SwingUtilities.invokeLater(new Runnable() {
144              public void run() {
145                  new SimpleDots();
146              }
147          });
148      }
149  }
150  
151  
152