1    /* 
2     * A program to paint, centered on the canvas, a circle of randomly colored, black-framed squares. 
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.Random;
13   import java.util.Scanner;
14   
15   public class SimpleDots {
16   
17       private void paintTheImage(){
18           // Get the input information
19           int radius = getNumber("circle radius");
20           int diameter = getNumber("Circle Diameter");
21           double radius2= diameter/2;
22   
23           // Establish the painter
24           SPainter painter = new SPainter("Circle of Squares", radius*2+50, radius*2+50);
25           painter.setBrushWidth(3);
26           SCircle circle = new SCircle(radius);
27           SCircle circles= new SCircle(radius2);
28   
29           while (true){
30               String color= JOptionPane.showInputDialog(null,"command?");
31               System.out.println(color);
32               if(color == null){
33                   color= "exit";
34                   break;
35               }// user clicked on cancel
36               if(color.equalsIgnoreCase("blue")) {
37                   painter.setColor(Color.BLUE);
38   
39                   break;
40               } else if(color.equalsIgnoreCase("Red")) {
41                   painter.setColor(Color.RED);
42   
43                   break;
44               }else if(color.equalsIgnoreCase("Black")) {
45                   painter.setColor(Color.BLACK);
46   
47                   break;
48               }else if(color.equalsIgnoreCase("Green")) {
49                   painter.setColor(Color.GREEN);
50   
51                   break;
52               }else if(color.equalsIgnoreCase("Help")) {
53                   JOptionPane.showMessageDialog(null, "valid commands are:" + "red| blue| Black|Green| Help| Exit");
54                   break;
55               }else if(color.equalsIgnoreCase("exit")){
56                   painter.end();
57                   System.out.println(" Thank you for viewing the dots...");
58                   break;
59   
60   
61               }
62   
63   
64   
65   
66           }
67   
68           // Paint the squares
69           paintCircleOfSquares(painter, circle, circles);
70       }
71   
72       private void paintCircleOfSquares(SPainter painter, SCircle circle, SCircle circles){
73           // Position the painter to begin drawing the rows
74           painter.mfd(circle.radius());
75           painter.tr();
76           // Paint the circle of squares
77           double moved = 0;
78           while (moved < circle.diameter()) {
79               double chord = chordLength(circle.radius() - moved, circle);
80               System.out.println(chord);
81               int lineCircle = circleOnLineCount(chord, circles.diameter());
82               System.out.println(lineCircle);
83               paintRow(painter, circles, lineCircle);
84               nextRow(painter, circles.diameter());
85               moved = moved + circles.diameter();
86           }
87           // Make the method invariant with respect to painter position
88           painter.tl();
89           painter.mfd(circle.radius());
90       }
91   
92       // Move to the next row
93       private void nextRow(SPainter painter, double rowHeight){
94           painter.tr();
95           painter.mfd(rowHeight);
96           painter.tl();
97       }
98   
99       // Assumes the painter is at the center of the row to paint, facing right.
100      private void paintRow(SPainter painter, SCircle circles, int circleToPaint){
101          // Move backward 1/2 of the length we're painting to get ready to paint the row.
102          double centerOffset = ( (circleToPaint * circles.diameter() / 2) - circles.diameter()/2);
103          painter.mbk(centerOffset);
104  
105          // Paint the row of squares.
106          int painted = 0;
107          while (painted < circleToPaint){
108              paintOneCircle(painter,circles);
109              painter.mfd(circles.diameter());
110              painted = painted + 1;
111          }
112  
113          // Make the method invariant with respect to painter position.
114          painter.mbk(centerOffset + circles.diameter());
115      }
116  
117      private void paintOneCircle(SPainter painter, SCircle circles){
118          //painter.setColor(randomColor());
119          circles.s3();
120          painter.paint(circles);
121          circles.x3();
122  
123      }
124  
125      private static int circleOnLineCount(double lineLength, double sideLength){
126          System.out.println(lineLength + " " + sideLength);
127          int circles = ( (int)Math.ceil( ( lineLength - sideLength ) / sideLength ) + 1);
128          return circles;
129      }
130  
131      private double chordLength(double yOffset, SCircle circle){
132          double xLength = Math.sqrt(Math.pow(circle.radius(), 2) - Math.pow(yOffset, 2));
133          double chordLength = xLength * 2;
134          return chordLength;
135      }
136  
137      private static int getNumber(String prompt) {
138          String nss = JOptionPane.showInputDialog(null,prompt+"?");
139          Scanner scanner = new Scanner(nss);
140          return scanner.nextInt();
141      }
142  
143  
144      /*private static Color randomColor() { 
145          Random rgen = new Random(); 
146          int r = rgen.nextInt(256); 
147          int g = rgen.nextInt(256); 
148          int b = rgen.nextInt(256); 
149          return new Color(r,g,b); 
150      } 
151  */
152  
153  
154      public SimpleDots() {
155          paintTheImage();
156      }
157  
158      public static void main(String[] args) {
159          SwingUtilities.invokeLater(new Runnable() {
160              public void run() {
161                  new SimpleDots();
162              }
163          });
164      }
165  }
166