1    package npw;
2    
3    import painter.SPainter;
4    import shapes.SCircle;
5    
6    import javax.swing.*;
7    import javax.swing.plaf.ColorChooserUI;
8    import java.awt.*;
9    import java.util.Random;
10   import java.util.Scanner;
11   
12   public class SimpleDots {
13       public static void main(String[] args) {
14           SwingUtilities.invokeLater(SimpleDots::new);
15       }
16   
17       public SimpleDots() {
18           paintTheImage();
19       }
20   
21       private String colorChoice = getString ("Red, Blue or Green?");
22   
23       private void paintTheImage() {
24           // Grab the input information
25           int width = getNumber("width");
26           int height = getNumber("height");
27           int dotSpacing = getNumber("dot spacing");
28   
29           // Establish the painter
30           SPainter painter = new SPainter("Abstract Gradient", width, height);
31           SCircle dot = new SCircle(5);
32   
33           // Move the painter to the upper left corner to get ready to paint the gradient
34           painter.mfd(height / 2);
35           painter.tl(90);
36           painter.mfd(width / 2);
37           painter.tl(90);
38   
39           // Paint it!
40           paintGradient(painter, dot, height, width, dotSpacing);
41       }
42   
43       private static int getNumber(String prompt) {
44           String nss = JOptionPane.showInputDialog(null, prompt + "?");
45           Scanner scanner = new Scanner(nss);
46           return scanner.nextInt();
47       }
48   
49       private static String getString(String prompt) {
50           String nss = JOptionPane.showInputDialog(null, prompt + "?");
51           Scanner scanner = new Scanner(nss);
52           return scanner.next();
53       }
54   
55       private void paintGradient(SPainter painter, SCircle dot, int height, int width, int dotSpacing) {
56           int cols = 0;
57           // Calculate the number of columns.
58           int nrOfCols = (width / dotSpacing - 1);
59   
60           while (cols < nrOfCols) {
61               nextCol(painter, dotSpacing);
62               paintColumn(painter, dot, height, dotSpacing);
63               cols = cols + 1;
64           }
65       }
66   
67       private void paintOneDot(SPainter painter, SCircle dot) {
68           chooseColors(painter);
69           painter.paint(dot);
70   
71       }
72   
73       private void randomColor(SPainter painter) {
74           Random colorful = new Random();
75           int r = colorful.nextInt(255);
76           int g = colorful.nextInt(255);
77           int b = colorful.nextInt(255);
78           painter.setColor(new Color(r, g, b));
79   
80       }
81   
82       // Dots are spaced tighter together near the bottom of the canvas.-CHANGE
83       private void paintColumn(SPainter painter, SCircle dot, int height, int dotSpacing) {
84           int travel = 0;
85           int totalDistanceTraveled = 0;
86   
87           // Paint a row with equal distance between dots.
88           while (totalDistanceTraveled < height - (dot.radius() * 3)) {
89               //travel = randomDistance((height - totalDistanceTraveled) / 4);
90               travel = dotSpacing;
91               totalDistanceTraveled = totalDistanceTraveled + travel;
92               painter.mfd(travel);
93               paintOneDot(painter, dot);
94           }
95   
96           // Make the method invariant with respect to painter position.
97           painter.mbk(totalDistanceTraveled);
98       }
99   
100      // Moves the painter to the next column.
101      private void nextCol(SPainter painter, int colWidth) {
102          painter.tl(90);
103          painter.mfd(colWidth);
104          painter.tr(90);
105      }
106  
107  
108      private void chooseColors(SPainter painter) {
109  
110  
111          if (colorChoice.equalsIgnoreCase("red")) {
112              painter.setColor(Color.RED);
113          } else if (colorChoice.equalsIgnoreCase("blue")) {
114              painter.setColor(Color.BLUE);
115          } else if (colorChoice.equalsIgnoreCase("green")) {
116              painter.setColor(Color.GREEN);
117          } else {
118              painter.setColor(Color.BLACK);
119          }
120      }
121  
122  }
123