1    package ip.transforms; 
2     
3     
4    import java.awt.*; 
5    import java.util.Enumeration; 
6    import java.util.Vector; 
7     
8     
9    public class Points { 
10       private Vector pointVector = new Vector(); 
11       private Enumeration pointEnumeration = null; 
12    
13       public void addPoint(Point p) { 
14           pointVector.addElement(p); 
15       } 
16    
17       public Point getPointAt(int i) { 
18           return (Point) pointVector.elementAt(i); 
19       } 
20    
21       public boolean hasMorePoints() { 
22           if (pointEnumeration == null) pointEnumeration = getEnumeration(); 
23           return pointEnumeration.hasMoreElements(); 
24       } 
25    
26       public Point nextPoint() { 
27           if (pointEnumeration == null) pointEnumeration = getEnumeration(); 
28           if (!hasMorePoints()) return null; 
29           return (Point) pointEnumeration.nextElement(); 
30       } 
31    
32       private Enumeration getEnumeration() { 
33           return pointVector.elements(); 
34       } 
35    
36       public int getSize() { 
37           return pointVector.size(); 
38       } 
39    
40       public void drawUserPoints(Graphics g) { 
41           for (int i = 0; i < getSize(); i++) { 
42               Point p = getPointAt(i); 
43               g.drawLine(p.x - 1, p.y - 1, p.x + 1, p.y + 1); 
44               g.drawLine(p.x + 1, p.y - 1, p.x - 1, p.y + 1); 
45           } 
46       } 
47    
48       public static boolean isRangeValid(Point p1, Point p2, Dimension d) { 
49           return isRangeValid(p1, d) && isRangeValid(p2, d); 
50       } 
51    
52       public static boolean isRangeValid(Point p, Dimension d) { 
53           return (p.x >= 0) && (p.y >= 0) && (p.x < d.width) && (p.y < d.height); 
54       } 
55    
56    
57   } 
58    
59    
60    
61