|
1 package gnu.kawa.models;
2 import java.awt.*;
3 import java.awt.geom.*;
4
5 public class WithComposite implements Paintable
6 {
7 Paintable[] paintable;
8 Composite[] composite;
9
10 public static WithComposite make(Paintable paintable, Composite composite)
11 {
12 WithComposite comp = new WithComposite();
13 comp.paintable = new Paintable[] { paintable };
14 comp.composite = new Composite[] { composite };
15 return comp;
16 }
17
18 public static WithComposite make(Paintable[] paintable,
19 Composite[] composite)
20 {
21 WithComposite comp = new WithComposite();
22 comp.paintable = paintable;
23 comp.composite = composite;
24 return comp;
25 }
26
27 public static WithComposite make(Object  [] arguments)
28 {
29 int n = 0;
30 for (int i = arguments.length; --i >= 0; )
31 {
32 if (arguments[i] instanceof Paintable)
33 n++;
34 }
35 Paintable[] paintable = new Paintable[n];
36 Composite[] composite = new Composite[n];
37 Composite comp = null;
38 int j = 0;
39 for (int i = 0; i < arguments.length; i++)
40 {
41 Object arg = arguments[i];
42 if (arg instanceof Paintable)
43 {
44 paintable[j] = (Paintable) arguments[i];
45 composite[j] = comp;
46 j++;
47 }
48 else
49 {
50 comp = (Composite) arg;
51 }
52 }
53 return make(paintable, composite);
54
55 }
56
57 public void paint (Graphics2D graphics)
58 {
59 Composite saved = graphics.getComposite();
60 Composite prev = saved;
61 try
62 {
63 int n = paintable.length;
64 for (int i = 0; i < n; i++)
65 {
66 Composite cur = composite[i];
67 if (cur != null && cur != prev)
68 {
69 graphics.setComposite(cur);
70 prev = cur;
71 }
72 paintable[i].paint(graphics);
73 }
74 }
75 finally
76 {
77 if (prev != saved)
78 graphics.setComposite(saved);
79 }
80 }
81
82 public Rectangle2D getBounds2D()
83 {
84 int n = paintable.length;
85 if (n == 0)
86 return null; Rectangle2D bounds = paintable[0].getBounds2D();
88 for (int i = 1; i < n; i++)
89 bounds = bounds.createUnion(paintable[i].getBounds2D());
90 return bounds;
91 }
92
93 public Paintable transform (AffineTransform tr)
94 {
95 int n = paintable.length;
96 Paintable[] transformed = new Paintable[n];
97 for (int i = 0; i < n; i++)
98 transformed[i] = paintable[i].transform(tr);
99 return WithComposite.make(transformed, composite);
100 }
101 }
102 |
Popular Tags |
Java API By Example, From Geeks To Geeks.