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1 package org.snipsnap.util;
2
3
9
10 public class ColorRange {
11 String  start;
12 String end;
13 int steps;
14
15 float dr, dg, db;
16 int r1, g1, b1;
17
18 public ColorRange(String start, String end, int steps) {
19 start = start.substring(0, 1).equals("#") ? start.substring(1) : start;
20 end = end.substring(0, 1).equals("#") ? end.substring(1) : end;
21 this.start = start;
22 this.end = end;
23 this.steps = steps;
24
25 this.r1 = Integer.parseInt(start.substring(0, 2), 16);
26 this.g1 = Integer.parseInt(start.substring(2, 4), 16);
27 this.b1 = Integer.parseInt(start.substring(4, 6), 16);
28
29 int r2 = Integer.parseInt(end.substring(0, 2), 16);
30 int g2 = Integer.parseInt(end.substring(2, 4), 16);
31 int b2 = Integer.parseInt(end.substring(4, 6), 16);
32 if (steps != 1) {
33 this.dr = (r2 - r1) / (steps - 1);
34 this.dg = (g2 - g1) / (steps - 1);
35 this.db = (b2 - b1) / (steps - 1);
36 } else {
37 this.dr = this.dg = this.db = 0;
38 }
39 }
40
41 public String getColor(int step) {
42 if (step > this.steps - 1) {
43 throw new IllegalArgumentException ("steps range from 0 to " + (this.steps - 1));
44 }
45
46 int r = (int) (dr * step + r1);
47 int g = (int) (dg * step + g1);
48 int b = (int) (db * step + b1);
49
50 return "#" + Integer.toHexString(r) + Integer.toHexString(g) + Integer.toHexString(b);
51 }
52
53 }
54 |
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