author | wenzelm |
Sun, 04 Dec 2016 18:53:55 +0100 | |
changeset 64537 | 693389d87139 |
parent 64370 | 865b39487b5d |
child 70083 | 96776eb41854 |
permissions | -rw-r--r-- |
53783
f5e9d182f645
clarified location of GUI modules (which depend on Swing of JFX);
wenzelm
parents:
49322
diff
changeset
|
1 |
/* Title: Pure/GUI/color_value.scala |
49294 | 2 |
Author: Makarius |
3 |
||
4 |
Cached color values. |
|
5 |
*/ |
|
6 |
||
7 |
package isabelle |
|
8 |
||
9 |
||
10 |
import java.awt.Color |
|
62570 | 11 |
import java.util.Locale |
49294 | 12 |
|
13 |
||
14 |
object Color_Value |
|
15 |
{ |
|
16 |
private var cache = Map.empty[String, Color] |
|
17 |
||
18 |
def parse(s: String): Color = |
|
19 |
{ |
|
20 |
val i = java.lang.Long.parseLong(s, 16) |
|
21 |
val r = ((i >> 24) & 0xFF).toInt |
|
22 |
val g = ((i >> 16) & 0xFF).toInt |
|
23 |
val b = ((i >> 8) & 0xFF).toInt |
|
24 |
val a = (i & 0xFF).toInt |
|
25 |
new Color(r, g, b, a) |
|
26 |
} |
|
27 |
||
28 |
def print(c: Color): String = |
|
29 |
{ |
|
30 |
val r = new java.lang.Integer(c.getRed) |
|
31 |
val g = new java.lang.Integer(c.getGreen) |
|
32 |
val b = new java.lang.Integer(c.getBlue) |
|
33 |
val a = new java.lang.Integer(c.getAlpha) |
|
62570 | 34 |
Word.uppercase(String.format(Locale.ROOT, "%02x%02x%02x%02x", r, g, b, a)) |
49294 | 35 |
} |
36 |
||
37 |
def apply(s: String): Color = |
|
38 |
synchronized { |
|
39 |
cache.get(s) match { |
|
40 |
case Some(c) => c |
|
41 |
case None => |
|
42 |
val c = parse(s) |
|
43 |
cache += (s -> c) |
|
44 |
c |
|
45 |
} |
|
46 |
} |
|
47 |
} |
|
48 |