net.mograsim.logic.core/src/net/mograsim/logic/core/types/ColorDefinition.java

   1 package net.mograsim.logic.core.types;
   2
   3 /**
   4  * A way to define a color with the possibility to use colors built into the system (called "system colors" in SWT).
   5  * <p>
   6  * A {@link ColorDefinition} is defined either by a {@link BuiltInColor} constant, in which case <code>r==g==b==-1</code>, or by red / green
   7  * / blue components, in which case <code>builtInColor==null</code>
   8  */
   9 public class ColorDefinition
  10 {
  11         /**
  12          * The built-in color constant defining this color.
  13          */
  14         public final ColorDefinition.BuiltInColor builtInColor;
  15         /**
  16          * The red color component defining this color.
  17          */
  18         public final int r;
  19         /**
  20          * The green color component defining this color.
  21          */
  22         public final int g;
  23         /**
  24          * The blue color component defining this color.
  25          */
  26         public final int b;
  27
  28         public ColorDefinition(ColorDefinition.BuiltInColor col)
  29         {
  30                 if (col == null)
  31                         throw new IllegalArgumentException("Illegal built-in color: " + col);
  32                 this.builtInColor = col;
  33                 this.r = -1;
  34                 this.g = -1;
  35                 this.b = -1;
  36         }
  37
  38         public ColorDefinition(int r, int g, int b)
  39         {
  40                 if (r < 0 || r > 255 || g < 0 || g > 255 || b < 0 || b > 255)
  41                         throw new IllegalArgumentException("Illegal color components: r=" + r + "; g=" + g + "; b=" + b);
  42                 this.builtInColor = null;
  43                 this.r = r;
  44                 this.g = g;
  45                 this.b = b;
  46         }
  47
  48         public static enum BuiltInColor
  49         {
  50                 COLOR_WHITE, COLOR_BLACK, COLOR_RED, COLOR_DARK_RED, COLOR_GREEN, COLOR_DARK_GREEN, COLOR_YELLOW, COLOR_DARK_YELLOW, COLOR_BLUE,
  51                 COLOR_DARK_BLUE, COLOR_MAGENTA, COLOR_DARK_MAGENTA, COLOR_CYAN, COLOR_DARK_CYAN, COLOR_GRAY, COLOR_DARK_GRAY;
  52         }
  53
  54 }