+package era.mi.logic.types;
+
+/**
+ * A way to define a color with the possibility to use colors built into the system (called "system colors" in SWT).
+ * <p>
+ * A {@link ColorDefinition} is defined either by a {@link BuiltInColor} constant, in which case <code>r==g==b==-1</code>, or by red / green
+ * / blue components, in which case <code>builtInColor==null</code>
+ */
+public class ColorDefinition
+{
+ /**
+ * The built-in color constant defining this color.
+ */
+ public final ColorDefinition.BuiltInColor builtInColor;
+ /**
+ * The red color component defining this color.
+ */
+ public final int r;
+ /**
+ * The green color component defining this color.
+ */
+ public final int g;
+ /**
+ * The blue color component defining this color.
+ */
+ public final int b;
+
+ public ColorDefinition(ColorDefinition.BuiltInColor col)
+ {
+ if (col == null)
+ throw new IllegalArgumentException("Illegal built-in color: " + col);
+ this.builtInColor = col;
+ this.r = -1;
+ this.g = -1;
+ this.b = -1;
+ }
+
+ public ColorDefinition(int r, int g, int b)
+ {
+ if (r < 0 || r > 255 || g < 0 || g > 255 || b < 0 || b > 255)
+ throw new IllegalArgumentException("Illegal color components: r=" + r + "; g=" + g + "; b=" + b);
+ this.builtInColor = null;
+ this.r = r;
+ this.g = g;
+ this.b = b;
+ }
+
+ public static enum BuiltInColor
+ {
+ COLOR_WHITE, COLOR_BLACK, COLOR_RED, COLOR_DARK_RED, COLOR_GREEN, COLOR_DARK_GREEN, COLOR_YELLOW, COLOR_DARK_YELLOW, COLOR_BLUE,
+ COLOR_DARK_BLUE, COLOR_MAGENTA, COLOR_DARK_MAGENTA, COLOR_CYAN, COLOR_DARK_CYAN, COLOR_GRAY, COLOR_DARK_GRAY;
+ }
+
+}
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