Created net.mograsim.preferences

[Mograsim.git] / net.mograsim.preferences / src / net / mograsim / preferences / ColorDefinition.java

diff --git a/net.mograsim.preferences/src/net/mograsim/preferences/ColorDefinition.java b/net.mograsim.preferences/src/net/mograsim/preferences/ColorDefinition.java
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+++ b/net.mograsim.preferences/src/net/mograsim/preferences/ColorDefinition.java
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+package net.mograsim.preferences;
+
+/**
+ * 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>
+ * 
+ * @author Daniel Kirschten
+ */
+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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