X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fconfig%2FColourUtils.java;fp=src%2Ftim%2Fprune%2Fconfig%2FColourUtils.java;h=a3c11880dfe69b53857b536345eb5cbf44c72f88;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/config/ColourUtils.java b/src/tim/prune/config/ColourUtils.java
new file mode 100644
index 0000000..a3c1188
--- /dev/null
+++ b/src/tim/prune/config/ColourUtils.java
@@ -0,0 +1,65 @@
+package tim.prune.config;
+
+import java.awt.Color;
+
+/**
+ * Class to hold static methods for handling colours
+ * including converting to and from hex code Strings
+ */
+public abstract class ColourUtils
+{
+	/**
+	 * Convert a string into a Color object
+	 * @param inValue 6-character hex code
+	 * @return corresponding colour
+	 */
+	public static Color colourFromHex(String inValue)
+	{
+		Color retVal = null;
+		if (inValue != null && inValue.length() == 6)
+		{
+			try
+			{
+				final int redness = convertToInt(inValue.substring(0, 2));
+				final int greenness = convertToInt(inValue.substring(2, 4));
+				final int blueness = convertToInt(inValue.substring(4, 6));
+				retVal = new Color(redness, greenness, blueness);
+			}
+			catch (NumberFormatException nfe) {} // colour stays null
+		}
+		return retVal;
+	}
+
+	/**
+	 * @param inPair two-digit String representing hex code
+	 * @return corresponding integer (0 to 255)
+	 */
+	private static int convertToInt(String inPair)
+	{
+		int val = Integer.parseInt(inPair, 16);
+		if (val < 0) val = 0;
+		return val;
+	}
+
+	/**
+	 * Make a hex code string for the given colour
+	 * @param inColour colour
+	 * @return 6-character hex code
+	 */
+	public static String makeHexCode(Color inColour)
+	{
+		return convertToHex(inColour.getRed()) + convertToHex(inColour.getGreen()) + convertToHex(inColour.getBlue());
+	}
+
+	/**
+	 * @param inValue integer value from 0 to 255
+	 * @return two-character hex code
+	 */
+	private static String convertToHex(int inValue)
+	{
+		// Uses lower case a-f
+		String code = Integer.toHexString(inValue);
+		// Pad with leading 0 if necessary
+		return (inValue < 16 ? "0" + code : code);
+	}
+}