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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);
}
}
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