Package be.gaudry.model.drawing.color

Class ColorUtils

java.lang.Object
be.gaudry.model.drawing.color.ColorUtils
public final class ColorUtils extends Object
Provided by the broldev.core.model project.
Since:
1.0 Dec 2, 2008, broldev.core.model 0.0.1-SNAPSHOT dependency
Version:
1.2 Nov 9, 2010
Author:
Steph GAUDRY

  • Method Details

    • color2html

      public static String color2html​(Color color)
      Use a given Color to get the corresponding HTML string.
      Parameters:
      color - Color to get as string.
      Returns:
      HTML representation #hexvalue of the color

    • decodeHtmlColor

      public static Color decodeHtmlColor​(String htmlColor)
      Parses the string argument as a Color.

      An exception of type NumberFormatException is thrown if any of the following situations occurs:

      • The htmlColor argument is null or is a string of length zero.
      • The htmlColor argument does not match to the following pattern # + red hex value on two chars + green hex value on two chars + blue hex value on two chars.

      Examples: 

       decodeHtmlColor("#FFFFFF;")       returns Color.WHITE
 decodeHtmlColor("FFFFFF")               returns Color.WHITE
 decodeHtmlColor("FFF")               returns Color.WHITE
 decodeHtmlColor("FFFFFF;")       returns Color.WHITE
 decodeHtmlColor("#OOOOOO")       returns Color.BLACK
 decodeHtmlColor("FFFFFFF")       throws a NumberFormatException
 decodeHtmlColor("#FFG")               throws a NumberFormatException
 decodeHtmlColor("white")               throws a NumberFormatException
      Parameters:
      htmlColor - the String containing the HTML color representation to be parsed
      Returns:
      the Color represented by the string argument.
      Throws:
      NumberFormatException - if the String does not contain a parsable Color.
      IllegalArgumentException - if htmlColor is null

    • alpha

      public static Color alpha​(Color opaqueColor, float opacity)
      An opacity value of 1.0 means that the color is completely opaque and an alpha value of 0.0 means that the color is completely transparent.
      Parameters:
      opaqueColor - original opaque Color
      opacity - opacity value
      Returns:
      the Color with the desired opacity
      Throws:
      IllegalArgumentException - if opacity is outside of the range 0.0 to 1.0, inclusive