neth        01/09/03 06:34:53

  Added:       src/org/apache/jmeter/util ColorHelper.java
  Log:
  Returns a color and this color changes with every call.
  
  Revision  Changes    Path
  1.1                  jakarta-jmeter/src/org/apache/jmeter/util/ColorHelper.java
  
  Index: ColorHelper.java
  ===================================================================
  /*
   * ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2001 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   * notice, this list of conditions and the following disclaimer in
   * the documentation and/or other materials provided with the
   * distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   * if any, must include the following acknowledgment:
   * "This product includes software developed by the
   * Apache Software Foundation (http://www.apache.org/)."
   * Alternately, this acknowledgment may appear in the software itself,
   * if and wherever such third-party acknowledgments normally appear.
   *
   * 4. The names "Apache" and "Apache Software Foundation" and
   * "Apache JMeter" must not be used to endorse or promote products
   * derived from this software without prior written permission. For
   * written permission, please contact [EMAIL PROTECTED]
   *
   * 5. Products derived from this software may not be called "Apache",
   * "Apache JMeter", nor may "Apache" appear in their name, without
   * prior written permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  
  package org.apache.jmeter.util;
  
  import java.awt.*;
  import java.math.*;
  
  /**
   * This class contains the static utility methods to manipulate colors.
   *
   * @author     Khor Soon Hin
   * @created    2001/08/13
   * @version    $Revision: 1.1 $ $Date: 2001/09/03 13:34:53 $
   */
  
  public class ColorHelper
  {
    /**
     * Given the <code>Color</code>, get the red, green and blue components.
     * Increment the lowest of the components by the indicated increment value.
     * If all the components are the same value increment in the order of
     * red, green and blue.
     *
     * @param inc               value to increment the color components
     * @return          the color after change
     */
    public static Color changeColorCyclicIncrement(Color col, int inc)
    {
      int red = col.getRed();
      int green = col.getGreen();
      int blue = col.getBlue();
      int temp1 = Math.min(red, green);
      int temp2 = Math.min(temp1, blue);
      // now temp2 has the lowest of the three components
      if(red == temp2)
      {
        red += inc;
        red %= 256;
      }
      else if(green == temp2)
      {
        green += inc;
        green %= 256;
      }
      else if(blue == temp2)
      {
        blue += inc;
        blue %= 256;
      }
      return new Color(red, green, blue);
    }
  }
  
  
  

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