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JMeter example source code file (ColorHelper.java)

This example JMeter source code file (ColorHelper.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - JMeter tags/keywords

awt, color, color, colorhelper, colorhelper

The JMeter ColorHelper.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.apache.jmeter.util;

import java.awt.Color;

/**
 * This class contains the static utility methods to manipulate colors.
 *
 * @version $Revision: 674365 $
 */
public final class ColorHelper {
    /**
     * Private constructor to prevent instantiation.
     */
    private ColorHelper() {
    }

    /**
     * Given the <code>Color, 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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