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DecimalAxisUtils.java

/*
 * Copyright 2007-2009 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
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 */

package org.netbeans.lib.profiler.charts.axis;

/**
 *
 * @author Jiri Sedlacek
 */
00032 public class DecimalAxisUtils {

    public static final long[] decimalUnitsGrid = new long[] { 1, 2, 5 };

    public static long getDecimalUnits(double scale, int minDistance) {
        if (Double.isNaN(scale) || scale == Double.POSITIVE_INFINITY || scale <= 0) return -1;

        long decimalFactor = 1;

        while (true) {
            for (int i = 0; i < decimalUnitsGrid.length; i++)
                if ((decimalUnitsGrid[i] * scale * decimalFactor) >= minDistance)
                    return decimalUnitsGrid[i] * decimalFactor;

            decimalFactor *= 10;
        }
    }

}

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