sf.util.Color Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of schemacrawler Show documentation

SchemaCrawler is an open-source Java API that makes working with database metadata as easy as working with plain old Java objects. SchemaCrawler is also a database schema discovery and comprehension, and schema documentation tool. You can search for database schema objects using regular expressions, and output the schema and data in a readable text format. The output is designed to be diff-ed against other database schemas.

There is a newer version: 16.24.2

Show newest version

/*
 *
 * SchemaCrawler
 * http://www.schemacrawler.com
 * Copyright (c) 2000-2016, Sualeh Fatehi.
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 */
package sf.util;


/**
 * Color breaks the dependency on java.awt.Color. The AWT comes with a
 * lot of baggage, and is not part of Java Compact Profile 2.
 *
 * @author Sualeh Fatehi
 */
public final class Color
{

  public static Color white = new Color(255, 255, 255);

  /**
   * 
   * Converting from HSV (HSB in Java) to RGB without using
   * java.awt.Color
   */
  public static Color fromHSV(final float hue,
                              final float saturation,
                              final float value)
  {
    final float normaliedHue = (hue - (float) Math.floor(hue));
    final int h = (int) (normaliedHue * 6);
    final float f = normaliedHue * 6 - h;
    final float p = value * (1 - saturation);
    final float q = value * (1 - f * saturation);
    final float t = value * (1 - (1 - f) * saturation);

    switch (h)
    {
      case 0:
        return rgbToString(value, t, p);
      case 1:
        return rgbToString(q, value, p);
      case 2:
        return rgbToString(p, value, t);
      case 3:
        return rgbToString(p, q, value);
      case 4:
        return rgbToString(t, p, value);
      case 5:
        return rgbToString(value, p, q);
      default:
        throw new RuntimeException(String.format(
                                                 "Could not convert from HSV (%f, %f, %f) to RGB",
                                                 normaliedHue,
                                                 saturation,
                                                 value));
    }
  }

  public static Color rgbToString(final float r, final float g, final float b)
  {
    return new Color((int) (r * 255 + 0.5),
                     (int) (g * 255 + 0.5),
                     (int) (b * 255 + 0.5));
  }

  private final int r, g, b;

  private Color(final int r, final int g, final int b)
  {
    if (r < 0)
    {
      this.r = 0;
    }
    else if (r > 255)
    {
      this.r = 255;
    }
    else
    {
      this.r = r;
    }

    if (g < 0)
    {
      this.g = 0;
    }
    else if (g > 255)
    {
      this.g = 255;
    }
    else
    {
      this.g = g;
    }

    if (b < 0)
    {
      this.b = 0;
    }
    else if (b > 255)
    {
      this.b = 255;
    }
    else
    {
      this.b = b;
    }
  }

  @Override
  public String toString()
  {
    final int rgb = (r & 0xFF) << 16 | (g & 0xFF) << 8 | (b & 0xFF) << 0;

    final String htmlColor = "#" + Integer.toHexString(rgb).toUpperCase();
    return htmlColor;
  }

}