package fr.ifremer.tutti.ui.swing.util;
   
   /*
    * #%L
    * Tutti :: UI
    * $Id:$
    * $HeadURL:$
    * %%
    * Copyright (C) 2012 - 2014 Ifremer
   * %%
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as
   * published by the Free Software Foundation, either version 3 of the
   * License, or (at your option) any later version.
   * 
   * This program 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 for more details.
   * 
   * You should have received a copy of the GNU General Public
   * License along with this program.  If not, see
   * <http://www.gnu.org/licenses/gpl-3.0.html>.
   * #L%
   */
  
  /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2014, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
   * Other names may be trademarks of their respective owners.]
   *
   * -------------------------
   * NumberTickUnitSource.java
   * -------------------------
   * (C) Copyright 2014, by Object Refinery Limited.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes
   * -------
   * 18-Mar-2014 : Version 1 (DG);
   *
   */
  
  import org.jfree.chart.axis.NumberTickUnit;
  import org.jfree.chart.axis.TickUnit;
  import org.jfree.chart.axis.TickUnitSource;
  
  import java.io.Serializable;
  import java.text.DecimalFormat;
  import java.text.NumberFormat;
  
  /**
   * TickUnitSource for the frequency chart
   *
   * @author Kevin Morin (Code Lutin)
   * @since 3.10
   */
  public class TuttiNumberTickUnitSource implements TickUnitSource, Serializable {
  
      private boolean integers;
  
      private int power = 0;
  
      private int factor = 1;
  
      /**
       * Creates a new instance.
       *
       * @param integers show integers only.
       */
      public TuttiNumberTickUnitSource(boolean integers) {
  
          this.integers = integers;
          this.power = 0;
          this.factor = 1;
      }
 
     @Override
     public TickUnit getLargerTickUnit(TickUnit unit) {
         TickUnit t = getCeilingTickUnit(unit);
         if (t.equals(unit)) {
             next();
             t = new NumberTickUnit(getTickSize(), getTickLabelFormat(),
                                    getMinorTickCount());
         }
         return t;
     }
 
     @Override
     public TickUnit getCeilingTickUnit(TickUnit unit) {
         return getCeilingTickUnit(unit.getSize());
     }
 
     @Override
     public TickUnit getCeilingTickUnit(double size) {
         if (Double.isInfinite(size)) {
             throw new IllegalArgumentException("Must be finite.");
         }
         this.power = (int) Math.ceil(Math.log10(size));
         if (this.integers) {
             power = Math.max(this.power, 0);
         }
         this.factor = 1;
         boolean done = false;
         // step down in size until the current size is too small or there are
         // no more units
         while (!done) {
             done = !previous();
             if (getTickSize() < size) {
                 next();
                 done = true;
             }
         }
         return new NumberTickUnit(getTickSize(), getTickLabelFormat(),
                                   getMinorTickCount());
     }
 
     private boolean next() {
         if (factor == 1) {
             factor = 5;
             return true;
         }
         if (factor == 5) {
             if (power == 300) {
                 return false;
             }
             power++;
             factor = 1;
             return true;
         }
         throw new IllegalStateException("We should never get here.");
     }
 
     private boolean previous() {
         if (factor == 1) {
             if (this.integers && power == 0 || power == -1) {
                 return false;
             }
             factor = 5;
             power--;
             return true;
         }
         if (factor == 5) {
             factor = 1;
             return true;
         }
         throw new IllegalStateException("We should never get here.");
     }
 
     private double getTickSize() {
         return this.factor * Math.pow(10.0, this.power);
     }
 
     private DecimalFormat dfNeg4 = new DecimalFormat("0.0000");
 
     private DecimalFormat dfNeg3 = new DecimalFormat("0.000");
 
     private DecimalFormat dfNeg2 = new DecimalFormat("0.00");
 
     private DecimalFormat dfNeg1 = new DecimalFormat("0.0");
 
     private DecimalFormat df0 = new DecimalFormat("#,##0");
 
     private DecimalFormat df = new DecimalFormat("#.######E0");
 
     private NumberFormat getTickLabelFormat() {
         if (power == -4) {
             return dfNeg4;
         }
         if (power == -3) {
             return dfNeg3;
         }
         if (power == -2) {
             return dfNeg2;
         }
         if (power == -1) {
             return dfNeg1;
         }
         if (power >= 0 && power <= 6) {
             return df0;
         }
         return df;
     }
 
     private int getMinorTickCount() {
         return (int) (getTickSize() * (integers ? 1 : 2));
     }
 
     @Override
     public boolean equals(Object obj) {
         if (obj == this) {
             return true;
         }
         if (!(obj instanceof TuttiNumberTickUnitSource)) {
             return false;
         }
         TuttiNumberTickUnitSource that = (TuttiNumberTickUnitSource) obj;
         if (this.integers != that.integers) {
             return false;
         }
         if (this.power != that.power) {
             return false;
         }
         if (this.factor != that.factor) {
             return false;
         }
         return true;
     }
 }