GanttMeasure.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2012 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.turro.zkoss.svg;
 
public enum GanttMeasure {
  
  GANTT_BY_HOURS,
  GANTT_BY_DAYS,
  GANTT_BY_WEEKS,
  GANTT_BY_MONTHS,
  GANTT_BY_QUARTERS,
  GANTT_BY_YEARS;
  
  public double convert(double hours) {
    if(this.equals(GANTT_BY_DAYS)) {
      return toDays(hours);
    } else if(this.equals(GANTT_BY_WEEKS)) {
      return toWeeks(hours);
    } else if(this.equals(GANTT_BY_MONTHS)) {
      return toMonths(hours);
    } else if(this.equals(GANTT_BY_QUARTERS)) {
      return toQuarters(hours);
    } else if(this.equals(GANTT_BY_YEARS)) {
      return toYears(hours);
    }
    return hours;
  }
  
  private static final double SWITCH_MEASURE = 100.0d;
  
  public static GanttMeasure chooseMeasure(double hours) {
    if(hours > SWITCH_MEASURE) {
      if(toDays(hours) > SWITCH_MEASURE) {
        if(toWeeks(hours) > SWITCH_MEASURE) {
          if(toMonths(hours) > SWITCH_MEASURE) {
            if(toQuarters(hours) > SWITCH_MEASURE) {
              return GANTT_BY_YEARS;
            } else {
              return GANTT_BY_QUARTERS;
            }
          } else {
            return GANTT_BY_MONTHS;
          }
        } else {
          return GANTT_BY_WEEKS;
        }
      } else {
        return GANTT_BY_DAYS;
      }
    } else {
      return GANTT_BY_HOURS;
    }
  }
  
  public static double toDays(double hours) {
    return hours / 8.0d;
  }
  
  public static double toWeeks(double hours) {
    return hours / (8.0d * 5.0d);
  }
  
  public static double toMonths(double hours) {
    return hours / (8.0d * 22.0d);
  }
  
  public static double toQuarters(double hours) {
    return hours / (8.0d * 22.0d * 3.0d);
  }
  
  public static double toYears(double hours) {
    return hours / (8.0d * 22.0d * 12.0d);
  }
  
}