/** *   Copyright 2004 Carlos Silva A. *  *   Licensed 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 jgantt.model;import java.util.Calendar;import java.util.Date;import java.util.Enumeration;import java.util.Vector;/** * ViewOptions controla el como la visualizacion debe realizarse.  * Ademas calcula cuanta informacion debe mostrarse.</p>  *  * <p>$Date: 2005/06/13 23:43:27 $</p>  * @version $Revision: 1.6 $ * @author Carlos Silva */public class ViewOptions extends ViewOptionsData {	/**	 * Milisegundos por pixel	 */	public long msPixel = 0;	/**	 * tiempos en las divisiones	 * que no haya mas de 300 divisiones en la pantalla (aprox 3.000 pixels	 */	public long divTimes[] = new long[300];	/**	 * Pixeles donde se producen las divisiones	 * que no haya mas de 500 divisiones en la pantalla	 */	public int divX[] = new int[300];		/**	 * numero de divisiones	 */	public int divCount = 0;	/**	 * tiempo en la division 0	 */	public long t0 = 0;	/**	 * Proyecto asociado	 */	Project project = null;	/**	 * Constructor reservado al paquete.	 * @param p project asociado	 */	ViewOptions(Project p) {		this.project = p;		setStartDate(project.getMainTask().getStartDate(), startOffset);	}	/**	 * Asigna la fecha de inicio de la carta gantt	 *	 */	public void setStartDate(Date d, int days) {		Calendar c = Calendar.getInstance();		c.setTime(d);		c.set(java.util.Calendar.HOUR_OF_DAY, 0);		c.set(java.util.Calendar.MINUTE, 0);		c.set(java.util.Calendar.SECOND, 0);		c.set(java.util.Calendar.MILLISECOND, 0);		c.add(java.util.Calendar.DATE, days);		// Fecha de inicio de la carta gantt 				startDate = c.getTime();		t0 = c.getTime().getTime();		notifyObservers();	}	/**	 * Recalcula el inicio de la carta gantt, el ancho de las divisiones menores	 * y los tiempos asociados a cada division menor	 *	 */	public void recalc() {		t0 = startDate.getTime();		// determinar el ancho de la divisio menor		switch (minDivUnit) {			case Calendar.DAY_OF_MONTH :				if (minDivFormat==java.util.Calendar.DATE)					divWidth = stdDivWidth*3/2;				else					divWidth = stdDivWidth;				msPixel = (msDay * minDivMult) / divWidth;				break;			case Calendar.WEEK_OF_YEAR :				divWidth = stdDivWidth * 3;				msPixel = (msWeek * minDivMult) / divWidth;				break;			case Calendar.MONTH :				divWidth = stdDivWidth * 5;				msPixel = (msMonth * minDivMult) / divWidth;				break;		}		// calcular la fecha de inicio de la gantt como 5 dias antes de empezar el proyecto		Calendar c = Calendar.getInstance();		c.setTime(startDate);		divCount = 0;		for (int x = 0;(x <= 1500) && (divCount < 500);) {			long t = c.getTime().getTime();			x = (int) ((t - t0) / msPixel);			divX[divCount] = x;			divTimes[divCount] = t;			c.add(minDivUnit, minDivMult);			divCount++;		}		// ancho interno		int width =			(int) ((project.getMainTask().getFinishDate().getTime()				- project.getMainTask().getStartDate().getTime())				/ msPixel);	}	public void setTopRow(int tr){		topRow=tr;		notifyObservers();	}	public int getTopRow(){		return topRow;	}	// Observadores		transient Vector observers = new Vector();	public void addObserver(Observer o) {		observers.addElement(o);	}	public void removeObserver(Observer o) {		observers.remove(o);	}	public void notifyObservers() {		recalc();		for (Enumeration e = observers.elements(); e.hasMoreElements();) {			Observer ob = (Observer) e.nextElement();			ob.viewOptionsChanged();		}	}	public interface Observer {		public void viewOptionsChanged();	}	}