taskseries.java

这是一个segy数据显示程序

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, 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., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ---------------
 * TaskSeries.java
 * ---------------
 * (C) Copyright 2002-2004, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: TaskSeries.java,v 1.6 2004/04/26 19:15:21 taqua Exp $
 *
 * Changes
 * -------
 * 06-Jun-2002 : Version 1 (DG);
 * 07-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 24-Oct-2002 : Added methods to get TimeAllocation by task index (DG);
 * 10-Jan-2003 : Renamed GanttSeries --> TaskSeries (DG);
 *
 */

package org.jfree.data.gantt;

import java.util.Collections;
import java.util.List;

import org.jfree.data.Series;

/**
 * A series that contains zero, one or many {@link Task} objects.
 * <P>
 * This class is used as a building block for the {@link TaskSeriesCollection} class that
 * can be used to construct basic Gantt charts.
 *
 */
public class TaskSeries extends Series {

    /** Storage for the tasks in the series. */
    private List tasks;

    /**
     * Constructs a new series with the specified name.
     *
     * @param name  the series name.
     */
    public TaskSeries(final String name) {
        super(name);
        this.tasks = new java.util.ArrayList();
    }

    /**
     * Adds a task to the series.
     *
     * @param task  the task.
     */
    public void add(final Task task) {
        this.tasks.add(task);
        fireSeriesChanged();
    }

    /**
     * Removes a task from the series.
     *
     * @param task  the task.
     */
    public void remove(final Task task) {
        this.tasks.remove(task);
        fireSeriesChanged();
    }

    /**
     * Removes all tasks.
     */
    public void removeAll() {
        this.tasks.clear();
        fireSeriesChanged();
    }

    /**
     * Returns the tasks.
     *
     * @return the tasks.
     */
    public List getTasks() {
        return Collections.unmodifiableList(this.tasks);
    }

    /**
     * Returns a task from the series.
     *
     * @param index  the task index (zero-based).
     *
     * @return the task.
     */
    public Task get(final int index) {
        return (Task) this.tasks.get(index);
    }

    /**
     * Returns the number of items in the series.
     *
     * @return the item count.
     */
    public int getItemCount() {
        return this.tasks.size();
    }

}