Java tutorial
package view; /* =========================================================== * 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.] * * --------------- * GanttDemo1.java * --------------- * (C) Copyright 2002-2004, by Object Refinery Limited. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: GanttDemo1.java,v 1.12 2004/04/26 19:11:54 taqua Exp $ * * Changes * ------- * 06-Jun-2002 : Version 1 (DG); * 10-Oct-2002 : Modified to use DemoDatasetFactory (DG); * 10-Jan-2003 : Renamed GanttDemo --> GanttDemo1 (DG); * 16-Oct-2003 : Shifted dataset from DemoDatasetFactory to this class (DG); * */ import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Calendar; import java.util.Date; import java.util.Locale; import javax.swing.JFrame; import model.Activity; import model.Project; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.data.category.IntervalCategoryDataset; import org.jfree.data.gantt.Task; import org.jfree.data.gantt.TaskSeries; import org.jfree.data.gantt.TaskSeriesCollection; import org.jfree.data.time.SimpleTimePeriod; import org.jfree.ui.ApplicationFrame; /** * A simple demonstration application showing how to create a Gantt chart. * <P> * This demo is intended to show the conceptual approach rather than being a polished * implementation. * * */ public class GanttView extends JFrame { /** * Creates a new demo. * * @param title the frame title. */ Project proj; public GanttView(final String title, Project parentProject) { super(title); setProj(parentProject); final IntervalCategoryDataset dataset = createDataset(); final JFreeChart chart = createChart(dataset, title); // add the chart to a panel... final ChartPanel chartPanel = new ChartPanel(chart); chartPanel.setPreferredSize(new java.awt.Dimension(950, 500)); //changes size of window setContentPane(chartPanel); } // **************************************************************************** // * JFREECHART DEVELOPER GUIDE * // * The JFreeChart Developer Guide, written by David Gilbert, is available * // * to purchase from Object Refinery Limited: * // * * // * http://www.object-refinery.com/jfreechart/guide.html * // * * // * Sales are used to provide funding for the JFreeChart project - please * // * support us so that we can continue developing free software. * // **************************************************************************** /** * Creates a sample dataset for a Gantt chart. * * @return The dataset. */ public IntervalCategoryDataset createDataset() { /*Task is polymorphic : Task(java.lang.String description, java.util.Date start, java.util.Date end) Creates a new task. Task(java.lang.String description, TimePeriod duration) Creates a new task. */ ArrayList<Activity> projActs = getProj().getProjectActivities(); final TaskSeries s1 = new TaskSeries("Scheduled"); for (Activity act : projActs) { Calendar start = getStartDate(act.getStartDate()); int year = start.get(Calendar.YEAR); int month = start.get(Calendar.MONTH); int day = start.get(Calendar.DAY_OF_MONTH); Calendar end = getStartDate(act.getFinishDate()); int endyear = end.get(Calendar.YEAR); int endmonth = end.get(Calendar.MONTH); int endday = end.get(Calendar.DAY_OF_MONTH); s1.add(new Task(act.getName(), new SimpleTimePeriod(date(day, month, year), date(endday, endmonth, endyear)))); } TaskSeriesCollection collection = new TaskSeriesCollection(); collection.add(s1); return collection; } /** * Utility method for creating <code>Date</code> objects. * * @param day the date. * @param month the month. * @param year the year. * * @return a date. */ private Date date(final int day, final int month, final int year) { final Calendar calendar = Calendar.getInstance(); calendar.set(year, month, day); final Date result = calendar.getTime(); return result; } /** * Creates a chart. * * @param dataset the dataset. * * @return The chart. */ private JFreeChart createChart(final IntervalCategoryDataset dataset, String title) { final JFreeChart chart = ChartFactory.createGanttChart(title, // chart title "ACTIVITY", // domain axis label "DATE", // range axis label dataset, // data true, // include legend false, // tooltips false // urls ); return chart; } public Calendar getStartDate(String startDate) { Calendar cal = Calendar.getInstance(); SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd HH:mm:ss z yyyy", Locale.CANADA); try { cal.setTime(sdf.parse(startDate)); } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } // all done return cal; } public Project getProj() { return proj; } public void setProj(Project proj) { this.proj = proj; } }