Java tutorial
/* =========================================================== * JChart : 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.] * * -------------------- * TimeSeriesDemo5.java * -------------------- * (C) Copyright 2001-2004, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: TimeSeriesDemo5.java,v 1.12 2004/04/26 19:12:03 taqua Exp $ * * Changes (from 24-Apr-2002) * -------------------------- * 24-Apr-2002 : Added standard header (DG); * 10-Oct-2002 : Renamed JFreeChartDemo2 --> TimeSeriesDemo5 (DG); * */ package chart; import entity.NSubsequence; import entity.NTimeSeries; import java.awt.Color; import java.awt.Paint; import java.util.ArrayList; import java.util.List; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; import org.jfree.data.general.SeriesException; import org.jfree.data.xy.XYDataset; import org.jfree.data.xy.XYSeries; import org.jfree.data.xy.XYSeriesCollection; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /** * A time series chart with 4000 data points, to get an idea of how JChart * performs with a larger dataset. You can see that it slows down significantly, * so this needs to be worked on (4000 points is not that many!). * */ public class JChartSegment extends ApplicationFrame { /** * Creates a new demo instance. * * @param title the frame title. */ private JChartSegment(final String title, NTimeSeries series, List<NSubsequence> subsequence) { super(title); final XYDataset dataset = createDataset(series); final JFreeChart chart = createChart(dataset, subsequence); final ChartPanel chartPanel = new ChartPanel(chart); chartPanel.setPreferredSize(new java.awt.Dimension(500, 270)); chartPanel.setMouseZoomable(true, false); setContentPane(chartPanel); } /** * Creates a sample dataset. * * @return A sample dataset. */ private XYDataset createDataset(NTimeSeries data) { final XYSeries series = new XYSeries(""); List<Double> lst = (data.getRawData() == null || data.getRawData().isEmpty()) ? data.getData() : data.getRawData(); int size = lst.size(); for (int i = 0; i < size; i++) { try { series.add(i, lst.get(i)); } catch (SeriesException e) { System.err.println("Error adding to series"); } } return new XYSeriesCollection(series); } /** * Creates a sample chart. * * @param dataset the dataset. * * @return A sample chart. */ private JFreeChart createChart(final XYDataset dataset, List<NSubsequence> subsequence) { final JFreeChart chart = ChartFactory.createXYLineChart("Test", "Time", "Value", dataset, PlotOrientation.VERTICAL, false, false, false); chart.setBackgroundPaint(Color.WHITE); final XYPlot plot = chart.getXYPlot(); plot.setBackgroundPaint(Color.white); plot.setDomainGridlinePaint(Color.white); plot.setDomainCrosshairVisible(true); plot.setRangeCrosshairVisible(true); MyRender renderer = new MyRender(dataset, subsequence); plot.setRenderer(renderer); renderer.setSeriesShapesVisible(0, false); chart.setBackgroundPaint(Color.white); NumberAxis yAxis = (NumberAxis) plot.getRangeAxis(); yAxis.setAutoRangeIncludesZero(false); return chart; } private static class MyRender extends XYLineAndShapeRenderer { XYDataset dataset; List<NSubsequence> subsequences; List<Color> colors; int index; public MyRender(XYDataset dataset, List<NSubsequence> subsequences) { this.dataset = dataset; this.subsequences = subsequences; colors = new ArrayList<Color>(); colors.add(Color.yellow); colors.add(Color.red); colors.add(Color.blue); colors.add(Color.green); index = 0; } @Override public Paint getItemPaint(int row, int col) { Paint cpaint = getItemColor(row, col); if (cpaint == null) { cpaint = super.getItemPaint(row, col); } return cpaint; } public Color getItemColor(int row, int col) { double x = dataset.getXValue(row, col); int i = 0; for (NSubsequence anoma : this.subsequences) { if (x >= anoma.getStart() && x <= anoma.getEnd()) { return colors.get(i % 4); } i++; } return Color.black; } } public static void drawChart(NTimeSeries series, List<NSubsequence> subsequences) { final String title = "Time Series"; final JChartSegment demo = new JChartSegment(title, series, subsequences); demo.pack(); RefineryUtilities.positionFrameRandomly(demo); demo.setVisible(true); } }