Java tutorial
/* =========================================================== * 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.] * * --------------------- * ScatterPlotDemo3.java * --------------------- * (C) Copyright 2004, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: ScatterPlotDemo3.java,v 1.12 2004/05/11 14:56:17 mungady Exp $ * * Changes * ------- * 11-May-2004 : Version 1 (DG); * */ package org.jfree.chart.demo; import java.awt.Point; import java.awt.geom.Point2D; import java.awt.geom.Rectangle2D; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartMouseEvent; import org.jfree.chart.ChartMouseListener; 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.data.xy.XYDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /** * A demo scatter plot with some code showing how to convert between Java2D coordinates and * (x, y) coordinates. */ public class ScatterPlotDemo3 extends ApplicationFrame implements ChartMouseListener { /** The panel used to display the chart. */ private ChartPanel chartPanel; /** * A demonstration application showing a scatter plot. * * @param title the frame title. */ public ScatterPlotDemo3(final String title) { super(title); final XYDataset dataset = new SampleXYDataset2(); JFreeChart chart = createChart(dataset); chartPanel = new ChartPanel(chart); chartPanel.addChartMouseListener(this); chartPanel.setPreferredSize(new java.awt.Dimension(500, 270)); chartPanel.setVerticalAxisTrace(true); chartPanel.setHorizontalAxisTrace(true); // chartPanel.setVerticalZoom(true); // chartPanel.setHorizontalZoom(true); setContentPane(chartPanel); } /** * Creates a sample chart. * * @param dataset the dataset. * * @return A dataset. */ private JFreeChart createChart(XYDataset dataset) { final JFreeChart chart = ChartFactory.createScatterPlot("Scatter Plot Demo", "X", "Y", dataset, PlotOrientation.VERTICAL, true, true, false); // final Legend legend = chart.getLegend(); // if (legend instanceof StandardLegend) { // final StandardLegend sl = (StandardLegend) legend; // sl.setDisplaySeriesShapes(true); //} final NumberAxis domainAxis = (NumberAxis) chart.getXYPlot().getDomainAxis(); // domainAxis.setAutoRangeIncludesZero(false); return chart; } /** * Callback method for receiving notification of a mouse click on a chart. * * @param event information about the event. */ public void chartMouseClicked(ChartMouseEvent event) { int x = event.getTrigger().getX(); int y = event.getTrigger().getY(); // the following translation takes account of the fact that the chart image may // have been scaled up or down to fit the panel... Point2D p = chartPanel.translateScreenToJava2D(new Point(x, y)); // now convert the Java2D coordinate to axis coordinates... XYPlot plot = chartPanel.getChart().getXYPlot(); Rectangle2D dataArea = chartPanel.getChartRenderingInfo().getPlotInfo().getDataArea(); double xx = plot.getDomainAxis().java2DToValue(p.getX(), dataArea, plot.getDomainAxisEdge()); double yy = plot.getRangeAxis().java2DToValue(p.getY(), dataArea, plot.getRangeAxisEdge()); // just for fun, lets convert the axis coordinates back to component coordinates... double xxx = plot.getDomainAxis().valueToJava2D(xx, dataArea, plot.getDomainAxisEdge()); double yyy = plot.getRangeAxis().valueToJava2D(yy, dataArea, plot.getRangeAxisEdge()); Point2D p2 = chartPanel.translateJava2DToScreen(new Point2D.Double(xxx, yyy)); System.out .println("Mouse coordinates are (" + x + ", " + y + "), in data space = (" + xx + ", " + yy + ")."); System.out.println("--> (" + p2.getX() + ", " + p2.getY() + ")"); } /** * Callback method for receiving notification of a mouse movement on a chart. * * @param event information about the event. */ public void chartMouseMoved(ChartMouseEvent event) { // ignore } // **************************************************************************** // * 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. * // **************************************************************************** /** * Starting point for the demonstration application. * * @param args ignored. */ public static void main(final String[] args) { final ScatterPlotDemo3 demo = new ScatterPlotDemo3("Scatter Plot Demo 3"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }