Java tutorial
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See the GNU Lesser General Public License for more details see http://opensource.org/licenses/lgpl-license.php. http://www.SOCR.ucla.edu http://wiki.stat.ucla.edu/socr It's Online, Therefore, It Exists! ***************************************************/ package edu.ucla.stat.SOCR.motionchart; import org.jfree.chart.ChartPanel; import org.jfree.chart.ChartTheme; import org.jfree.chart.JFreeChart; import org.jfree.chart.StandardChartTheme; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.event.ChartChangeEvent; import org.jfree.chart.event.ChartChangeListener; import org.jfree.chart.labels.ItemLabelAnchor; import org.jfree.chart.labels.ItemLabelPosition; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYBubbleRenderer; import org.jfree.chart.title.TextTitle; import org.jfree.data.general.DatasetChangeEvent; import org.jfree.data.general.DatasetChangeListener; import org.jfree.ui.TextAnchor; import javax.swing.event.EventListenerList; import java.awt.*; /** * Package: edu.ucla.stat.SOCR.motionchart * User: Khashim * Date: Sep 15, 2008 * Time: 2:58:23 PM * * @author Jameel */ public class MotionChart implements DatasetChangeListener, ChartChangeListener { private MotionDataSet dataset; private MotionBubbleRenderer renderer; private XYPlot plot; private JFreeChart chart; private ChartPanel chartPanel; private static ChartTheme currentTheme = new StandardChartTheme("JFree"); /** Storage for registered change listeners. */ private EventListenerList changeListeners; /** * A flag that can be used to enable/disable notification of chart change * events. */ private boolean notify; /** * Creates a new chart based on the supplied dataset. The chart will have * a default title of "Motion Chart". * A default font is used for the title, and the chart will * not have a legend. * * @param dataset the dataset (<code>null</code> not permitted). */ public MotionChart(MotionDataSet dataset) { this("SOCR Motion Charts", JFreeChart.DEFAULT_TITLE_FONT, dataset, false); } /** * Creates a new chart with the given title and dataset. * A default font is used for the title, and the chart will * not have a legend added automatically. * * @param title the chart title (<code>null</code> permitted). * @param dataset the dataset (<code>null</code> not permitted). */ public MotionChart(String title, MotionDataSet dataset) { this(title, JFreeChart.DEFAULT_TITLE_FONT, dataset, false); } /** * Creates a new chart with the given title and dataset. The * <code>createLegend</code> argument specifies whether or not a legend * should be added to the chart. * * @param title the chart title (<code>null</code> permitted). * @param titleFont the font for displaying the chart title * (<code>null</code> permitted). * @param dataset the dataset * (<code>null</code> not permitted). * @param createLegend a flag indicating whether or not a legend should * be created for the chart. */ public MotionChart(String title, Font titleFont, MotionDataSet dataset, boolean createLegend) { if (dataset == null) { throw new NullPointerException("Null 'dataset' argument."); } this.dataset = dataset; NumberAxis xAxis = new NumberAxis(dataset.getXLabel()); xAxis.setAutoRangeIncludesZero(false); xAxis.setUpperMargin(0.20); NumberAxis yAxis = new NumberAxis(dataset.getYLabel()); yAxis.setAutoRangeIncludesZero(false); yAxis.setUpperMargin(0.20); plot = new XYPlot(dataset, xAxis, yAxis, null); renderer = new MotionBubbleRenderer(dataset, XYBubbleRenderer.SCALE_ON_DOMAIN_AXIS); renderer.setBaseToolTipGenerator(new MotionToolTipGenerator()); renderer.setBaseItemLabelGenerator(new MotionItemLabelGenerator()); renderer.setBasePositiveItemLabelPosition( new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BOTTOM_CENTER)); plot.setRenderer(renderer); plot.setOrientation(PlotOrientation.VERTICAL); dataset.addChangeListener(this); chart = new JFreeChart(title, titleFont, plot, createLegend); chart.addChangeListener(this); currentTheme.apply(chart); chartPanel = new ChartPanel(chart); chartPanel.addChartMouseListener(new MotionMouseListener()); } public JFreeChart getChart() { return chart; } public ChartPanel getChartPanel() { return chartPanel; } public MotionBubbleRenderer getRenderer() { return renderer; } public MotionDataSet getDataset() { return dataset; } public XYPlot getPlot() { return plot; } /** * Returns the main chart title. * * @return The chart title (possibly <code>null</code>). * * @see #setTitle(TextTitle) */ public TextTitle getTitle() { return chart.getTitle(); } /** * Sets the main title for the chart and sends a {@link org.jfree.chart.event.ChartChangeEvent} * to all registered listeners. If you do not want a title for the * chart, set it to <code>null</code>. * * @param title the title (<code>null</code> permitted). * * @see #getTitle() */ public void setTitle(TextTitle title) { chart.setTitle(title); } /** * Sets the chart title and sends a {@link org.jfree.chart.event.ChartChangeEvent} to all * registered listeners. This is a convenience method that ends up calling * the {@link #setTitle(TextTitle)} method. If there is an existing title, * its text is updated, otherwise a new title using the default font is * added to the chart. If <code>text</code> is <code>null</code> the chart * title is set to <code>null</code>. * * @param text the title text (<code>null</code> permitted). * * @see #getTitle() */ public void setTitle(String text) { chart.setTitle(text); } /** * Receives notification of an dataset change event. * * @param event information about the event. */ public void datasetChanged(DatasetChangeEvent event) { plot.getDomainAxis().setLabel(dataset.getXLabel()); plot.getRangeAxis().setLabel(dataset.getYLabel()); } /** * Receives notification of a chart change event. * * @param event the event. */ public void chartChanged(ChartChangeEvent event) { notifyListeners(event); } /** * Returns a flag that controls whether or not change events are sent to * registered listeners. * * @return A boolean. * * @see #setNotify(boolean) */ public boolean isNotify() { return this.notify; } /** * Sets a flag that controls whether or not listeners receive * {@link ChartChangeEvent} notifications. * * @param notify a boolean. * * @see #isNotify() */ public void setNotify(boolean notify) { this.notify = notify; // if the flag is being set to true, there may be queued up changes... if (notify) { notifyListeners(new ChartChangeEvent(this)); } } /** * Registers an object for notification of changes to the chart. * * @param listener the listener (<code>null</code> not permitted). * * @see #removeChangeListener(ChartChangeListener) */ public void addChangeListener(ChartChangeListener listener) { if (listener == null) { throw new IllegalArgumentException("Null 'listener' argument."); } this.changeListeners.add(ChartChangeListener.class, listener); } /** * Deregisters an object for notification of changes to the chart. * * @param listener the listener (<code>null</code> not permitted) * * @see #addChangeListener(ChartChangeListener) */ public void removeChangeListener(ChartChangeListener listener) { if (listener == null) { throw new IllegalArgumentException("Null 'listener' argument."); } this.changeListeners.remove(ChartChangeListener.class, listener); } /** * Sends a default {@link ChartChangeEvent} to all registered listeners. * <P> * This method is for convenience only. */ public void fireChartChanged() { ChartChangeEvent event = new ChartChangeEvent(this); notifyListeners(event); } /** * Sends a {@link ChartChangeEvent} to all registered listeners. * * @param event information about the event that triggered the * notification. */ protected void notifyListeners(ChartChangeEvent event) { if (this.notify) { Object[] listeners = this.changeListeners.getListenerList(); for (int i = listeners.length - 2; i >= 0; i -= 2) { if (listeners[i] == ChartChangeListener.class) { ((ChartChangeListener) listeners[i + 1]).chartChanged(event); } } } } /** * Tests this chart for equality with another object. * * @param obj the object (<code>null</code> permitted). * * @return A boolean. */ public boolean equals(Object obj) { if (obj == this) { return true; } if (!(obj instanceof MotionChart)) { return false; } MotionChart that = (MotionChart) obj; if (!chart.equals(that.chart)) { return false; } if (this.notify != that.notify) { return false; } return true; } /** * Clones the object, and takes care of listeners. * Note: caller shall register its own listeners on cloned graph. * * @return A clone. * * @throws CloneNotSupportedException if the chart is not cloneable. */ public Object clone() throws CloneNotSupportedException { MotionChart chart = (MotionChart) super.clone(); chart.chart = (JFreeChart) this.chart.clone(); chart.plot = (XYPlot) this.plot.clone(); chart.chartPanel = new ChartPanel(chart.chart); chart.dataset = (MotionDataSet) this.dataset.clone(); chart.renderer = (MotionBubbleRenderer) renderer.clone(); chart.changeListeners = new EventListenerList(); return chart; } }