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.chart.demo; import java.awt.Color; import java.awt.Paint; import java.beans.PropertyChangeListener; 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.labels.ItemLabelAnchor; import org.jfree.chart.labels.ItemLabelPosition; import org.jfree.chart.labels.StandardCategoryItemLabelGenerator; import org.jfree.chart.plot.CategoryMarker; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.renderer.category.BarRenderer; import org.jfree.chart.renderer.category.CategoryItemRenderer; import org.jfree.data.category.CategoryDataset; import org.jfree.data.general.DatasetUtilities; import org.jfree.ui.Layer; import org.jfree.ui.LengthAdjustmentType; import org.jfree.ui.RectangleAnchor; import org.jfree.ui.TextAnchor; import edu.ucla.stat.SOCR.chart.ChartGenerator_JTable; import edu.ucla.stat.SOCR.chart.SuperCategoryChart_Bar; import edu.ucla.stat.SOCR.chart.gui.SOCRCategorySeriesLabelGenerator; import edu.ucla.stat.SOCR.chart.gui.CustomBarRenderer; /** * A bar chart that uses a custom renderer to display different colors within a * series. No legend is displayed because there is only one series but the * colors are not consistent. Also, a domain marker is used to highlight one * category. */ public class BarChartDemo3 extends SuperCategoryChart_Bar implements PropertyChangeListener { /** * sample code showing how to create a chart using ChartGenerator_JTable class */ public void doTest() { JFreeChart chart; ChartGenerator_JTable chartMaker = new ChartGenerator_JTable(); resetChart(); showMessageDialog(chartTitle + " doTest get called!"); int no_series = dataTable.getRowCount() - 1; int no_category = dataTable.getColumnCount() - 2; int[][] pairs = new int[no_category][2]; for (int i = 0; i < no_category; i++) { pairs[i][0] = i + 1; //column i store category i pairs[i][1] = 0; //column 0 stores series name } chart = chartMaker.getCategoryChart("Bar", chartTitle, "Category", "value", dataTable, no_category, pairs, ""); chartPanel = new ChartPanel(chart, false); setChart(); } /** * Creates a sample dataset. * * @return a sample dataset. */ protected CategoryDataset createDataset(boolean isDemo) { if (isDemo) { double[][] data = new double[][] { { 4.0, 3.0, -2.0, 3.0, 6.0 } }; return DatasetUtilities.createCategoryDataset("Series ", "Category ", data); } else return super.createDataset(false); } /** * Creates a sample chart. * * @param dataset the dataset. * * @return a sample chart. */ protected JFreeChart createChart(CategoryDataset dataset) { JFreeChart chart = ChartFactory.createBarChart(chartTitle, // chart title domainLabel, // domain axis label rangeLabel, // range axis label dataset, // data PlotOrientation.VERTICAL, // the plot orientation !legendPanelOn, // include legend true, false); chart.setBackgroundPaint(Color.lightGray); // get a reference to the plot for further customisation... CategoryPlot plot = (CategoryPlot) chart.getPlot(); plot.setNoDataMessage("NO DATA!"); CategoryItemRenderer renderer = new CustomBarRenderer(new Paint[] { Color.red, Color.blue, Color.green, Color.yellow, Color.orange, Color.cyan, Color.magenta, Color.blue }); renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator()); renderer.setBaseItemLabelsVisible(true); ItemLabelPosition p = new ItemLabelPosition(ItemLabelAnchor.CENTER, TextAnchor.CENTER, TextAnchor.CENTER, 45.0); renderer.setBasePositiveItemLabelPosition(p); plot.setRenderer(renderer); CategoryMarker marker = new CategoryMarker("Category 3"); marker.setLabel("Special"); marker.setPaint(new Color(0xDD, 0xFF, 0xDD, 0x80)); marker.setAlpha(0.5f); marker.setLabelAnchor(RectangleAnchor.TOP_LEFT); marker.setLabelTextAnchor(TextAnchor.TOP_LEFT); marker.setLabelOffsetType(LengthAdjustmentType.CONTRACT); plot.addDomainMarker(marker, Layer.BACKGROUND); // change the margin at the top of the range axis... NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis(); rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); rangeAxis.setLowerMargin(0.15); rangeAxis.setUpperMargin(0.15); BarRenderer seriesRenderer = (BarRenderer) plot.getRenderer(); seriesRenderer.setLegendItemLabelGenerator(new SOCRCategorySeriesLabelGenerator()); setCategorySummary(dataset); return chart; } }