problem in displaying text in item label in JFreeChart

[Diwakar Chittora]

Hi All,
I dont know whether this is the right place or not to post the queries related to jfreechart here .

I am facing a problem in displaying the text inside the item label in jfreeChart. I am trying to print the text in 2 lines one below the other at the top of each bar in waterfall chart.
Please find the code below :

import java.awt.Color;
import java.text.DecimalFormat;
 
import org.apache.tools.ant.listener.AnsiColorLogger;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAnchor;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.CategoryLabelPosition;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.CategoryLabelWidthType;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.labels.CategoryLabelGenerator;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.labels.StandardCategoryLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.Plot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.AbstractCategoryItemRenderer;
import org.jfree.chart.renderer.AbstractRenderer;
import org.jfree.chart.renderer.BarRenderer;
import org.jfree.chart.renderer.category.CategoryItemRenderer;
import org.jfree.chart.renderer.category.CategoryItemRendererState;
import org.jfree.chart.renderer.category.WaterfallBarRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.text.TextBlockAnchor;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RectangleAnchor;
import org.jfree.ui.RefineryUtilities;
import org.jfree.ui.TextAnchor;
 
import com.lowagie.text.Font;
 
/**
 * A sample waterfall chart.
 */
public class Waterfall extends ApplicationFrame {
 
     private static final int WIDTHTOTAL = 782;
        WaterfallBarRenderer bar = new WaterfallBarRenderer();
       private static final int GAP = 10;
       private static final int WIDTHPLOT = 420;
       private static final int MARGIN = ((WIDTHTOTAL - WIDTHPLOT) / 2);
       private static final int LEGENDPREFEREDSIZE = MARGIN - (2 * GAP);
       private ItemLabelPosition valNegPostion = new ItemLabelPosition(ItemLabelAnchor.OUTSIDE6, TextAnchor.TOP_CENTER, TextAnchor.CENTER, 0.0);
       private ItemLabelPosition valPosPostion = new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BOTTOM_CENTER, TextAnchor.CENTER, 0.0);
       private ItemLabelPosition perNegPostion = new ItemLabelPosition(ItemLabelAnchor.CENTER, TextAnchor.CENTER, TextAnchor.CENTER, 0.0);
       private ItemLabelPosition perPosPostion = new ItemLabelPosition(ItemLabelAnchor.CENTER, TextAnchor.CENTER, TextAnchor.CENTER, 0.0);
       /**
     * Creates a new WaterFall Chart demo.
     *
     * @param title  the frame title.
     */
    public Waterfall(final String title) {
 
        super(title);
       
        final CategoryDataset dataset = createDataset();
        final JFreeChart chart = createChart(dataset);
        final ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
        chartPanel.setEnforceFileExtensions(false);
        setContentPane(chartPanel);
    }
 
    /**
     * Creates a sample dataset for the demo.
     * data set of values
     * @return A sample dataset.
     */
    private CategoryDataset createDataset() {
         
        final DefaultCategoryDataset dataset = new DefaultCategoryDataset();
       
        dataset.addValue(4470, "S1", "1Odddddddddddddddd");// cumulative
        dataset.addValue(100, "S1", "ff3dddddddddddddddddd");
        dataset.addValue(200, "S1", "fff3dddddddddddddddddM");
        dataset.addValue(100, "S1", "f3ddddddddddddddddddddd");
        dataset.addValue(200, "S1", "f3Mddddddddddddddddddddddd");
       
        return dataset;
       
    }
   
       
   
        private JFreeChart createChart(final CategoryDataset dataset) {
       
        final JFreeChart chart = ChartFactory.createWaterfallChart( "",
                "",
                "",
                dataset,
                PlotOrientation.VERTICAL,
                false,
                true,
                false
            );
       
        CategoryPlot plot = chart.getCategoryPlot();
        plot.setBackgroundPaint(Color.white);
        plot.setDomainGridlinePaint(null);
        plot.setRangeGridlinePaint(null);
       
        NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
        rangeAxis.setVisible(false);
        WaterfallBarRenderer renderer = (WaterfallBarRenderer) plot.getRenderer();
        renderer.setItemLabelPaint(Color.red);
        renderer.setPaint(Color.blue);
       
        CategoryLabelGenerator generator2 = new StandardCategoryLabelGenerator(
              "{2}", new DecimalFormat("0.00")
              );
              
        renderer.setItemLabelsVisible(true);
        renderer.setLabelGenerator(new LabelGenerator(0,dataset));
        renderer.setPositiveItemLabelPosition(valPosPostion);
        renderer.setNegativeItemLabelPosition(valNegPostion);
        renderer.setFirstBarPaint(Color.white);
        renderer.setLastBarPaint(Color.white);
        ((org.jfree.chart.renderer.category.BarRenderer) renderer).setMaxBarWidth(.03);
        ((org.jfree.chart.renderer.category.BarRenderer) renderer).setDrawBarOutline(true);
        renderer.setBaseItemLabelFont(new java.awt.Font("Arial",Font.NORMAL,8));
       
        /**
         * customizing the category axis
         */
       
        CategoryAxis domainAxis = plot.getDomainAxis();
        domainAxis.setLowerMargin(0);
        domainAxis.setCategoryLabelPositionOffset(0);
        domainAxis.setMaxCategoryLabelWidthRatio(5.0f);
        domainAxis.setMaxCategoryLabelLines(3);
        domainAxis.setCategoryLabelPositions(
                CategoryLabelPositions.UP_90
            );
       
           
        return chart;
    }
 
       
       
       
static class LabelGenerator implements CategoryLabelGenerator {
   /** The threshold. */
   private double threshold;;
   private CategoryDataset dataset3;
 
   /**
   * Creates a new generator that only displays labels that are greater
   * than or equal to the threshold value.
   *
   * @param threshold the threshold value.
   */
   public LabelGenerator(double threshold ,CategoryDataset dataset ) {
   this.threshold = threshold;
   this.dataset3 = dataset;
   }
   
   /**
   * Generates a label for the specified item. The label is typically a
   * formatted version of the data value, but any text can be used.
   *
   * @param dataset the dataset (<code>null</code> not permitted).
   * @param series the series index (zero-based).
   * @param category the category index (zero-based).
   *
   * @return The label (possibly <code>null</code>  :wink:  .
   */
   public String generateLabel(CategoryDataset dataset, int series,int category) {
   String result = null;
   
//   this.dataset3 = dataset;
   Number value = dataset3.getValue(series, category);
   
   if (value != null) {
   double v = value.doubleValue();
   if (v > this.threshold) {
   result = value.toString(); // could apply formatting here
   }
   }
  [B] return result + "\n"+ "Diwakar";[/B]// it is neglecting the new line //character
   }
   }
 
 
    /**
     * Starting point for the demo.
     *
     * @param args  ignored.
     */
    public static void main(final String[] args) {
        final Waterfall demo = new Waterfall("Waterfall Chart Demo 2");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);
    }
   
}

the problem i am facing is it is neglecting the new line character . If any one knows how to display the text one below the other please help me out .

Thanks in advance .

Regards,
Diw
[ September 30, 2008: Message edited by: Rob Prime ]

[Rob Spoor]

Please Use Code Tags. That will preserve your formatting.

[Diwakar Chittora]

Friends,
Please help its urgent , please reply if anyone knows how to do it

Thanks in advance ,
Regards,
Diw

[Jaikiran Pai]

Diwakar,

Please BePatient.

In your example, i don't see your LabelGenerator being used anywhere. You seem to be using the org.jfree.chart.labels.StandardCategoryLabelGenerator:

CategoryLabelGenerator generator2 = new StandardCategoryLabelGenerator(              "{2}", new DecimalFormat("0.00"));