Label in each point of a Line Chart

[stopbugginme]

 Hi all, 

 

Is it possible to add a label in each point in a Line Chart? In case i have to customize the chart...is there any example on how to do it?

I guess this is a common issue, how did tyou solve this?

[stopbugginme]

Code:

import java.text.NumberFormat;



import org.jfree.chart.JFreeChart;

import org.jfree.chart.labels.AbstractCategoryItemLabelGenerator;

import org.jfree.chart.labels.CategoryItemLabelGenerator;

import org.jfree.chart.plot.CategoryPlot;

import org.jfree.chart.renderer.category.LineAndShapeRenderer;

import org.jfree.data.category.CategoryDataset;



import net.sf.jasperreports.engine.JRAbstractChartCustomizer;

import net.sf.jasperreports.engine.JRChart;



/**

 * @author mdahlman This chart customizer allows the report developer to set the

 *         following JFreeChart property which is not otherwise set-able in

 *         iReport:

 * 

 *         Tick Label Font

 * 

 *         This property applies only to Pie plots. Charts that do not use pie

 *         plots will ignore these properties. The properties should be set

 *         using the "Properties expressions" field in iReport. This results in

 *         .jrxml like the following:

 * 

 *         <property name="TickLabelFontName" value="Verdana"/> <property

 *         name="TickLabelFontStyle" value="Font.PLAIN"/> <property

 *         name="TickLabelFontSize" value="8"/>

 * 

 */



public class CustomizedLineChart extends JRAbstractChartCustomizer {



	@Override

	public void customize(JFreeChart chart, JRChart jasperChart) {

		// TODO Auto-generated method stub

		CategoryPlot categoryPlot = (CategoryPlot) chart.getPlot();



		LineAndShapeRenderer lineAndShapeRenderer = (LineAndShapeRenderer) categoryPlot.getRenderer();



		lineAndShapeRenderer.setBaseItemLabelGenerator(new CustomLabelGenerator());



		lineAndShapeRenderer.setBaseItemLabelsVisible(true);

	}



	// Clase customizada, para implementar la visibilidad de los valores del grafico

	static class CustomLabelGenerator extends AbstractCategoryItemLabelGenerator implements CategoryItemLabelGenerator {

		   

		   

		   /**

		   * Creates a new generator that only displays labels that are greater

		   * than or equal to the threshold value.

		   *

		   * @param threshold the threshold value.

		   */

		   public CustomLabelGenerator() {

		      super("", NumberFormat.getInstance());

		      

		   }

		   /**

		   * 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>).

		   */

		   public String generateLabel(CategoryDataset dataset, int series,int category) {

		      

		      String result = null;

		      

		      Number value = dataset.getValue(series, category);

		      

		      result = value.toString(); // could apply formatting here

		      

		      return result;   

		   }

		   /* (non Javadoc)

		    * @see org.jfree.chart.labels.CategoryItemLabelGenerator#generateRowLabel(org.jfree.data.category.CategoryDataset, int)

		    */

		   public String generateRowLabel(CategoryDataset arg0, int arg1) {

			 // TODO Stub del metodo generado automaticamente

		      return null;

		   }

		   /* (non Javadoc)

		    * @see org.jfree.chart.labels.CategoryItemLabelGenerator#generateColumnLabel(org.jfree.data.category.CategoryDataset, int)

		    */

		   public String generateColumnLabel(CategoryDataset arg0, int arg1) {

		      // TODO Stub del metodo generado automaticamente

		      return null;

		   }

	}

}

[colddata]

stopbugginme, you are awesome!!! Thank you so much for sharing this. Spent hours googling for something that would point me in the right direction.

[DECISIT]

Or much simpler:

package com.ireport.cust;import net.sf.jasperreports.engine.JRChart;import net.sf.jasperreports.engine.JRChartCustomizer;import org.jfree.chart.JFreeChart;import org.jfree.chart.labels.CategoryItemLabelGenerator;import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;import org.jfree.chart.plot.CategoryPlot;import org.jfree.chart.renderer.category.LineAndShapeRenderer;/** * * @author DECISIT */public class LineChartItemLabelCustomizer implements JRChartCustomizer {        @Override    public void customize(JFreeChart chart, JRChart jasperChart)    {        CategoryPlot categoryPlot;         LineAndShapeRenderer lineAndShapeRenderer;                categoryPlot = (CategoryPlot) chart.getPlot();        lineAndShapeRenderer= (LineAndShapeRenderer) categoryPlot.getRenderer();        lineAndShapeRenderer.setBaseItemLabelsVisible(Boolean.TRUE);        lineAndShapeRenderer.setBaseItemLabelGenerator((CategoryItemLabelGenerator) new StandardCategoryItemLabelGenerator());    }    }

Don't forget to add the created jar to iReport classpath :)

[lfernandortiz]

Muchas gracias Decisit, me fue muy útil la clase que proporcionaron. A thousand Thanks!.

[ayazkhan.mca]

is it possible to give label name in bubble chart without coding or without scripting?

[ayazkhan.mca]

is it possible to give label name in bubble chart without coding or without scripting?