Nuclos Jasper pie chart: value label key, label format, pie3DPlot, piePlot, customizer, PiePlot, setLabelFont.

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Pie chart

Pie charts in JasperReports – data binding (value/label/key) and three ways of formatting including a customizer class.

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Create a pie chart

Drag the chart element from the palette onto the canvas – the selection dialog opens.
Choose Pie Chart or Pie3D Chart and configure via Next or create immediately with Finish.

Low-Code und Werkzeuge > Pie Chart > Jaspersoft_Studio_Create_Pie_Chart_Dialog_Details.png

Pie chart selection in the wizard.

Data binding

Field	Meaning
Value	numeric value of the segment (e.g. order total).
Label	label of the shares (value or key).
Key	key/grouping (equals `GROUP BY`) – shown in the legend.
Reset on	usually Report.

Formatting

1. Label format (property Label Format)

{0}  text only
{1}  with number
{2}  percentage

2. Font & size in the XML

Applies to pie3DPlot and piePlot:

<pie3DPlot depthFactor="0.1" isCircular="true" labelFormat="{0} {2}" legendLabelFormat="">
  <plot/>
  <itemLabel>
    <font fontName="Calibri" size="8"/>
  </itemLabel>
</pie3DPlot>

3. Custom customizer class

package org.axismanipulation;
import java.awt.Color;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PiePlot;
import net.sf.jasperreports.engine.JRAbstractChartCustomizer;
import net.sf.jasperreports.engine.JRChart;
import java.awt.Font;

 public class PieManipulation extends JRAbstractChartCustomizer{
    @Override
    public void customize(JFreeChart chart, JRChart jasperChart) {
        PiePlot plot = (PiePlot)chart.getPlot();
        plot.setInteriorGap(0.02);
        plot.setMaximumLabelWidth(0.20);
        plot.setBackgroundPaint(Color.white);
		Font font = new Font("Calibri", Font.PLAIN, 7);
        plot.setLabelFont(font);
		plot.setCircular(true);
                 
    }
}

Related pages

Charts in the designer

Charts.

Öffnen →

Multi axis

Multi axis.

Öffnen →