Bar Chart: how to display labels of the bars

Issue Description:

On the bars of the bar chart, sometimes not all values ​​of the bar labels are displayed. This will depend on the displayed data (size of the particular bars)

Resolution:

This is a known limitation. When bars on charts reach the outer edges of the chart, some of labels get cut off. 

A possible workaround to avoid labels truncation is to write a chart customizer implementing the JRChartCustomizer interface, similar to the following:

import net.sf.jasperreports.engine.JRChart;
import net.sf.jasperreports.engine.JRChartCustomizer;
import org.jfree.chart.plot.*;
import org.jfree.ui.*;
public class PlotInsetCustomizer implements JRChartCustomizer{
    public PlotInsetCustomizer() {}
    public void customize(JFreeChart jfc, JRChart chart){
        double top = 15.0;    // this is the inset you need to adjust to make sure
                              // that there is enough space to display the truncated label
        double bottom = 5.0;
        double left = 5.0;
        double right = 5.0;
        XYPlot plot = (XYPlot)jfc.getPlot();
        plot.setInsets(new RectangleInsets(top, bottom, left, right));
        //adjust the "top" value to make sure it is big enough to accommodate the missing label
    }
}

There is some information about implementing chart customizers in section 12.4 Properties of Charts if the iReport Ultimate Guide, and also in JasperReports Ultimate guide.

References:

• net.sf.jasperreports.engine.JRChart
• net.sf.jasperreports.engine.JRChartCustomizer
• org.jfree.chart.plot
• org.jfree.ui

Ref. Case #00028310