CODEWITHSUNDEEP
javajasper-reportsjfreechartdynamic-jasper
Raysen Jia
Raysen Jia

Reputation: 389

How can I add horizontal line to bar chart in Jasper Report?

I'm trying to designing a report with bar chart, in which I need to add a threshold. I have tried with multi-axis chart, in which the scale in different axis is always different.

Is there any other solution to add line to bar chart?

My expect output is a chart as below: enter image description here

Upvotes: 2

Views: 3925

Answers (2)

Paco Abato
Paco Abato

Reputation: 4065

For one single horizontal line you can use provided chart customizer:

Go to Chart -> Properties -> Chart (tab) -> Chart customizers

Chart properties

There you can add a Range Interval Marker and configure it with start and end values with the desired value (13000 in your example).

This way an horizontal line will be drawn in the 13000 vertical value as you wanted.

Upvotes: 0

Petter Friberg
Petter Friberg

Reputation: 21710

To draw a line on the bar chart you add a ValueMarker to the CategoryPlot.

In jasper report this is done my adding a JRChartCustomizer

public class MyChartCustomizer implements JRChartCustomizer {

    @Override
    public void customize(JFreeChart jfchart, JRChart jrchart) {
        CategoryPlot plot = (CategoryPlot) jfchart.getPlot();
        //Set at what value you like the line, its color and size of stroke
        ValueMarker vm = new ValueMarker(13000,Color.BLUE, new BasicStroke(2.0F));
        //add marker to plot
        plot.addRangeMarker(vm);
    }
}

In jrxml make sure your class is in classpath and set the customizerClass attribute on the chart tag

<barChart>
    <chart customizerClass="MyChartCustomizer">
   ....
    </chart>
   ...
</barChart>

If you are using you can add it directly in code

chart.addCustomizer(new DRIChartCustomizer() {      
    private static final long serialVersionUID = 1L;
    @Override
    public void customize(JFreeChart chart, ReportParameters arg1) {
        CategoryPlot plot = (CategoryPlot) jfchart.getPlot();
        ValueMarker vm = new ValueMarker(13000,Color.BLUE, new BasicStroke(2.0F));
        plot.addRangeMarker(vm);
    }
});

If you are using setCustomizerClass (as in jrxml)

DJBarChartBuilder().setCustomizerClass("MyChartCustomizer");

Example of result

Chart

Note: in example no package name is used, if MyChartCustomizer is in a package full package name needs to be indicated in setCustomizerClass example "my.package.MyChartCustomizer"

Upvotes: 6

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