CODEWITHSUNDEEP
primefaceschartsjqplot
Noman Khurram
Noman Khurram

Reputation: 25

how to get bar data when clicked on any bar in primefaces barchart

I am using Primefaces Barchart and i want to show the data in the ChartSeries when link to any bar in barchart. My code is as below:

<p:chart type="bar" model="#{dailyreport.horizontalBarChart}"  rendered="#{dailyreport.chartDate != null}"  style="height:900px;width:900px;" widgetVar="bchart">
</p:chart>

and the horizontalBarChart i'm setting Map for Series and the values in the map is like ("00:14",10).

I know about primefaces interactive charts But how to get that particular item data which is clicked in the chart.I managed to do the below:

public void itemSelect(ItemSelectEvent event){
    Integer seriesIndex = event.getSeriesIndex();
    Integer itemIndex = event.getItemIndex();

HorizontalBarChartModel cModel = (HorizontalBarChartModel) ((org.primefaces.component.chart.Chart) event.getSource()).getModel();
List<ChartSeries> cData= cModel.getSeries();

Map<Object, Number> ct =  cData.get(seriesIndex).getData();

}

How to get that particular item from map using itemIndex?

Upvotes: 0

Views: 2501

Answers (2)

Noman Khurram
Noman Khurram

Reputation: 25

i have done is like this:

HorizontalBarChartModel cModel = (HorizontalBarChartModel) ((org.primefaces.component.chart.Chart) event.getSource()).getModel();

 ChartSeries mySeries = cModel.getSeries().get(event.getSeriesIndex());

 Set<Entry<Object, Number>> mapValues = mySeries.getData().entrySet();

 Entry<Object,Number>[] test = new Entry[mapValues.size()];

 mapValues.toArray(test);
System.out.prinlnt("Key"+test[event.getItemIndex].getKey());
System.out.prinlnt("Value"+test[event.getItemIndex].getValue());

Upvotes: 2

Kukeltje
Kukeltje

Reputation: 12337

The problem (which is now basically a plain java one ;-)) is that the getData() on the ChartSeries is backed by a LinkedHashMap, which does not have the option to get a value based on an index (even though the LinkedHashMap is maintains the insertion order. So you have to maintain a mapping between the key and index yourself while populating the model and keep that e.g. in a bean as well. Another option to not have to do this each time is to extend the ChartSeries like this:

package some.package;

import java.util.ArrayList;
import java.util.Map;

import org.primefaces.model.chart.ChartSeries;

public class MyChartSeries extends ChartSeries {

    private ArrayList<Object> indexKeyMapper = new ArrayList<>();

    public void setData(Map<Object, Number> data) {
        throw new RuntimeException("No, sorry");
    }

    public void set(Object x, Number y) {
        getData().put(x, y);
        indexKeyMapper.add(x);
    }

    public Object getKey(int index) {
        return indexKeyMapper.get(index);
    }

    public Number getData(int index) {
        return getData().get(indexKeyMapper.get(index));
    }

}

And then you can use a getData(event.getItemIndex()) on the retrieved series (do not forget to cast to MyChartSeries).

(this works, I just tested)

Upvotes: 1

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