Programmatically select DataPoint in AreaSeries

[Vikram]

How do i programmatically select a DataPoint in an AreaSeries? 

[Victor]

Hi Vikram,

Thank you for writing.
Each data point has an IsSelected property that you can set.

Regards,
Victor
Telerik

[Vikram]

How do I retrieve a specific DataPoint for a series? Let's say the last one.

[Victor]

Hi Vikram,

You can get the last point like this:

DataPointCollection points = series.model().dataPoints();
DataPoint lastPoint = (DataPoint)points.get(points.size() - 1);

Let us know if you need further assistance.

Regards,
Victor
Telerik

[Vikram]

Thank you. One more question. If I select a DataPoint programmatically, I notice that the ChartSelectionChangeListener is not notified. What API do I call to make sure the chart selection is updated? Thanks, Vikram

[Victor]

Hi Vikram,

Thanks for writing.
This appears to be a bug. The data point selection change is not propagated to the selection behavior. Currently the only way to detect the selection is to inherit from your series and override this method:

protected void onDataPointSelectionChanged(DataPoint point);

For example:

public class CustomBarSeries extends BarSeries {
    @Override
    public void onDataPointIsSelectedChanged(DataPoint point) {
        super.onDataPointIsSelectedChanged(point);
        // Do something with selected data point.
    }
}

Please write again if you need further assistance.

Regards,
Victor
Telerik

[Manikandan]

Hi,

I am trying to programatically select the pie chart on click of a button. And I expect the pie chart selection behavior (The selected slice to be shown detached from the pie). I tried pieSeries.model().dataPoints().get(0).setIsSelected(true);, but I dont see the selected behavior. Can you help?

 

Regards,

Manikandan

[Victor]

Hello Manikandan,

Thank you for writing.
Can you please post a support ticket and attach your app so that I can debug it. I tested a pie chart and called pieSeries.dataPoints().get(0).setIsSelected(true) and the points gets selected normally.

Regards,
Victor
Telerik by Progress