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Doughnut Chart - Recalculating visible series percetanges

I am using the ToggleSeriesVisibility option for a Doughnut chart.  I want to recalculate the percentage labels for each remaining visible series point.  

However when i loop each series points its always returning true for its visible state (see yellow highlighted code).  Am I using the wrong property?

function pieChartSeriesChange(args) {
  
    var series = args.model.series;
  
    for (var i = 0; i < series.length; i++) {
        var total = 0;

        //Calculate total value 
        for (var j = 0; j < series[i].points.length; j++) 
       {
             if (series[i].points[j].visible ) { total += series[i].points[j].y; }
       }
 
 
        for (j = 0; j < series[i].points.length; j++)
            series[i].points[j].text = series[i].points[j].x + ':- ' + (series[i].points[j].y / total * 100).toFixed(2) + '%';
    }
}

3 Replies

DD Dharanidharan Dharmasivam Syncfusion Team November 25, 2016 01:36 PM UTC

Hi Matthew, 

Thanks for using Syncfusion product. 

We have analyzed your query. Since the visible property in points is a public API, we can’t override its value in source while toggle the visibility by clicking legend. But you can get this in _visibility in the point as an work around. And also you can reject the hidden point of a series to find the total using the below code snippet, since the hidden point will not be taken in account for finding overall percentage. 

ASP.NET MVC: 
@(Html.EJ().Chart("container") 
    //... 
    .LegendItemClick("pieChartSeriesChange") 
) 

function pieChartSeriesChange(args) { 
        var series = args.model.series; 
        for (var i = 0; i < series.length; i++) { 
            var total = 0; 
            //Calculate total value 
            for (var j = 0; j < series[i].points.length; j++) { 
                if (series[i].points[j]._visibility == "visible" && args.data.legendItem.LegendItem.PointIndex != j)  
                    total += series[i].points[j].y; 
            } 
            for (j = 0; j < series[i].points.length; j++) 
                series[i].points[j].text = series[i].points[j].x + ':- ' + (series[i].points[j].y / total * 100).toFixed(2) + '%'; 
        } 
    } 

Screenshot: 
 
For your reference, we have attached the sample. Kindly find the sample from below location, 
  
Thanks, 
Dharani. 



MH Matthew Holdsworth November 25, 2016 02:14 PM UTC

Thanks for the info,

I changed the process I changed the process slightly by using the event Series Rendering and removing the additional check you add rgs.data.legendItem.LegendItem.PointIndex != j




DD Dharanidharan Dharmasivam Syncfusion Team November 28, 2016 10:10 AM UTC

Hi Matthew, 
 
Thanks for your update.  
 
Kindly revert us, if you need further assistance on this.  

Thanks, 
Dharani. 


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