LoadMoreIndicatorBuilder with seri type SplineSeries

Question

I have tried this example : https://www.syncfusion.com/kb/12535/how-to-lazily-load-more-data-to-the-chart-sfcartesianchart?_gl=1*15b3qv2*_ga*MjA1MzA5OTkyMS4xNjQ4Nzk3OTA2*_ga_WC4JKKPHH0*MTY1MDQyMzEyNi40OC4xLjE2NTA0MjU3MzcuMA..&_ga=2.149062134.1741546187.1650244861-2053099921.1648797906

but when i use function loadMoreIndicatorBuilder with seri type SplineSeries and I got the error like picture below. Does the function seriesController.updateDataSource NOT support Datetime type? Could the Flutter team help me how to solve this problem ?

Yuvaraj Gajaraj · Answer

Hi Tuyen,Greetings from Syncfusion. We suspect that you don’t change the
type and casting to double the axis visible minimum and maximum value in
the onActualRangeChanged callback.
Because for the DateTimeAxis the
visible minimum and maximum value are timestamps it didn’t support double so
please change the oldAxisVisibleMin and oldAxisVisibleMax variable type to int
and remove the typecasting like in the below code snippet. Otherwise, the
sample is working fine.Code snippet:

int? oldAxisVisibleMin, oldAxisVisibleMax;
   
  onActualRangeChanged: (ActualRangeChangedArgs args) {
    if (args.orientation == AxisOrientation.horizontal) {
      if (isLoadMoreView) {
        args.visibleMin = oldAxisVisibleMin;
        args.visibleMax = oldAxisVisibleMax;
      }
      oldAxisVisibleMin = args.visibleMin;
      oldAxisVisibleMax = args.visibleMax;
    }
  },

Regards,Yuvaraj.

Tuyen Vokhac · Answer

Hi Yuvaraj,I checked and it works well.Man

Yuvaraj Gajaraj · Answer

Hi Tuyen,Most welcome. We are always happy to assist you, if you have
any further queries, please get back to us.Regards,Yuvaraj.

LoadMoreIndicatorBuilder with seri type SplineSeries<ChartData, DateTime>