[syncfusion_flutter_charts] How to trigger onSelectionChanged event with tap the whole column in ColumnSeries?

[AlexTeamX]

I tried onPointTap, onAxisLabelTapped, onDataLabelTapped, onSelectionChanged, but they wouldn't triggered on the whole column.
For example: This is a columnSeries, there are some zero value column, I can just tap on blue area to change selection area, how can I trigger onSelectionChanged event?

[Yuvaraj-Gajaraj]

The onSelectionChanged callback only triggers when the tapped position is inside the column region, in your sample you have tried to tap on the zero value column that didn't have a region. This is the reason the onSelectionChanged callback is not triggered. Hence you can achieve this with the help of onDataLabelTapped and selectDataPoints public method of selection behavior. When tapping on the data label you can get the respective pointIndex value of that column segment and pass the index value in selectDataPoints public method. We have shared the sample below for your reference.

Screenshot:

Sample:
i425249.zip

[AlexTeamX]

The onSelectionChanged callback only triggers when the tapped position is inside the column region, in your sample you have tried to tap on the zero value column that didn't have a region. This is the reason the onSelectionChanged callback is not triggered. Hence you can achieve this with the help of onDataLabelTapped and selectDataPoints public method of selection behavior. When tapping on the data label you can get the respective pointIndex value of that column segment and pass the index value in selectDataPoints public method. We have shared the sample below for your reference.

Screenshot:

Sample: i425249.zip

Thank you very much. I'm already forked and edit the source code to fix it.