how to change text in bar chart

 List<_SalesData> data = [
    _SalesData(' 1', 3.1),
    _SalesData(' 2', 3.23),
    _SalesData(' 3', 3.39),
    _SalesData(' 4', 2.90),
    _SalesData(' 5', 3.80),
    _SalesData(' 6', 3.11),
    _SalesData(' 7', 3.81),
    _SalesData(' 8', 0)
  ];

how do I change the text in the barchart because the widget doesn't have text to change. I don't know where to change this because I'm new to using charts, maybe someone here knows how to change it. Thank you.

Center(
            child: SfCartesianChart(
              primaryXAxis: CategoryAxis(),
              // Chart title
              title: ChartTitle(
                text: 'IPK Mahasiswa',
                textStyle: bold6,
              ),
              tooltipBehavior: TooltipBehavior(enable: true),
              series: <ChartSeries<_SalesData, String>>[
                ColumnSeries(
                  color: primaryColor,
                  dataSource: data,
                  xValueMapper: (_SalesData sales, _) => sales.year,
                  yValueMapper: (_SalesData sales, _) => sales.sales,
                  dataLabelSettings: const DataLabelSettings(isVisible: true),
                ),
              ],
            ),
          ),

CodePudding user response：

based on documentation: