How to Create Interactive DataGrid for Trading Apps in Flutter?

In this article, we will show you how to create interactive Data Grids for trading apps in Flutter DataGrid.

Steps to update the SfDataGrid efficiently with real-time data:

Step 1: Initialize the SfDataGrid

Initialize the SfDataGrid widget with all the necessary properties, such as columns and data source. Then, define a model class with the required properties to represent the data structure that needs to be displayed in the grid.

Step 2: Update Stock Data Periodically

Update stock data periodically based on the required time interval. Use a periodic mechanism, such as timers, to fetch updated stock data at the specified intervals. When any value changes, call the notifyDataSourceListeners method with the RowColumnIndex argument, which should point to the specific row and column index of the updated cell. This approach ensures that only the relevant cell is refreshed in the DataGrid, improving performance and minimizing unnecessary re-renders.

@override
  void initState() {
    super.initState();
    columns = getColumns();
    _realTimeUpdateDataGridSource =
        RealTimeUpdateDataGridSource(columns: columns);
    _timer = Timer.periodic(const Duration(milliseconds: 800), (Timer args) {
      _realTimeUpdateDataGridSource.timerTick(args);
    });
  }

class RealTimeUpdateDataGridSource extends DataGridSource {
  RealTimeUpdateDataGridSource({required this.columns}) {
    _stocks = _fetchStocks();
    _buildDataGridRows();
  }

  List<GridColumn> columns;
  final Random _random = Random();
  List<Stock> _stocks = <Stock>[];
  List<DataGridRow> _dataGridRows = <DataGridRow>[];

  void timerTick(Timer args) {
    _updateStockData();
  }
}

View the GitHub sample here.

Conclusion
I hope you enjoyed learning how to create interactive DataGrid for trading apps in Flutter.
You can refer to our Flutter DataGrid feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our Flutter DataGrid example to understand how to create and manipulate data.
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