Flutter setState on sibling widgets

In the following, my Sort mixin class created a list of ItemStatefulWidget widgets,

When a user clicks on a ItemStatefulWidget widget, it calls setState() to update the values stored in globalSortConfig, which is used by other sibling widgets.

However, setState didn't trigger rebuild in other sibling widgets.

Sort Mixin Source Code:

import 'package:flutter/material.dart';

dynamic globalSortConfig = null;

//
// Sort Mixin
//
mixin Sort<T extends StatefulWidget> on State<T> {
  List<Widget> sortWidgets;
  dynamic mixinSorts;

  @override
  void initState() {
    super.initState();
  }

  void showSortModal(context, Function callback) {
    // set global sort config
    if(globalSortConfig == null) {
      globalSortConfig = mixinSorts;
    }

    // show modal
    showModalBottomSheet<void>(
      context: context,
      builder: (BuildContext context) {
        // build sort widgets 
        if (sortWidgets == null) {
          sortWidgets = [];
          for (var i = 0; i < mixinSorts.length; i++) {
            sortWidgets.add(ItemStatefulWidget(i: i, callback: callback));
          }
        }
        
        // return 
        return Container(
          child: Center(
            child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: sortWidgets),
          ),
        );
      },
    );
  }
  
  dynamic getSortCriteria() {
    dynamic criteria = {};
    if (globalSortConfig != null) {
      for (var i = 0; i < globalSortConfig.length; i++) {
        if (globalSortConfig[i]['select'] == true) {
          criteria['sort'] = globalSortConfig[i]['sort'];
          criteria['order'] = globalSortConfig[i]['order'];
        }
      }
    }
    return criteria;
  }
}

ItemStatefulWidget Source code

class ItemStatefulWidget extends StatefulWidget {
  final int i;
  final Function callback;

  ItemStatefulWidget({Key key, this.i, this.callback}) : super(key: key);

  @override
  _ItemStatefulWidgetState createState() => _ItemStatefulWidgetState();
}

class _ItemStatefulWidgetState extends State<ItemStatefulWidget> {

  @override
  Widget build(BuildContext context) {
    // var
    int i = this.widget.i;
    List<Widget> lineWidgets = [];

    // checked icon
    if (globalSortConfig[i]['select'] == true) {
      Widget iconWidget = Icon(Icons.check);
      lineWidgets.add(iconWidget);
    }

    // label
    String label =  globalSortConfig[i]['label'];

    lineWidgets.add(GestureDetector(
      child: Text(label,
        style: TextStyle(fontSize: 20),
      ),
      onTap: () {
        setState(() {

          // update value
          globalSortConfig[i]['select'] = !globalSortConfig[i]['select'];
          for (var w = 0; w < globalSortConfig.length; w++) {
            if (w != i) {
              globalSortConfig[w]['select'] = false;
            }
          }

          // pop and callback
          Future.delayed(const Duration(microseconds: 900), () {
            Navigator.pop(context);
            this.widget.callback();
          });
        });
      },
    ));

    // alignment
    Widget row = Row(
      mainAxisAlignment: MainAxisAlignment.center,
      children: lineWidgets,
    );
    return row;
  }
}