test

import 'package:flutter/material.dart';

void main() {
  runApp(const MaterialApp(
    home: Scaffold(
      body: Center(
        child: Padding(
          padding: EdgeInsets.all(20),
          child: DottedLineWidget(),
        ),
      ),
    ),
  ));
}

class DottedLineWidget extends StatefulWidget {
  const DottedLineWidget({Key? key}) : super(key: key);

  @override
  State<DottedLineWidget> createState() => _DottedLineWidgetState();
}

class _DottedLineWidgetState extends State<DottedLineWidget> {
  late bool _ellipsisMode = false;
  bool _isSelected = false;

  double _widthOfRowWidget = 0;
  double _widthOfTextContainerWidget = 0;

  final GlobalKey _rowKey = GlobalKey();
  final GlobalKey _textContainerKey = GlobalKey();

  Widget _buildSecondContainer() {
    if (_ellipsisMode) {
      return const SizedBox.shrink();
    } else {
      return const FittedBox(
        child: Text(
          '- - - - - - - - - - - - - - -',
          maxLines: 1,
        ),
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    WidgetsBinding.instance.addPostFrameCallback((_) {
      _widthOfRowWidget = _rowKey.currentContext?.size?.width ?? 0;
      _widthOfTextContainerWidget = _textContainerKey.currentContext?.size?.width ?? 0;

      /// 50 pixel limit
      _ellipsisMode = _widthOfRowWidget - _widthOfTextContainerWidget <= 50;

      setState(() {});
    });
    return Row(
      key: _rowKey,
      children: [
        Flexible(
          child: Card(
            child: FittedBox(
              child: Text(
                _isSelected ? _ConstantText.longText : _ConstantText.shortText,
                maxLines: 1,
                key: _textContainerKey,
                overflow: _ellipsisMode ? TextOverflow.ellipsis : null,
              ),
            ),
          ),
        ),
        Container(
          color: Colors.red,
          margin: EdgeInsets.zero,
          child: _buildSecondContainer(),
        ),
        Expanded(
          child: Checkbox(
            value: _isSelected,
            onChanged: (isSelected) {
              setState(() => _isSelected = isSelected ?? false);
            },
          ),
        ),
      ],
    );
  }
}

class _ConstantText {
  static const String shortText = 'Lorem ipsum kk adjc diri';
  static const String longText = 'Lorem ipsum kk adjc jjj cd kcsc jnkjnk ksncs cibv diri';
}