你可以在你的小工具中使用一个全局键，它会告诉你当前小工具的大小。

GlobalKey stickyKey = GlobalKey();
Container(
  key: _widgetKey,
),

您可以随时随地使用它：

void _getWidgetInfo(_) {
    final RenderBox renderBox = _widgetKey.currentContext?.findRenderObject() as RenderBox;
 
    final Size size = renderBox.size; // or _widgetKey.currentContext?.size
    print('Size: ${size.width}, ${size.height}');
 
    final Offset offset = renderBox.localToGlobal(Offset.zero);
    print('Offset: ${offset.dx}, ${offset.dy}');
    print('Position: ${(offset.dx + size.width) / 2}, ${(offset.dy + size.height) / 2}');
  }

我猜你有一个方法，当你移动到新的文件夹时，你会调用这个方法，然后当你移动到新的文件夹时，你会调用_getWidgetInfo方法来计算新的长度。

这对你有用吗？它会修剪/裁剪左边的内容/开始填充所有可用的右边/结尾内容。

输出：

完整代码：

import 'package:flutter/material.dart';

void main() => runApp(const CodeCyanApp());

class CodeCyanApp extends StatelessWidget {
  const CodeCyanApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(),
        body: Row(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            const Icon(Icons.folder),
            const SizedBox(width: 5),
            Expanded(
              child: Stack(
                alignment: AlignmentDirectional.centerEnd,
                children: [
                  Positioned(
                    top: 0,
                    child: Wrap(
                      spacing: 5,
                      children: const [
                        Text('>'),
                        Text('Windows'),
                        Text('>'),
                        Text('Programs'),
                        Text('>'),
                        Text('CodeCyan'),
                        Text('>'),
                        Text('Utilities'),
                        Text('>'),
                        Text('Flutter'),
                        Text('>'),
                        Text('Wrap'),
                        Text('>'),
                        Text('Neted'),
                      ],
                    ),
                  ),
                ],
              ),
            ),
            const SizedBox(width: 5),
            const Icon(Icons.arrow_downward),
            const SizedBox(width: 5),
            const Icon(Icons.refresh),
          ],
        ),
      ),
    );
  }
}