我有一个图像从文件作为一个InteractiveView的子。交互式视图本身是PageView的子视图。由于页面控制器，我不得不在图像放大时禁用分页，以便用户可以平移图像而不会转到下一页。
但是，当图像被放大并一直平移到左侧或右侧时，我希望再次启用分页。我该怎么做？

import 'dart:io';

import 'package:flutter/material.dart';

class PhotoViewer extends StatefulWidget {
  final List<String> photoPaths;
  final int startIndex;

  const PhotoViewer({
    super.key,
    required this.photoPaths,
    this.startIndex = 0
  });

  @override
  State<StatefulWidget> createState() => _PhotoViewerState();
}

class _PhotoViewerState extends State<PhotoViewer> {
  late PageController _pageController;
  int _selectedPageIndex = 0;
  bool _pagingEnabled = true;

  @override
  void initState() {
    super.initState();
    _selectedPageIndex = widget.startIndex;
    _pageController = PageController(initialPage: _selectedPageIndex);
  }

  @override
  void dispose() {
    super.dispose();
    _pageController.dispose();
  }

  void _pageChanged(int index) {
    if (_selectedPageIndex != index) {
      _pageController.jumpToPage(index);
      setState(() {
        _selectedPageIndex = index;
      });
    }
    FocusScope.of(context).unfocus();
  }

  void _onScaleChanged(double scale) {
    setState(() {
      _pagingEnabled = scale <= 1.0;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text("Trip Photos"), backgroundColor: Colors.black, foregroundColor: Colors.white,),
      body: Container(
        color: Colors.black,
        child: PageView(
          physics: _pagingEnabled ? const PageScrollPhysics() : const NeverScrollableScrollPhysics(),
          controller: _pageController,
          onPageChanged: _pageChanged,
          children: widget.photoPaths.map((path) => _InteractiveImage(path, _onScaleChanged)).toList(),
        ),
      ),
    );
  }
}

class _InteractiveImage extends StatefulWidget {
  String imgPath;
  Function(double) onScaleChanged;

  _InteractiveImage(this.imgPath, this.onScaleChanged);

  @override
  State<StatefulWidget> createState() => _InteractiveImageState();
}

class _InteractiveImageState extends State<_InteractiveImage> {
  late TransformationController _transformationController;

  @override
  void initState() {
    super.initState();
    _transformationController = TransformationController();
  }

  @override
  void dispose() {
    super.dispose();
    _transformationController.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return InteractiveViewer(
      onInteractionEnd: (ScaleEndDetails? details) {
        double scale = _transformationController.value.getMaxScaleOnAxis();
        widget.onScaleChanged(scale);
      },
      transformationController: _transformationController,
      child: Image.file(
          File(widget.imgPath
          )
      ),
    );
  }
}