import 'dart:io'; import 'package:flutter/material.dart'; import 'data_provider/data_provider.dart'; import 'full_screen_image_view.dart'; import 'image_tile.dart'; class ImageGrid extends StatefulWidget { const ImageGrid({Key? key, required this.dProvider}) : super(key: key); final DataProvider dProvider; @override State createState() => _ImageGridState(); } class _ImageGridState extends State { final ScrollController _controller = ScrollController(); late Future folder = widget.dProvider.listOfFiles(); @override void didUpdateWidget(ImageGrid oldWidget) { super.didUpdateWidget(oldWidget); if (oldWidget.dProvider != widget.dProvider) { folder = widget.dProvider.listOfFiles(); } } @override Widget build(BuildContext context) { final width = MediaQuery.of(context).size.width; return FutureBuilder( future: folder, builder: (context, AsyncSnapshot snapshot) { if (snapshot.connectionState == ConnectionState.done) { if (snapshot.hasData && snapshot.data != null) { final Folder data = snapshot.data!; return GridView.builder( controller: _controller, gridDelegate: SliverGridDelegateWithFixedCrossAxisCount( crossAxisSpacing: 0, mainAxisSpacing: 0, crossAxisCount: Platform.isAndroid ? width ~/ 100 : width ~/ 300, ), itemCount: data.items.length + 1, itemBuilder: (context, index) { if (index == 0) { return ImageTile( child: Icon(Icons.arrow_back, size: Platform.isAndroid ? 64 : 142), onClick: () { setState(() { folder = widget.dProvider.listOfFiles(uri: data.parent); }); }, ); } final elem = data.items[index - 1]; return ImageTile( dtaProvider: widget.dProvider, imageUri: elem.isFolder ? null : elem.uri, onClick: () { if (elem.isFolder) { setState(() { folder = widget.dProvider.listOfFiles(uri: elem.uri); }); _controller.jumpTo(.0); } else { Navigator.push( context, MaterialPageRoute(builder: (context) { final d = data.items .where((element) => !element.isFolder) .toList(growable: false); // check how many folders are before index and subtract it final newidx = index - data.items .getRange(0, index) .where((element) => element.isFolder) .length; return FullScreenImageView( provider: widget.dProvider, items: d, idx: newidx, ); }), ); } }, child: elem.isFolder ? Column( mainAxisAlignment: MainAxisAlignment.center, children: [ Icon(Icons.folder_open, size: Platform.isAndroid ? 64 : 142), Text(elem.name) ], ) : null); }, ); } else if (snapshot.hasError) { return const Text("Error loading files"); } } return const CircularProgressIndicator( strokeWidth: 3, ); }, ); } }