Gallery/lib/home_page.dart

import 'package:flutter/material.dart';
import 'package:gallery/data_provider/data_provider.dart';
import 'package:gallery/data_provider/local_data_provider.dart';
import 'package:gallery/data_provider/ssh_data_provider.dart';
import 'package:gallery/image_tile.dart';

import 'full_screen_image_view.dart';

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  Future<Folder>? folder;

  // DataProvider dprovider = SSHDataProvider(
  //     initialPath: "/media/",
  //     host: "",
  //     password: "",
  //     port: 22,
  //     username: "");

  // DataProvider dprovider = LocalDataProvider("${(await getApplicationDocumentsDirectory()).path}/../Downloads/");
  DataProvider dprovider = LocalDataProvider("/home");

  final ScrollController _controller = ScrollController();

  _MyHomePageState() {
    folder = dprovider.listOfFiles();
  }

  @override
  Widget build(BuildContext context) {
    final width = MediaQuery.of(context).size.width;

    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: FutureBuilder(
        future: folder,
        builder: (context, snapshot) {
          if (snapshot.hasData) {
            final data = snapshot.data!;

            return GridView.builder(
              controller: _controller,
              gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
                crossAxisSpacing: 0,
                mainAxisSpacing: 0,
                crossAxisCount: width ~/ 300,
              ),
              itemCount: data.items.length + 1,
              itemBuilder: (context, index) {
                if (index == 0) {
                  return ImageTile(
                    child: const Icon(Icons.arrow_back, size: 142),
                    onClick: () {
                      setState(() {
                        folder = dprovider.listOfFiles(uri: data.parent);
                      });
                    },
                  );
                }

                final elem = data.items[index - 1];
                return ImageTile(
                    dtaProvider: dprovider,
                    imageUri: elem.isFolder ? null : elem.uri,
                    onClick: () {
                      if (elem.isFolder) {
                        setState(() {
                          folder = 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: dprovider,
                              items: d,
                              idx: newidx,
                            );
                          }),
                        );
                      }
                    },
                    child: elem.isFolder
                        ? Column(
                            mainAxisAlignment: MainAxisAlignment.center,
                            children: [
                              const Icon(Icons.folder_open, size: 142),
                              Text(elem.name)
                            ],
                          )
                        : null);
              },
            );
          } else if (snapshot.hasError) {
            return const Text("Error loading files");
          }

          return const CircularProgressIndicator(
            strokeWidth: 3,
          );
        },
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          _controller.animateTo(.0,
              duration: const Duration(milliseconds: 400),
              curve: Curves.easeInOutQuad);
        },
        tooltip: 'Increment',
        child: const Icon(Icons.arrow_upward),
      ),
    );
  }
}