update

.config/Code/User/History/52c1244e/MJRn.dart

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+import 'dart:io';
+
+import 'package:io/io.dart';
+import 'package:permission_handler/permission_handler.dart';
+import 'package:flutter/material.dart';
+import 'package:filemanager/file_button.dart';
+
+void main(){
+  runApp(const MyApp());
+}
+
+class MyApp extends StatelessWidget{
+  const MyApp({super.key});
+
+  void askPermission() async{
+    var status = await Permission.manageExternalStorage.request();
+    if(!status.isGranted) throw Exception('Permssion Denied');
+  }
+
+  @override
+  Widget build(BuildContext context){
+    askPermission();
+    return MaterialApp(
+      title: 'File Manager',
+      theme: ThemeData(
+        colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue),
+        useMaterial3: true,
+      ),
+      darkTheme: ThemeData.dark(useMaterial3: true),
+      home: const MyHomePage(title: 'File Manager'),
+    );
+  }
+}
+
+enum FMMode{normal, selection}
+
+class MyHomePage extends StatefulWidget{
+  const MyHomePage({super.key, required this.title});
+  final String title;
+
+  @override
+  State<MyHomePage> createState() => _MyHomePageState();
+}
+
+class _MyHomePageState extends State<MyHomePage>{
+
+  //TODO: add popupmenubutton for selected items
+
+  String _currentDir = '/storage/emulated/0';
+  List<Widget> _list = List.empty(growable: true);
+  FloatingActionButton? _faButton;
+  FMMode _mode = FMMode.normal;
+  List<Widget> _selected = List.empty(growable: true);
+
+  @override
+  void initState(){
+    super.initState();
+    getDirButtons(_currentDir);
+  }
+
+  void refresh(){
+    setState((){});
+  }
+
+  void selectionList(FileButton selected, bool option){
+    setState((){
+      if(option){
+        _selected.add(selected);
+      }
+      else{
+        _selected.remove(selected);
+      }
+    });
+    if(_selected.isEmpty){
+      _mode = FMMode.normal;
+    }
+  }
+
+  FMMode getMode(){
+    return _mode;
+  }
+
+  void setMode(FMMode mode){
+    setState((){
+      _mode = mode;
+    });
+  }
+
+  void copyFile(FileSystemEntity fsEntity, FileOptions fileOption){
+    setState((){
+      _faButton = FloatingActionButton.extended(
+        onPressed: (){
+          if(fsEntity is File){
+            fsEntity.copySync('$_currentDir/${fsEntity.path.split(Platform.pathSeparator).last}');
+          }
+          else{
+            copyPathSync(fsEntity.path, '$_currentDir/${fsEntity.path.split(Platform.pathSeparator).last}');
+          }
+          if(fileOption == FileOptions.cut && fsEntity.path != '$_currentDir/${fsEntity.path.split(Platform.pathSeparator).last}'){
+            fsEntity.deleteSync(recursive: true);
+          }
+          _faButton = null;
+          getDirButtons(_currentDir);
+        },
+        label: const Row(
+          children: [
+            Icon(Icons.paste),
+            SizedBox(width: 10,),
+            Text('Paste'),
+          ],
+        )
+      ); 
+    });
+  }
+
+  void openFile(FileSystemEntity fsEntity, String name){
+    setState((){
+      if(fsEntity is Directory){
+        _currentDir = '$_currentDir${Platform.pathSeparator}$name';
+      } 
+      else if(fsEntity is File){
+        //TODO: opening file logic
+      }
+    });
+    getDirButtons(_currentDir);
+  }
+
+  void backButtonPressed(){
+    setState((){
+      if(_mode == FMMode.normal){
+        if(_currentDir != '/storage/emulated/0'){
+          _currentDir = _currentDir.substring(0, _currentDir.lastIndexOf(Platform.pathSeparator));
+        }
+      }
+      else if(_mode == FMMode.selection){
+        _mode = FMMode.normal;
+      }
+    });
+    getDirButtons(_currentDir);
+  }
+
+  void getDirButtons(String dir){
+    setState((){
+      _list = List.empty(growable: true);
+      Directory directory = Directory(dir);
+      try{
+        directory.listSync().forEach((element) => _list.add(FileButton(
+            key: UniqueKey(),
+            fsEntity: element,
+            openFile: openFile,
+            refresh: refresh,
+            copyFile: copyFile,
+            setMode: setMode,
+            getMode: getMode,
+            selectionList: selectionList,
+          )));
+      }
+      on PathAccessException{
+        _list = List.empty(growable: true);
+      }
+    });
+  }
+
+  @override
+  Widget build(BuildContext context){
+    var alignment = Alignment.topCenter;
+    if(_list.isEmpty){
+      alignment = Alignment.center;
+      _list.add(const Center(
+        child: Text('nothing in this directory'),
+      ));
+    }
+
+    return Scaffold(
+      appBar: AppBar(
+        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
+        title: Text(widget.title),
+        leading: IconButton(onPressed: backButtonPressed, icon: const Icon(Icons.arrow_back)),
+      ),
+      body: Align(
+        alignment: alignment,
+        child: ListView(
+          shrinkWrap: true,
+          children: _list,
+        ),
+      ),
+      floatingActionButton: _faButton
+    );
+  }
+}