appbar now stay same, also rework, no more pushing and popping, manual animations

lib/sftp_explorer.dart

@@ -7,10 +7,9 @@ import 'package:flutter/material.dart';
 import 'package:fluxcloud/sftp_worker.dart';
 
 class SftpExplorer extends StatefulWidget {
-  const SftpExplorer({super.key, required this.sftpWorker, this.path = '/'});
+  const SftpExplorer({super.key, required this.sftpWorker});
 
   final SftpWorker sftpWorker;
-  final String path;
 
   @override
   State<SftpExplorer> createState() => _SftpExplorerState();
@@ -18,6 +17,8 @@ class SftpExplorer extends StatefulWidget {
 
 class _SftpExplorerState extends State<SftpExplorer> {
 
+  String path = '/';
+
   bool _isLoading = true;
   late List<SftpName> _dirContents;
 
@@ -32,7 +33,7 @@ class _SftpExplorerState extends State<SftpExplorer> {
   Future<void> _listDir() async {
     setState(() => _isLoading = true);
     try {
-      _dirContents =  await widget.sftpWorker.listdir(widget.path);
+      _dirContents =  await widget.sftpWorker.listdir(path);
     }
     catch (e) {
       if (mounted) {
@@ -46,12 +47,25 @@ class _SftpExplorerState extends State<SftpExplorer> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      // TODO: make appbar same for all directories
       appBar: AppBar(
         toolbarHeight: 75,
         title: Text('Explorer'),
         elevation: 2,
         actionsPadding: EdgeInsets.only(right: 20),
+        leading: IconButton(
+          onPressed: () {
+            if (path == '/') {
+              // TODO: figure this out
+              // Navigator.pop(context);
+            }
+            else {
+              path = path.substring(0, path.length - 1);
+              path = path.substring(0, path.lastIndexOf('/')+1);
+              _listDir();
+            }
+          },
+          icon: Icon(Icons.arrow_back)
+        ),
         actions: [
           if (_progress != null)
           Stack(
@@ -73,7 +87,26 @@ class _SftpExplorerState extends State<SftpExplorer> {
         ],
       ),
       floatingActionButton: _buildFABs(context),
-      body: _isLoading ? Center(child: CircularProgressIndicator()) : ListView.builder(
+      body: AnimatedSwitcher(
+        duration: Duration(milliseconds: 300),
+        transitionBuilder: (child, animation) {
+          final curved = CurvedAnimation(
+            parent: animation,
+            curve: Curves.fastOutSlowIn
+          );
+          return FadeTransition(
+            opacity: curved,
+            child: ScaleTransition(
+              scale: Tween<double>(
+                begin: 0.92,
+                end: 1
+              ).animate(curved),
+              child: child,
+            ),
+          );
+        },
+        child: _isLoading ? Center(child: CircularProgressIndicator()) : ListView.builder(
+          key: ValueKey(path),
           itemCount: _dirContents.length,
           itemBuilder: (context, index) {
             final dirEntry = _dirContents[index];
@@ -114,7 +147,7 @@ class _SftpExplorerState extends State<SftpExplorer> {
                             TextButton(
                               onPressed: () async {
                                 // try {
-                              //   await widget.sftpWorker.rename('${widget.path}${dirEntry.filename}', '${widget.path}${newNameController.text}');
+                                //   await widget.sftpWorker.rename('${path}${dirEntry.filename}', '${widget.path}${newNameController.text}');
                                 //   _listDir();
                                 // }
                                 // on SftpStatusError catch (e) {
@@ -162,10 +195,10 @@ class _SftpExplorerState extends State<SftpExplorer> {
                                 //     }
                                 //     await widget.sftpWorker.rmdir(path);
                                 //   }
-                              //   await removeRecursively('${widget.path}${dirEntry.filename}/');
+                                //   await removeRecursively('${path}${dirEntry.filename}/');
                                 // }
                                 // else {
-                              //   await widget.sftpWorker.remove('${widget.path}${dirEntry.filename}');
+                                //   await widget.sftpWorker.remove('${path}${dirEntry.filename}');
                                 // }
                                 // _listDir();
                                 // if (context.mounted) {
@@ -184,17 +217,14 @@ class _SftpExplorerState extends State<SftpExplorer> {
               ),
               onTap: () {
                 if (dirEntry.attr.isDirectory) {
-                Navigator.push(context, MaterialPageRoute(
+                  path = '$path${dirEntry.filename}/';
-                  builder: (context) => SftpExplorer(
+                  _listDir();
-                    sftpWorker: widget.sftpWorker,
-                    path: '${widget.path}${dirEntry.filename}/',
-                  )
-                ));
                 }
               },
             );
           }, 
         )
+      )
     );
   }
 
@@ -222,7 +252,7 @@ class _SftpExplorerState extends State<SftpExplorer> {
                   TextButton(
                     onPressed: () async {
                       try {
-                        await widget.sftpWorker.mkdir('${widget.path}${nameController.text}');
+                        await widget.sftpWorker.mkdir('${path}${nameController.text}');
                         _listDir();
                       }
                       catch (e) {
@@ -255,7 +285,7 @@ class _SftpExplorerState extends State<SftpExplorer> {
               filePaths = files.map((file) => file.path).toList();
             }
             try {
-              await for (final progress in widget.sftpWorker.uploadFiles(widget.path, filePaths)) {
+              await for (final progress in widget.sftpWorker.uploadFiles(path, filePaths)) {
                 setState(() => _progress = progress);
               }
             }