v3

lib/v1/app/navigation/app_router_delegate.dart

@@ -0,0 +1,114 @@
+import 'package:flutter/material.dart';
+
+import '../../pages/color/color_page.dart';
+import '../../pages/empty/empty_page.dart';
+import '../../pages/settings/settings_page.dart';
+import '../../pages/counter/counter_page.dart';
+import '../../pages/user/user_page.dart';
+import '../../transition/fade_transition_page.dart';
+import '../../transition/no_transition_page.dart';
+
+const List<String> kDestinationsPaths = [
+  '/color',
+  '/counter',
+  '/user',
+  '/settings',
+];
+
+AppRouterDelegate router = AppRouterDelegate();
+
+class AppRouterDelegate extends RouterDelegate<Object> with ChangeNotifier {
+  String _path = '/color';
+
+  String get path => _path;
+
+  set path(String value) {
+    if (_path == value) return;
+    _path = value;
+    notifyListeners();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Navigator(
+      onPopPage: _onPopPage,
+      pages: _buildPageByPath(path),
+    );
+  }
+
+  List<Page> _buildPageByPath(String path) {
+    Widget? child;
+    if (path == kDestinationsPaths[0]) {
+      child = const ColorPage();
+    }
+    if (path == kDestinationsPaths[1]) {
+      child = const CounterPage();
+    }
+    if (path == kDestinationsPaths[2]) {
+      child = const UserPage();
+    }
+    if (path == kDestinationsPaths[3]) {
+      child = const SettingPage();
+    }
+    return [
+      FadeTransitionPage(
+        key: ValueKey(path),
+        child: child ?? const EmptyPage(),
+      )
+    ];
+  }
+
+  @override
+  Future<bool> popRoute() async {
+    print('=======popRoute=========');
+    return true;
+  }
+
+  bool _onPopPage(Route route, result) {
+    return route.didPop(result);
+  }
+
+  @override
+  Future<void> setNewRoutePath(configuration) async {}
+}
+
+// class AppRouterDelegate extends RouterDelegate<String> with ChangeNotifier, PopNavigatorRouterDelegateMixin {
+//
+//   List<String> _value = ['/'];
+//
+//
+//   List<String> get value => _value;
+//
+//   set value(List<String> value){
+//     _value = value;
+//     notifyListeners();
+//   }
+//
+//   @override
+//   Widget build(BuildContext context) {
+//     return Navigator(
+//       onPopPage: _onPopPage,
+//       pages: _value.map((e) => _pageMap[e]!).toList(),
+//     );
+//   }
+//
+//   final Map<String, Page> _pageMap = const {
+//     '/': MaterialPage(child: HomePage()),
+//     'a': MaterialPage(child: PageA()),
+//     'b': MaterialPage(child: PageB()),
+//     'c': MaterialPage(child: PageC()),
+//   };
+//
+//   bool _onPopPage(Route route, result) {
+//     _value = List.of(_value)..removeLast();
+//     notifyListeners();
+//     return route.didPop(result);
+//   }
+//
+//   @override
+//   GlobalKey<NavigatorState>? navigatorKey = GlobalKey<NavigatorState>();
+//
+//   @override
+//   Future<void> setNewRoutePath(String configuration) async{
+//   }
+// }

lib/v1/app/navigation/views/app_navigation_rail.dart

@@ -0,0 +1,53 @@
+import 'package:flutter/material.dart';
+import '../app_router_delegate.dart';
+
+class AppNavigationRail extends StatefulWidget {
+  const AppNavigationRail({super.key});
+
+  @override
+  State<AppNavigationRail> createState() => _AppNavigationRailState();
+}
+
+class _AppNavigationRailState extends State<AppNavigationRail> {
+  final List<NavigationRailDestination> destinations = const [
+    NavigationRailDestination(icon: Icon(Icons.color_lens_outlined), label: Text("颜色板")),
+    NavigationRailDestination(icon: Icon(Icons.add_chart), label: Text("计数器")),
+    NavigationRailDestination(icon: Icon(Icons.person), label: Text("我的")),
+    NavigationRailDestination(icon: Icon(Icons.settings), label: Text("设置")),
+  ];
+
+  @override
+  void initState() {
+    super.initState();
+    router.addListener(_onRouterChange);
+  }
+
+  @override
+  void dispose() {
+    router.removeListener(_onRouterChange);
+    super.dispose();
+  }
+
+  int _index = 0 ;
+
+  @override
+  Widget build(BuildContext context) {
+    return NavigationRail(
+      labelType: NavigationRailLabelType.all,
+      onDestinationSelected: _onDestinationSelected,
+      destinations: destinations,
+      selectedIndex: _index,
+    );
+  }
+
+  void _onDestinationSelected(int index) {
+    router.path = kDestinationsPaths[index];
+  }
+
+  void _onRouterChange() {
+    _index = kDestinationsPaths.indexOf(router.path);
+    setState(() {
+
+    });
+  }
+}

lib/v1/app/unit_app.dart

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+import 'package:flutter/material.dart';
+import 'navigation/app_router_delegate.dart';
+import 'navigation/views/app_navigation_rail.dart';
+
+class UnitApp extends StatelessWidget {
+  const UnitApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+
+    return MaterialApp(
+        theme: ThemeData(
+            appBarTheme: const AppBarTheme(
+                elevation: 0,
+                iconTheme: IconThemeData(color: Colors.black),
+                titleTextStyle: TextStyle(
+                  color: Colors.black,
+                  fontSize: 18,
+                  fontWeight: FontWeight.bold,
+                ))),
+        debugShowCheckedModeBanner: false,
+        home: Scaffold(
+          body: Row(
+            children: [
+              const AppNavigationRail(),
+              Expanded(
+                child: Router(
+                  routerDelegate: router,
+                  backButtonDispatcher: RootBackButtonDispatcher(),
+                ),
+              ),
+            ],
+          ),
+        ));
+  }
+}
+
+