adding packages

deprecated/scaffold_tab_bar/lib/scaffold_tab_bar.dart

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+export 'src/tab_bar.dart';

deprecated/scaffold_tab_bar/lib/src/tab_bar.dart

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+import 'package:flutter/material.dart';
+
+class ScaffoldTabBar extends StatefulWidget {
+  const ScaffoldTabBar({
+    Key key,
+    this.routes = const {},
+    this.children,
+    this.tabPopsToFirst = true,
+    this.scaffoldKey,
+    this.drawer,
+    this.endDrawer,
+    this.persistentFooterButtons,
+    this.backgroundColor,
+    this.bottomNavigationBarBackgroundColor,
+    this.bottomNavigationBarType = BottomNavigationBarType.fixed,
+    this.floatingActionButton,
+    this.floatingActionButtonAnimator,
+    this.floatingActionButtonLocation,
+  }) : super(key: key);
+
+  final Color backgroundColor, bottomNavigationBarBackgroundColor;
+  final BottomNavigationBarType bottomNavigationBarType;
+  final List<ScreenTab> children;
+  final Widget drawer, endDrawer;
+  final List<Widget> persistentFooterButtons;
+  final GlobalKey<ScaffoldState> scaffoldKey;
+  final FloatingActionButton floatingActionButton;
+  final FloatingActionButtonAnimator floatingActionButtonAnimator;
+  final FloatingActionButtonLocation floatingActionButtonLocation;
+  final Map<String, WidgetBuilder> routes;
+
+  /// If tab is currently selected, tapping again will pop to first page
+  final bool tabPopsToFirst;
+
+  @override
+  _ScaffoldTabBarState createState() => _ScaffoldTabBarState();
+}
+
+class _ScaffoldTabBarState extends State<ScaffoldTabBar> {
+  int _currentIndex = 0;
+  final List<GlobalKey<NavigatorState>> _keys = [];
+  List<ScreenTab> _screens = [];
+
+  @override
+  void didUpdateWidget(ScaffoldTabBar oldWidget) {
+    if (oldWidget.children != widget.children) {
+      if (mounted) {
+        setState(() => _setUp());
+      }
+    }
+    super.didUpdateWidget(oldWidget);
+  }
+
+  @override
+  void initState() {
+    _setUp();
+    super.initState();
+  }
+
+  void _setUp() {
+    _screens = widget.children;
+    _currentIndex = 0;
+    for (var screen in _screens) {
+      _keys.add(GlobalKey<NavigatorState>(debugLabel: screen?.debugLabel));
+    }
+  }
+
+  void _onTap(int val, BuildContext context) {
+    if (widget.tabPopsToFirst && _currentIndex == val) {
+      _keys[val].currentState.popUntil((route) => route.isFirst);
+    } else {
+      if (mounted) {
+        setState(() {
+          _currentIndex = val;
+        });
+      }
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    List<Widget> _children = [];
+    for (int i = 0; i < _screens.length; i++) {
+      _children.add(Navigator(
+        key: _keys[i],
+        onGenerateRoute: (settings) {
+          if (widget.routes.containsKey(settings.name)) {
+            return MaterialPageRoute(
+              settings: settings,
+              builder: widget.routes[settings.name],
+            );
+          }
+          return MaterialPageRoute(
+            settings: settings,
+            builder: (context) => _screens[i].screen,
+          );
+        },
+      ));
+    }
+    return Scaffold(
+      backgroundColor: widget?.backgroundColor,
+      key: widget?.scaffoldKey,
+      drawer: widget?.drawer,
+      endDrawer: widget?.endDrawer,
+      persistentFooterButtons: widget?.persistentFooterButtons,
+      floatingActionButton: widget?.floatingActionButton,
+      floatingActionButtonAnimator: widget?.floatingActionButtonAnimator,
+      floatingActionButtonLocation: widget?.floatingActionButtonLocation,
+      body: IndexedStack(
+        index: _currentIndex,
+        children: _children,
+      ),
+      bottomNavigationBar: BottomNavigationBar(
+        type: widget?.bottomNavigationBarType,
+        currentIndex: _currentIndex,
+        onTap: (val) => _onTap(val, context),
+        backgroundColor: widget?.bottomNavigationBarBackgroundColor ??
+            Theme.of(context).scaffoldBackgroundColor,
+        items: _screens.map((s) => s.tab).toList(),
+      ),
+    );
+  }
+}
+
+class ScreenTab {
+  const ScreenTab({
+    @required this.tab,
+    @required this.screen,
+    this.debugLabel,
+  });
+
+  final String debugLabel;
+  final Widget screen;
+  final BottomNavigationBarItem tab;
+}