Kasir Grosir: starter Flutter POS (scaffold awal)

lib/widgets/app_drawer.dart

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+import 'package:flutter/material.dart';
+import 'menu_tile.dart';
+
+class AppDrawer extends StatelessWidget {
+  const AppDrawer({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Drawer(
+      child: SafeArea(
+        child: Column(
+          children: [
+            UserAccountsDrawerHeader(
+              accountName: const Text('Toko UMKM'),
+              accountEmail: const Text('user@contoh.com'),
+              currentAccountPicture: const CircleAvatar(child: Text('TK')),
+            ),
+            Expanded(
+              child: ListView(
+                children: const [
+                  MenuTile(icon: Icons.dashboard, title: 'Dashboard', route: '/dashboard'),
+                  MenuTile(icon: Icons.point_of_sale, title: 'POS', route: '/pos'),
+                  MenuTile(icon: Icons.inventory_2, title: 'Products', route: '/products'),
+                  MenuTile(icon: Icons.people, title: 'Customers', route: '/customers'),
+                  MenuTile(icon: Icons.local_shipping, title: 'Suppliers', route: '/suppliers'),
+                  MenuTile(icon: Icons.playlist_add_check, title: 'Purchase Orders', route: '/purchase_orders'),
+                  MenuTile(icon: Icons.money, title: 'Accounts Receivable', route: '/ar'),
+                  MenuTile(icon: Icons.warehouse, title: 'Inventory', route: '/inventory'),
+                  MenuTile(icon: Icons.bar_chart, title: 'Reports', route: '/reports'),
+                  MenuTile(icon: Icons.settings, title: 'Settings', route: '/settings'),
+                  MenuTile(icon: Icons.people_alt, title: 'Users', route: '/users'),
+                  MenuTile(icon: Icons.build, title: 'Utilities', route: '/utilities'),
+                ],
+              ),
+            ),
+            ListTile(
+              leading: const Icon(Icons.exit_to_app),
+              title: const Text('Logout'),
+              onTap: () {},
+            )
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/widgets/menu_tile.dart

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+import 'package:flutter/material.dart';
+
+class MenuTile extends StatelessWidget {
+  final IconData icon;
+  final String title;
+  final String route;
+
+  const MenuTile({
+    Key? key,
+    required this.icon,
+    required this.title,
+    required this.route,
+  }) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return ListTile(
+      leading: Icon(icon),
+      title: Text(title),
+      onTap: () {
+        Navigator.pop(context); // close drawer
+        if (ModalRoute.of(context)?.settings.name != route) {
+          Navigator.pushNamed(context, route);
+        }
+      },
+    );
+  }
+}

lib/widgets/template_screen.dart

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+import 'package:flutter/material.dart';
+
+class TemplateScreen extends StatelessWidget {
+  final String title;
+  final Widget body;
+  final List<Widget>? actions;
+  final FloatingActionButton? fab;
+  final Widget? drawer;
+
+  const TemplateScreen({
+    Key? key,
+    required this.title,
+    required this.body,
+    this.actions,
+    this.fab,
+    this.drawer,
+  }) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(title),
+        actions: actions,
+      ),
+      drawer: drawer,
+      body: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: body,
+      ),
+      floatingActionButton: fab,
+    );
+  }
+}