import "dart:async";
import "package:flutter/material.dart";
class Todo {
final String title;
bool completed;
Todo(this.title, {this.completed = false});
}
class TodoBloc {
final _todoController = StreamController<List<Todo>>.broadcast();
final List<Todo> _todos = [];
Stream<List<Todo>> get todoStream {
return _todoController.stream;
}
void addTodo(Todo todo) {
_todos.add(todo);
_todoController.sink.add(_todos);
}
void toggleTodoCompletion(int index) {
_todos[index].completed = !_todos[index].completed;
_todoController.sink.add(_todos);
}
void dispose() {
_todoController.close();
}
}
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: "Bloc Items Edit Delete List",
debugShowCheckedModeBanner: false,
theme: ThemeData(
primarySwatch: Colors.grey,
),
home: const AddToCart(),
);
}
}
class AddToCart extends StatefulWidget {
const AddToCart({super.key});
@override
State<AddToCart> createState() {
return AddToCartState();
}
}
class AddToCartState extends State<AddToCart> {
final TodoBloc _todoBloc = TodoBloc();
final TextEditingController _controller = TextEditingController();
final List<String> cartItems = [];
@override
void dispose() {
_controller.dispose();
_todoBloc.dispose();
super.dispose();
}
void addToCart(String item) {
setState(
() {
cartItems.add(item);
},
);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text("Cart Items"),
centerTitle: true,
backgroundColor: Colors.grey,
),
body: StreamBuilder<List<Todo>>(
stream: _todoBloc.todoStream,
builder: (context, snapshot) {
return ListView.builder(
itemCount: snapshot.data?.length ?? 0,
itemBuilder: (context, index) {
final todo = snapshot.data![index];
return Card(
child: ListTile(
leading: CircleAvatar(
backgroundColor: Colors.grey.shade400,
child: Text(
todo.title[0],
style: const TextStyle(fontWeight: FontWeight.bold),
),
),
title: Text(
todo.title,
style: TextStyle(
fontWeight: FontWeight.bold,
decoration:
todo.completed ? TextDecoration.lineThrough : null),
),
subtitle: Text(todo.title),
trailing: IconButton(
icon: Icon(todo.completed
? Icons.check_box
: Icons.check_box_outline_blank),
onPressed: () {
_todoBloc.toggleTodoCompletion(index);
},
),
onTap: () {
addToCart(todo.title);
_todoBloc.toggleTodoCompletion(index);
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(
content: Text("${todo.title} Added in the List"),
duration: const Duration(seconds: 1),
backgroundColor: Colors.green,
),
);
},
),
);
},
);
},
),
floatingActionButton: FloatingActionButton(
onPressed: () {
showDialog(
context: context,
builder: (context) {
return AlertDialog(
title: const Text("Add data"),
content: SizedBox(
width: 300.0,
child: TextFormField(
controller: _controller,
maxLines: 1,
maxLength: 100,
decoration: const InputDecoration(
hintText: "Enter the data",
),
),
),
actions: <Widget>[
TextButton(
onPressed: () {
_todoBloc.addTodo(Todo(_controller.text));
_controller.clear();
Navigator.pop(context);
},
style: TextButton.styleFrom(
backgroundColor: Colors.blue,
),
child: const Text(
"Add",
style: TextStyle(
fontWeight: FontWeight.bold, color: Colors.white),
),
),
],
);
},
);
},
backgroundColor: Colors.blue,
child: const Icon(Icons.add, color: Colors.white, size: 30.0),
),
persistentFooterButtons: [
Row(
mainAxisAlignment: MainAxisAlignment.end,
children: [
// IconButton(),
Badge(
backgroundColor: Colors.purple,
label: const Text("0",
style: TextStyle(fontWeight: FontWeight.bold),
),
child: ElevatedButton(
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) {
return CartPage(cartItems: cartItems);
},
),
);
},
style: ElevatedButton.styleFrom(
backgroundColor: Colors.blue,
),
child: const Text(
"Open Cart",
style:
TextStyle(fontWeight: FontWeight.bold, color: Colors.white),
),
),
),
],
),
],
);
}
}
class CartPage extends StatefulWidget {
const CartPage({super.key, required this.cartItems});
final List<String> cartItems;
@override
State<CartPage> createState() {
return CartPageState();
}
}
class CartPageState extends State<CartPage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text("Cart Items"),
centerTitle: true,
backgroundColor: Colors.grey,
),
body: widget.cartItems.isEmpty
? Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Image.network("https://cdni.iconscout.com/illustration/free/thumb/"
"free-empty-cart-4085814-3385483.png?f=webp",
width: 200.0,
height: 200.0,
),
const Text("Your Cart is Empty",
style: TextStyle(fontWeight: FontWeight.bold, fontSize: 30.0),
),
const SizedBox(height: 30.0),
const Text("Explore products and shop your favourite items",
style: TextStyle(fontWeight: FontWeight.bold),
),
],
),)
: ListView.builder(
itemCount: widget.cartItems.length,
itemBuilder: (context, index) {
return Card(
child: ListTile(
leading: CircleAvatar(
backgroundColor: Colors.grey.shade400,
child: Text(widget.cartItems[index][0],
style: const TextStyle(fontWeight: FontWeight.bold),
),
),
title: Text(widget.cartItems[index],
style: const TextStyle(fontWeight: FontWeight.bold),
),
subtitle: Text(widget.cartItems[index]),
trailing: Row(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
IconButton(
onPressed: () {
_showUpdateDialog(
context, index, widget.cartItems[index]);
},
icon: const Icon(Icons.edit),
),
IconButton(
onPressed: () {
_deleteItem(index);
},
icon: const Icon(Icons.delete, color: Colors.red),
),
],
),
),
);
},
),
);
}
/// CREATING UPDATE METHOD TO UPDATE THE ITEM FROM CART ITEM LIST
void _showUpdateDialog(BuildContext context, int index, String currentItem) {
final TextEditingController updateController =
TextEditingController(text: currentItem);
showDialog(
context: context,
builder: (context) {
return AlertDialog(
title: const Text("Update Item"),
content: SizedBox(
width: 300.0,
child: TextFormField(
controller: updateController,
maxLength: 100,
maxLines: 1,
decoration: const InputDecoration(
hintText: "Enter updated item",
),
),
),
actions: <Widget>[
TextButton(
onPressed: () {
Navigator.pop(context);
},
child: const Text(
"Cancel",
style: TextStyle(fontWeight: FontWeight.bold),
),
),
TextButton(
onPressed: () {
setState(
() {
widget.cartItems[index] = updateController.text;
},
);
Navigator.pop(context);
},
child: const Text(
"Update",
style: TextStyle(fontWeight: FontWeight.bold),
),
),
],
);
},
);
}
/// CREATING DELETE METHOD TO DELETE THE ITEM FROM CART ITEM LIST
void _deleteItem(int index) {
showDialog(
context: context,
builder: (context) {
return AlertDialog(
title: const Text(
"Confirm delete",
style: TextStyle(fontWeight: FontWeight.bold),
),
content: const Text("Are you sure you want to delete this item ?"),
actions: <Widget>[
TextButton(
onPressed: () {
Navigator.pop(context);
},
child: const Text(
"Cancel",
style: TextStyle(fontWeight: FontWeight.bold),
),
),
TextButton(
onPressed: () {
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(
content: Text("${widget.cartItems[index]} deleted..."),
duration: const Duration(seconds: 1),
backgroundColor: Colors.red,
),
);
setState(
() {
widget.cartItems.removeAt(index);
},
);
Navigator.pop(context);
},
child: const Text(
"Delete",
style: TextStyle(fontWeight: FontWeight.bold),
),
),
],
);
},
);
}
}
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