[Flutter] Snippets #flutter

snippets.dart

///
/// Converting class objects to JSON string in Flutter
///
class Employee {
  final String name;
  final String email;

  Employee(this.name, this.email);

  Employee.fromJson(Map<String, dynamic> json)
      : name = json['name'],
        email = json['email'];

  Map<String, dynamic> toJson() =>
    {
      'name': name,
      'email': email,
    };
}

//Now CONVERT SIMPLE JSON TO FLUTTER OBJECT 
Map employeeMap = jsonDecode(jsonString);
var employee = Employee.fromJson(employeeMap);

//CONVERT FLUTTER OBJECT TO SIMPLE JSON STRING
String json = jsonEncode(employee);


///
/// Hide title from BottomNavigationBar in Flutter
///
BottomNavigationBar(
    showSelectedLabels: false,
    showUnselectedLabels: false,
    items: <BottomNavigationBarItem> []
);

///
/// Add box shadow to container in flutter
///
new Container(
    height: 200.0,
    decoration: new BoxDecoration(
        boxShadow: [
          BoxShadow(
            color: Colors.red,
            blurRadius: 25.0, // soften the shadow
            spreadRadius: 5.0, //extend the shadow
            offset: Offset(
              15.0, // Move to right 10  horizontally
              15.0, // Move to bottom 10 Vertically
            ),
          )
        ],
    );
    child: new Text("Hello world"),
);

///
///Add border to widget in Flutter
///
//ADD BORDER TO ALL SIDES
Container(
  decoration: BoxDecoration(
    border: Border.all(
      color: Colors.red,
      width: 3.0,
    ),
  ),
)

//ADD BORDER TO SPECIFIC SIDES
Container(
  decoration: BoxDecoration(
    border: Border(
      left: BorderSide(
        color: Colors.red,
        width: 3.0,
      ),
      top: BorderSide(
        color: Colors.blue,
        width: 3.0,
      ),
    ),
  ),
)
  
///
///Simple stateless widget in Flutter
///
import 'package:flutter/material.dart'

class WidgetName extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        title: 'App title',
        home: Container(
            child: Text('Hello World')
        )
    )
  }
}

///
/// Add padding to container in Flutter
///
Container(
    padding: EdgeInsets.all(50.0),
    child: Text(
        'Hello world'
    ),
),

///
/// Add margin to container in Flutter
///
Container(
    margin: EdgeInsets.all(40.0),
    child: Text(
        'Hello world'
    ),
),

///
/// Add border radius to container in flutter
///
  Container(
    margin: EdgeInsets.all(30.0),
    padding: EdgeInsets.all(20.0),
    decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(10.0),
        color: Colors.red,
    ),
    child: Text(
        'Hello world'
    ),
),

///
/// Add border to container in flutter
///
  Container(
    decoration: BoxDecoration(
        border: Border.all(
            width: 2.0,
            color: Colors.blue,
            style: BorderStyle.solid
        ),
    ),
    child: Text(
        'Hello world'
    ),
),