Counter example

readme.md

Counter example

Created with <3 with dartpad.dev.

main.dart

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Chatiii',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const ChatPage(title: 'Chatiii Demo'),
    );
  }
}

class ChatPage extends StatefulWidget {
  final String title;

  const ChatPage({
    Key? key,
    required this.title,
  }) : super(key: key);

  @override
  State<ChatPage> createState() => _ChatPageState();
}

class _ChatPageState extends State<ChatPage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: ListView(
        reverse: true,
        children: const [
          ChatBubble(
            text: 'How was the concert?',
            isCurrentUser: false,
          ),
          ChatBubble(
            text: 'Awesome! Next time you gotta come as well!',
            isCurrentUser: true,
          ),
          ChatBubble(
            text: 'Ok, when is the next date?',
            isCurrentUser: false,
          ),
          ChatBubble(
            text: 'They\'re playing on the 20th of November',
            isCurrentUser: true,
          ),
          ChatBubble(
            text: 'Let\'s do it!',
            isCurrentUser: false,
          ),
        ],
      ),
    );
  }
}

class ChatBubble extends StatelessWidget {
  const ChatBubble({
    Key? key,
    required this.text,
    required this.isCurrentUser,
  }) : super(key: key);
  final String text;
  final bool isCurrentUser;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: EdgeInsets.fromLTRB(
        isCurrentUser ? 64.0 : 16.0,
        4,
        isCurrentUser ? 16.0 : 64.0,
        4,
      ),
      child: Align(
        // align the child within the container
        alignment: isCurrentUser ? Alignment.centerRight : Alignment.centerLeft,
        child: DecoratedBox(
          // chat bubble decoration
          decoration: BoxDecoration(
            color: isCurrentUser ? Colors.blue : Colors.grey[300],
            borderRadius: BorderRadius.circular(16),
          ),
          child: Padding(
            padding: const EdgeInsets.all(12),
            child: Text(
              text,
              style: Theme.of(context).textTheme.bodyText1!.copyWith(
                  color: isCurrentUser ? Colors.white : Colors.black87,),
            ),
          ),
        ),
      ),
    );
  }
}