im_themed 0.0.3

package for parsing flutter theme from json, with support for css like syntax

example/lib/main.dart

import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:im_themed/im_themed.dart';

void main() async {
  runApp(
    const ImThemedApp(
      app: SingleThemeApp(),
    ),
  );
}

class SingleThemeApp extends StatelessWidget {
  const SingleThemeApp({super.key});

  @override
  Widget build(BuildContext context) {
    return ImThemedApp(
      app: Builder(builder: (context) {
        return MaterialApp(
          theme: context.theme,
          debugShowCheckedModeBanner: false,
          home: const MainPage(),
        );
      }),
    );
  }
}

class MainPage extends StatefulWidget {
  const MainPage({super.key});

  @override
  State<MainPage> createState() => _MainPageState();
}

class _MainPageState extends State<MainPage> {
  final JsonEncoder encoder = const JsonEncoder.withIndent('  ');
  late final textController = TextEditingController(
    text: encoder.convert(context.theme.toJson()),
  );

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.primary,
        title: Text(
          'Live Theme Editor',
          style: Theme.of(context).textTheme.headlineMedium?.copyWith(
                    color: Theme.of(context).colorScheme.onPrimary,
                  ) ??
              TextStyle(color: Theme.of(context).colorScheme.onPrimary),
        ),
      ),
      body: SafeArea(
        top: false,
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            Expanded(
              child: TextField(
                controller: textController,
                decoration: const InputDecoration(
                  contentPadding: EdgeInsets.all(20.0),
                ),
                expands: true,
                minLines: null,
                maxLines: null,
              ),
            ),
            Padding(
              padding: const EdgeInsets.all(8.0),
              child: ElevatedButton(
                onPressed: updateAppTheme,
                child: const Padding(
                  padding: EdgeInsets.all(10.0),
                  child: Text('Apply Theme'),
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }

  void updateAppTheme() {
    try {
      final themeData = ThemeDataJsonConverterExtension.fromJson(
        jsonDecode(textController.text),
      );
      context.setTheme(themeData);
    } catch (error) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text(error.toString()),
        ),
      );
    }
  }
}