Custom icon with button

outlined_toggle_button.dart

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  final String title;

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

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            renderOutlineButtonWithIcon(true),
            const SizedBox(height: 8),
            renderOutlineButtonWithIcon(false),
          ],
        ),
      ),
    );
  }

  final _selectedStyle = (
        iconColor: Colors.black,
        borderColor: const Color(0xFF323F66),
        textColor: const Color(0xFF242F53),
      );
  
  final _unselectedStyle = (
    iconColor: Colors.grey,
    borderColor: const Color(0xFFD7DBDF),
    textColor: const Color(0xFF969FAC)
  );

  Widget renderOutlineButtonWithIcon(bool isSelected) {
    final style = isSelected ? _selectedStyle : _unselectedStyle;

    return OutlinedButton(
      onPressed: () {},
      style: OutlinedButton.styleFrom(
        padding: EdgeInsets.zero,
        shape: RoundedRectangleBorder(
          side: BorderSide(width: 0.75, color: style.borderColor),
          borderRadius: BorderRadius.circular(6),
        ),
        splashFactory: NoSplash.splashFactory,
      ),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Icon(Icons.check, size: 16, color: style.iconColor),
          const SizedBox(width: 4),
          Text(
            '동의',
            style: TextStyle(
              color: style.textColor,
              fontSize: 14.22,
              fontFamily: 'Pretendard',
              fontWeight: FontWeight.w700,
              height: 1.13,
            ),
          ),
        ],
      ),
    );
  }
}