many_callbacks_widget_sample.dart

class AwesomeWidget extends StatelessWidget {
  const AwesomeWidget({
    super.key,
  });
  
  @override
  Widget build(BuildContext, context) {
    void showUserScreen() {
      // show user screen
    }
    
    Future<void> follow() async {
      // follow user
    }
    
    Future<void> unfollow() {
      // unfollow user
    }
    
    void copyUserId() {
      // copy user id
    }
    
    return ListTile(
      onLongPress: copyUserId,
      // こんなウィジェットはないけどイメージで
      leading: Thumbnail(
        userId: user.id,
        onPressed: showUserScreen,
      ),
      title: GestureDetector(
        onTap: showUserScreen,
        Text(user.name),
      ),
      trailing: ElevatedButton(
        onPressed: user.isFollowing ? unfollow : follow,
        child: Text(user.isFollowing ? 'フォローを外す' : 'フォロー'),
      ),
    );
  }
}