one_ui_flutter_app/lib/widget/loading_page_widget.dart

import 'package:flutter/material.dart';

class LoadingPageWidget extends StatelessWidget {
  final String title;
  final Color color;
  final Size size;
  final double fontSize;
  final double circleSize;
  const LoadingPageWidget({
    Key? key,
    required this.size,
    required this.title,
    this.color = Colors.blue,
    required this.circleSize,
    required this.fontSize,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Material(
      child: Container(
        height: size.height,
        width: size.width,
        color: Colors.white,
        child: Align(
          alignment: Alignment.center,
          child: Column(children: [
            SizedBox(
              width: 32,
              height: 32,
              child: CircularProgressIndicator(color: color),
            ),
            const SizedBox(height: 10),
            Text(
              title,
              style: TextStyle(fontSize: fontSize, color: color),
            ),
          ]),
        ),
      ),
    );
  }
}

class FxLoadingWidget extends StatelessWidget {
  final String title;
  final Color color;
  final double size;
  final double fontSize;
  const FxLoadingWidget({
    Key? key,
    required this.title,
    this.color = Colors.blue,
    this.fontSize = 16.0,
    this.size = 48.0,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Material(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        mainAxisSize: MainAxisSize.max,
        children: [
          SizedBox(
            width: size,
            height: size,
            child: CircularProgressIndicator(
              color: color,
            ),
          ),
          const SizedBox(
            height: 10,
          ),
          Text(
            title,
            style: TextStyle(
              fontSize: fontSize,
              color: color,
            ),
          ),
        ],
      ),
    );
  }
}