trackoffical_app/lib/widget/app_dialog.dart

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

import '../styles/theme.dart';

const _horizontalEdge = 20.0;
const _cardHeight = 225.4;

double _getCardTop(BuildContext context) {
  return (context.height - _cardHeight) / 2.7;
}

class AppDialog extends StatelessWidget {
  final VoidCallback? onConfirm;
  final VoidCallback? onCancel;
  final String? onConfirmText;
  final String? onCancelText;
  final Widget title;
  final Widget? content;

  const AppDialog(
      {super.key,
      this.onConfirm,
      this.onCancel,
      this.onConfirmText,
      this.onCancelText,
      required this.title,
      this.content});

  @override
  Widget build(BuildContext context) {
    final style = (context.textTheme.titleLarge ?? const TextStyle()).copyWith(
        color: Colors.white, fontSize: 35.93, fontWeight: FontWeight.w700);

    final children = <Widget>[
      DefaultTextStyle(
          style: const TextStyle(
            fontSize: 17.42,
            color: Colors.white,
          ),
          child: title),
      const SizedBox(height: 6)
    ];
    if (content != null) {
      children.add(
        DefaultTextStyle(
            style: const TextStyle(
              fontSize: 15.24,
              color: Colors.white,
            ),
            child: content!),
      );
    }
    final actions = <Widget>[];

    actions.add(OutlinedButton(
        onPressed: onCancel ?? () => Get.back(),
        child: Text(onCancelText ?? '取消')));

    if (onConfirm != null) {
      actions.add(FilledButton(
          onPressed: onConfirm, child: Text(onConfirmText ?? '确定')));
    }
    var ali = MainAxisAlignment.center;
    if (actions.length > 1) {
      ali = MainAxisAlignment.spaceBetween;
    }
    children.add(SizedBox(
        width: 220,
        child: Padding(
            padding: const EdgeInsets.fromLTRB(15, 22, 15, 0),
            child: Row(
              mainAxisAlignment: ali,
              children: actions,
            ))));

    return Stack(alignment: Alignment.center, children: [
      Card(
        color: Colors.transparent,
        surfaceTintColor: Colors.transparent,
        shadowColor: Colors.transparent,
        child: Container(
              decoration: BoxDecoration(
                  color: const Color(0x70000000),
                  borderRadius: BorderRadius.circular(7.62)),
              padding: const EdgeInsets.all(15),
              child: Column(
                mainAxisSize: MainAxisSize.min,
                children: children,
              )))
    ]);
  }
}

class _Empty extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    _showDialog();

    return const Scaffold();
  }
}

Future<void> _showDialog() async {
  await Future.delayed(2.seconds);
  if (Get.isOverlaysOpen) {
    Get.back();
  }

  Get.dialog(AppDialog(
    onConfirm: () {},
    onCancel: () {},
    title: const Text('退出比赛'),
    content: const Text('是否强制结束？'),
    onCancelText: '否',
    onConfirmText: '是',
  ));
}

void main() async {
  runApp(GetMaterialApp(theme: appThemeData(), home: _Empty()));
}