monisuo/flutter_monisuo/lib/ui/pages/trade/components/placeholder_card.dart

import 'package:flutter/material.dart';
import '../../../../core/theme/app_spacing.dart';
import '../../../../core/theme/app_theme.dart';
import '../../../../core/theme/app_theme_extension.dart';

/// 占位卡片组件
///
/// 当未选择币种时显示的占位提示卡片。
class PlaceholderCard extends StatelessWidget {
  final String message;
  const PlaceholderCard({
    super.key,
    required this.message,
  });

  @override
  Widget build(BuildContext context) {
    return Container(
      width: double.infinity,
      padding: const EdgeInsets.all(AppSpacing.xl),
      decoration: BoxDecoration(
        color: context.appColors.surfaceCard,
        borderRadius: BorderRadius.circular(AppRadius.lg),
        border: Border.all(
          color: context.appColors.ghostBorder,
        ),
      ),
      child: Center(
        child: Text(message,
            style: AppTextStyles.headlineMedium(context).copyWith(
              color: context.colors.onSurfaceVariant,
            )),
      ),
    );
  }
}