hash-wallet/lib/new-ui/widgets/modal_page_wrapper.dart

import 'package:cake_wallet/new-ui/widgets/modal_header.dart';
import 'package:cake_wallet/new-ui/widgets/receive_page/receive_top_bar.dart';
import 'package:flutter/material.dart';
import 'package:modal_bottom_sheet/modal_bottom_sheet.dart';

void nothing() {}

class ModalPageWrapper extends StatelessWidget {
  ModalPageWrapper(
      {super.key,
      required this.content,
      required this.topBar,
      this.header,
      this.bottomContent,
      this.horizontalPadding = 18.0,
      this.verticalPadding = 72.0}) {}

  final Widget content;
  final Widget? bottomContent;
  final ModalTopBar topBar;
  final ModalHeader? header;
  final double horizontalPadding;
  final double verticalPadding;

  @override
  Widget build(BuildContext context) {
    const gradientSize = 84;

    return Container(
      color: Theme.of(context).colorScheme.surface,
      child: Scaffold(
        resizeToAvoidBottomInset: true,
        body: Stack(
          alignment: Alignment.topCenter,
          children: [
            Positioned.fill(
                child: Padding(
                    padding: EdgeInsets.symmetric(horizontal: horizontalPadding),
                    child: CustomScrollView(
                      controller: ModalScrollController.of(context),
                      physics: ClampingScrollPhysics(),
                      slivers: [
                        SliverToBoxAdapter(child: SizedBox(height: verticalPadding)),
                        if (header != null) ...[
                          SliverToBoxAdapter(child: header),
                          SliverToBoxAdapter(child: SizedBox(height: 20)),
                        ],
                        SliverSafeArea(sliver: SliverToBoxAdapter(child: content)),
                        SliverToBoxAdapter(child: SizedBox(height: verticalPadding)),
                      ],
                    ))),
            if (bottomContent != null)
              Positioned(
                bottom: 12,
                left: horizontalPadding,
                right: horizontalPadding,
                child: SafeArea(child: bottomContent!),
              ),
            Container(
              height: (MediaQuery.of(context).padding.top + gradientSize),
              decoration: BoxDecoration(
                gradient: LinearGradient(
                  begin: Alignment.bottomCenter,
                  end: Alignment.topCenter,
                  colors: <Color>[
                    Theme.of(context).colorScheme.surface.withAlpha(5),
                    Theme.of(context).colorScheme.surface.withAlpha(25),
                    Theme.of(context).colorScheme.surface.withAlpha(50),
                    Theme.of(context).colorScheme.surface.withAlpha(100),
                    Theme.of(context).colorScheme.surface.withAlpha(150),
                    Theme.of(context).colorScheme.surface.withAlpha(200),
                    Theme.of(context).colorScheme.surface.withAlpha(235),
                    Theme.of(context).colorScheme.surface.withAlpha(255),
                    Theme.of(context).colorScheme.surface.withAlpha(255),
                    Theme.of(context).colorScheme.surface.withAlpha(255),
                  ],
                ),
              ),
            ),
            topBar,
          ],
        ),
      ),
    );
  }
}