148 lines
4.5 KiB
Dart
148 lines
4.5 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:selfprivacy/ui/components/pre_styled_buttons/flash_fab.dart';
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import 'package:selfprivacy/ui/helpers/widget_size.dart';
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class BrandHeroScreen extends StatelessWidget {
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const BrandHeroScreen({
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required this.children,
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final super.key,
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this.hasBackButton = true,
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this.hasFlashButton = true,
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this.heroIcon,
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this.heroIconWidget,
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this.heroTitle = '',
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this.heroSubtitle,
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this.onBackButtonPressed,
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});
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final List<Widget> children;
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final bool hasBackButton;
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final bool hasFlashButton;
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final IconData? heroIcon;
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final Widget? heroIconWidget;
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final String heroTitle;
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final String? heroSubtitle;
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final VoidCallback? onBackButtonPressed;
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@override
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Widget build(final BuildContext context) {
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final Widget heroIconWidget = this.heroIconWidget ??
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Icon(
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heroIcon ?? Icons.help,
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size: 48.0,
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color: Theme.of(context).colorScheme.onBackground,
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);
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final bool hasHeroIcon = heroIcon != null || this.heroIconWidget != null;
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return Scaffold(
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floatingActionButton: hasFlashButton ? const BrandFab() : null,
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body: CustomScrollView(
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slivers: [
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HeroSliverAppBar(
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heroTitle: heroTitle,
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hasHeroIcon: hasHeroIcon,
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hasBackButton: hasBackButton,
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onBackButtonPressed: onBackButtonPressed,
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heroIconWidget: heroIconWidget,
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),
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if (heroSubtitle != null)
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SliverPadding(
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padding: const EdgeInsets.symmetric(
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horizontal: 16.0,
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vertical: 4.0,
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),
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sliver: SliverList(
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delegate: SliverChildListDelegate([
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Text(
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heroSubtitle!,
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style: Theme.of(context).textTheme.bodyMedium!.copyWith(
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color: Theme.of(context).colorScheme.onBackground,
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),
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textAlign: hasHeroIcon ? TextAlign.center : TextAlign.start,
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),
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]),
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),
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),
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SliverPadding(
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padding: const EdgeInsets.all(16.0),
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sliver: SliverList(
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delegate: SliverChildListDelegate(children),
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),
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),
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],
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),
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);
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}
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}
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class HeroSliverAppBar extends StatefulWidget {
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const HeroSliverAppBar({
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required this.heroTitle,
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required this.hasHeroIcon,
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required this.hasBackButton,
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required this.onBackButtonPressed,
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required this.heroIconWidget,
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final super.key,
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});
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final String heroTitle;
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final bool hasHeroIcon;
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final bool hasBackButton;
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final VoidCallback? onBackButtonPressed;
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final Widget heroIconWidget;
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@override
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State<HeroSliverAppBar> createState() => _HeroSliverAppBarState();
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}
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class _HeroSliverAppBarState extends State<HeroSliverAppBar> {
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Size _size = Size.zero;
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@override
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Widget build(final BuildContext context) => SliverAppBar(
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expandedHeight:
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widget.hasHeroIcon ? 148.0 + _size.height : 72.0 + _size.height,
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primary: true,
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pinned: true,
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stretch: true,
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leading: widget.hasBackButton
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? IconButton(
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icon: const Icon(Icons.arrow_back),
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onPressed: widget.onBackButtonPressed ??
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() => Navigator.of(context).pop(),
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)
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: null,
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flexibleSpace: FlexibleSpaceBar(
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title: LayoutBuilder(
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builder: (final context, final constraints) => SizedBox(
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width: constraints.maxWidth - 72.0,
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child: WidgetSize(
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onChange: (final Size size) => setState(() => _size = size),
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child: Text(
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widget.heroTitle,
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style: Theme.of(context).textTheme.titleLarge?.copyWith(
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color: Theme.of(context).colorScheme.onSurface,
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),
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overflow: TextOverflow.fade,
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textAlign: TextAlign.center,
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),
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),
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),
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),
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expandedTitleScale: 1.2,
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centerTitle: true,
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collapseMode: CollapseMode.pin,
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titlePadding: const EdgeInsets.only(
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bottom: 12.0,
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top: 16.0,
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),
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background: Column(
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mainAxisAlignment: MainAxisAlignment.start,
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children: [
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const SizedBox(height: 72.0),
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if (widget.hasHeroIcon) widget.heroIconWidget,
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],
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),
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),
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);
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}
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