KazukyAkayashi/m3_lightmeter
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added bottom widget to SliverScreen

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This commit is contained in:
Vadim 2024-10-24 12:09:11 +02:00
parent 756c179567
commit 3870dfeb28
2 changed files with 24 additions and 13 deletions
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27
lib/screens/shared/sliver_screen/screen_sliver.dart
View file

@ -1,15 +1,18 @@
import 'package:flutter/material.dart';
import 'package:lightmeter/generated/l10n.dart';
import 'package:lightmeter/res/dimens.dart';
import 'package:lightmeter/utils/text_height.dart';
class SliverScreen extends StatelessWidget {
final Widget title;
final List<Widget> appBarActions;
final PreferredSizeWidget? bottom;
final List<Widget> slivers;
const SliverScreen({
required this.title,
this.appBarActions = const [],
this.bottom,
required this.slivers,
super.key,
});
@ -24,7 +27,7 @@ class SliverScreen extends StatelessWidget {
slivers: <Widget>[
SliverAppBar.large(
automaticallyImplyLeading: false,
expandedHeight: Dimens.sliverAppBarExpandedHeight,
expandedHeight: Dimens.sliverAppBarExpandedHeight + (bottom?.preferredSize.height ?? 0.0),
flexibleSpace: FlexibleSpaceBar(
centerTitle: false,
titlePadding: const EdgeInsets.symmetric(horizontal: Dimens.paddingM),
@ -37,10 +40,12 @@ class SliverScreen extends StatelessWidget {
overflow: TextOverflow.ellipsis,
child: _Title(
actionsCount: appBarActions.length + (Navigator.of(context).canPop() ? 1 : 0),
bottomSize: bottom?.preferredSize.height ?? 0.0,
child: title,
),
),
),
bottom: bottom,
actions: [
...appBarActions,
if (Navigator.of(context).canPop())
@ -62,35 +67,37 @@ class SliverScreen extends StatelessWidget {
class _Title extends StatelessWidget {
final Widget child;
final int actionsCount;
final double bottomSize;
final double actionsPadding;
const _Title({
required this.actionsCount,
required this.bottomSize,
required this.child,
}) : actionsPadding = Dimens.grid48 * actionsCount - Dimens.paddingM;
@override
Widget build(BuildContext context) {
final settings = context.dependOnInheritedWidgetOfExactType<FlexibleSpaceBarSettings>()!;
final titleScale = _titleScale(settings);
final extentScale =
((settings.maxExtent - settings.currentExtent) / (settings.maxExtent - settings.minExtent)).clamp(0.0, 1.0);
final titleScale = Tween<double>(begin: 1.5, end: 1.0).transform(extentScale);
final maxFromTextToAppbar = settings.maxExtent - settings.minExtent - Dimens.paddingM;
final currentFromTextToAppbar = settings.currentExtent - settings.minExtent - Dimens.paddingM;
final actionsPaddingScale = (1 - currentFromTextToAppbar / maxFromTextToAppbar).clamp(0.0, 1.0);
return LayoutBuilder(
builder: (context, constraints) => SizedBox(
height: settings.minExtent - MediaQuery.paddingOf(context).top,
builder: (context, constraints) => Padding(
padding: EdgeInsets.only(bottom: (Dimens.paddingM * (1 - actionsPaddingScale) + bottomSize) / titleScale),
child: SizedBox(
height: DefaultTextStyle.of(context).style.lineHeight * 2,
width: constraints.maxWidth - (actionsPadding * actionsPaddingScale) / titleScale,
child: Align(
alignment: Alignment.centerLeft,
alignment: FractionalOffset(0.0, 0.5 + 0.5 * (1 - extentScale)),
child: child,
),
),
),
);
}
double _titleScale(FlexibleSpaceBarSettings s) {
final extentScale = ((s.maxExtent - s.currentExtent) / (s.maxExtent - s.minExtent)).clamp(0.0, 1.0);
return Tween<double>(begin: 1.5, end: 1.0).transform(extentScale);
}
}

4
lib/utils/text_height.dart
View file

@ -34,3 +34,7 @@ Size textSize(
)..layout(maxWidth: maxWidth);
return titlePainter.size;
}
extension TextLineHeight on TextStyle {
double get lineHeight => fontSize! * height!;
}