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Inject color into the ExpansionCard

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This commit is contained in:
Vishnu Mohandas 2021-02-05 16:40:05 +05:30
parent 16a7e5d67f
commit 5bab89b493
2 changed files with 276 additions and 28 deletions
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231
lib/ui/expansion_card.dart Normal file
View file

@ -0,0 +1,231 @@
import 'package:flutter/widgets.dart';
import 'package:flutter/material.dart';
const Duration _kExpand = Duration(milliseconds: 200);
/// A single-line [ListTile] with a trailing button that expands or collapses
/// the tile to reveal or hide the [children].
///
/// This widget is typically used with [ListView] to create an
/// "expand / collapse" list entry. When used with scrolling widgets like
/// [ListView], a unique [PageStorageKey] must be specified to enable the
/// [ExpansionTile] to save and restore its expanded state when it is scrolled
/// in and out of view.
///
/// See also:
///
/// * [ListTile], useful for creating expansion tile [children] when the
/// expansion tile represents a sublist.
/// * The "Expand/collapse" section of
/// <https://material.io/guidelines/components/lists-controls.html>.
class ExpansionCard extends StatefulWidget {
/// Creates a single-line [ListTile] with a trailing button that expands or collapses
/// the tile to reveal or hide the [children]. The [initiallyExpanded] property must
/// be non-null.
const ExpansionCard({
Key key,
this.leading,
@required this.title,
this.background,
this.backgroundColor,
this.margin = const EdgeInsets.only(top: 30),
this.borderRadius = 30.0,
this.onExpansionChanged,
this.children = const <Widget>[],
this.trailing,
this.initiallyExpanded = false,
this.color,
}) : assert(initiallyExpanded != null),
super(key: key);
/// Adds margin to content of the card.
final EdgeInsets margin;
/// Provides CircularRadius to the border of the card.
final double borderRadius;
/// A widget to add background.
/// it can be a gif or image.
final Widget background;
/// A widget to display before the title.
///
/// Typically a [CircleAvatar] widget.
final Widget leading;
/// The primary content of the list item.
///
/// Typically a [Text] widget.
final Widget title;
/// Called when the tile expands or collapses.
///
/// When the tile starts expanding, this function is called with the value
/// true. When the tile starts collapsing, this function is called with
/// the value false.
final ValueChanged<bool> onExpansionChanged;
/// The widgets that are displayed when the tile expands.
///
/// Typically [ListTile] widgets.
final List<Widget> children;
/// The color to display behind the sublist when expanded.
final Color backgroundColor;
/// A widget to display instead of a rotating arrow icon.
final Widget trailing;
/// Specifies if the list tile is initially expanded (true) or collapsed (false, the default).
final bool initiallyExpanded;
/// Color of the expanded heading and icon
final Color color;
@override
_ExpansionTileState createState() => _ExpansionTileState();
}
class _ExpansionTileState extends State<ExpansionCard>
with SingleTickerProviderStateMixin {
static final Animatable<double> _easeOutTween =
CurveTween(curve: Curves.easeOut);
static final Animatable<double> _easeInTween =
CurveTween(curve: Curves.easeIn);
static final Animatable<double> _halfTween =
Tween<double>(begin: 0.0, end: 0.5);
final ColorTween _borderColorTween = ColorTween();
final ColorTween _headerColorTween = ColorTween();
final ColorTween _iconColorTween = ColorTween();
final ColorTween _backgroundColorTween = ColorTween();
AnimationController _controller;
Animation<double> _iconTurns;
Animation<double> _heightFactor;
Animation<Color> _headerColor;
Animation<Color> _iconColor;
Animation<Color> _backgroundColor;
bool _isExpanded = false;
@override
void initState() {
super.initState();
_controller = AnimationController(duration: _kExpand, vsync: this);
_heightFactor = _controller.drive(_easeInTween);
_iconTurns = _controller.drive(_halfTween.chain(_easeInTween));
_headerColor = _controller.drive(_headerColorTween.chain(_easeInTween));
_iconColor = _controller.drive(_iconColorTween.chain(_easeInTween));
_backgroundColor =
_controller.drive(_backgroundColorTween.chain(_easeOutTween));
_isExpanded =
PageStorage.of(context)?.readState(context) ?? widget.initiallyExpanded;
if (_isExpanded) _controller.value = 1.0;
}
@override
void dispose() {
_controller.dispose();
super.dispose();
}
void _handleTap() {
setState(() {
_isExpanded = !_isExpanded;
if (_isExpanded) {
_controller.forward();
} else {
_controller.reverse().then<void>((void value) {
if (!mounted) return;
setState(() {
// Rebuild without widget.children.
});
});
}
PageStorage.of(context)?.writeState(context, _isExpanded);
});
if (widget.onExpansionChanged != null)
widget.onExpansionChanged(_isExpanded);
}
Widget _buildChildren(BuildContext context, Widget child) {
final Color borderSideColor = Colors.transparent; // _borderColor.value ??
return Stack(
children: <Widget>[
widget.background == null
? Container()
: ClipRRect(
borderRadius: BorderRadius.circular(widget.borderRadius),
child: Align(
heightFactor:
_heightFactor.value < 0.5 ? 0.5 : _heightFactor.value,
child: widget.background,
),
),
Container(
decoration: BoxDecoration(
color: _backgroundColor.value ?? Colors.transparent,
border: Border(
top: BorderSide(color: borderSideColor),
bottom: BorderSide(color: borderSideColor),
),
),
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
ListTileTheme.merge(
iconColor: _iconColor.value,
textColor: _headerColor.value,
child: Container(
margin: widget.margin,
child: ListTile(
onTap: _handleTap,
leading: widget.leading,
title: widget.title,
trailing: widget.trailing ??
RotationTransition(
turns: _iconTurns,
child: const Icon(Icons.expand_more),
),
),
)),
ClipRect(
child: Align(
heightFactor: _heightFactor.value,
child: child,
),
),
],
),
)
],
);
}
@override
void didChangeDependencies() {
final ThemeData theme = Theme.of(context);
_borderColorTween..end = theme.dividerColor;
_headerColorTween
..begin = Colors.white
..end = widget.color ?? Color(0xff60c9df);
_iconColorTween
..begin = Colors.white
..end = widget.color ?? Color(0xff60c9df);
_backgroundColorTween..end = widget.backgroundColor;
super.didChangeDependencies();
}
@override
Widget build(BuildContext context) {
final bool closed = !_isExpanded && _controller.isDismissed;
return AnimatedBuilder(
animation: _controller.view,
builder: _buildChildren,
child: closed ? null : Column(children: widget.children),
);
}
}

73
lib/ui/subscription_page.dart
View file

@ -2,13 +2,12 @@ import 'dart:async';
import 'dart:convert';
import 'dart:io';
import 'package:expansion_card/expansion_card.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_inappwebview/flutter_inappwebview.dart';
import 'package:in_app_purchase/in_app_purchase.dart';
import 'package:logging/logging.dart';
import 'package:photos/ui/expansion_card.dart';
import 'package:progress_dialog/progress_dialog.dart';
import 'package:url_launcher/url_launcher.dart';
@ -296,20 +295,24 @@ class _SubscriptionPageState extends State<SubscriptionPage> {
),
]);
} else {
widgets.addAll([
Align(
alignment: Alignment.topLeft,
child: Padding(
padding: EdgeInsets.all(12),
child: Text(
"we offer a 14 day free trial, you can cancel anytime",
style: TextStyle(
color: Colors.white,
height: 1.2,
if (_currentSubscription == null) {
widgets.addAll([
Align(
alignment: Alignment.topLeft,
child: Padding(
padding: EdgeInsets.all(12),
child: Text(
"we offer a 14 day free trial, you can cancel anytime",
style: TextStyle(
color: Colors.white,
height: 1.2,
),
),
),
),
),
]);
}
widgets.addAll([
Expanded(child: Container()),
Align(
alignment: Alignment.center,
@ -390,21 +393,7 @@ class _BillingQuestionsWidgetState extends State<BillingQuestionsWidget> {
),
));
for (final faq in snapshot.data) {
faqs.add(ExpansionCard(
margin: EdgeInsets.only(bottom: 2),
title: Text(faq.q),
children: [
Padding(
padding: const EdgeInsets.only(left: 16, right: 16),
child: Text(
faq.a,
style: TextStyle(
height: 1.5,
),
),
)
],
));
faqs.add(FaqWidget(faq: faq));
}
faqs.add(Padding(
padding: EdgeInsets.all(16),
@ -424,6 +413,34 @@ class _BillingQuestionsWidgetState extends State<BillingQuestionsWidget> {
}
}
class FaqWidget extends StatelessWidget {
const FaqWidget({
Key key,
@required this.faq,
}) : super(key: key);
final faq;
@override
Widget build(BuildContext context) {
return ExpansionCard(
title: Text(faq.q),
color: Theme.of(context).accentColor,
children: [
Padding(
padding: const EdgeInsets.only(left: 16, right: 16),
child: Text(
faq.a,
style: TextStyle(
height: 1.5,
),
),
)
],
);
}
}
class FaqItem {
final String q;
final String a;