expandable 4.0.1
expandable: ^4.0.1 copied to clipboard
A Flutter widget that can be expanded or collapsed by clicking on a header or an icon.
import 'package:expandable/expandable.dart';
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Expandable Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
@override
State createState() {
return MyHomePageState();
}
}
class MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Expandable Demo"),
),
body: ExpandableTheme(
data: ExpandableThemeData(iconColor: Colors.blue, useInkWell: false),
child: ListView(
children: <Widget>[
Card1(),
Card2(),
],
),
),
);
}
}
const loremIpsum = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.";
class Card1 extends StatelessWidget {
@override
Widget build(BuildContext context) {
return ExpandableNotifier(
child: ScrollOnExpand(
scrollOnExpand: false,
scrollOnCollapse: true,
child: Padding(
padding: const EdgeInsets.all(10),
child: Card(
clipBehavior: Clip.antiAlias,
child: Column(
children: <Widget>[
SizedBox(
height: 150,
child: Container(
decoration: BoxDecoration(
color: Colors.orange,
shape: BoxShape.rectangle,
),
),
),
ScrollOnExpand(
scrollOnExpand: true,
scrollOnCollapse: false,
child: ExpandableNotifier(
initialExpanded: true,
child: ExpandablePanel(
tapHeaderToExpand: true,
tapBodyToCollapse: true,
theme: ExpandableThemeData(headerAlignment: ExpandablePanelHeaderAlignment.center),
header: Padding(
padding: EdgeInsets.all(10),
child: Text("ExpandablePanel",
style: Theme.of(context).textTheme.body2,
)
),
collapsed: Text(loremIpsum, softWrap: true, maxLines: 2, overflow: TextOverflow.ellipsis,),
expanded: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
for(var _ in Iterable.generate(5))
Padding(
padding: EdgeInsets.only(bottom: 10),
child: Text(loremIpsum, softWrap: true, overflow: TextOverflow.fade,)
),
],
),
builder: (_, collapsed, expanded) {
return Padding(
padding: EdgeInsets.only(left: 10, right: 10, bottom: 10),
child: Expandable(
collapsed: collapsed,
expanded: expanded,
theme: ExpandableThemeData(crossFadePoint: 0),
),
);
},
),
),
),
],
),
),
),
)
);
}
}
class Card2 extends StatelessWidget {
@override
Widget build(BuildContext context) {
buildImg(Color color, double height) {
return SizedBox(
height: height,
child: Container(
decoration: BoxDecoration(
color: color,
shape: BoxShape.rectangle,
),
)
);
}
buildCollapsed1() {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Padding(
padding: EdgeInsets.all(10),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text("Expandable",
style: Theme.of(context).textTheme.body1,
),
],
),
),
]
);
}
buildCollapsed2() {
return buildImg(Colors.lightGreenAccent, 150);
}
buildCollapsed3() {
return Container();
}
buildExpanded1() {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Padding(
padding: EdgeInsets.all(10),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text("Expandable",
style: Theme.of(context).textTheme.body1,
),
Text("3 Expandable widgets",
style: Theme.of(context).textTheme.caption,
),
],
),
),
]
);
}
buildExpanded2() {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Row(
children: <Widget>[
Expanded(
child: buildImg(Colors.lightGreenAccent, 100)
),
Expanded(
child: buildImg(Colors.orange, 100)
),
],
),
Row(
children: <Widget>[
Expanded(
child: buildImg(Colors.lightBlue, 100)
),
Expanded(
child: buildImg(Colors.cyan, 100)
),
],
),
],
);
}
buildExpanded3() {
return Padding(
padding: EdgeInsets.all(10),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(loremIpsum, softWrap: true,),
],
),
);
}
return ExpandableNotifier(
child: Padding(
padding: const EdgeInsets.only(left: 10, right: 10, bottom: 10),
child: ScrollOnExpand(
child: Card(
clipBehavior: Clip.antiAlias,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Expandable(
collapsed: buildCollapsed1(),
expanded: buildExpanded1(),
),
Expandable(
collapsed: buildCollapsed2(),
expanded: buildExpanded2(),
),
Expandable(
collapsed: buildCollapsed3(),
expanded: buildExpanded3(),
),
Divider(height: 1,),
Row(
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
Builder(
builder: (context) {
var controller = ExpandableController.of(context);
return FlatButton(
child: Text(controller.expanded ? "COLLAPSE": "EXPAND",
style: Theme.of(context).textTheme.button.copyWith(
color: Colors.deepPurple
),
),
onPressed: () {
controller.toggle();
},
);
},
),
],
),
],
),
),
),
)
);
}
}