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main.dart
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main.dart
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import 'package:flutter/material.dart';
import 'package:smooth_highlight/smooth_highlight.dart';
import 'package:touch_indicator/touch_indicator.dart';
void main() {
runApp(const App());
}
class App extends StatelessWidget {
const App({super.key});
@override
Widget build(BuildContext context) {
final routes = <String, WidgetBuilder>{
_ListViewExample.title: (context) => const _ListViewExample(),
_ContainerExample.title: (context) => const _ContainerExample(),
_ValueChangeExample.title: (context) => const _ValueChangeExample(),
_ValueChangeCustomExample.title: (context) =>
const _ValueChangeCustomExample(),
};
final pages = routes.entries.toList();
return MaterialApp(
debugShowCheckedModeBanner: false,
theme: ThemeData.from(
useMaterial3: true,
colorScheme: ColorScheme.fromSeed(
seedColor: Colors.green,
),
).copyWith(
dividerTheme: const DividerThemeData(space: 0),
),
routes: routes,
builder: ((context, child) => TouchIndicator(
child: child!,
)),
home: Scaffold(
appBar: AppBar(
title: const Text('Smooth Highlight'),
),
body: ListView.separated(
itemCount: pages.length,
separatorBuilder: (context, _) => const Divider(),
itemBuilder: (context, index) {
final page = pages[index];
return ListTile(
title: Text(page.key),
trailing: const Icon(Icons.navigate_next),
onTap: () {
Navigator.of(context).pushNamed(page.key);
},
);
},
),
),
);
}
}
class _ListViewExample extends StatefulWidget {
const _ListViewExample();
static const title = 'ListViewExample';
@override
State<_ListViewExample> createState() => _ListViewExampleState();
}
class _ListViewExampleState extends State<_ListViewExample> {
int targetIndex = 0;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text(_ListViewExample.title),
),
body: ListView.separated(
itemCount: 30,
separatorBuilder: (context, _) => const Divider(),
itemBuilder: (context, index) {
return SmoothHighlight(
enabled: index == targetIndex,
color: Colors.yellow,
child: ListTile(
title: Text('index: $index'),
onTap: () {},
),
);
},
),
floatingActionButton: FloatingActionButton(
onPressed: () {
setState(() {
targetIndex++;
});
},
child: const Icon(Icons.refresh),
),
);
}
}
class _ContainerExample extends StatefulWidget {
const _ContainerExample();
static const title = 'ContainerExample';
@override
State<_ContainerExample> createState() => _ContainerExampleState();
}
class _ContainerExampleState extends State<_ContainerExample> {
final _highlight = false;
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
final colorScheme = theme.colorScheme;
return Scaffold(
appBar: AppBar(
title: const Text(_ContainerExample.title),
),
body: Center(
child: Row(
mainAxisSize: MainAxisSize.min,
children: [
SmoothHighlight(
useInitialHighLight: true,
color: Colors.yellow,
child: Container(
width: 100,
height: 100,
margin: const EdgeInsets.all(10),
color: colorScheme.primary,
child: Center(
child: Text(
'Highlight Object',
style: TextStyle(
color: colorScheme.onPrimary,
),
textAlign: TextAlign.center,
),
),
),
),
Container(
width: 100,
height: 100,
margin: const EdgeInsets.all(10),
color: colorScheme.primary,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: () {
setState(() {
_highlight == !_highlight;
});
},
child: const Icon(Icons.refresh),
),
);
}
}
/// Highlights whenever count changes if `highlight` property changes true.
class _ValueChangeExample extends StatefulWidget {
const _ValueChangeExample();
static const title = 'ValueChangeExample';
@override
State<_ValueChangeExample> createState() => _ValueChangeExampleState();
}
class _ValueChangeExampleState extends State<_ValueChangeExample> {
var count = 0;
var highlight = true;
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
return Scaffold(
appBar: AppBar(
title: const Text(_ValueChangeExample.title),
),
body: Column(
children: [
const Padding(
padding: EdgeInsets.symmetric(horizontal: 16),
child: Text(
'This example highlights whenever count changes if `highlight` property is true.',
),
),
Expanded(
child: Center(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
ValueChangeHighlight(
value: count,
padding: const EdgeInsets.all(4),
color: Colors.yellow,
child: Text(
'count: $count',
style: theme.textTheme.titleLarge,
),
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Text(
'highlight: ${!highlight}',
),
),
],
),
),
)
],
),
floatingActionButton: FloatingActionButton(
onPressed: () {
setState(() {
// if `highlight` is false, this widget rebuilds but cannot show highlight.
if (highlight) {
count++;
}
highlight = !highlight;
});
},
child: const Icon(Icons.refresh),
),
);
}
}
/// Highlights whenever count changes unless count `null` or `2`
class _ValueChangeCustomExample extends StatefulWidget {
const _ValueChangeCustomExample();
static const title = 'ValueChangeCustomExample';
@override
State<_ValueChangeCustomExample> createState() =>
_ValueChangeCustomExampleState();
}
class _ValueChangeCustomExampleState extends State<_ValueChangeCustomExample> {
int? count;
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
return Scaffold(
appBar: AppBar(
title: const Text(_ValueChangeCustomExample.title),
),
body: Column(
children: [
const Padding(
padding: EdgeInsets.symmetric(horizontal: 16),
child: Text(
'This example highlights whenever count changes unless count `null` or `2`',
),
),
Expanded(
child: Center(
child: ValueChangeHighlight(
value: count,
// disable highlight if count changes from `null` or `2`.
disableFromValues: const [null, 2],
padding: const EdgeInsets.all(4),
color: Colors.yellow,
child: Text(
'count: $count',
style: theme.textTheme.titleLarge,
),
),
),
)
],
),
floatingActionButton: FloatingActionButton(
onPressed: () {
setState(() {
count == null ? count = 0 : count = count! + 1;
});
},
child: const Icon(Icons.refresh),
),
);
}
}