transition_lab 0.2.0 
transition_lab: ^0.2.0 copied to clipboard
Page transitions re-created from well-known apps: the Wolt swing, iOS zoom and sheet, Instagram cube, photo drag to dismiss, page curl, doors, mini-player.
import 'package:flutter/material.dart';
import 'package:flutter/scheduler.dart' show timeDilation;
import 'package:transition_lab/transition_lab.dart';
import 'demo_data.dart';
import 'pages/app_page.dart';
import 'pages/boarding_pass.dart';
import 'pages/book_page.dart';
import 'pages/chat_page.dart';
import 'pages/destination_page.dart';
import 'pages/photo_viewer.dart';
import 'pages/place_sheet.dart';
import 'pages/player.dart';
import 'pages/room_page.dart';
import 'pages/shortcut_page.dart';
import 'pages/story_page.dart';
import 'pages/venue_page.dart';
void main() => runApp(const TransitionsDemoApp());
class TransitionsDemoApp extends StatelessWidget {
const TransitionsDemoApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Transition Lab',
debugShowCheckedModeBanner: false,
theme: ThemeData(
colorSchemeSeed: const Color(0xFF009DE0),
// Every MaterialPageRoute in the app now swings in.
pageTransitionsTheme: const PageTransitionsTheme(
builders: {
TargetPlatform.android: SwingPageTransitionsBuilder(),
TargetPlatform.iOS: SwingPageTransitionsBuilder(),
},
),
),
// Circular reveal opens from wherever the finger went down, and the
// mini-player stays above every page.
builder: (context, child) =>
TapPosition.tracker(child: MiniPlayer(child: child!)),
home: const DemoHomePage(),
);
}
}
class DemoHomePage extends StatefulWidget {
const DemoHomePage({super.key});
@override
State<DemoHomePage> createState() => _DemoHomePageState();
}
class _DemoHomePageState extends State<DemoHomePage> {
bool _slowMotion = timeDilation > 1;
final ValueNotifier<bool> _playing = ValueNotifier(true);
@override
void dispose() {
_playing.dispose();
super.dispose();
}
void _play(Track track) {
_playing.value = true;
MiniPlayer.of(context).open(
builder: (_) => PlayerPage(track: track, playing: _playing),
barBuilder: (_) => PlayerBar(track: track, playing: _playing),
);
}
@override
Widget build(BuildContext context) {
final NavigatorState navigator = Navigator.of(context);
return Scaffold(
appBar: AppBar(
title: const Text(
'Transitions',
style: TextStyle(fontWeight: FontWeight.w800),
),
actions: [
const Text('Slow-mo'),
Switch(
value: _slowMotion,
onChanged: (value) => setState(() {
_slowMotion = value;
timeDilation = value ? 5 : 1;
}),
),
const SizedBox(width: 8),
],
),
body: ListView(
// Keeps the last section clear of the mini-player's bar.
padding: EdgeInsets.fromLTRB(
16,
0,
16,
40 + MiniPlayer.barSpaceOf(context),
),
children: [
const SectionHeader(
number: 1,
title: 'Swing',
source: 'Wolt',
hint: 'Tap a venue. Swipe from the left edge to go back.',
),
SizedBox(
height: 190,
child: ListView.separated(
scrollDirection: Axis.horizontal,
itemCount: venues.length,
separatorBuilder: (_, __) => const SizedBox(width: 12),
itemBuilder: (context, i) => VenueCard(
venue: venues[i],
// A plain MaterialPageRoute: the theme makes it swing.
onTap: () => navigator.push(
MaterialPageRoute<void>(
builder: (_) => VenuePage(venue: venues[i]),
),
),
),
),
),
const SectionHeader(
number: 2,
title: 'Zoom',
source: 'iOS 18 · Photos, App Store',
hint:
'Tap a card. Pull the page down, or tap close, to shrink it back.',
),
GridView.count(
crossAxisCount: 2,
shrinkWrap: true,
physics: const NeverScrollableScrollPhysics(),
mainAxisSpacing: 12,
crossAxisSpacing: 12,
childAspectRatio: 0.9,
children: [
for (final destination in destinations)
GestureDetector(
onTap: () => navigator.push(
ZoomPageRoute<void>(
tag: destination,
builder: (_) => DestinationPage(destination: destination),
),
),
child: ZoomSource(
tag: destination,
borderRadius: 20,
child: DestinationCard(destination: destination),
),
),
],
),
const SectionHeader(
number: 3,
title: 'Cube',
source: 'Instagram Stories',
hint: 'Tap a story. Tap the right half for the next one, the left '
'half for the previous one.',
),
SizedBox(
height: 92,
child: ListView.separated(
scrollDirection: Axis.horizontal,
itemCount: stories.length,
separatorBuilder: (_, __) => const SizedBox(width: 14),
itemBuilder: (context, i) => StoryAvatar(
story: stories[i],
onTap: () => navigator.push(
CubePageRoute<void>(builder: (_) => StoryPage(index: i)),
),
),
),
),
const SectionHeader(
number: 4,
title: 'Circular reveal',
source: 'Android, Telegram',
hint: 'Tap anywhere on a tile: the page opens from under your '
'finger.',
),
for (final shortcut in shortcuts)
Padding(
padding: const EdgeInsets.only(bottom: 10),
child: ShortcutTile(
shortcut: shortcut,
onTap: () => navigator.push(
CircularRevealRoute<void>(
builder: (_) => ShortcutPage(shortcut: shortcut),
),
),
),
),
Align(
alignment: Alignment.centerRight,
child: FloatingActionButton(
heroTag: null,
onPressed: () => navigator.push(
CircularRevealRoute<void>(
builder: (_) => const ShortcutPage(shortcut: newTrip),
),
),
child: const Icon(Icons.add),
),
),
const SectionHeader(
number: 5,
title: 'Full-screen swipe back',
source: 'Telegram',
hint: 'Open a chat and swipe right from anywhere on the screen.',
),
for (final chat in chats)
ListTile(
contentPadding: EdgeInsets.zero,
leading: CircleAvatar(
backgroundColor: chat.color,
child: Text(
chat.name[0],
style: const TextStyle(
color: Colors.white,
fontWeight: FontWeight.w700,
),
),
),
title: Text(
chat.name,
style: const TextStyle(fontWeight: FontWeight.w700),
),
subtitle: Text(chat.lastMessage),
trailing: Text(chat.time),
onTap: () => navigator.push(
FullSwipePageRoute<void>(builder: (_) => ChatPage(chat: chat)),
),
),
const SectionHeader(
number: 6,
title: 'Sheet',
source: 'Apple Maps, Music',
hint: 'Tap a place. Pull the sheet down from anywhere to close '
'it; open a place nearby to stack another sheet.',
),
for (final place in places)
ListTile(
contentPadding: EdgeInsets.zero,
leading: CircleAvatar(
backgroundColor: place.color,
child: Icon(place.icon, color: Colors.white),
),
title: Text(
place.name,
style: const TextStyle(fontWeight: FontWeight.w700),
),
subtitle: PlaceRating(place: place),
onTap: () => navigator.push(
SheetPageRoute<void>(builder: (_) => PlaceSheet(place: place)),
),
),
const SectionHeader(
number: 7,
title: 'Drag to dismiss',
source: 'Instagram, Telegram photo viewer',
hint: 'Tap a photo. Drag it up or down to close; it flies back '
'into the grid.',
),
GridView.count(
crossAxisCount: 3,
shrinkWrap: true,
physics: const NeverScrollableScrollPhysics(),
mainAxisSpacing: 4,
crossAxisSpacing: 4,
children: [
for (var i = 0; i < photoIcons.length; i++)
GestureDetector(
onTap: () => navigator.push(
DragDismissPageRoute<void>(
tag: 'photo $i',
builder: (_) => PhotoViewer(initialIndex: i),
),
),
child: ZoomSource(
tag: 'photo $i',
child: Photo(index: i),
),
),
],
),
const SectionHeader(
number: 8,
title: 'Flip',
source: 'A card turning over',
hint: 'Tap the boarding pass to turn it over.',
),
BoardingPassCard(
onTap: () => navigator.push(
FlipPageRoute<void>(builder: (_) => const BoardingPassPage()),
),
),
const SectionHeader(
number: 9,
title: 'Depth blur',
source: 'iOS app launch, visionOS',
hint: 'Tap an app: this page sinks back and blurs.',
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: [
for (final app in demoApps)
AppIcon(
app: app,
onTap: () => navigator.push(
DepthPageRoute<void>(builder: (_) => AppPage(app: app)),
),
),
],
),
const SectionHeader(
number: 10,
title: 'Door',
source: 'A doorway',
hint: 'Open a door: this page splits and swings open.',
),
Row(
children: [
for (final room in rooms) ...[
Expanded(
child: DoorTile(
room: room,
onTap: () => navigator.push(
DoorPageRoute<void>(builder: (_) => RoomPage(room: room)),
),
),
),
if (room != rooms.last) const SizedBox(width: 16),
],
],
),
const SectionHeader(
number: 11,
title: 'Page curl',
source: 'Apple Books',
hint: 'Open the book and turn the pages. Drag from the left edge '
'to lift the corner and turn back.',
),
Center(
child: BookCover(
onTap: () => navigator.push(
PageCurlRoute<void>(builder: (_) => const BookPage(index: 0)),
),
),
),
const SectionHeader(
number: 12,
title: 'Mini-player',
source: 'YouTube, Spotify',
hint: 'Play a track, then pull the player down: it shrinks into a '
'bar that stays over every page.',
),
for (final track in tracks)
ListTile(
contentPadding: EdgeInsets.zero,
leading: Artwork(track: track, size: 44),
title: Text(
track.title,
style: const TextStyle(fontWeight: FontWeight.w700),
),
subtitle: Text(track.artist),
trailing: const Icon(Icons.play_arrow),
onTap: () => _play(track),
),
],
),
);
}
}
class SectionHeader extends StatelessWidget {
const SectionHeader({
super.key,
required this.number,
required this.title,
required this.source,
required this.hint,
});
final int number;
final String title;
final String source;
final String hint;
@override
Widget build(BuildContext context) {
final ColorScheme colors = Theme.of(context).colorScheme;
return Padding(
padding: const EdgeInsets.fromLTRB(0, 24, 0, 12),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(
children: [
CircleAvatar(
radius: 12,
backgroundColor: colors.primary,
child: Text(
'$number',
style: TextStyle(
color: colors.onPrimary,
fontSize: 12,
fontWeight: FontWeight.w700,
),
),
),
const SizedBox(width: 8),
Expanded(
child: Text(
title,
style: const TextStyle(
fontSize: 20,
fontWeight: FontWeight.w800,
),
),
),
],
),
const SizedBox(height: 2),
Text(
source,
style: TextStyle(color: Colors.grey.shade600, fontSize: 13),
),
const SizedBox(height: 6),
Text(hint, style: TextStyle(color: Colors.grey.shade800)),
],
),
);
}
}
class VenueCard extends StatelessWidget {
const VenueCard({super.key, required this.venue, required this.onTap});
final Venue venue;
final VoidCallback onTap;
@override
Widget build(BuildContext context) {
return SizedBox(
width: 220,
child: InkWell(
borderRadius: BorderRadius.circular(16),
onTap: onTap,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Container(
height: 130,
width: double.infinity,
decoration: BoxDecoration(
color: venue.color,
borderRadius: BorderRadius.circular(16),
),
child: Icon(venue.icon, size: 56, color: Colors.white),
),
const SizedBox(height: 8),
Text(
venue.name,
style: const TextStyle(fontSize: 16, fontWeight: FontWeight.w700),
),
Text(
venue.tagline,
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: TextStyle(color: Colors.grey.shade600),
),
],
),
),
);
}
}
class StoryAvatar extends StatelessWidget {
const StoryAvatar({super.key, required this.story, required this.onTap});
final Story story;
final VoidCallback onTap;
@override
Widget build(BuildContext context) {
return GestureDetector(
onTap: onTap,
child: Column(
children: [
Container(
width: 66,
height: 66,
padding: const EdgeInsets.all(3),
decoration: const BoxDecoration(
shape: BoxShape.circle,
gradient: LinearGradient(
colors: [
Color(0xFFF58529),
Color(0xFFDD2A7B),
Color(0xFF8134AF),
],
),
),
child: Container(
padding: const EdgeInsets.all(2),
decoration: const BoxDecoration(
shape: BoxShape.circle,
color: Colors.white,
),
child: CircleAvatar(
backgroundColor: story.colors.first,
child: Icon(story.icon, color: Colors.white),
),
),
),
const SizedBox(height: 6),
Text(story.name, style: const TextStyle(fontSize: 12)),
],
),
);
}
}
class ShortcutTile extends StatelessWidget {
const ShortcutTile({super.key, required this.shortcut, required this.onTap});
final Shortcut shortcut;
final VoidCallback onTap;
@override
Widget build(BuildContext context) {
return Material(
color: shortcut.color,
borderRadius: BorderRadius.circular(16),
child: InkWell(
borderRadius: BorderRadius.circular(16),
onTap: onTap,
child: Padding(
padding: const EdgeInsets.all(16),
child: Row(
children: [
Icon(shortcut.icon, color: Colors.white),
const SizedBox(width: 12),
Text(
shortcut.title,
style: const TextStyle(
color: Colors.white,
fontSize: 17,
fontWeight: FontWeight.w700,
),
),
const Spacer(),
const Icon(Icons.chevron_right, color: Colors.white70),
],
),
),
),
);
}
}Metadata
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Metadata
Page transitions re-created from well-known apps: the Wolt swing, iOS zoom and sheet, Instagram cube, photo drag to dismiss, page curl, doors, mini-player.
Repository (GitHub)
View/report issues
Topics
#animation #transition #navigation #page-transition #ui
License
MIT (license)